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Biophysical controls of soil respiration in a wheat-maize rotation system in the North China Plain

文献类型：期刊论文

作者Tong, Xiaojuan2; Li, Jun3; Nolan, Rachael H.4; Yu, Qiang1,4,5
刊名AGRICULTURAL AND FOREST METEOROLOGY
出版日期2017-11-15
卷号246页码:231-240
关键词Soil respiration Ecosystem respiration Gross primary productivity Temperature sensitivity Leaf area index
ISSN号0168-1923
DOI10.1016/j.agrformet.2017.07.005
通讯作者Tong, Xiaojuan(tongxj@bjfu.edu.cn) ; Li, Jun(lijun@igsnrr.ac.cn)
英文摘要Croplands play a vital role in regional carbon budgets. We hypothesized that biophysical factors would be important for soil respiration in a wheat-maize rotation cropping system. Soil CO2 efflux was measured using the closed chamber method, and net CO2 exchange between the cropland and the atmosphere obtained by the eddy covariance technique in a winter wheat-summer maize double cropping system over four years (Oct 2002-Oct 2006). In addition to soil temperature, soil respiration was controlled by leaf area index and soil moisture in the wheat field and soil moisture in the maize field. Temperature sensitivity (Q(10)) of soil respiration was 2.2 in the wheat and maize growing seasons. In the wheat field, the Q(10) value during the sowing-returning green period (4.9) was more than that during the returning green-ripening period (2.0). On a monthly time scale, soil respiration was controlled by gross primary productivity in the wheat field, indicating that soil respiration was coupled with ecosystem photosynthesis. Annual soil respiration was 825 +/- 73g C m(-2) in the wheat-maize rotation system in 2003-2006. Over a 4-year average, soil respiration was 355 +/- 50 g C m(-2) in the wheat growing season and 470 +/- 67 g C m(-2) in the maize growing season, which accounted for 43% and 57% of the annual value respectively. At an annual time scale, soil respiration contributed to 72% of ecosystem respiration in the winter wheat-summer maize double cropping system.
WOS关键词CARBON-DIOXIDE FLUX ; CO2 EFFLUX ; ECOSYSTEM RESPIRATION ; WINTER-WHEAT ; TEMPERATURE SENSITIVITY ; FOREST SOIL ; HETEROTROPHIC RESPIRATION ; SEASONAL-VARIATIONS ; MICROBIAL BIOMASS ; ORGANIC-CARBON
资助项目National Natural Science Foundation of China[31570617] ; National Natural Science Foundation of China[31100322] ; Fundamental Research Funds for Central Universities[YX2011-19]
WOS研究方向Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
语种英语
WOS记录号WOS:000408782000021
出版者ELSEVIER SCIENCE BV
资助机构National Natural Science Foundation of China ; Fundamental Research Funds for Central Universities
源URL[http://ir.igsnrr.ac.cn/handle/311030/61732]  
专题中国科学院地理科学与资源研究所
通讯作者Tong, Xiaojuan; Li, Jun
作者单位1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Fanning Loess P, Yangling 712100, Shaanxi, Peoples R China
2.Beijing Forestry Univ, Coll Forestry, Beijing 100083, Peoples R China
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
4.Univ Technol Sydney, Sch Life Sci, POB 123, Broadway, NSW 2007, Australia
5.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Tong, Xiaojuan,Li, Jun,Nolan, Rachael H.,et al. Biophysical controls of soil respiration in a wheat-maize rotation system in the North China Plain[J]. AGRICULTURAL AND FOREST METEOROLOGY,2017,246:231-240.
APA Tong, Xiaojuan,Li, Jun,Nolan, Rachael H.,&Yu, Qiang.(2017).Biophysical controls of soil respiration in a wheat-maize rotation system in the North China Plain.AGRICULTURAL AND FOREST METEOROLOGY,246,231-240.
MLA Tong, Xiaojuan,et al."Biophysical controls of soil respiration in a wheat-maize rotation system in the North China Plain".AGRICULTURAL AND FOREST METEOROLOGY 246(2017):231-240.

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来源：地理科学与资源研究所

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