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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
2011
Source PublicationENVIRONMENTAL EARTH SCIENCES
Volume62Issue:2Pages:1163-1171
Corresponding AuthorDong Yunshe
AbstractNitrogen 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).
KeywordMicrobial Biomass Carbon-dioxide Forest Ecosystems Harvard Forest Northern China Co2 Efflux Water Precipitation Decomposition Limitation
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China 40730105 40673067 40501072;Ministry of Science and Technology of China 2007BAC03A11
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/2172
Collection研究生部
Corresponding AuthorDong Yunshe
Recommended Citation
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.
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