Relevant bibliographies by topics / Spruce seedling

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Spruce seedling'

Author: Grafiati
Published: 4 June 2021
Last updated: 3 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Spruce seedling.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Spruce seedling"

1

O'Neill, G. A., C. P. Chanway, P. E. Axelrood, R. A. Radley, and F. B. Holl. "An assessment of spruce growth response specificity after inoculation with coexistent rhizosphere bacteria." Canadian Journal of Botany 70, no. 12 (1992): 2347–53. http://dx.doi.org/10.1139/b92-294.

Full text
Abstract:
The influence of inoculation with rhizosphere bacteria on hybrid spruce (Picea glauca × engelmannii) seedling growth was investigated by isolating bacteria from the rhizosphere of naturally regenerating spruce seedlings collected from two ecologically distinct zones of British Columbia. Forty bacterial strains from spruce were screened in a seedling growth experiment, and several strains were shown to stimulate spruce seedling growth. The three most effective spruce growth promoting strains from each ecological zone were then tested in a seedling growth response specificity experiment in which seed, soil, and bacteria from both spruce ecosystems were examined in all possible treatment combinations, including pasteurized soil. Spruce seedling growth was primarily affected by seed and soil source (Salmon Arm > Mackenzie for both factors), and by soil pasteurization (pasteurized > unpasteurized). Significant growth effects due to bacterial treatment in the specificity experiment occurred only in pasteurized soil, but seedling biomass accumulation was stimulated by up to 59% in response to inoculation. There was no evidence of growth response specificity that was related to plant – bacteria adaptation within spruce ecotypes; two of the Mackenzie bacterial strains significantly inhibited growth of Mackenzie seedlings in Mackenzie soil, but two strains stimulated the growth of Salmon Arm seedlings, one in each soil type. Two Salmon Arm strains significantly stimulated growth of Mackenzie seedlings on Salmon Arm soil, and two strains stimulated the growth of Salmon Arm seedlings, one in each soil type. Seedling biomass was greater when treatments of spruce seed, soil, and rhizosphere bacteria that originated from the same geographic site were pooled and compared with treatments in which at least one factor originated from the other site. However, this effect was explained by the significant seed × soil interaction in the absence of bacteria; mean seedling biomass was greatest when spruce seed and soil treatments with the same geographic origin were pooled and compared with unrelated seed – soil combinations. Seedlings from pooled treatments were also significantly larger when bacteria and soil had a common geographic origin, but only when tested in pasteurized soil. Our results indicate that spruce growth promoting rhizosphere bacteria can be isolated from naturally regenerating spruce seedlings, but growth response variability was observed between trials. Seedling growth promotion by bacterial strains was not related to the use of spruce ecotypes, soil, and (or) rhizosphere bacteria with a common geographic origin. Key words: spruce seedlings, growth, inoculation, rhizosphere bacteria.
APA, Harvard, Vancouver, ISO, and other styles
2

Attree, S. M., S. Budimir, and L. C. Fowke. "Somatic embryogenesis and plantlet regeneration from cultured shoots and cotyledons of seedlings from stored seeds of black and white sprees (Picea Mariana and Picea glauca)." Canadian Journal of Botany 68, no. 1 (1990): 30–34. http://dx.doi.org/10.1139/b90-005.

Full text
Abstract:
Embryogenic callus was induced from cultured explants of 12- to 30-day seedlings germinated from 10- and 4-year stored seeds of black and white spruce, respectively. Plantlets were regenerated from a 12-day black spruce seedling derived embryogenic callus. This is the oldest conifer seedling material shown to give rise to embryogenic callus, and the first demonstration in spruce that seedling-derived embryogenic calli are competent of plantlet regeneration. The effect of a cytokinin pretreatment on embryogenic callus induction from 12-day black spruce seedling shoot explants was investigated. Although an induction frequency of 18% occurred after 2 weeks preculture of shoot explants on medium containing 4.5 μM benzyladenine, the cytokinin pretreatment was not significantly superior to controls given no pretreatment (12%). Age of explant influenced embryogenic induction frequencies from black and white spruce. Explants from 21-day black spruce seedlings produced embryogenic calli at a frequency of 5%. In comparison, shoot explants from 12- and 30-day white spruce seedlings given no benzyladenine pretreatment displayed induction frequencies of 38 and 18%, respectively.
APA, Harvard, Vancouver, ISO, and other styles
3

Chanway, C. P., and F. B. Holl. "First year field performance of spruce seedlings inoculated with plant growth promoting rhizobacteria." Canadian Journal of Microbiology 39, no. 11 (1993): 1084–88. http://dx.doi.org/10.1139/m93-164.

