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Journal articles on the topic 'Soil δ¹⁵N'

Author: Grafiati

Published: 11 December 2022

Last updated: 30 July 2025

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1

Wang, Zhoufeng, Ruijuan Hao, Juan Wang, Yuanyuan Shen та Xiangzhong Li. "Petroleum-contaminated soil extent recorded by δ<sup>15</sup>N and δ<sup>13</sup>C of plants and soils". JUSTC 52 (2022): 1. http://dx.doi.org/10.52396/justc-2021-0270.

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Petroleum contamination in terrestrial environments caused by industrial activities is a significant problem that has received considerable attention. Carbon and nitrogen isotopic compositions (δ<sup>13</sup>C and δ<sup>15</sup>N) effectively describe the behavior of plants and soils under petroleum contamination stress. To better understand plant and soil responses to petroleum-contaminated soil, δ<sup>13</sup>C and δ<sup>15</sup>N values of the plants (<i>Agropyron cristatum</i>, Leguminosae with C<sub>4</sub> photosynth

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Fujii, Saori, Takashi F. Haraguchi, and Ichiro Tayasu. "Radiocarbon signature reveals that most springtails depend on carbon from living plants." Biology Letters 17, no. 9 (2021): 20210353. http://dx.doi.org/10.1098/rsbl.2021.0353.

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Terrestrial carbon cycling is largely mediated by soil food webs. Identifying the carbon source for soil animals has been desired to distinguish their roles in carbon cycling, but it is challenging for small invertebrates at low trophic levels because of methodological limitations. Here, we combined radiocarbon ( 14 C) analysis with stable isotope analyses ( 13 C and 15 N) to understand feeding habits of soil microarthropods, especially focusing on springtail (Collembola). Most Collembola species exhibited lower Δ 14 C values than litter regardless of their δ 13 C and δ 15 N signatures, indica

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3

Chung, Kun H., Seog W. Rhee, Hyun S. Shin, and Christopher H. Moon. "Probe of cadmium(II) binding on soil fulvic acid investigated by 113Cd NMR spectroscopy." Canadian Journal of Chemistry 74, no. 7 (1996): 1360–65. http://dx.doi.org/10.1139/v96-152.

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Binding of cadmium(II) on soil fulvic acid (FA) was investigated over a range of fulvate-to-cadmium concentration ratios (8 – 59 equiv. mol−1) using 113Cd NMR spectroscopy. The 113Cd chemical shift of cadmium bound on fulvate was observed in a more downfield region (δ −20.4 to −15.6) than that bound on synthetic polymers, poly(acrylic acid) (PAA: δ −36.6 to −38.2), poly(methacrylic acid) (PMAA: δ −34.0 to −25.4), and poly(vinyl benzoic acid) (PVBA: δ −34.7 to −31.2). The calculated values of individual chemical shifts for the species CdL+ and CdL2 (L: carboxylate) formed in Cd(II)–carboxylate

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4

Dixon, E. R., M. S. A. Blackwell, M. S. Dhanoa та ін. "Measurement at the field scale of soil δ 13 C and δ 15 N under improved grassland". Rapid Communications in Mass Spectrometry 24, № 5 (2010): 511–18. http://dx.doi.org/10.1002/rcm.4345.

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5

Yang, Baoshan, Hui Wang, Yingkui Jiang, Fang Dong, Xinhua He та Xiaoshuang Lai. "Combing δ15N and δ18O to identify the distribution and the potential sources of nitrate in human-impacted watersheds, Shandong, China". RSC Advances 8, № 41 (2018): 23199–205. http://dx.doi.org/10.1039/c8ra04364g.

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NO<sub>3</sub><sup>−</sup> showed seasonal and spatial patterns in two human-impacted watersheds. NO<sub>3</sub><sup>−</sup> is primarily from manure/sewage according to δ<sup>15</sup>N and δ<sup>18</sup>O. Microbial nitrification took place in the NO<sub>3</sub><sup>−</sup> of manure/sewage and soil nitrate.

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Deek, A., K. Emeis, and U. Struck. "Seasonal variations in nitrate isotope composition of three rivers draining into the North Sea." Biogeosciences Discussions 7, no. 4 (2010): 6051–88. http://dx.doi.org/10.5194/bgd-7-6051-2010.

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Abstract. Nitrate loading of coastal ecosystems by rivers that drain industrialised catchments continues to be a problem in the South Eastern North Sea, in spite of significant mitigation efforts over the last 2 decades. To identify nitrate sources, sinks, and turnover in three German rivers that discharge into the German Bight, we determined δ 15N-NO3- and δ18O- NO3- in nitrate and δ 15N of particulate nitrogen for the period 2006–2009 (biweekly samples). The nitrate loads of Rhine, Weser and Ems varied seasonally in magnitude and δ 15N-NO3- (6.5–21‰), whereas the δ 18O-NO3- (-0.3–5.9‰) and δ

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7

Bonsall, Michael B., Cynthia A. Froyd, and Elizabeth S. Jeffers. "Resilience: nitrogen limitation, mycorrhiza and long-term palaeoecological plant–nutrient dynamics." Biology Letters 16, no. 1 (2020): 20190441. http://dx.doi.org/10.1098/rsbl.2019.0441.

