Effects of nitrogen fertilization on soil respiration in temperate grassland in Inner Mongolia, China

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	Effects of nitrogen fertilization on soil respiration in temperate grassland in Inner Mongolia, China
	Peng Qin ; Dong Yunshe ; Qi Yuchun ; Xiao Shengsheng ; He Yating ; Ma Tao
刊名	ENVIRONMENTAL EARTH SCIENCES
	2011
卷号	62 期号:2 页码:1163-1171
关键词	MICROBIAL BIOMASS CARBON-DIOXIDE FOREST ECOSYSTEMS HARVARD FOREST NORTHERN CHINA CO2 EFFLUX WATER PRECIPITATION DECOMPOSITION LIMITATION
通讯作者	Dong Yunshe
合作状况	其它
英文摘要	Nitrogen addition to soil can play a vital role in influencing the losses of soil carbon by respiration in N-deficient terrestrial ecosystems. The aim of this study was to clarify the effects of different levels of nitrogen fertilization (HN, 200 kg N ha(-1) year(-1); MN, 100 kg N ha(-1) year(-1); LN, 50 kg N ha(-1) year(-1)) on soil respiration compared with non-fertilization (CK, 0 kg N ha(-1) year(-1)), from July 2007 to September 2008, in temperate grassland in Inner Mongolia, China. Results showed that N fertilization did not change the seasonal patterns of soil respiration, which were mainly controlled by soil heat-water conditions. However, N fertilization could change the relationships between soil respiration and soil temperature, and water regimes. Soil respiration dependence on soil moisture was increased by N fertilization, and the soil temperature sensitivity was similar in the treatments of HN, LN, and CK treatments (Q (10) varied within 1.70-1.74) but was slightly reduced in MN treatment (Q (10) = 1.63). N fertilization increased soil CO2 emission in the order MN > HN > LN compared with the CK treatment. The positive effects reached a significant level for HN and MN (P < 0.05) and reached a marginally significant level for LN (P = 0.059 < 0.1) based on the cumulative soil respiration during the 2007 growing season after fertilization (July-September 2007). Furthermore, the differences between the three fertilization treatments and CK reached the very significant level of 0.01 on the basis of the data during the first entire year after fertilization (July 2007-June 2008). The annual total soil respiration was 53, 57, and 24% higher than in the CK plots (465 g m(-2) year(-1)). However, the positive effects did not reach the significant level for any treatment in the 2008 growing season after the second year fertilization (July-September 2008, P > 0.05). The pairwise differences between the three N-level treatments were not significant in either year (P > 0.05).
收录类别	SCI
资助信息	National Natural Science Foundation of China 40730105 40673067 40501072;Ministry of Science and Technology of China 2007BAC03A11
语种	英语
公开日期	2011-03-29
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/2172]
专题	地理科学与资源研究所_研究生部
推荐引用方式 GB/T 7714	Peng Qin,Dong Yunshe,Qi Yuchun,et al. Effects of nitrogen fertilization on soil respiration in temperate grassland in Inner Mongolia, China[J]. ENVIRONMENTAL EARTH SCIENCES,2011,62(2):1163-1171.
APA	Peng Qin,Dong Yunshe,Qi Yuchun,Xiao Shengsheng,He Yating,&Ma Tao.(2011).Effects of nitrogen fertilization on soil respiration in temperate grassland in Inner Mongolia, China.ENVIRONMENTAL EARTH SCIENCES,62(2),1163-1171.
MLA	Peng Qin,et al."Effects of nitrogen fertilization on soil respiration in temperate grassland in Inner Mongolia, China".ENVIRONMENTAL EARTH SCIENCES 62.2(2011):1163-1171.