Full text
Abstract:
The influence of plant growth promoting rhizobacteria on field performance of hybrid spruce (Picea glauca × engelmannii) was investigated by inoculating seedlings with rhizobacteria capable of stimulating seedling growth in a controlled environment. Two spruce ecotypes (from Mackenzie and Salmon Arm, British Columbia) and two bacterial strains previously isolated from naturally regenerating seedlings of each spruce ecotype were evaluated. Planting trials were conducted in the ecosystem from which each spruce ecotype and associated bacterial strain were originally collected, and at two alternative sites. Hydrogenophaga pseudoflava, which was isolated from Mackenzie spruce seedlings, caused increases in seedling biomass or branch number of up to 49%, but was most effective as a root growth promoter of the Salmon Arm spruce ecotype. Pseudomonas putida, which originated from Salmon Arm spruce seedlings, increased seedling biomass or branch number in two trials, but had inhibitory effects in three others. There was no indication that growth promotion was related to a common ecotypic origin of seedlings and rhizobacteria, or that bacteria were more effective in the ecosystem from which they were originally isolated. However, Salmon Arm spruce growth promotion by H. pseudoflava was greatest at the poorest quality planting site.Key words: field trials, inoculation, PGPR, spruce.
APA, Harvard, Vancouver, ISO, and other styles
4

Jalkanen, Anneli. "Growth and Morphology of Black Spruce, Jack Pine, and White Spruce Container Seedlings in Northern Ontario." Northern Journal of Applied Forestry 12, no. 2 (1995): 69–74. http://dx.doi.org/10.1093/njaf/12.2.69.

Full text
Abstract:
Abstract The development of morphological attributes of containerized seedlings during the growing season was studied in eight crops from three nurseries in Northern Ontario, including four black spruce crops, three jack pine crops, and one white spruce crop. The variability was proportionally largest in root and shoot dry mass, followed by height and diameter. During seedling growth, proportionally the variability of size did not seem to increase. In absolute scale, however, differences between individual seedlings increased more than differences between seedling trays, possibly due to competition between individuals. Height and shoot growth were greater in the beginning of the growing season, and diameter and root growth were greater toward the end. In comparison to standards, the balance between morphological attributes (height/diameter, shoot/root) was usually acceptable, and usually independent of seedling size. The easiest way of monitoring crop development is to take seedling samples at regular intervals and to construct a growth progression curve for seedling height, if diameter growth reaches acceptable level. Care should be taken that the height of seedlings does not increase too much at the expense of diameter and root development in the larger crops. To monitor this, height-diameter ratios and shoot-root ratios might be measured a couple of times during the growing season to take corrective action if necessary. North. J. Appl. For. 12(2):69-74.
APA, Harvard, Vancouver, ISO, and other styles
5

Fogal, W. H., G. Jobin, H. O. Schooley, S. J. Coleman, and M. S. Wolynetz. "Stem incorporation of gibberellins to promote sexual development of white spruce, Norway spruce, and jack pine." Canadian Journal of Forest Research 26, no. 2 (1996): 186–95. http://dx.doi.org/10.1139/x26-022.

Full text
Abstract:
Stem incorporation of gibberellins (GA4/7 60:40) by injecting a liquid formulation or implanting a solid formulation was evaluated for promoting sexual reproductive development and for effects on vegetative development and foliage chlorosis in seedling and grafted white spruce, Piceaglauca (Moench) Voss; seedling Norway spruce, Piceaabies (L.) Karst.; and jack pine, Pinusbanksiana Lamb., seed trees. Spruces were treated with a single application of 0.76 or 1.53 mg GA4/7 per square centimetre of stem cross-sectional area at breast height during the late stage of shoot elongation (June 9 for white spruce and June 19 and 20 for Norway spruce). Jack pine was treated with a single early (July 5) or late (August 15) application of 1.53 mg GA4/7/cm2 or a split early–late application of 0.76 mg GA4/7/cm2. Results were evaluated in the subsequent season (i) by counting seed and pollen strobili, developing vegetative shoots, latent vegetative buds, and dead buds and (ii) by assessing foliage chlorosis and mortality. The numbers of seed strobili were increased by injections of GA4/7 at low and high application rates on seedling white spruce and Norway spruce and by the high application rate on grafted white spruce; implants were effective on seedling white and Norway spruce at the high application rate. In jack pine, the number of seed strobili was not increased by GA4/7. The numbers of pollen strobili were not significantly increased by GA4/7 treatments to white spruce or Norway spruce but were increased on jack pine by a single early injection at the high rate and split injections at the low rate. The number of developing vegetative shoots was reduced by GA4/7 injections at both rates on white spruce grafted trees and Norway spruce; the implants reduced them only on the grafted white spruce given the low rate. For the spruces, treatments with GA4/7 did not influence bud mortality. Foliage chlorosis and mortality, evident on jack pine but not on white or Norway spruce trees, was more severe with injections than with implants.
APA, Harvard, Vancouver, ISO, and other styles
6

Fukasawa, Yu, Yoko Ando, Satoshi N. Suzuki, Mineaki Aizawa, and Daisuke Sakuma. "Climate influences the effect of fungal decay type on regeneration of Picea jezoensis var. hondoensis seedlings on decaying logs." Canadian Journal of Forest Research 50, no. 1 (2020): 73–79. http://dx.doi.org/10.1139/cjfr-2019-0147.