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Ecosystem dynamics are driven by both biotic and abiotic processes, and perturbations can push ecosystems into novel dynamical regimes. Plant–plant, plant–soil and mycorrhizal associations all affect plant ecosystem dynamics; however, the direction and magnitude of these effects vary by context and their contribution to ecosystem resilience over long time periods remains unknown. Here, using a mathematical framework, we investigate the effects of plant feedbacks and mycorrhiza on plant–nutrient interactions. We show evidence for strong nutrient controlled feedbacks, moderation by mycorrhiza an

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8

Kayler, Z. E., M. Kaiser, A. Gessler, R. H. Ellerbrock та M. Sommer. "Application of δ<sup>13</sup>C and δ<sup>15</sup>N isotopic signatures of organic matter fractions sequentially separated from adjacent arable and forest soils to identify carbon stabilization mechanisms". Biogeosciences 8, № 10 (2011): 2895–906. http://dx.doi.org/10.5194/bg-8-2895-2011.

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Abstract. Identifying the chemical mechanisms behind soil carbon bound in organo-mineral complexes is necessary to determine the degree to which soil organic carbon is stabilized belowground. Analysis of δ13C and δ15N isotopic signatures of stabilized OM fractions along with soil mineral characteristics may yield important information about OM-mineral associations and their processing history. We anlayzed the δ13C and δ15N isotopic signatures from two organic matter (OM) fractions along with soil mineral proxies to identify the likely binding mechanisms involved. We analyzed OM fractions hypot

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9

Diao, Huajie, Paul Kardol, Kuanhu Dong, and Changhui Wang. "Effects of nitrogen addition and mowing on nitrogen- and water-use efficiency of Artemisia frigida in a grassland restored from an abandoned cropland." Journal of Plant Ecology 14, no. 3 (2021): 515–26. http://dx.doi.org/10.1093/jpe/rtab006.

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Abstract Aims Competition among plants in a community usually depends on their nitrogen (N)-use efficiency (NUE) and water-use efficiency (WUE) in arid and semi-arid regions. Artemisia frigida is an indicator species in heavily degraded grassland, however, how its NUE and WUE respond to N addition in different successional stages is still unclear, especially with mowing, a common management practice in semi-arid grasslands. Methods Based on a long-term controlled experiment with N addition and mowing in an abandoned cropland from 2006 to 2013, we investigated the NUE and WUE of A. frigida in t

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10

Hilton, R. G., A. Galy, A. J. West, N. Hovius та G. G. Roberts. "Geomorphic control on the δ<sup>15</sup>N of mountain forest". Biogeosciences Discussions 9, № 9 (2012): 12593–626. http://dx.doi.org/10.5194/bgd-9-12593-2012.

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Abstract. Mountain forests are subject to high rates of physical erosion which can export particulate nitrogen from ecosystems. However, the impact of geomorphic processes on nitrogen budgets remains poorly constrained. We have used the elemental and isotopic composition of soil and plant organic matter to investigate nitrogen cycling in the mountain forest of Taiwan, from 24 sites with distinct geomorphic (topographic slope) and climatic (precipitation, temperature) characteristics. The organic carbon to nitrogen ratio of soil organic matter decreased with soil 14C age, providing constraint o

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11

Hilton, R. G., A. Galy, A. J. West, N. Hovius та G. G. Roberts. "Geomorphic control on the δ<sup>15</sup>N of mountain forests". Biogeosciences 10, № 3 (2013): 1693–705. http://dx.doi.org/10.5194/bg-10-1693-2013.

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Abstract. Mountain forests are subject to high rates of physical erosion which can export particulate nitrogen from ecosystems. However, the impact of geomorphic processes on nitrogen budgets remains poorly constrained. We have used the elemental and isotopic composition of soil and plant organic matter to investigate nitrogen cycling in the mountain forest of Taiwan, from 24 sites with distinct geomorphic (topographic slope) and climatic (precipitation, temperature) characteristics. The organic carbon to nitrogen ratio of soil organic matter decreased with soil 14C age, providing constraint o

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12

Liao, Kaihua, Xiaoming Lai та Qing Zhu. "Soil <i>δ</i><sup>15</sup>N is a better indicator of ecosystem nitrogen cycling than plant <i>δ</i><sup>15</sup>N: A global meta-analysis". SOIL 7, № 2 (2021): 733–42. http://dx.doi.org/10.5194/soil-7-733-2021.

