Impacts of nitrogen addition on the carbon balance in a temperate semiarid grassland ecosystem
Impacts of nitrogen addition on the carbon balance in a temperate semiarid grassland ecosystem
复制标题
氮添加对温带半干旱草原生态系统碳平衡的影响
DOI:
10.1007/s00374-017-1233-x
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发表时间:
2017-08
影响因子:
6.5
通讯作者:
Baoyin Taoge tao
中科院分区:
文献类型:
--
作者:
Luo Qinpu;Gong Jirui;Yang Lili;Li Xiaobing;Pan Yan;Liu Min;Zhai Zhanwei;Baoyin Taoge tao
Understanding carbon (C) cycling and sequestration in vegetation and soils, and their responses to nitrogen (N) deposition, is important for quantifying ecosystem responses to global climate change. Here, we describe a 2-year study of the C balance in a temperate grassland in northern China. We measured net ecosystem CO2exchange (NEE), net ecosystem production (NEP), and C sequestration rates in treatments with N addition ranging from 0 to 25 g N m−2year−1. High N addition significantly increased ecosystem C sequestration, whose rates ranged from 122.06 g C m−2year−1(control) to 259.67 g C m−2year−1(25 g N). Cumulative NEE during the growing season decreased significantly at high and medium N addition, with values ranging from −95.86 g C m−2(25 g N) to 0.15 g C m−2(5 g N). Only the highest N rate increased significantly cumulative soil microbial respiration compared with the control in the dry 2014 growing season. High N addition significantly increased net primary production (NPP) and NEP in both years, and NEP ranged from −5.83 to 128.32 g C m−2. The C input from litter decomposition was significant and must be quantified to accurately estimate NPP. Measuring C sequestration and NEP together may allow tracking of the effects of N addition on grassland C budgets. Overall, adding 25 or 10 g N m−2year−1improved the CO2sink of the grassland ecosystem, and increased grassland C sequestration.
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影响因子:
6.5
作者:
M. Wiesmeier;M. Steffens;A. Kölbl;I. Kögel‐Knabner
通讯作者:
M. Wiesmeier;M. Steffens;A. Kölbl;I. Kögel‐Knabner
影响因子:
4.9
作者:
M. Volk;J. Enderle;S. Bassin
通讯作者:
M. Volk;J. Enderle;S. Bassin
影响因子:
3.7
作者:
He N;Yu Q;Wang R;Zhang Y;Gao Y;Yu G
通讯作者:
Yu G
影响因子:
11.6
作者:
Jianyang Xia;Shiqiang Wan;Shuli Niu
通讯作者:
Shuli Niu
影响因子:
4
作者:
P. Vitousek;R. Howarth
通讯作者:
P. Vitousek;R. Howarth