Full text
Abstract:
Hondo spruce (Picea jezoensis var. hondoensis (Mayr) Rehder)) is separately distributed among several mountainous regions in central Japan as remnant populations of the last glacial period. To identify factors that affect Hondo spruce seedling regeneration on decaying logs, we investigated the relationships between climatic conditions, log properties, including decay type by fungi, and Hondo spruce seedling density on logs using data from seven subalpine Hondo spruce forests in central Japan. The results showed that the presence of soft rot was associated with higher seedling density, and the effect of brown rot in sapwood and white rot in heartwood on the predicted number of spruce seedlings on logs switched from positive to negative with increasing temperature and precipitation. Because soft rot occurs under humid conditions, the use of forest management techniques that increase the number of logs with soft rot in sapwood (e.g., by keeping the forest floor moist) are recommended for the sustainable regeneration of Hondo spruce. However, the relationships between wood decay type and seedling regeneration can also be affected by climate condition and thus are more complex than previously thought.
APA, Harvard, Vancouver, ISO, and other styles
7

Wolken, Jane M., Simon M. Landhäusser, Victor J. Lieffers, and Uldis Silins. "Seedling growth and water use of boreal conifers across different temperatures and near-flooded soil conditions." Canadian Journal of Forest Research 41, no. 12 (2011): 2292–300. http://dx.doi.org/10.1139/x11-136.

Full text
Abstract:
To test the hypothesis that seedling growth and water use increase with soil temperature and improved soil aeration and vary with species, we evaluated the above- and below-ground growth and water use of seedlings of four northern boreal conifer species: black spruce ( Picea mariana (Mill.) B.S.P.), white spruce ( Picea glauca (Moench) Voss), tamarack ( Larix laricina (Du Roi) K. Koch), and lodgepole pine (Pinus contorta Dougl. ex Loud.) grown under different temperature and near-flooded soil conditions. Seedlings were grown in specialized pots that maintained the water table level at either 15 cm (high water table treatment: very wet) or 30 cm (low water table treatment: moderately wet) below the soil surface, and whole-seedling transpiration was assessed. Soil temperature (5, 10, or 20 °C) was controlled with a water bath surrounding the pots. Although some species were sensitive to the high water table treatment, soil temperature was the driver of seedling growth and water use. We ranked the ability of the seedlings of the species to tolerate the cold soil conditions examined as black spruce > lodgepole pine > tamarack > white spruce. The ranking of the ability to tolerate near-flooded conditions was tamarack and lodgepole pine > black spruce > white spruce.
APA, Harvard, Vancouver, ISO, and other styles
8

Man, Rongzhou, and Victor J. Lieffers. "Effects of shelterwood and site preparation on microclimate and establishment of white spruce seedlings in a boreal mixedwood forest." Forestry Chronicle 75, no. 5 (1999): 837–44. http://dx.doi.org/10.5558/tfc75837-5.

Full text
Abstract:
Microclimate and seedling response of planted white spruce were investigated under four canopy densities (control – a 120-year old uncut aspen/white spruce stand, low and high residual densities of shelterwood canopy, and clearcut) and three site preparation treatments in the Lower Foothills of central Alberta. The partial canopy of the shelterwoods had a less extreme environment than the clearcut: higher humidity and soil temperature, lower maximum air temperature and occurrence and severity of night frost, and a light regime that was nearly optimum for height growth of juvenile white spruce. Planted white spruce seedlings had earlier bud break, lower seedling mortality and terminal bud mortality, higher rates of photosynthesis and stomatal conductance, and greater height and diameter increments under shelterwoods than those in either clearcut or control. Site preparation increased soil temperature, decreased seedling mortality and improved growth, especially diameter growth. This study demonstrates how shelterwoods and site preparation can improve the establishment of white spruce. The findings of this study can be applied to the situations where white spruce establishes in the understory. Key words: shelterwood, site preparation, white spruce, seedling response, microclimatic conditions.
APA, Harvard, Vancouver, ISO, and other styles
9

Simpson, David G., and Alan Vyse. "Planting stock performance: Site and RGP effects." Forestry Chronicle 71, no. 6 (1995): 739–42. http://dx.doi.org/10.5558/tfc71739-6.

Full text
Abstract:
Douglas-fir [Pseudotsuga menziesii var glauca (Beissn.) Franco], interior spruce [Picea glauca Moench (Voss), Picea engelmannii (Parry) and their naturally occurring hybrids] and lodge-pole pine (Pinus contorta Dougl.) seedlings were planted on several forest sites in south central British Columbia. At planting, root growth potential (number of newly elongated roots longer than 10 mm per seedling) was determined. Trees were assessed for survival and height for at least five years. Survival of Douglas-fir and growth of all three species was affected by planting site, probably reflecting moisture and growing season temperature differences among sites. High (> 70%) survival, but not total height or mean annual relative growth rate was associated with root growth potential levels greater than 10 new roots per seedling in interior spruce and lodgepole pine. Survival and growth of Douglas-fir were not related to root growth potential. Fertilization of interior spruce seedlings at planting decreased survival 18% over seven growing seasons, and did not affect growth of surviving seedlings. Key words: reforestation, root growth potential, seedling quality, Douglas-fir, interior spruce, lodgepole pine, field performance
APA, Harvard, Vancouver, ISO, and other styles
10

Morris, D. M., G. B. MacDonald, and K. M. McClain. "Evaluation of morphological attributes as response variables to perennial competition for 4-year-old black spruce and jack pine seedlings." Canadian Journal of Forest Research 20, no. 11 (1990): 1696–703. http://dx.doi.org/10.1139/x90-226.