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Abstract. The nitrogen-15 (15N) natural abundance composition (δ15N) in soils or plants is a useful tool to indicate the openness of ecosystem N cycling. This study aimed to evaluate the influence of the experimental warming on soil and plant δ15N. We applied a global meta-analysis method to synthesize 79 and 76 paired observations of soil and plant δ15N from 20 published studies, respectively. Results showed that the mean effect sizes of the soil and plant δ15N under experimental warming were −0.524 (95 % CI (confidence interval): −0.987 to −0.162) and 0.189 (95 % CI: −0.210 to 0.569), respec

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13

Guidoni, Irene, Cristiana Sbrana, Andrea Scartazza, et al. "Seasonal dynamics of C and N along the soil-mycorrhiza-plant continuum in a Pinus sylvestris boreal forest." ARPHA Conference Abstracts 8 (May 28, 2025): e149501. https://doi.org/10.3897/aca.8.e149501.

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Boreal forests represent one of the most important carbon (C) sinks globally. Current climate change could have unpredictable effects on the processes that regulate the dynamics of C allocation in boreal forests and, consequently, on the terrestrial C balance. In these extremely nutrient-poor ecosystems, symbioses between plant roots and ectomycorrhizal fungi play a crucial role in enhancing nutrient uptake by plants. It was therefore hypothesised that, in a mature <em>Pinus sylvestris</em> boreal forest, there is a phenological and environmental control on C and N exchange. For this reason, a

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14

Conen, F., M. Zimmermann, J. Leifeld, B. Seth та C. Alewell. "Relative stability of soil carbon revealed by shifts in δ<sup>15</sup>N and C:N ratio". Biogeosciences 5, № 1 (2008): 123–28. http://dx.doi.org/10.5194/bg-5-123-2008.

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Abstract. Life on earth drives a continuous exchange of carbon between soils and the atmosphere. Some forms of soil carbon, or organic matter, are more stable and have a longer residence time in soil than others. Relative differences in stability have often been derived from shifts in δ13C (which is bound to a vegetation change from C3 to C4 type) or through 14C-dating (which is bound to small sample numbers because of high measurement costs). Here, we propose a new concept based on the increase in δ15N and the decrease in C:N ratio with increasing stability. We tested the concept on grassland

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15

Conen, F., M. Zimmermann, J. Leifeld, B. Seth та C. Alewell. "Relative stability of soil carbon revealed by shifts in δ<sup>15</sup>N and C:N ratio". Biogeosciences Discussions 4, № 4 (2007): 2915–28. http://dx.doi.org/10.5194/bgd-4-2915-2007.

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Abstract. Life on earth drives a continuous exchange of carbon between soils and the atmosphere. Some forms of soil carbon, or organic matter, are more stable and have a longer residence time in soil than others. Relative differences in stability have often been derived from shifts in δ13C (which is bound to a vegetation change from C3 to C4 type) or through 14C-dating (which is bound to small sample numbers because of high measurement costs). Here, we propose a new concept based on the increase in δ15N and the decrease in C:N ratio with increasing stability. We tested the concept on grassland

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16

Suriyakup, P., A. Polthanee, K. Pannangpetch, R. Katawatin, J. C. Mouret, and C. Clermont-Dauphin. "Introducing mungbean as a preceding crop to enhance nitrogen uptake and yield of rainfed rice in the north-east of Thailand." Australian Journal of Agricultural Research 58, no. 11 (2007): 1059. http://dx.doi.org/10.1071/ar06309.

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One possible management option for farmers to improve the soil nitrogen (N) supply for rice production is the cultivation of a prior legume. The objective of this study was to investigate the value of such an option in the lowland of the north-east of Thailand. Two experiments were established in 2 typical locations in a split-plot design with 4 replicates. The main plots included 3 nitrogen levels (0, 30, and 60 kg N/ha) and the subplots, 4 pre-rice managements: (i) fallow with weeds removed (FW–); (ii) with weeds incorporated before the rice crop (FW+); (iii) mungbean incorporated at floweri

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17

Huang, Ching-Yu, Katherine L. Tully, Deborah A. Clark, Steven F. Oberbauer та Terrence P. McGlynn. "The δ15N signature of the detrital food web tracks a landscape-scale soil phosphorus gradient in a Costa Rican lowland tropical rain forest". Journal of Tropical Ecology 28, № 4 (2012): 395–403. http://dx.doi.org/10.1017/s0266467412000284.

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Abstract:In this study, we investigated whether landscape-scale variation of soil P accounts for 13C and 15N composition of detrital invertebrates in a lowland tropical rain forest in Costa Rica. The top 10-cm soil, leaf-litter samples and plant foliage were collected among 18 plots representing a three-fold soil P gradient during 2007–2009. Body tissue of litter invertebrates (extracted from leaf-litter samples) along with soil, leaf litter and green foliage were analysed for total C, total N, δ13C and δ15N values. Differences in δ13C and δ15N signatures across plots and relative trophic dist

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18

Li, Chengyang, Fei Peng, Chimin Lai та ін. "Plant community changes determine the vegetation and soil δ 13 C and δ 15 N enrichment in degraded alpine grassland". Land Degradation & Development 32, № 7 (2021): 2371–82. http://dx.doi.org/10.1002/ldr.3912.

