Foliar and soil 15N natural abundances provide field evidence on nitrogen dynamics in temperate and boreal forest ecosystems

Cheng, Shulan; Fang, Huajun; Yu, Guirui; Zhu, Tiejun; Zheng, Jiaojiao

doi:10.1007/s11104-010-0524-x

Cited by 42 publications

(22 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Net N mineralisation rates are generally higher in subtropical and tropical forest soils than in temperate forest soils, and nearly all nitrogen that is mineralised in these systems is immediately nitrified. For example, soil NH 4 + accounts for more than 88% of the total inorganic N in the forest ecosystem at CBS20, while nitrification represents close to 80% of the net mineralisation in subtropical monsoon forest ecosystems at DHS21. Nitrification is associated with fairly large isotope effects22, and some studies have reported that 15 N in NH 4 + is more enriched than that in NO 3 − in soil solutions2023.…”

Section: Discussionmentioning

confidence: 99%

“…For example, soil NH 4 + accounts for more than 88% of the total inorganic N in the forest ecosystem at CBS20, while nitrification represents close to 80% of the net mineralisation in subtropical monsoon forest ecosystems at DHS21. Nitrification is associated with fairly large isotope effects22, and some studies have reported that 15 N in NH 4 + is more enriched than that in NO 3 − in soil solutions2023. 15 N enriched NH 4 + is available for absorption by plants before it has been nitrified in N-limited conditions24 in the north of the NSTEC.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Regional patterns of 15N natural abundance in forest ecosystems along a large transect in eastern China

Sheng

Fang

et al. 2014

Sci Rep

View full text Add to dashboard Cite

The regional determining factors underlying inter- and intra-site variation of 15N natural abundance in foliage, O horizon and mineral soil were investigated in eastern China.15N natural abundance values for these forest ecosystems were in the middle of the range of values previously found for global forest ecosystems. In contrast to commonly reported global patterns, temperate forest ecosystems were significantly more15N-enriched than tropical forest ecosystems, and foliage δ15N was negatively correlated with increasing mean annual temperature and net soil N mineralisation in eastern China. Tight N cycling in forest ecosystems and the use of atmospheric N deposition by trees might underlie the δ15N distribution patterns in eastern China. The existence of mycorrhizal fungi and root distribution profiles in the soil may also influence the15N natural abundance patterns in forest ecosystems of eastern China.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Regional patterns of 15N natural abundance in forest ecosystems along a large transect in eastern China

Sheng

Fang

et al. 2014

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The δ 15 N source in baseflow mainly derived from soil erosion, local fertilizer application, livestock, plant litter, and deposition from industry, vehicle transportation, and agriculture, but ammonium fertilizers were a minor source of NO 3 − ‐N in the Xiangxi River watershed (Hao, Gao, et al, ), which was similar to results from other studies conducted around the Yellow River (Yue, Li, Liu, Zhao, & Ding, ). Our study also showed that the NO 3 − consumption rate that derived from denitrification was higher than the NO 3 − production rate derived from nitrification, which led to changes in δ 15 N enrichment in soil solutions (Cheng, Fang, Yu, Zhu, & Zheng, ; Fang et al, ; Yue, Li, CQi, Lang, & Ding, ). This is because denitrification of the remaining nitrates will take place via N isotopic enrichment (Gooddy et al, ; Li et al, ).…”

Section: Discussionmentioning

confidence: 55%

“…Our study also showed that the NO 3 − consumption rate that derived from denitrification was higher than the NO 3 − production rate derived from nitrification, which led to changes in δ 15 N enrichment in soil solutions (Cheng, Fang, Yu, Zhu, & Zheng, 2010;Fang et al, 2011;Yue, Li, CQi, Lang, & Ding, 2015). This is because denitrification of the remaining nitrates will take place via N isotopic enrichment (Gooddy et al, 2014;Li et al, 2010).…”

Section: Impact Of Canopy To the Soil Layer On N Flowmentioning

confidence: 59%

Tracking the fate of deposited nitrogen and its redistribution in a subtropical watershed in China

et al. 2019

View full text Add to dashboard Cite

Vegetation cover and soil infiltration can result in nitrogen (N) redistribution and associative isotopic fractionation. This study investigated N and its isotopic characteristics from deposition to baseflow under different vegetation canopy cover types in a subtropical watershed in China. Results showed that canopy interception via vegetation cover types exhibited notable dilution effects on reactive nitrogen (Nr) deposition during the rainy season, with the highest maximum value of 287.4%. The range of δ15N changed from 3.0‰ to 11.9‰ in throughfall, which may have resulted from an increase in N taken up by vegetation and particles washed away from plant leaves during rainfall events. Throughfall, soil water, precipitation, and rainfall run‐off were the sources of D and 18O‐H2O in baseflow river water, wherein the rainwater and rainfall run‐off contributed 73% ± 8% and 15% ± 12%, respectively. Soil water was the main source of 15N‐NO3 in baseflow river water, which contributes 78% ± 4% of overall source, but precipitation only contributes 10%. The average annual Nr deposition flux was 24.4 ± 4.2 kg·ha−1·yr−1, whereas the annual total nitrogen exportation flux was 1062 ± 269.8 kg·yr−1. The 46% of HDO or D2O for river water came from rainfall run‐off, which would transport a maximum nitrate flux of 354 kg·yr−1. Moreover, vegetation cover and soil infiltration resulted in δ15N enrichment and a decrease in Nr in river flow.

show abstract

“…) and N losses through denitrification (Houlton and Bai ), and leaching (Cheng et al. , Fang et al. ).…”

Section: Introductionmentioning

confidence: 99%

Visualizing land‐use and management complexity within biogeochemical cycles of an agricultural landscape

et al. 2016

View full text Add to dashboard Cite

Crop fields are cultivated across continuities of soil, topography, and local climate that drive biological processes and nutrient cycling at the landscape scale; yet land management and agricultural research are often performed at the field scale, potentially neglecting the context of the surrounding landscape. Adding to this complexity is the overlap of ecosystems and their biogeochemical legacies, as a patchwork of crops fields, natural grasslands, and forests develops across the landscape. Furthermore, as new technologies and policies are introduced, management practices change, including fertilization strategies, which further alter biological productivity and nutrient cycling. All of these environmental, biological, and historical legacies are potentially recorded in the isotopic signal of plant, soil, and sediment organic matter across the landscape. We mapped over 1500 plant, soil, and sediment isotopic values and generated an isotopic landscape (isoscape) over a 40‐km2 agricultural site in NE Germany. We observed distinct patterns in the isotopic composition of organic matter sampled from the landscape that clearly reflect the landscape complexity. C3 crop intrinsic water‐use efficiency reflected a precipitation gradient, while native forest and grassland plant species did not, suggesting that native plants are more adapted to predominant climatic conditions. δ13Csoil patterns reflected both the long‐term input of plant organic matter, which was affected by the local climate conditions, and the repeated cultivation of corn. Soil organic matter 15N isotopic values also revealed spatial differences in fertilization regimes. Forest fragments, in which the nitrogen cycle was relatively open, were more water‐use efficient. Sediments from small water bodies received substantial inputs from surrounding field vegetation but were also affected by seasonal drying. These isotopic maps can be used to visualize large spatial heterogeneity and complexity, and they are a powerful means to interpret past and current trends in agricultural landscapes.

show abstract

Foliar and soil 15N natural abundances provide field evidence on nitrogen dynamics in temperate and boreal forest ecosystems

Abstract: The natural abundance of 15

Cited by 42 publications

References 49 publications

Regional patterns of 15N natural abundance in forest ecosystems along a large transect in eastern China

Regional patterns of 15N natural abundance in forest ecosystems along a large transect in eastern China

Tracking the fate of deposited nitrogen and its redistribution in a subtropical watershed in China

Visualizing land‐use and management complexity within biogeochemical cycles of an agricultural landscape

Contact Info

Product

Resources

About