Full text
Abstract:
The sensitivity of seedling morphological attributes to changing competition levels was evaluated on 4-year-old black spruce (Piceamariana (Mill.) B.S.P.) and jack pine (Pinusbanksiana Lamb.) seedlings to determine the most appropriate response variables to be used in the assessment of early plantation performance. A total of 720 seedlings (360 per species) were sampled between 1987 and 1989, covering a range of stock types, soil textures, and competition levels. A competition index, derived from hemispherical photographs, provided an estimate of incident radiation received by each sampled seedling. Seedling stem volume at time of planting was used as a covariate in the regression analyses. Stratification by plantation was done to account for variations in site quality. The results from this study demonstrated that total height or current height increment were not reliable for quantifying individual seedling response to inter specific competition for 4-year-old black spruce or jack pine plantations. Overall, the most consistent response variable was total seedling dry weight. Coefficients of determination ranged from 0.116 to 0.534 for black spruce and from 0.601 to 0.810 for jack pine across the range of sites and stock types. If it is inappropriate to determine total seedling dry weight, root collar diameter would be the best substitute. Correlation coefficients between these two variables were 0.897 for black spruce and 0.912 for jack pine.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Spruce seedling"

1

Pauliukevičiūtė, Grybauskienė Vilda. "Irrigation Scheduling for Norway Spruce (Picea abies (L.) Karst.) Seedlings." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20110908_114726-07715.

Full text
Abstract:
The objectives of the thesis: • to analyse evapotranspiration of Norway spruce seedlings in irrigated and non-irrigated fields by applying lysimetric method; • to determine crop coefficient of spruce seedlings; • to measure dynamics of soil humidity during vegetation period; • to determine influence of irrigation regime on qualitative indices of spruce seedlings; • to determine optimal irrigation regime; • to set economic advantage of irrigation of Norway spruce seedlings.<br>Darbo uždaviniai: • ištirti paprastosios eglės sodinukų suminį išgaravimą drėkinamuose ir nedrėkinamuose plotuose lizimetriniu metodu; • nustatyti eglės sodinukų biologinius koeficientus; • įvertinti dirvožemio drėgmės dinamiką vegetacijos laikotarpiu; • nustatyti drėkinimo režimo įtaką eglės sodinukų kokybiniams rodikliams; • nustatyti optimalų drėkinimo režimą; • nustatyti paprastosios eglės sodinukų drėkinimo ekonominį efektyvumą.
APA, Harvard, Vancouver, ISO, and other styles
2

White, Helen Marie. "Biotic and Abiotic Factors of Picea rubens (Red Spruce) Seedling Regeneration in Disturbed Heathland Barrens of the Central Appalachians." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/101088.

Full text
Abstract:
During the late 19th and early 20th centuries, extensive logging reduced the forests of red spruce (Picea rubens) by nearly 99% through portions of West Virginia. In the wake of this disturbance, red spruce has begun regenerating on the ridge and mountaintop areas of Canaan Valley, West Virginia, where heath and grassland communities have both persisted in natural barrens and expanded into formerly forested areas. To understand abiotic and biotic conditions guiding the advance of the red spruce stand, I conducted a broad-scale assessment of thirty-one demographics plots spread across two sites (north Cabin Mountain and Bear Rocks/Dolly Sods), and a more focused assessment of red spruce species associations within thirty-two paired plots at Cabin Mountain. At the 15m x 15m demographics plots, I conducted a count of all P. rubens present, measured specimen height, DBH or diameter at ground level (DGL) for specimens < 1.37m tall, and assessed the relative percent cover of rock, shrub, herbaceous, and tree cover. These data, along with additional abiotic components derived from a DEM, formed the basis of my assessment using a generalized linear mixed model (GLMM) to identify the most significant biophysical variables related to P. rubens count. In the paired plots, I used the relative interactions index (RII) to compare the total cover of each present non-graminoid vascular species and the grouped cover types Rock, Graminoid, Lichen, Litter, and Moss in one 45cm-radius plot with a < 1.37m P. rubens specimen, and one paired 45cm-radius plot in open heath. The significance of differences in total cover were assessed with the Wilcoxon test and Tukey HSD. The GLMM identified percent rock cover and distance from the nearest P. rubens stand to be important correlates of P. rubens count at the demographic plots. Graminoid cover was found to be higher in P. rubens 45cm-radius plots than in paired heath plots, and Vaccinium angustifolium cover was found to be concentrated in 45cm radius plots beyond the first 15cm from the P. rubens stem. These findings reinforce a complex interplay between both the biotic and abiotic characteristics of a microsite and the successful germination and regeneration of a red spruce seedling in the heathland.<br>Master of Science
APA, Harvard, Vancouver, ISO, and other styles
3

Roberts, Jessica Jaye Edna. "Incorporating low relative humidity and low temperatures into tree nursery growing regimes, effects on white spruce seedling growth, morphology and physiology." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ34408.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Blomqvist, Göran. "De-icing salt and the roadside environment : Air-borne exposure, damage to Norway spruce and system monitoring." Doctoral thesis, KTH, Civil and Environmental Engineering, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3140.