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19

Ponsard, Sergine, та Roger Arditi. "What Can Stable Isotopes (δ 15 N and δ 13 C) Tell about the Food Web of Soil Macro-Invertebrates?" Ecology 81, № 3 (2000): 852. http://dx.doi.org/10.2307/177382.

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20

Biswas, A., B. C. Si та F. L. Walley. "Spatial relationship between δ<sup>15</sup>N and elevation in agricultural landscapes". Nonlinear Processes in Geophysics 15, № 3 (2008): 397–407. http://dx.doi.org/10.5194/npg-15-397-2008.

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Abstract. Understanding of the nitrogen (N) cycle and its spatial variability is important for managing ecosystems. Soil δ15N, as an important indicator of different soil nitrogen cycling processes, may provide critical information about the spatial variability in soil N cycling. The objective of this study was to examine the dominant landscape scale variability of δ15N, the location of the variability and its spatial relationship with elevation. Soil δ15N and elevation were measured along two transects (Davidson and Elstow, Saskatchewan, Canada). Each transect had 128 points with 3 m sampling

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21

Kütük, C., G. Çaycı, and L. K. Heng. "Effects of increasing salinity and 15N-labelled urea levels on growth, N uptake, and water use efficiency of young tomato plants." Soil Research 42, no. 3 (2004): 345. http://dx.doi.org/10.1071/sr02006.

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A greenhouse experiment was conducted to investigate the response of tomato plants (Lycopersicon lycopersicum L.) to salinity and to determine the interactive effects of salinity and nitrogen fertilisation on yield, nitrogen uptake, water use efficiency (WUE), and root-zone salinity during early plant growth. Furthermore, the effects of salinity and N fertilisation were evaluated by measurement of carbon isotope discrimination (Δ). Tomato plants were grown in pots filled with 8 kg (dry weight equivalent) of Krumbach sandy loam. Salinity treatments were imposed by irrigation water containing Na

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22

Harris, P., R. Bol, J. Evans та ін. "Effect of long-term drainage on plant community, soil carbon and nitrogen contents and stable isotopic (δ 13 C, δ 15 N) composition of a permanent grassland". European Journal of Soil Science 69, № 1 (2017): 48–68. http://dx.doi.org/10.1111/ejss.12504.

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23

Kayler, Z. E., M. Kaiser, A. Gessler, R. H. Ellerbrock та M. Sommer. "Application of <i>δ</i><sup>13</sup>C and <i>δ</i><sup>15</sup>N isotopic signatures of organic matter fractions sequentially separated from adjacent arable and forest soils to identify carbon stabilization mechanisms". Biogeosciences Discussions 8, № 2 (2011): 1985–99. http://dx.doi.org/10.5194/bgd-8-1985-2011.

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Abstract. Identifying the chemical mechanisms behind soil carbon bound in organo-mineral complexes is necessary to determine the degree to which soil organic carbon is stabilized belowground. We used the δ13C and δ15N isotopic signatures from two organic matter (OM) fractions from soil to identify the likely binding mechanisms involved. We used OM fractions hypothesized to contain carbon stabilized through organo-mineral complexes: (1) OM separated chemically with sodium pyrophosphate (OM(PY)) and (2) OM stabilized in microstructures found in the chemical extraction residue (OM(ER)). Furthermo

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24

Townsend, M. A., R. O. Sleezer, and S. A. Macko. "Effects of agricultural practices and vadose zone stratigraphy on nitrate concentration in ground water in Kansas, USA." Water Science and Technology 33, no. 4-5 (1996): 219–26. http://dx.doi.org/10.2166/wst.1996.0508.

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Differences in nitrate-N concentrations in ground water in Kansas can be explained by variations in agricultural practices and vadose-zone stratigraphy. In northwestern Kansas, past use of a local stream for tailwater runoff from irrigation and high fertilizer applications for sugar-beet farming resulted in high nitrate-N concentrations (12–60 mg L−1; in both soil and ground water. Nitrogen isotope values from the soil and ground water range from +4 to +8‰, which is typical for a fertilizer source. In parts of south-central Kansas, the use of crop rotation and the presence of both continuous f

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25

Koerner, W., E. Dambrine, J. L. Dupouey та M. Benoît. "δ 15 N of forest soil and understorey vegetation reflect the former agricultural land use". Oecologia 121, № 3 (1999): 421–25. http://dx.doi.org/10.1007/s004420050947.

