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Journal articles on the topic 'Reserve of nutrients'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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1

Bates, Terence R., Richard M. Dunst, and Paula Joy. "Seasonal Dry Matter, Starch, and Nutrient Distribution in 'Concord' Grapevine Roots." HortScience 37, no. 2 (2002): 313–16. http://dx.doi.org/10.21273/hortsci.37.2.313.

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Three-year-old field-grown 'Concord' (Vitis labruscana Bailey) grapevines were destructively harvested at eight growth stages during 1998 to quantify growth, carbohydrate distribution, and nutrient concentrations of different organs. The roots were the major storage organ for carbohydrates and nutrients, accounting for 84% of the starch and 75% of nitrogen stored in the vines at the beginning of the season. About 78% of the reserve starch in the vine was used for prebloom root and shoot growth. Early-season fine-root growth was a sink for stored vine nitrogen; however, the fine roots quickly b

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2

Hakl, J., J. Šantrůček, D. Kocourková, and P. Fuksa. "The effect of the soil compaction on the contents of alfalfa root reserve nutrients in relation to the stand density and the amount of root biomass." Soil and Water Research 2, No. 2 (2008): 54–58. http://dx.doi.org/10.17221/2117-swr.

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The reserve root nutrients influence the overwintering, regrowth, yield, and persistence of alfalfa plants. The total amount of the root reserves is considered more important than their concentration. One of the factors which can affect the reserve content can be the soil compaction. The aim of this study is to clarify the effect of the soil compaction on the reserve root nutrients in relation to the stand density and the amount of the root biomass. In this experiment, the stand density ranged from 28 to 112 plants per m<sup>2</sup>. The average soil bulk density in the uncompacted

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3

Slot, Martijn, Danielle T. Palow, and Kaoru Kitajima. "Seed reserve dependency of Leucaena leucocephala seedling growth for nitrogen and phosphorus." Functional Plant Biology 40, no. 3 (2013): 244. http://dx.doi.org/10.1071/fp12255.

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Mineral elements stored in seed reserves meet the nutrient demands of seedlings during their initial development and growth. We experimentally examined when seed reserves become insufficient to meet demands for nitrogen (N) and phosphorus (P) of seedlings of Leucaena leucocephala (Lam.) de Wit, a tropical woody legume. Seedlings were grown from seeds with four nutrient treatments: receiving all nutrients; all nutrients except N, all nutrients except P or deionised water. Growth curves were compared to quantify the time course of the onset of N and P deficiency during 8 weeks. N deficiency beca

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4

Petrie, Scott A., and Kevin H. Rogers. "Nutrient-reserve dynamics of semiarid-breeding White-faced Whistling Ducks: a north-temperate contrast." Canadian Journal of Zoology 82, no. 7 (2004): 1082–90. http://dx.doi.org/10.1139/z04-085.

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Little is known about the nutrient-reserve dynamics of waterfowl that breed in semiarid environments. Breeding White-faced Whistling Ducks, Dendrocygna viduata (L., 1766), were collected on the Nyl River floodplain, South Africa, during 1992–1993 and 1995. Mass of major lipid (wet skin + visceral fat + abdominal fat) and protein (breast muscle + leg muscle + gizzard) deposits and organs of males and females were evaluated in relation to sex and reproductive stage. Both sexes arrived at breeding areas with large lipid reserves and did not store additional lipid after arrival. Stored reserves en

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5

Januar, Hedi Indra, Asri Pratitis, and Rini Susilowati. "Statistical multi-metric based eutrophication index: Case of study at Batam Marine Reserve Park." ILMU KELAUTAN: Indonesian Journal of Marine Sciences 24, no. 4 (2019): 164. http://dx.doi.org/10.14710/ik.ijms.24.4.164-170.

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Excessive human waste nutrients, which usually consist of nitrogenous and phosphate compounds, are known as the major environmental stresses in coastal waters. Therefore, monitoring of nutrients level is very important in marine reserve park. This study presents an application of multi-metric index in accessing the spatial and temporal level of a nutrient in surface water at Batam City Marine Reserve Park, Indonesia. Research had been done with seasonal and spatial zones on three major islands namely Petong, Abang, and Dedep. Water samples from each station were taken from the surface water. P

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6

Zhang, Shuangshuang, Jin Wei, Yiping Li, Maoqing Duan, Amechi S. Nwankwegu, and Eyram Norgbey. "The Influence of Seasonal Water Level Fluctuations on the Soil Nutrients in a Typical Wetland Reserve in Poyang Lake, China." Sustainability 13, no. 7 (2021): 3846. http://dx.doi.org/10.3390/su13073846.

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To comprehend the distribution characteristics of the nutrients and the variations in the soil fertility, a total of 23 samples were collected from Nanjishan wetland reserve in the dry season, wet season, and water-recession season. The study area was divided into four areas (A1, A2, A3, and A4) based on the local hydrological conditions, geographical locations, and nutrient load characteristics. The findings showed that the highest concentration of nutrients appeared in A1, followed by A2 due to anthropogenic activities and the sewage discharge along Ganjiang River. Except for the total amoun

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7

Weber, E., and H. J. Ehrlein. "Reserve capacities of the small intestine for absorption of energy." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 275, no. 1 (1998): R300—R307. http://dx.doi.org/10.1152/ajpregu.1998.275.1.r300.