Full text
Abstract:
<p>After decades of investigation, we still have to deal withthe problem of environmental effects of the use of de-icingsalt on roads. Lacking useful indicators of the system, westill do not know the environmental utility of ameliorativemeasures taken. The thesis aims at</p><p>i) describing the system of de-icing practices and theirenvironmental effects with special reference to the exposure ofthe roadside environment to air-borne salt and damage to Norwayspruce seedlings and ii) at proposing indicators for afollow-up system. By collecting bulk deposition and relatingthe deposition pattern to factors concerning wind androad-maintenance characteristics, the influence of thesefactors on air-borne exposure is investigated. By exposingNorway spruce (<i>Picea abies</i>(L.) Karst.) seedlings to roadsideconditions the influence ofsalt exposure on the degree ofdamage is investigated. Based on a comparison of severalsystems of monitoring, improvements are suggested by proposingnew indicators for salt use and its environmental effects.</p><p>A large part of the salt that is applied on the road surfacewill be transported by air and deposited on the ground in theroadside. While the vast majority of the salt will be depositedwithin some tens of metres of the road, some may still be windtransported several hundred metres away. The wind directionplays an important role for the deposition already at adistance of some ten metres from the road. Wind speedinfluences the distance to which the salt is transported.Chloride concentration in unwashed needles collected after thesalting season is positively related to the bulk deposition ofCl during the exposure. The degree of damage can be describedby a sigmoid curve of response to the Cl concentration inneedles. Improvements to the follow-up system are suggested byproposing indicators of the driving forces, pressures, states,impacts and possible responses as regards the undesired impactson water resources, vegetation and the roadside scenery as asocietal asset.</p><p><b>Keywords:</b>road, de-icing salt, air-borne, environmentalimpact, vegetation damage, Norway spruce, seedling, follow-up,monitoring, indicator</p>
APA, Harvard, Vancouver, ISO, and other styles
5

Holm, Boris. "Effekter av superabsorbent på granplantors överlevnad och tillväxt." Thesis, Linnéuniversitetet, Institutionen för skog och träteknik (SOT), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-33386.

Full text
Abstract:
Denna studie beskriver effekterna beträffande överlevnad och tillväxt hos gran (Picea abeis L. Karst) vid tillsats av superabsorbent Luquasorb 1280R i samband med plantering under olika betingelser. Plantor i form av täckrot och barrot studerades. Tillsats av superabsorbent visade sig ha en positiv inverkan på de studerade parametrarna i jämförelse med referensmaterial utan tillsats av superabsorbent. Detta visade sig särskilt vid extremförsök under tak utan tillgång till vattentillförsel under försöksperioden, förutom vattentillsats i samband med plantering.<br>This study describes the effects concerning survival and growth of Norway spruce seedelings (Picea abeis L. Karst) by addition of superabsorbent Luquasorb 1280R in connection with planting under differnt conditions. Container seedlings and bare-root seedlings were studied. The addition of superabsorbent showed a positive influence regarding the studied parameters in comparision with reference material without the addition of superabsorbent. This was most obvious at the the extreme test under roof without access to additional water during the test period, except water added in connection with planting.
APA, Harvard, Vancouver, ISO, and other styles
6

Bakke, Olaf Andreas. "Jack pine (Pinus banksiana Lamb.) pollen effects on jack pine and black spruce (Picea mariana (P. Mill.) B.S.P.) seed germination and seedling growth." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ42997.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Verbauskas, Žydrūnas. "Biohumuso įtaka paprastosios eglės sėjinukų augimui." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140616_132652-51294.