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26

Yoo, Jisu, and Yun S. Kim. "Identification of Distribution of Nitrogen Pollutants Based on Nitrogen and Oxygen Stable Isotope Ration in Nitrate from Water in North Hangang River, Korea." Journal of Environmental Analysis, Health and Toxicology 24, no. 4 (2021): 164–70. http://dx.doi.org/10.36278/jeaht.24.4.164.

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To identify the origin of major pollutants, we determined the distribution of stable isotopes of δ<sup>15</sup>N and δ<sup>18</sup>O in nitrate extracted from water samples and sediments collected at two-month intervals during 2019-2020 from the North Hangang River, Korea. Stable isotope ratios were measured to investigate nitrogen contamination sources in the water system. This study determined that the North Hangang River was affected by soil organic matter, livestock manure, and domestic sewage, and that the streams and rivers flowing into the main stream of the Nort

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27

Ipsilantis, Ioannis, Georgia S. Theologidou, Fotis Bilias, Anna Karypidou, Apostolos Kalyvas, and Ioannis T. Tsialtas. "Phosphorus fertilisation may induce Zn deficiency in cotton (." Functional Plant Biology 49, no. 4 (2022): 382–91. http://dx.doi.org/10.1071/fp21282.

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On a P-poor, calcareous soil, three upland cotton (Gossypium hirsutum L.) cultivars (ST 402, ST 405, Zeta 2) were tested for 2 years under three P rates (0, 13.1, 26.2 kg P ha−1). Leaf traits (SPAD values; specific leaf area, SLA; carbon isotope discrimination, Δ; 15N natural abundance, δ15N) and elements (N, P, K, C, Na, Zn) along with arbuscular mycorrhizal (AM) colonisation were measured at first open flower, full bloom and first open boll stages. Phosphorus addition decreased yield, but had no effect on fibre quality, a response attributed to P-induced Zn deficiency, previously reported fo

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28

H., Vervaet, Boeckx P., Unamuno V., O. Van Cleemput та Hofman G. "Can δ 15 N profiles in forest soils predict $$ {\rm{NO}}_3^ - $$ loss and net N mineralization rates?" Biology and Fertility of Soils 36, № 2 (2002): 143–50. http://dx.doi.org/10.1007/s00374-002-0522-0.

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29

Nieto-Moreno, Vanesa, Alexander Rohrmann, Marcel T. J. van der Meer та ін. "Elevation-dependent changes in n -alkane δ D and soil GDGTs across the South Central Andes". Earth and Planetary Science Letters 453 (листопад 2016): 234–42. http://dx.doi.org/10.1016/j.epsl.2016.07.049.

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30

Comas-Bru, Laia, та Frank McDermott. "Data-model comparison of soil–water δ 18 O at a temperate site in N. Spain with implications for interpreting speleothem δ 18 O". Journal of Hydrology 530 (листопад 2015): 216–24. http://dx.doi.org/10.1016/j.jhydrol.2015.09.053.

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31

Chang, S. X., та L. L. Handley. "Site history affects soil and plant 15 N natural abundances (δ 15 N) in forests of northern Vancouver Island, British Columbia". Functional Ecology 14, № 3 (2000): 273–80. http://dx.doi.org/10.1046/j.1365-2435.2000.00424.x.

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32

Peterse, F., M. T. J. van der Meer, S. Schouten та ін. "Assessment of soil <i>n</i>-alkane δ<i>D</i> and branched tetraether membrane lipid distributions as tools for paleoelevation reconstruction". Biogeosciences 6, № 12 (2009): 2799–807. http://dx.doi.org/10.5194/bg-6-2799-2009.

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Abstract. δ18O values of pedogenic minerals forming from soil water are commonly used to reconstruct paleoelevation. To circumvent some of the disadvantages of this method, soil n-alkane δD values were recently proposed as a new tool to reconstruct elevation changes, after showing that soil n-alkane δD values track the altitude effect on precipitation δD variations (r2=0.73 along Mt. Gongga, China). To verify the suitability of soil n-alkane δD values as a paleoelevation proxy we measured the δD of soil n-alkanes along Mt. Kilimanjaro (Tanzania). At midslope, soil n-alkane δD values are possib

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33

GUBSCH, MARLÉN, CHRISTIANE ROSCHER, GERD GLEIXNER та ін. "Foliar and soil δ 15 N values reveal increased nitrogen partitioning among species in diverse grassland communities". Plant, Cell & Environment 34, № 6 (2011): 895–908. http://dx.doi.org/10.1111/j.1365-3040.2011.02287.x.

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White, J. W., J. A. Castillo, J. R. Ehleringer, J. A. C. Garcia, and S. P. Singh. "Relations of carbon isotope discrimination and other physiological traits to yield in common bean (Phaseolus vulgaris) under rainfed conditions." Journal of Agricultural Science 122, no. 2 (1994): 275–84. http://dx.doi.org/10.1017/s0021859600087463.