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Previous in vitro studies showed that the small intestine has reserve capacities for absorption of nutrients. However, the size of the reserve capacity is controversial. Therefore, we measured the intestinal capacity for absorption of energy in relation to the postprandial gastric delivery of energy into the gut. In minipigs, a 150-cm length of jejunum was perfused (1–8 kcal/min) with four nutrient solutions containing 60% of energy as carbohydrate, protein, and fat, respectively, or containing 33.3% of each nutrient. In separate experiments, gastric delivery of energy to the jejunum was measu

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8

Ralte, Vanlalhruaii. "Effect of coal mining on soil physico-chemical properties of Nokrek Biosphere Reserve of Meghalaya, northeastern India." Science Vision 17, no. 4 (2017): 228–37. http://dx.doi.org/10.33493/scivis.17.04.07.

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Mining causes massive damage to landscape and biological components of an ecosystem. Due to extensive and unmanaged coal mining in the southern part of Nokrek Biosphere Reserve of Meghalaya, the area has been turned into degraded land since nutrient deficient sandy spoils are hostile for the growth and regeneration of plant communities. Soil is sandy to sandy loam and red, brown to dark brown in colour. The physico-chemical properties of the soil were greatly affected due to coal mining. There is an increased acidity i.e. from 6.00 in the undisturbed forest (control site) to 3.50 in the coal m

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9

Songwe, Nicholas C., F. E. Fasehun, and D. U. U. Okali. "Leaf nutrient dynamics of two tree species and litter nutrient content in Southern Bakundu Forest Reserve, Cameroon." Journal of Tropical Ecology 13, no. 1 (1997): 1–15. http://dx.doi.org/10.1017/s026646740001021x.

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ABSTRACTThe variations in macronutrient concentrations of the leaves of Terminalia superba and Pycanthus angolensis were studied and the concentrations of nutrients in leaves before abscission were compared with those after abscission. The amounts of nutrients returned to the forest floor were also computed from litter fall data at the start of maximum annual fall in the Reserve. With the exception of potassium in Pycanthus angolensis, there were significant variations in the nutrient concentrations of the two species with the time of year. With increasing leaf age the concentration of nitroge

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10

Esler, Daniel, James B. Grand, and Alan D. Afton. "Intraspecific Variation in Nutrient Reserve Use During Clutch Formation by Lesser Scaup." Condor 103, no. 4 (2001): 810–20. http://dx.doi.org/10.1093/condor/103.4.810.

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AbstractWe studied nutrient reserve dynamics of female Lesser Scaup (Aythya affinis) to identify sources of intraspecific variation in strategies of nutrient acquisition for meeting the high nutritional and energetic costs of egg formation. We collected data from interior Alaska and combined these with data for Lesser Scaup from midcontinent breeding areas (Afton and Ankney 1991), allowing a rangewide analysis for the species. We found little evidence that nutrient reserve use differed between Alaskan and midcontinent Lesser Scaup, except that subarctic birds used a small amount of protein res

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11

Baillie, I. C., P. S. Ashton, S. P. Chin, et al. "Spatial associations of humus, nutrients and soils in mixed dipterocarp forest at Lambir, Sarawak, Malaysian Borneo." Journal of Tropical Ecology 22, no. 5 (2006): 543–53. http://dx.doi.org/10.1017/s026646740600352x.

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Discrete humus layers are common on podzols under temperate coniferous and tropical heath forests, and patchy layers also occur under some temperate broadleaved forests on non-podzolic soils. We used multiple data sets to test the reported association of humus with oligotrophic but non-podzolic soils under non-heath dipterocarp forest at Lambir, Sarawak. We examined the distribution, morphology and nutrient dynamics of necromass on soils derived from sandstone and shale. Concentrations of the main mineral nutrients were lower in fresh litter on the very oligotrophic sandstone soils than on sha

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12

Meney, KA, JS Pate, and KW Dixon. "Phenology of Growth and Resource Deployment in Alexgeorgea nitens (Nees) Johnson and Briggs (Restionaceae), a Clonal Species From South-Western Western Australia." Australian Journal of Botany 38, no. 6 (1990): 543. http://dx.doi.org/10.1071/bt9900543.

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Seasonal patterns are described for growth and partitioning of dry matter and selected nutrients between different age classes and types of plant organs of ramets of non-reproductive, presumed female clones of Alexgeorgea nitens in native sandplain habitat at Eneabba, south-western Western Australia. New rhizome extension and associated production of new culms and nodal roots are initiated following onset of rain in autumn. Rate of growth of these parts remains slow through winter, peaks in spring and early summer and then becomes much reduced in the hot, dry summer. The bulk (87%) of the seas

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13

Miyanishi, Kiyoko, and Martin Kellman. "The role of root nutrient reserves in regrowth of two savanna shrubs." Canadian Journal of Botany 64, no. 6 (1986): 1244–48. http://dx.doi.org/10.1139/b86-171.