Full text
Abstract:
Magistro baigiamąjame darbe tiriamas biohumuso poveikis paprastųjų eglių (Picea abies (L.) Karst.) sėjinukų augimui atvirame grunte. Tyrimo objektas - vienerių metų paprastosios eglės sėjinukai. Tyrimų tikslas: nustatyti ekologiškos organinės trąšos - biohumuso įtaką paprastosios eglės sėjinukų augimui, vystymuisi, išlikimui, išeigai iš ploto vieneto, ekonominiam efektyvumui. Tyrimo metodai. Loginė mokslinės literatūros apžvalga, apskaitos aikštelių ir duomenų statistinio apdorojimo metodai. Darbo uždaviniai. Nustatyti biohumuso įtaką paprastosios eglės vienmečių sėjinukų augimui ir vystymuisi. Įvertinti vermikomposto įtaką sėjinukų išlikimui ir išeigai iš ploto vieneto. Atlikti biohumuso panaudojimo ekonominį įvertinimą. Darbo rezultatai. Paprastosios eglės vienamečių sėjinukų antžeminės dalies augimą, iš šešių tirtų biohumuso normų, labiausiai įtakojo 20 t/ha norma. Ji esmingai padidino sėjinukų aukštį, spyglių skaičių ir jų ilgį, o jos poveikis sėjinukų skersmeniui, šoninių ūglių skaičiui bei jų ilgiui, šoninių pumpurų skaičiui buvo analogiškas kaip ir mineralinių trąšų. Lyginant sėjinukų šaknų sistemas, biohumuso 10, 20 ir 30 t/ha normos patikimai padidino eglaičių pagrindinės šaknies ilgį (labiausiai – 20 t/ha), o pirmos eilės šoninių šaknų skaičių teigiamai įtakojo tik biohumuso 20 t/ha norma, palyginti su mineralinėmis trąšomis. Efektyviausiai sėjinukų bendrąją, antžeminės dalies ir šaknų masę padidino biohumuso 20 t/ha norma. Be to, biohumusas labiau skatino... [toliau žr. visą tekstą]<br>The effect of biohumus on the growth of the seedling of Norway spruce in the open soil is researched in this master thesis. The object of the research – the one year old seedling of Norway spruce. Research aim is to test the influence of biohumus on the growth, development, survival, amount of the seedling of Norway spruce from 1 hectare and its economikcal effect. Research methods. The review of logical scientific literature, the methods of statistic analysis of the data of the examined areas. Research objectives. To define the influence of biohumus on the growth and development of one year old seedling. To assess the influence of vermicompost on the seedling survival and harvest from one hectare. To perform the economical evaluation of the use of biohumus. Research results. The growth of a year old seedling from the six tested norms with biohumus was mostly influenced by 20 t/ha norm. It eesentially encreased the height of the seedling, the number and length of the needles. Its effect on the widh of the seedling, the number of the side branches, their length and the amount of the side buds was equivalent to the mineral fertilizers. By comparising the systems of the roots, the norms of biohumus 10, 20 and 30, evidentally encreased the length of the main roots of the Norway spruce (mostly 20 t/ha). However, the number of the side roots of the first row was positively effected only by the 20 t/ha norm if compared to the mineral fertilizers. The whole weight of the... [to full text]
APA, Harvard, Vancouver, ISO, and other styles
8

MacDonald, G. Blake. "Comparative responses of black spruce and jack pine seedlings to interspecific competition." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/30617.

Full text
Abstract:
Competition from non-crop vegetation decreases the productivity of conifer plantations across Canada. The objectives of this research were: (1) to develop reliable indices of perennial, interspecific competition; (2) to compare the responses of black spruce and jack pine seedlings to tree and brush competition in northern Ontario; and (3) to identify the silvicultural implications of the responses. An examination of potential components of a competition index considered measures based on hemispherical photographs, fractal geometry, stand maps, and mensurational data from 360 seedling-centred plots for each of the two crop species. Reliable competition indices should be simple formulations which include horizontal and vertical dimensions and which express the amount of competition relative to the size of the seedling. The optimum index was found to be the area of competing canopy on hemispherical photographs, relative to the seedling leaf area. An alternate index, requiring no elaborate equipment, was the sum of the competing stem volumes (relative to the seedling stem volume) of the largest competitor in each quadrant surrounding the seedling. Comparisons of crop tree responses were made using functional growth analysis, replacing the conventional time axis with a competition axis. The relationship between growth and competition was adequately modelled with a power exponential composite function. Jack pine and bare root stock of both species maintained superior growth despite greater sensitivities to competition, compared to black spruce and container stock, respectively. Thus, jack pine or bare root stock of black spruce would outperform the alternatives if tending were delayed, but competition should be removed in all cases to capture the maximum growth potential. The rate of growth decline in response to competition was consistently greatest at the lowest competition levels, indicating that no beneficial effect on growth was provided by a light cover of non-crop vegetation. Allometric analyses indicated that black spruce had a greater morphological plasticity than jack pine. At high competition levels black spruce allocated more biomass to branches and foliage, at the expense of stem and roots. Jack pine demonstrated no such adjustment in allocation pattern, but followed a strategy of stress avoidance through sustained high growth rates.<br>Forestry, Faculty of<br>Graduate
APA, Harvard, Vancouver, ISO, and other styles
9

Löwbeer, Emma, and Erik Åkesson. "Detection and tracking of spruce seedlings in spatiospectral images." Thesis, Linköpings universitet, Medie- och Informationsteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-170082.

Full text
Abstract:
I projektet detekteras och följs granplantor i spatiospektrala bilder för att därefter skapa en hyperspektral datakub för av varje gran. För att detektera granarna prövas fyra metoder: manuell detektion, detektion med segmentering, detektion med SVM och detektion med neuralt nätverk. Minnesanvändning och körningstid jämförs mellan två implementationer, där hyperspektral rekonstruktion görs med olika metoder.
APA, Harvard, Vancouver, ISO, and other styles
10

Heineman, Jeanette Lynne. "Growth of Interior spruce seedlings on forest floor materials." Thesis, University of British Columbia, 1991. http://hdl.handle.net/2429/29871.