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SUMMARYAlthough direct selection for seed yield under water deficit can result in genetic gains in the common bean (Phaseolus vulgaris L.), progress could be enhanced through selection for additional traits that are related to underlying mechanisms of adaptation to water deficit. Carbon isotope discrimination (Δ) has received considerable attention as an indicator of water use efficiency and adaptation to water deficit. To test the utility of Δ as a selection criterion, Δ and other traits were measured in F2 and F3 generations of a nine-parent diallel grown under rainfed conditions at two loca

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35

Peterse, F., M. T. J. van der Meer, S. Schouten та ін. "Assessment of soil <i>n</i>-alkane δ<i>D</i> and branched tetraether membrane lipid distributions as tools for paleoelevation reconstruction". Biogeosciences Discussions 6, № 5 (2009): 8609–31. http://dx.doi.org/10.5194/bgd-6-8609-2009.

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Abstract. δ18O values of pedogenic minerals forming from soil water are commonly used to reconstruct paleoelevation. To circumvent some of the disadvantages of this method, soil n-alkane δD values were recently proposed as a new tool to reconstruct elevation changes, after showing that soil n-alkane δD values track the altitude effect on precipitation δD variations (r2=0.73 along Mt. Gongga, China). To verify the suitability of soil n-alkane δD values as a paleoelevation proxy we measured the δD of soil n-alkanes along Mt. Kilimanjaro (Tanzania). At midslope, soil n-alkane δD values are highly

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36

Mihalache, Daniela, Carmen Eugenia Sîrbu, and Adriana Grigore. "Assessing the Absorption Degree of the Nitrogen Forms from Soil into Plant Using the 15N Isotope as a Marker." “Agriculture for Life, Life for Agriculture” Conference Proceedings 1, no. 1 (2018): 86–92. http://dx.doi.org/10.2478/alife-2018-0013.

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Abstract The aim of the study was to assess the absorbtion degree of different nitrogen forms (ammonium, nitric, amidic) from soil into the plant by using nuclear techniques and 15N isotope as a tracer. In the same time, the effect of foliar fertilization on increasing the efficiency of nitrogen use by biostimulating the plant up-take was highlighted. Urea and ammonium nitrate labeled with 15N isotope (10% from total nitrogen content of the fertilizers being covered by 15N isotope) were incorporated in soil. In order to highlight the efficiency of foliar fertilization, fertilizers having NPK m

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37

Hubick, KT. "Effects of Nitrogen Source and Water Limitation on Growth, Transpiration Efficiency and Carbon-Isotope Discrimination in Peanut Cultivars." Functional Plant Biology 17, no. 4 (1990): 413. http://dx.doi.org/10.1071/pp9900413.

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Effects on growth of nitrogen nutrition and its interactions with water availability were explored in two experiments using cultivars of peanut (Arachis hypogaea L.). In one experiment plants of the two cultivars, Tifton-8 and Chico, were given relatively high (high-N) or low (low-N) amounts of nitrogen, supplied as ammonium nitrate. The low-N plants accumulated less dry matter and used less water than the high-N plants. Transpiration efficiency, the ratio of dry matter produced to water used (W), was not significantly affected by the nitrogen treatment and neither was carbon-isotope discrimin

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Groß-Schmölders, Miriam, Pascal von Sengbusch, Jan Paul Krüger та ін. "Switch of fungal to bacterial degradation in natural, drained and rewetted oligotrophic peatlands reflected in <i>δ</i><sup>15</sup>N and fatty acid composition". SOIL 6, № 2 (2020): 299–313. http://dx.doi.org/10.5194/soil-6-299-2020.

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Abstract. For centuries European peatlands have been degrading along with drainage, land use and climate changes. Increasing pressure on peatland ecosystems calls for a more cost-efficient method to indicate the current state of peatlands and the success of restoration efforts. Metabolic pathways in peatland soils are imprinted in stable isotope compositions due to differences in microorganism communities and their metabolic pathways. Therefore, we hypothesize that depth profiles of nitrogen stable isotope values provide a promising opportunity to detect peatland decomposition or restoration.

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Machado, Deivid Lopes, Marcos Gervasio Pereira, Lauana Lopes dos Santos, Anderson Ribeiro Diniz, and Roni Fernandes Guareschi. "ORGANIC MATTER AND SOIL FERTILITY IN DIFFERENT SUCCESSIONAL STAGES OF SEASONAL SEMIDECIDUAL FOREST." Revista Caatinga 32, no. 1 (2019): 179–88. http://dx.doi.org/10.1590/1983-21252019v32n118rc.

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ABSTRACT The accumulation and transformation of organic matter in the soil are fundamental for the maintenance and improvement of the chemical, physical, and biological attributes of the soil, and consequently, for the tropical forests functioning. The objective of this study was to evaluate the influence of secondary forests with different successional stages on soil organic matter, carbon and nitrogen stocks, and soil fertility. Three areas of seasonal semideciduous forest, located in Pinheiral - RJ, with different successional stages were selected: initial stage forest - ISF, medium stage f

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Xia, Shaopan, Zhaoliang Song, Qiang Li та ін. "Distribution, sources, and decomposition of soil organic matter along a salinity gradient in estuarine wetlands characterized by C:N ratio, δ 13 C‐δ 15 N, and lignin biomarker". Global Change Biology 27, № 2 (2020): 417–34. http://dx.doi.org/10.1111/gcb.15403.

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Propp, Claudia, Ingo Jänen, and Tim Jennerjahn. "Sources and Degradation of Sedimentary Organic Matter in Coastal Waters off the Brantas River, Java, Indonesia." Asian Journal of Water, Environment and Pollution 10, no. 1 (2013): 95–115. http://dx.doi.org/10.3233/ajw-2013-10_1_09.

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Organic matter (OM) processing in estuaries is crucial in the marine environment as significant quantities of OM are buried or modified in these land-ocean-interaction zones. Southeast Asia is globally important in this regard because of high sediment inputs to the ocean and intense human modifications in the coastal zone, as exemplarily can be observed in the catchment of Java's second largest river, the Brantas. In order to investigate sedimentary OM processing, surface sediments and short sediment cores were sampled in its estuary in the rainy and dry seasons of 2008. δ $^{13}$ C $_{org}$ ,

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Horwath, Aline B., Jessica Royles, Richard Tito, et al. "Bryophyte stable isotope composition, diversity and biomass define tropical montane cloud forest extent." Proceedings of the Royal Society B: Biological Sciences 286, no. 1895 (2019): 20182284. http://dx.doi.org/10.1098/rspb.2018.2284.

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Liverworts and mosses are a major component of the epiphyte flora of tropical montane forest ecosystems. Canopy access was used to analyse the distribution and vertical stratification of bryophyte epiphytes within tree crowns at nine forest sites across a 3400 m elevational gradient in Peru, from the Amazonian basin to the high Andes. The stable isotope compositions of bryophyte organic material ( 13 C/ 12 C and 18 O/ 16 O) are associated with surface water diffusive limitations and, along with C/N content, provide a generic index for the extent of cloud immersion. From lowland to cloud forest

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Zech, M., R. Zech, K. Rozanski, A. Hemp, G. Gleixner та W. Zech. "Revisiting Mt. Kilimanjaro: Do n-alkane biomarkers in soils reflect the δ<sup>2</sup>H isotopic composition of precipitation?" Biogeosciences Discussions 11, № 6 (2014): 7823–52. http://dx.doi.org/10.5194/bgd-11-7823-2014.

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Abstract. During the last decade compound-specific deuterium (δ2H) analysis of plant leaf wax-derived n-alkanes has become a promising and popular tool in paleoclimate research. This is based on the widely accepted assumption that n-alkanes in soils and sediments generally reflect δ2H of precipitation (δ2Hprec). Recently, several authors suggested that δ2H of n-alkanes (δ2H,sub>n-alkanes) can also be used as proxy in paleoaltimetry studies. Here we present results from a δ2H transect study (~1500 to 4000 m a.s.l.) carried out on precipitation and soil samples taken from the humid southern s

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Khuong, Nguyen Quoc, Dang Phan Thien Minh, Le Thi My Thu та Le Vinh Thuc. "The Potential of Bacterial Strains of Luteovulum sphaeroides W22 and W47 for Producing δ-Aminolevulinic Acid to Improve Soil Quality, Growth and Yield of Saline-Irrigated Rice Cultivated in Salt-Contaminated Soil". Agronomy 13, № 5 (2023): 1409. http://dx.doi.org/10.3390/agronomy13051409.

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The present study aimed to identify the abilities of the δ-aminolevulinic acid (ALA) producing purple non-sulfur bacteria (PNSB), Luteovulum sphaeroides W22 and W47, to reduce the Na+ concentration, and to ameliorate the soil fertility, nutrients uptake, growth and yield of rice on the salt-contaminated soil. A two-factor experiment was conducted following a completely randomized block design. The factors were the frequency of applying saline irrigation (zero, one, two, three and four times) and the ALA-producing PNSB supplementation (applying only W22, only W47 and mixed W22 + W47). The resul

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Mantoani, Maurício Cruz, Alberto Benavent González, Leopoldo García Sancho, and Bruce Arthur Osborne. "Growth, phenology and N-utilization by invasive populations of Gunnera tinctoria." Journal of Plant Ecology 13, no. 5 (2020): 589–600. http://dx.doi.org/10.1093/jpe/rtaa047.