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The critical nutrient(s) limiting vegetative regrowth following shoot destruction by burning or cutting were identified in two neotropical savanna shrubs, Miconia albicans and Clidemia sericea, growing in the Mountain Pine Ridge Forest Reserve, Belize. Only starch, and not Ca, Mg, K, or P, was significantly depleted in the roots of these shrubs after both a single burn and repeated annual burns. Phosphorus was depleted only after repeated burns, while the other mineral nutrients showed no significant decline. In roots that failed to sprout following repeated shoot cuttings at 2-month intervals

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14

Laflamme, Marc, Lija I. Flude, and Guy M. Narbonne. "Ecological tiering and the evolution of a stem: the oldest stemmed frond from the Ediacaran of Newfoundland, Canada." Journal of Paleontology 86, no. 2 (2012): 193–200. http://dx.doi.org/10.1666/11-044.1.

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The ecological segregation of large, multicellular eukaryotes in the Ediacaran in response to competitive feeding results in the evolution of novel morphological adaptations such as sturdy stems to elevate above lower-tier feeding guilds. Culmofrons plumosa n. gen. n. sp. lived attached to the ocean floor and probably fed osmotrophically from dissolved organic nutrients in the water column. Competition for nutrients with specialized lower-tiered organisms resulted in the evolution of a specialized non-feeding structure, drastically expanding the functional morphospace available to Ediacaran ra

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15

Bezerra Lopes, José Fredson, Eunice Maia Andrade, Lindbergue Araújo Crisóstomo, and Meilla Marielle Araújo Rodrigues. "Potential for nutrient contribution from litter in a seasonally dry forest." REVISTA AGRO@MBIENTE ON-LINE 11, no. 4 (2017): 269. http://dx.doi.org/10.18227/1982-8470ragro.v11i4.4563.

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Litter is the most important way of transferring essential elements from vegetation to the soil. This is due to nutrient cycling, a process by which decomposition of the litter adds nutrients to the soil. An understanding of this process goes beyond the need for knowledge of nutrient dynamics, since it is a question of understanding the way in which ecosystems function in the search for a correct use of natural resources. The aim of this study was to quantify the average concentrations of the following nutrients: Nitrogen (N), phosphorus (P), Potassium (K), and Or

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16

Heaney, Robert P. "Calcium intake and disease prevention." Arquivos Brasileiros de Endocrinologia & Metabologia 50, no. 4 (2006): 685–93. http://dx.doi.org/10.1590/s0004-27302006000400014.

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While the fundamental metabolic function of calcium is to serve as a second messenger, coupling intracellular responses to extracellular signals, nutritional deficiency of calcium is manifested at a higher level of organization: 1) depletion of the calcium nutrient reserve; 2) inadequate complexation of digestive byproducts; and 3) collateral effects of hormones produced primarily to compensate for low calcium intake. The first mechanism contributes to the osteoporosis problem, the second to kidney stones and colon cancer, and the third to hypertension, preeclampsia, obesity, and insulin resis

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17

Jales, Marina Cavalcanti, Fernando Antônio do Nascimento Feitosa, Maria Luise Koening, Manuel de Jesus Flores Montes, Moacyr Cunha de Araújo Filho, and Rodolfo Araújo da Silva. "Phytoplankton biomass dynamics and environmental variables around the Rocas Atoll Biological Reserve, South Atlantic." Brazilian Journal of Oceanography 63, no. 4 (2015): 443–54. http://dx.doi.org/10.1590/s1679-87592015093906304.

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Abstract The Rocas Atoll Biological Reserve is located in the Atlantic Ocean, at 3º 51' S and 33º 49' W. It lies 143 nautical miles from the City of Natal, Rio Grande do Norte (Brazil). The purpose of this study was to analyze the hydrology, water masses, currents and chlorophyll a content to determine the dynamics of phytoplankton biomass around the Rocas Atoll. Samples were collected in July 2010 in the area around the Atoll, using the Research Vessel Cruzeiro do Sul of the Brazilian Navy. Two transects were established according to the surface currents, one of which at the southeast of the

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18

Azeredo, Luane Maria Melo, Monique Silva Ximenes, Kleytone Alves Pereira, Maria Paula Aguiar Fracasso, and Luiz Carlos Serramo Lopez. "Body mass index and glucose variations during the night in free-ranging Artibeus planirostris (Chiroptera: Phyllostomidae)." Zoologia 36 (May 28, 2019): 1–8. http://dx.doi.org/10.3897/zoologia.36.e28027.

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Body condition is an important measure to estimate the energy reserve of an organism. Scientists frequently use body condition indices (BCIs) with morphometric measures but direct measurements, such as blood glucose, seem to be more reliable. We observed oscillations in the body condition and glucose indexes of individuals of Artibeusplanirostris (Spix, 1823) during 13 nights in the field. We assume that if glucose levels are proportional to feeding state and body condition is a measure of energy reserve, blood glucose and BCI should be positively correlated and both are expected to increase d

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19

Rai, Prakash, Vineeta, Gopal Shukla, et al. "Carbon Storage of Single Tree and Mixed Tree Dominant Species Stands in a Reserve Forest—Case Study of the Eastern Sub-Himalayan Region of India." Land 10, no. 4 (2021): 435. http://dx.doi.org/10.3390/land10040435.

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In recent decades, carbon (C) management is an important point on the agenda to identify the best viable mitigation strategies for its reduction. The study was conducted at Jaldapara National Park located in the Eastern Himalayan region of India. The study quantified litter production, decomposition, periodic nutrient release, soil fertility status, and soil organic carbon (SOC) of five major forest stands i.e., Tectona grandis (TGDS), Shorea robusta (SRDS), Michelia champaca (MCDS), Lagerstroemia parviflora (LPDS) and miscellaneous stand (MS). A stratified random nested quadrate method was ad

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20

Lizotte, Richard E., Lindsey M. W. Yasarer, Ronald L. Bingner, Martin A. Locke, and Scott S. Knight. "Long-Term Oxbow Lake Trophic State under Agricultural Best Management Practices." Water 13, no. 8 (2021): 1123. http://dx.doi.org/10.3390/w13081123.

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A key principle of agricultural best management practices (BMPs) is to improve water quality by reducing agricultural-sourced nutrients and associated eutrophication. Long-term (1998–2016) lake summer trophic state index (TSI) trends of an agricultural watershed with agricultural best management practices (BMPs) were assessed. Structural BMPs included vegetative buffers, conservation tillage, conservation reserve, a constructed wetland, and a sediment retention pond. TSI included Secchi visibility (SD), chlorophyll a (Chl), total phosphorus (TP), and total nitrogen (TN). Summer TSI 1977 was &g

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21

Xu, Youze, Guangyi Fu, Nan Tang, Zhonghao He, Lincheng Jian, and Yuanyuan Zhao. "Distribution of Triarrhena lutarioriparia and its reserve characteristics of nitrogen and phosphorus in Dongting Lake." E3S Web of Conferences 237 (2021): 01004. http://dx.doi.org/10.1051/e3sconf/202123701004.

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Triarrhena lutarioriparia, a typical and most abundant macrophyte in Dongting lake wetland, was in the state of abandonment following the papermaking industry revocation in the lake basin. In order to provide scientific basis for precise management of T. lutarioriparia, the T. lutarioriparia distribution charateristics in Dongting Lake and its storage characteristics of nutrients were investigated in this study. Remote sensing interpretation results showed that the total area of T. lutarioriparia in Dongting Lake wetland was 58, 450 ha, 48.31% of which distributed in South Doting Lake wetlands

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22

Arévalo, J. R., S. Fernández-Lugo, A. Naranjo-Cigala, et al. "Post-fire recovery of an endemic Canarian pine forest." International Journal of Wildland Fire 23, no. 3 (2014): 403. http://dx.doi.org/10.1071/wf13055.

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In this study, we analysed the effect of a wildfire that occurred in 2007 in a well-preserved Canarian pine forest located in the ‘Integral Natural Reserve of Inagua’. This reserve has the highest level of protection of the Canarian Network of Natural Protected Areas. In 2009, we established in an area that was affected by fire in the central part of the reserve a grid of quadrats of 500×500m in size. Following the corners of the quadrats, we set up a network of 28 permanent square plots of 25×25m. Ten more plots were randomly located in a surrounding area unaffected by the fire, with similar

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23

Chen, Yueqin, Qiuyang Song, Ling Pan, et al. "Trace metals, organic carbon and nutrients in the Beidagang Wetland Nature Reserve, northern China." PLOS ONE 13, no. 10 (2018): e0204812. http://dx.doi.org/10.1371/journal.pone.0204812.

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24

Nwachukwu, C. U. "Review article: Nutritional effects on fetal development during gestation in ruminants." Nigerian Journal of Animal Production 47, no. 2 (2020): 245–56. http://dx.doi.org/10.51791/njap.v47i2.184.

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Intrauterine growth retardation is a massive problem in animal production as it influencesthe body composition, carcass quality, and impairs health. This condition can lead to areduction in neonatal survival, growth, feed efficiency utilisation, and future production bythe animals. Pregnancy may negatively influence maternal nutritional status because ofincreased uteroplacental blood flow, nutrient mobilisation, and transfer of nutrients from thedam to the fetus. The critical factor for fetal survival and health is an adequate nutrient andoxygen supply to the dam during gestation. This ability

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25

Mojzeš, Peter, Lu Gao, Tatiana Ismagulova, et al. "Guanine, a high-capacity and rapid-turnover nitrogen reserve in microalgal cells." Proceedings of the National Academy of Sciences 117, no. 51 (2020): 32722–30. http://dx.doi.org/10.1073/pnas.2005460117.

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Nitrogen (N) is an essential macronutrient for microalgae, influencing their productivity, composition, and growth dynamics. Despite the dramatic consequences of N starvation, many free-living and endosymbiotic microalgae thrive in N-poor and N-fluctuating environments, giving rise to questions about the existence and nature of their long-term N reserves. Our understanding of these processes requires a unequivocal identification of the N reserves in microalgal cells as well as their turnover kinetics and subcellular localization. Herein, we identified crystalline guanine as the enigmatic large

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Timmer, V. R., and Y. Teng. "Pretransplant fertilization of containerized Picea mariana seedlings: calibration and bioassay growth response." Canadian Journal of Forest Research 34, no. 10 (2004): 2089–98. http://dx.doi.org/10.1139/x04-088.

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The role of the root plug as a nutrient source for newly planted seedlings was evaluated for one growing season on soil bioassays retrieved from a boreal forest site. Intact (control) and bare-rooted (peat plug removed) black spruce (Picea mariana (Mill.) B.S.P.) seedlings reared in Jiffy pellets, some fertilized before ("spiked" with 60 mg N) or after (topdressed with 300 mg N) planting, were transplanted to potted soil blocks (bioassays) under greenhouse conditions. Compared with the intact control, bare-rooting alone reduced plant dry mass (16%) and N, P, and K (15%25%) uptake, but increas

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Noumi, Zouhaier, Lotfi Abdallah, Blaise Touzard, and Mohamed Chaieb. "Acacia tortilis (Forssk.) subsp. raddiana (Savi) Brenan as a foundation species: a test from the arid zone of Tunisia." Rangeland Journal 34, no. 1 (2012): 17. http://dx.doi.org/10.1071/rj11053.

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The geographic distribution of Acacia tortilis (Forssk.) Hayne subsp. raddiana (Savi) Brenan in Tunisia, is limited to the Bou-Hedma region (Bled Talah) where the National Park of Bou-Hedma, a UNESCO (1986) biosphere reserve, is located. We have tested the hypothesis that A. tortilis acts as a foundation species as a result of the improvement of soil conditions under its canopy (soil water availability and nutrient enrichment). The herbaceous community (floristic composition, species density, species richness) and soil characteristics (soil nutrients and soil water) were sampled using the quad

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28

Lawson, A. R., K. B. Kelly, and P. W. G. Sale. "Defoliation frequency and cultivar effects on the storage and utilisation of stolon and root reserves in white clover." Australian Journal of Agricultural Research 51, no. 8 (2000): 1039. http://dx.doi.org/10.1071/ar00039.

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The effects of defoliation frequency (2 or 6 defoliations over a 91-day period) on the reserve status and growth rate of 2 white clover cultivars, cvv. Irrigation (medium-leafed) and Haifa (large-leafed), were examined over the final 42 days of the defoliation treatments. The clover plants consisted of single stolons growing in a sand/scoria mix in an unheated glasshouse, and were fertilised weekly with a solution containing essential nutrients excluding nitrogen. More frequent defoliation reduced the leaf appearance rate, stolon elongation rate, and plant size, and increased stolon death, wit

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29

Xia, Guohai, and Lailiang Cheng. "(334) Fruit Set and Yield in Relation to Reserve Nitrogen and Reserve Carbohydrates in `Gala' Apple Trees." HortScience 40, no. 4 (2005): 1083B—1083. http://dx.doi.org/10.21273/hortsci.40.4.1083b.

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Four-year-old `Gala'/M.26 trees were grown under low (2.5 mm), medium (12.5 mm), or high (25 mm) N supply with balanced nutrients in sand culture and the cropload was adjusted to 5 fruit/cm2 trunk cross-sectional area at 10 mm king fruit. After harvesting, half of the trees in each N treatment were sprayed twice with 3% urea a week apart in late September. Before budbreak the following spring, four trees from each treatment combination were destructively sampled for reserve nitrogen and carbohydrate analysis. Foliar urea application significantly increased tree N concentration and concentratio

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Ojo, AF, O. Kadeba, and J. Kayode. "Fluxes in litter decomposition in three selected indigenous species and teak in a converted rainforest ecosystem in southwestern Nigeria." Bangladesh Journal of Scientific and Industrial Research 47, no. 3 (2012): 333–38. http://dx.doi.org/10.3329/bjsir.v47i3.13069.

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The study investigated the rate of litter decomposition in three prominent litter releasing indigenous tree species in the natural rainforest and an exotic species Teak, Tectona grandis Lim., in the adjacent plantation in Akure forest reserve, southwestern Nigeria. Results showed that teak had the highest litter decomposition rate and Mansonia altissima the least. There was no relationship between the rates of decomposition among all species examined. The implication is that teak litter had the highest probability of releasing litter nutrients into the soil nutrient pool than any of the select

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Yaacob, Nor Suhaila, Mohd Fadzli Ahmad, Nobuyuki Kawasaki, et al. "Kinetics Growth and Recovery of Valuable Nutrients from Selangor Peat Swamp and Pristine Forest Soils Using Different Extraction Methods as Potential Microalgae Growth Enhancers." Molecules 26, no. 3 (2021): 653. http://dx.doi.org/10.3390/molecules26030653.