Full text
Abstract:
On a site with a high water table and thick forest floor near Smithers, B.C., two year-old Interior spruce (Picea glauca (Moench) Voss X Picea engelmanni Parry) container seedlings were outplanted onto mineral soil, H-layer material, F-layer material, and rotten wood. Large and small screef sizes were utilized. Temperature and volumetric water contents of the various substrates were monitored over the 1989 growing season, and fertilization with NH₄NO₃ was carried out at the beginning of the 1990 growing season. Destructive sampling of the seedling population took place in August 1989 and August 1990 in order to determine height, root collar diameter, root mass, shoot mass, total seedling mass, and shoot to root ratio. Foliar N concentrations were also determined in late August 1990. Differences in height and diameter for the seven screef size/substrate treatments were not significant, but the organic substrates produced seedlings of greater root, shoot, and total seedling mass than did mineral soil. Greater seedling mass was correlated most strongly with higher substrate temperature, and to a lesser extent with lower soil moisture content, as well as with higher foliar N concentration. There were no significant differences in survival between the treatments. Seedlings growing in the organic substrates had higher foliar N levels, and fertilization improved growth for all parameters. It is concluded that on sites such as this, better growth results can be achieved by planting Interior spruce seedlings high above the water table in F-layer material, where conditions are warmer and drier, than by making deep screefs down to more traditionally acceptable planting substrates such as mineral soil or even the well decomposed H-layer material.<br>Forestry, Faculty of<br>Graduate
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Spruce seedling"

1

McCarthy, Ellen L. Exponential fertilization regimes for containerized black spruce seedling production. National Library of Canada = Bibliothèque nationale du Canada, 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Alexander, Robert R. Engelmann spruce seed production and dispersal and seedling establishment in the central Rocky Mountains. U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1986.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Alexander, Robert R. Engelmann spruce seed production and dispersal, and seedling establishment in the central Rocky Mountains. U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, 1986.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Odlum, K. D. Selecting greenhouse temperatures to control black spruce & jack pine seedling growth: Pocket guide. Ministry of Natural Resources, 1995.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

James, Robert L. Containerized Engelmann spruce seedling diseases at the USDA Forest Service Nursery, Coeur d'Alene, Idaho. USDA Forest Service, Northern Region, 1985.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

DeLong, C. Planting white spruce under trembling aspen: 7-year results of seedling condition and performance. British Columbia Ministry of Forests Research Program, 2000.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Levy, Louise. The density and distribution of Sitka spruce and western hemlock seedling banks in partially harvested stands in Southeast Alaska. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, 2010.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Ford, Randall Dana. Root growth potential assessment of twelve black spruce and jack pine seedling and clonal stock-lots. National Library of Canada, 1990.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Husted, Lynn Diane. Influence of soil temperature on the effectiveness of ectomycorrizal fungi in promoting white spruce seedling growth. Forestry Canada, 1990.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Oswald, E. T. Vegetation and seedling development following site preparation in the ESSFwm subzone of Glenogle Creek, Nelson Forest Region, British Columbia: A case study. Forestry Canada, 1992.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Spruce seedling"

1

Jentschke, Georg, and Douglas L. Godbold. "Metal Toxicity in Mycorrhizal Norway Spruce Seedlings." In Responses of Forest Ecosystems to Environmental Changes. Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2866-7_141.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Jentschke, Georg, and Douglas L. Godbold. "Metal Toxicity in Mycorrhizal Norway Spruce Seedlings." In Responses of Forest Ecosystems to Environmental Changes. Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2866-7_169.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Lee, H. S. J., M. Muray, L. Evans, et al. "Effects of elevated CO2 on Sitka spruce seedlings." In CO2 and biosphere. Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1797-5_38.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Godbold, D. L., G. Jentschke, and P. Marschner. "Solution pH modifies the response of Norway spruce seedlings to aluminium." In Plant-Soil Interactions at Low pH: Principles and Management. Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0221-6_49.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Roháček, Karel, and Pavel Šiffel. "Temperature and Light Dependences of Chlorophyll Fluorescence in Vivo for Norway Spruce Seedlings." In Photosynthesis: from Light to Biosphere. Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-009-0173-5_1132.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Kamachi, Hiroyuki, Hiroshi Inoue, Tatsuo Oku, Yuko Yamasaki, and Noriaki Tamura. "Photoactivation and Photoinhibition of the O2-Evolving Complex in Dark-Grown Spruce Seedlings." In Photosynthesis: Mechanisms and Effects. Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-3953-3_349.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Krasowski, M. J., T. Letchford, A. Caputa, and W. A. Bergerud. "Desiccation of White Spruce Seedlings Planted in the Southern Boreal Forest of British Columbia." In Boreal Forests and Global Change. Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-017-0942-2_15.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Godbold, D. L., and A. Hüttermann. "The Uptake and Toxicity of Mercury and Lead to Spruce (Picea Abies Karst.) Seedlings." In Acidic Precipitation. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-3385-9_161.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Krasowski, M. J., and J. N. Owens. "Tracheids in white spruce seedling’s long lateral roots in response to nitrogen availability." In The Supporting Roots of Trees and Woody Plants: Form, Function and Physiology. Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-017-3469-1_35.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Wang, Z., and A. Göttlein. "Rhizosphere chemistry and soil exploration by seedlings of beech and spruce in a rhizotrone experiment." In Plant Nutrition. Springer Netherlands, 2001. http://dx.doi.org/10.1007/0-306-47624-x_289.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Spruce seedling"

1

GRYBAUSKIENE, Vilda, and Gitana VYČIENĖ. "EVAPOTRANSPIRATION-BASED IRRIGATION SCHEDULING FOR PICEA ABIES (SPRUCE) SEEDLINGS." In Rural Development 2015. Aleksandras Stulginskis University, 2015. http://dx.doi.org/10.15544/rd.2015.062.