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Abstract Aims Gunnera tinctoria is an unusual N-fixing plant species that has become invasive worldwide, generally in environments with a low evaporative demand and/or high rainfall. Amongst the many mechanisms that may explain its success as an introduced species, a contrasting phenology could be important but this may depend on an ability to grow and utilize nutrients under sub-optimal conditions. We examined whether G. tinctoria has an advantage in terms of a contrasting phenology and N-fixing capability, in comparisons with Juncus effusus, the native species most impacted by G. tinctoria i

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Burneo, Juan I., Ángel Benítez, James Calva, Pablo Velastegui, and Vladimir Morocho. "Soil and Leaf Nutrients Drivers on the Chemical Composition of the Essential Oil of Siparuna muricata (Ruiz & Pav.) A. DC. from Ecuador." Molecules 26, no. 10 (2021): 2949. http://dx.doi.org/10.3390/molecules26102949.

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Chemical compositions of plants are affected by the initial nutrient contents in the soil and climatic conditions; thus, we analyzed for the first time the effects of soil and leaf nutrients on the compositions of the essential oils (EOs) of Siparuna muricata in four different localities in Ecuador. EOs were obtained by hydrodistillation and analyzed by gas chromatography/mass spectrometry (GC/MS) and a gas chromatography/flame ionization detector (GC/FID). Enantiomeric distribution by GC/MS was determined, modifying the enantiomeric separation of β-pinene, limonene, δ-elemene, β-bourbonene, c

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Gelagoti, Fani, Rallis Kourkoulis, Ioannis Anastasopoulos, and George Gazetas. "Rocking isolation of low-rise frame structures founded on isolated footings." Earthquake Engineering and Structural Dynamics 41, no. 7 (2011): 1177–97. https://doi.org/10.1002/eqe.1182.

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This paper explores the effectiveness of a new approach to foundation seismic design. Instead of the present practice of over-design, the foundations are intentionally under-dimensioned so as to uplift and mobilize the strength of the supporting (stiff) soil, in the hope that they will thus act as a rocking–isolation mechanism, limiting the inertia transmitted to the superstructure, and guiding plastic ‘hinging’ into soil and the foundation–soil interface. An idealized simple but realistic one-bay two-story reinforced concrete moment resisting frame serves as an example to compare the two alte

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de Junet, A., G. Abril, F. Guérin, I. Billy та R. de Wit. "Sources and transfers of particulate organic matter in a tropical reservoir (Petit Saut, French Guiana): a multi-tracers analysis using δ<sup>13</sup>C, C/N ratio and pigments". Biogeosciences Discussions 2, № 4 (2005): 1159–96. http://dx.doi.org/10.5194/bgd-2-1159-2005.

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Abstract. Carbon cycling and organic matter transfers in the tropical Sinnamary river system (French Guiana), including a mid-stream reservoir (Petit Saut) and its estuary on the Atlantic coast, were studied during the dry season by analyzing the organic carbon isotopic ratios (δ13C-OC), C/N ratios and pigments contents of suspended matter, sediments, sediments traps and epiphytic and epilithic biofilms. In the River upstream as well as in surface sediments at the entrance of the reservoir and at the littoral zone of the reservoir, particulate organic matter (POM) was in majority of terrestria

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Lang, Mait, Tauri Tampuu, and Heido Trofimov. "Forest stand height predicted from ICESat-2 ATLAS data for forest inventory and comparison to airborne laser scanning metrics." Forestry Studies 80, no. 1 (2024): 1–19. https://doi.org/10.2478/fsmu-2024-0001.

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Abstract The study analysed 2019–2022 summertime canopy height predictions (H ICESat) given in ICESat-2 ATLAS dataset ATL08 for hemiboreal forests growing on an area of 40,000 km2 in Estonia around 25.6° E, 58.8° N. In total 12,711 ATL08 20×20 m pixel observations were used from 3,065 forest stands with homogenous canopy structure. Regression modelling was used to explain variability in ground surface elevation estimates, and relationships of H ICESat to basal area weighted mean tree height given in the forest inventory database (H FI) and to the 95th percentile of the vertical distribution of

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Ho, Le Tuan, Raimund Schneider, and Frank M. Thomas. "Growth of the tropical Pinus kesiya as influenced by climate and nutrient availability along an elevational gradient." Journal of Plant Ecology 13, no. 1 (2019): 97–106. http://dx.doi.org/10.1093/jpe/rtz046.

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Abstract Aims In contrast to temperate regions, the reasons for growth reductions of individual tree species along elevational gradients in tropical mountain ranges are poorly known, especially for tropical conifers. We aimed at testing whether climatic or edaphic conditions are responsible for the reduced growth of Pinus kesiya, a widely distributed pine species of southern and south-eastern Asia, at higher elevations. Methods We analysed the stem diameter increment and the isotope discrimination against 13C (△ 13C) in tree rings of P. kesiya along an elevational gradient of ~900 to ~2000 m a

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