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Soil extracts are useful nutrients to enhance the growth of microalgae. Therefore, the present study attempts for the use of virgin soils from Peninsular Malaysia as growth enhancer. Soils collected from Raja Musa Forest Reserve (RMFR) and Ayer Hitam Forest Reserve (AHFR) were treated using different extraction methods. The total dissolved nitrogen (TDN), total dissolved phosphorus (TDP), and dissolved organic carbon (DOC) concentrations in the autoclave methods were relatively higher than natural extraction with up to 132.0 mg N/L, 10.7 mg P/L, and 2629 mg C/L, respectively for RMFR. The resu

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32

Ben-Shahar, Raphael. "Soil nutrients distribution and moisture dynamics on upper catena in a semi-arid nature reserve." Vegetatio 89, no. 1 (1990): 69–77. http://dx.doi.org/10.1007/bf00134435.

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Yang, Jia Cheng, and Heribert Insam. "Microbial biomass and relative contributions of bacteria and fungi in soil beneath tropical rain forest, Hainan Island, China." Journal of Tropical Ecology 7, no. 3 (1991): 385–93. http://dx.doi.org/10.1017/s0266467400005678.

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ABSTRACTSoil microbial biomass (Cmic.) and is relation with soil carbon and nutrient contents in a tropical rain forest (Bawangling Nature Reserve, Hainan Island, P.R. China) were studied. Cmic. was determined by the substrate induced respiration (Sir) method; bacterial and fungal fractions were measured using a selective inhibition technique. For the A horizon, Cmic ranged between 350 and 700μgg-1 soil in April (beginning of the rainy season) and 250–600μg g-1 in October (end of the rainy season). Cmic. contents of the AB and B horizons were lower, ranging from 80 to 350 μg Cmic g-1 soil. On

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Karmakar, Soham, Lu Deng, Xi C. He, and Linheng Li. "Intestinal epithelial regeneration: active versus reserve stem cells and plasticity mechanisms." American Journal of Physiology-Gastrointestinal and Liver Physiology 318, no. 4 (2020): G796—G802. http://dx.doi.org/10.1152/ajpgi.00126.2019.

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The gastrointestinal system is arguably one of the most complicated developmental systems in a multicellular organism, as it carries out at least four major functions: digestion of food, absorption of nutrients, excretion of hormones, and defense against pathogens. Anatomically, the fetal gut has a tubular structure with an outer layer of smooth muscle derived from lateral splanchnic mesoderm and an inner lining of epithelium derived from the definitive endoderm. During morphogenesis of the gut tube, the definitive endoderm transforms into a primitive gut tube with a foregut, midgut, and hindg

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Bell, TL, and JS Pate. "Growth and Fire Response of Selected Epacridaceae of South-Western Australia." Australian Journal of Botany 44, no. 5 (1996): 509. http://dx.doi.org/10.1071/bt9960509.

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Recruiting populations of seeder (Astroloma xerophyllum (DC.) Sond. and Leucopogon conostephioides DC.) and resprouter (Leucopogon verticillatus R.Br. and Conostephium pendulum. Benth.) epacrids were examined over an 8 year period, using time of fire, shoot morphology and root xylem ring number to age plants. The seeders commenced flowering earlier, achieved three-fold higher shoot:root ratios but accumulated much smaller root starch reserves than the resprouters. The resprouting potential of L. verticillatus was 'bud initiation-limited', since progressive shoot removal exhausted the bud-produ

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Carmichael, Jeffrey S., and Sarena M. Selbo. "Ovule, embryo sac, embryo, and endosperm development in leafy spurge (Euphorbia esula)." Canadian Journal of Botany 77, no. 4 (1999): 599–610. http://dx.doi.org/10.1139/b99-020.

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Leafy spurge (Euphorbia esula L.) is a noxious, invasive weed that dominates many agriculturally important regions. While many research efforts are currently aimed at controlling the spread of this plant, relatively little is known about its sexual reproductive biology, especially from a structural perspective. This report describes key features of ovule development, embryogenesis, and endosperm formation in leafy spurge. Ovules are anatropous, bitegmic, and form a zigzag micropyle. A distinct elaisome (caruncle) and hypostase are formed as ovules mature. Obturators are present and are derived

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Nilsson, Marie-Charlotte, Ingeborg Steijlen, and Olle Zackrisson. "Time-restricted seed regeneration of Scots pine in sites dominated by feather moss after clear-cutting." Canadian Journal of Forest Research 26, no. 6 (1996): 945–53. http://dx.doi.org/10.1139/x26-104.