Full text
Abstract:
The water balance of agro ecological systems is a key parameter for most physical and physiological processes with the system soil–crop–climate. Therefore it is of great importance to calculate the water budget parameters in the required scale. The field study was conducted in the period of 2002–2005. Seedlings were planted in Irrigation engineering department experimental fields at the Lithuanian University of Agriculture. Seedlings were grown under standard nursery cultural practices until being transplanted into new fields in mid April 2002 and 2004. The research site contains evaporators and 8 lysimeters in which spruce seedlings were grown and studied. Lysimeters amount 42 m2 and 30 m2. At 2002, field No.1 was irrigated 8 times, irrigation norm was 250 m3 ha-1 and seedling got 2000 m3 ha-1 water. Field No.2 was irrigated 6 times, irrigation norm – 1500 m3 ha-1. In 2003 fields No. 1 and No. 2 were irrigated 4 times and seedlings got 1000 m3 ha-1 water. At 2004, field No.1 was irrigated 8 times, irrigation norm was 250 m3 ha-1 and seedling got 2000 m3 ha-1 water. Field No.2 was irrigated 6 irrigation norm – 1500 m3 ha-1. The total evapotranspiration of the first year seedlings planted in the field No.1 in 2004 made up 323 mm. The total evapotranspiration of the seedlings growing in variant No. 2 was 307 mm in 2004 and it is by 16 mm less as compared to variant No.1.
APA, Harvard, Vancouver, ISO, and other styles
2

Fukasawa, Yu, Yoko Ando, Satoshi Suzuki, et al. "A long-term impact of forest disturbance on spruce seedling regeneration on coarse woody debris." In 5th European Congress of Conservation Biology. Jyvaskyla University Open Science Centre, 2018. http://dx.doi.org/10.17011/conference/eccb2018/107752.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

KEMESIUS, Martynas, Gerda SILINGIENE, Regina VASINAUSKIENE, and Remigijus ZALKAUSKAS. "THE INFLUENCE OF SEWAGE SLUDGE ON NORWAY SPRUCE (PICEA ABIES (L.) H. KARST.) SEEDLINGS GROWTH." In Rural Development 2015. Aleksandras Stulginskis University, 2015. http://dx.doi.org/10.15544/rd.2015.079.

Full text
Abstract:
The usage of biodegradable waste as sewage sludge in a proper way for tree nurseries enable to seek for ecological, waste-less, alternative to mineral fertilization farming ways. The aim of this research is to investigate impact of sewage sludge fertilizers on Norway spruce (Picea abies) two years’ seedlings growth. Research has been done in 2013-2014 at Utena State Forest Enterprise nursery. The different fertilization rates (20, 40, 60, 80, 100 t/ha) of sewage sludge were investigated and compared with control – traditional fertilization with mineral fertilizers. The impact of sewage sludge was evaluated by seedlings biometric indicators, also dry mass of sample seedlings (medium seedlings by height and diameter). The bigger rates of sewage sludge showed almost better results in exception of seeds outlet. Sewage sludge has long lasting effect on seedlings growth and could successfully shift soil fertilization by mineral fertilizers. The obtained research results confirm the similar research carried out in 2011 in Rokiskis State Forest Enterprise nursery for first year Norway Spruce seedlings.
APA, Harvard, Vancouver, ISO, and other styles
4

Rahman, Noabur, Anthony Kimaro, and K. Salifu. "Response of aspen and white spruce seedlings to fertilisation on a reconstructed oil sands site in Alberta, Canada." In Eighth International Seminar on Mine Closure. Australian Centre for Geomechanics, Cornwall, 2013. http://dx.doi.org/10.36487/acg_rep/1352_31_noabur.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Spruce seedling"

1

Levy, Louise S. Y., Robert L. Deal, and John C. Tappeiner. The density and distribution of Sitka spruce and western hemlock seedling banks in partially harvested stands in southeast Alaska. U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 2010. http://dx.doi.org/10.2737/pnw-rp-585.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Zasada, John C., Peyton W. Owston, and Dennis Murphy. Field performance in southeast Alaska of sitka spruce seedlings produced at two nurseries. U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 1990. http://dx.doi.org/10.2737/pnw-rn-494.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Czapowskyj, Miroslaw M., Robert V. Rourke, Walter J. Grant, and Walter J. Grant. Growth and nutrient status of black spruce seedlings as affected by water table depth. U.S. Department of Agriculture, Forest Service, Northeastern Forest Experimental Station, 1986. http://dx.doi.org/10.2737/ne-rp-591.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Czapowskyj, Miroslaw M., Robert V. Rourke, Walter J. Grant, and Walter J. Grant. Growth and nutrient status of black spruce seedlings as affected by water table depth. U.S. Department of Agriculture, Forest Service, Northeastern Forest Experimental Station, 1986. http://dx.doi.org/10.2737/ne-rp-591.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Spruce seedling' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography