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Nitrogen additions affect litter quality and soil biochemical properties in a peatland of Northeast China
Y. Y. Song, C. C. Song, H. N. Meng, C. M. Swarzenski, X. W. Wang and W. W. Tan; Song ZC(宋长春)
2017
发表期刊Ecological Engineering
卷号100页码:175-185
摘要Nitrogen (N) is a limiting nutrient in many peatland ecosystems. Enhanced N deposition, a major component of global climate change, affects ecosystem carbon (C) balance and alters soil C storage by changing plant and soil properties. However, the effects of enhanced N deposition on peatland ecosystems are poorly understood. We conducted a two-year N additions field experiment in a peatland dominated by Eriophorum vaginatum in the Da Xing'an Mountains, Northeast China. Four levels of N treatments were applied: (1) CK (no N added), (2) N1 (6 g N m(-2) yr(-1)), (3) N2 (12 g N m(-2) yr(-1)), and (4) N3 (24 gN m(-2) yr(-1)). Plant and soil material was harvested at the end of the Second growing season. N additions increased litter N and phosphorus (P) content, as well as S-glucosidase, invertase, and acid-phosphatase activity, but decreased litter C:N and C:P ratios. Litter carbon content remained unchanged. N additions increased available NH4+-N and NO3--N as well as total Gram-positive (Gram+), Gram-negative (Gram-), and total bacterial phospholipid fatty acids (PLFA) in shallow soil (0-15 cm depth). An increase in these PLFAs was accompanied by a decrease in soil labile organic C (microbial biomass carbon and dissolved organic carbon), and appeared to accelerate decomposition and reduce the stability of the soil C pool. Invertase and urease activity in shallow soils and acid-phosphatase activity in deep soils (15-30 cm depth) was inhibited by N additions. Together, these findings suggest that an increase in N deposition in peatlands could accelerate litter decomposition and the loss of labile C, as well as alter microbial biomass and function. (C) 2016 Elsevier B.V. All rights reserved.
DOI10.1016/j.ecoleng.2016.12.025
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被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.iga.ac.cn/handle/131322/7584
专题湿地与全球变化学科组
通讯作者Song ZC(宋长春)
推荐引用方式
GB/T 7714
Y. Y. Song, C. C. Song, H. N. Meng, C. M. Swarzenski, X. W. Wang and W. W. Tan,Song ZC. Nitrogen additions affect litter quality and soil biochemical properties in a peatland of Northeast China[J]. Ecological Engineering,2017,100:175-185.
APA Y. Y. Song, C. C. Song, H. N. Meng, C. M. Swarzenski, X. W. Wang and W. W. Tan,&宋长春.(2017).Nitrogen additions affect litter quality and soil biochemical properties in a peatland of Northeast China.Ecological Engineering,100,175-185.
MLA Y. Y. Song, C. C. Song, H. N. Meng, C. M. Swarzenski, X. W. Wang and W. W. Tan,et al."Nitrogen additions affect litter quality and soil biochemical properties in a peatland of Northeast China".Ecological Engineering 100(2017):175-185.
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