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Scots pine (Pinussylvestris L.) were selectively seeded in 1990, 1991, 1992, and 1994 in bottom layer vegetation of Pleuroziumschreberi (Bird.) Mitt, in a clearcut created in 1989 and in an adjacent undisturbed Scots pine forest of Vaccinium type, in northern Sweden. Seedlings from the 1990 seeding established considerably better on the clearcut than in the forest. In contrast, seeding done in 1991, 1992, and 1994 gave no significant difference in seedling establishment between the two sites. Seedlings that established in the clearcut in 1990 grew significantly larger and had a higher content

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陈, 世豪. "Research on Spatial Distribution Characteristics of Forest Soil Mass Nutrients in Feixian Daqingshan Provincial Nature Reserve." Hans Journal of Soil Science 07, no. 03 (2019): 242–50. http://dx.doi.org/10.12677/hjss.2019.73030.

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Veselý, Pavel. "Dynamic contents of energy and organic nutrient in steppe growths of the Mohelenská Serpentine Steppe National Nature Reserve." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 54, no. 4 (2006): 117–30. http://dx.doi.org/10.11118/actaun200654040117.

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The aim of the study was to determine the dynamics in the content of organic nutrients, ash and energy in dry matter of growths within the Mohelenská Serpentine Steppe National Nature Reserve (NPR), and to document their initial nutritive value before the intended grazing. Plant samples in 1995 and 1996 during the growing season in 14-days intervals from the area of 3 × 1 m2. Amounts of dry matter, fibre, nitrogen substances, fat and ashes were determined in growths according to the ANONYM (2001). Nitrogen-free extract substances (BNLV) were determined by final calculating; BE, ME, NEL, NEV, P

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Darriba, Susana, Fuencisla San Juan, and Alejandro Guerra. "Energy storage and utilization in relation to the reproductive cycle in the razor clam Ensis arcuatus (Jeffreys, 1865)." ICES Journal of Marine Science 62, no. 5 (2005): 886–96. http://dx.doi.org/10.1016/j.icesjms.2005.02.010.

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Abstract Seasonal changes in condition indices and biochemical components of the digestive gland, anterior adductor muscle, foot, and gonad of Ensis arcuatus (Jeffreys, 1865) were analysed from February 1998 to June 1999 in relation to environmental conditions and reproductive events. During summer, E. arcuatus accumulated lipids, particularly triacylglycerols, in the digestive gland and glycogen in the anterior adductor muscle and foot while the gonad was in sexual rest. Phytoplankton blooms caused by the upwelling of cold waters, rich in nutrients, from offshore are responsible for the high

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C.M, Ganesan, Ravichandran R, Deepthi R, and Paulsamy S. "WINE PRODUCTION IN WILD FRUITS OF OPENTIA STRICTAHAW." Kongunadu Research Journal 2, no. 1 (2015): 65–70. http://dx.doi.org/10.26524/krj70.

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The present study was attempted for using the wild species present in Nilgiri Biosphere Reserve, the Western Ghats for wine production. A wild species Opuntia stricta has been identified as an alternative source of grapes for wine production. The results of the study report that the carbohydrate content (sugar and pecticsubstances) was higher in the fruits and it was comparable to that of grapes. The various kinds of minerals, vitamins and other nutrients are also found to be higher in this species. This enriched status of nutrients provide favourable environment for the fermentation of carboh

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Mascareñas, Doreen, Roy de Leon, and Efren Delos Reyes. "Watershed and Pahu-anCave Stream Interconnectivity in Bonliw, Torrijos, Marinduque, Philippines." Environments 6, no. 2 (2019): 11. http://dx.doi.org/10.3390/environments6020011.

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Marinduque Island is characterized as having a karst landscape with caves having underground streams harboring a variety of freshwater organisms including freshwater shrimps which are dependent on the quality of the forest and watershed. This study aimed to characterize the forest cover overlying the cave, siltation/sedimentation rate in the surface and cave streams, nutrient contents (ammonium, phosphate. and sulfate) of the sediment and water, and freshwater shrimps and phytoplanktons present in both streams. Results of the assessment indicate that the surface stream and the cave stream in t

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Cheng, Lailiang, and Richard Raba. "Accumulation of Macro- and Micronutrients and Nitrogen Demand-supply Relationship of ‘Gala’/‘Malling 26’ Apple Trees Grown in Sand Culture." Journal of the American Society for Horticultural Science 134, no. 1 (2009): 3–13. http://dx.doi.org/10.21273/jashs.134.1.3.

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Six-year-old ‘Gala’/‘Malling26’ (‘M.26’) apple (Malus ×domestica Borkh.) trees grown in sand culture were provided with a total of 30 g of N per tree as enriched 15N-NH4NO3 in Hoagland's solution via fertigation to determine the magnitude and seasonal patterns of accumulation of macro- and micronutrients and the demand-supply relationship of N. Crop load was adjusted to 8.2 fruit/cm2 trunk cross-sectional area, at king fruit diameter of 10 mm by hand-thinning. At each of seven key developmental stages throughout one annual growth cycle, four trees were excavated and destructively sampled for c

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Sagot, Isabelle, Benoît Pinson, Bénédicte Salin, and Bertrand Daignan-Fornier. "Actin Bodies in Yeast Quiescent Cells: An Immediately Available Actin Reserve?" Molecular Biology of the Cell 17, no. 11 (2006): 4645–55. http://dx.doi.org/10.1091/mbc.e06-04-0282.

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Most eukaryotic cells spend most of their life in a quiescent state, poised to respond to specific signals to proliferate. In Saccharomyces cerevisiae, entry into and exit from quiescence are dependent only on the availability of nutrients in the environment. The transition from quiescence to proliferation requires not only drastic metabolic changes but also a complete remodeling of various cellular structures. Here, we describe an actin cytoskeleton organization specific of the yeast quiescent state. When cells cease to divide, actin is reorganized into structures that we named “actin bodies.

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Gardner, L. R., and B. Kjerfve. "Tidal fluxes of nutrients and suspended sediments at the North Inlet–Winyah Bay National Estuarine Research Reserve." Estuarine, Coastal and Shelf Science 70, no. 4 (2006): 682–92. http://dx.doi.org/10.1016/j.ecss.2006.06.034.

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Korzhenevskaya, Yu V. "Ecological structure of the briphytes of the "Cape Martyan" Nature Reserve." Scientific notes of the “Cape Martyan” Nature Reserve, no. 11 (December 7, 2020): 74–82. http://dx.doi.org/10.36305/2413-3019-2020-11-74-82.

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The bryophytes of the reserve are represented by 71 species: 3 liverworts and 68 leafy mosses. The greatest variety of mosses is typical for forests. Most mosses are epiphytes, which are associated with the trunks and bases of trees - 21,4%, on the soil - 19,7% and on a limestone rock. In the ecological structure of the bryoflora, the features can be traced, zonally determined by the features of the bryoflora of the southern regions with pronounced aridity features. The predominant life form is loose turf - 44.2%, the second position is occupied by dense turf mosses (31,1%). In relation to the

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Cavalli, Edilson, Anderson Lange, Cassiano Cavalli, Ivan Bedin, Antonio Carlos Buchelt, and Estêvão Vicari Mellis. "Fertilization with potassium (K) in the soybean-corn succession affects behavior of plants and in the soil (oxisol)." November 2019, no. 13(11):2019 (November 20, 2019): 1839–47. http://dx.doi.org/10.21475/ajcs.19.13.11.p1869.

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The potassium fertilizer recommendations are almost entirely made by the main culture in the field, without taking into account the predecessor and successor cultures. The nutrients in crop residues represent a reserve for subsequent crops. Therefore, knowledge of the absorption and cycling capacity of nutrient through the culture, and efficient fertilization should consider the entire system are important. This study aimed to evaluate the effect of potassium levels in soybean and corn, changes in nutrient stocks in the soil profile, absorption and accumulation in plant tissues and soybean, co

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Stajic, Branko, Milivoj Vuckovic, and Marko Smiljanic. "Spatial distribution of spruce trees in the nature reserve 'Jankove bare' on mt. Kopaonik." Bulletin of the Faculty of Forestry, no. 100 (2009): 191–204. http://dx.doi.org/10.2298/gsf0900191s.

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The methodology and applicability of the study of spatial distribution of trees in Serbian forestry have been insufficiently reported and presented. This paper, based on mathematical?statistical principles, analyses the method of spatial distribution of spruce trees in the Nature Reserve 'Jankove Bare' in the National Park 'Kopaonik'. The following methods in the group of distance methods were applied: Kotar's method (1993), T2?method, and the index of distance dispersion (Johnson, Zimmer, 1985). The study results in a pure uneven-aged spruce stand based on all three methods showed that spruce

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Panda, Siddharth, Prasanta Kumar Majhi, Annamalai Anandan, et al. "Proofing Direct-Seeded Rice with Better Root Plasticity and Architecture." International Journal of Molecular Sciences 22, no. 11 (2021): 6058. http://dx.doi.org/10.3390/ijms22116058.

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The underground reserve (root) has been an uncharted research territory with its untapped genetic variation yet to be exploited. Identifying ideal traits and breeding new rice varieties with efficient root system architecture (RSA) has great potential to increase resource-use efficiency and grain yield, especially under direct-seeded rice, by adapting to aerobic soil conditions. In this review, we tried to mine the available research information on the direct-seeded rice (DSR) root system to highlight the requirements of different root traits such as root architecture, length, number, density,

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Veselý, Pavel. "Effect of sheep grazing on mineral matter content of steppe stands in national nature reserve Mohelská serpentinite steppe." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 53, no. 5 (2005): 159–68. http://dx.doi.org/10.11118/actaun200553050159.

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The aim of the study was to evaluate the effect of sheep pasture on the content of minerals in growth of the Mohelenska Serpentine Steppe National Nature Reserve.Merino sheep pastured on the steppe in 1997–1998, electrical fencer was used. There were 6.8–9.4 sheep per 1 ha in 1997 and 6.7–8.7 sheep per 1 ha in 1998 on the pasture area 4.25 and 6 ha. Samples of steppe growth were taken from five locations with typical fytocenological composition for particular area of steppe. Samples were taken each two weeks during vegetative season from area 3x1 m2. The contents of Ca, P, Na, K, Mg, Mn, Zn, C

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