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

doi:10.1016/j.agrformet.2017.07.005

	Biophysical controls of soil respiration in a wheat-maize rotation system in the North China Plain
	Tong, Xiaojuan 1; Li, Jun 2; Nolan, Rachael H.3; Yu, Qiang 3,4,5
刊名	AGRICULTURAL AND FOREST METEOROLOGY
	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
DOI	10.1016/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.
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关键词	CARBON-DIOXIDE FLUX ; CO2 EFFLUX ; ECOSYSTEM RESPIRATION ; WINTER-WHEAT ; TEMPERATURE SENSITIVITY ; FOREST SOIL ; HETEROTROPHIC RESPIRATION ; SEASONAL-VARIATIONS ; MICROBIAL BIOMASS ; ORGANIC-CARBON
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000408782000021
资助机构	National Natural Science Foundation of China ; Fundamental Research Funds for Central Universities
内容类型	期刊论文
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.Beijing Forestry Univ, Coll Forestry, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 3.Univ Technol Sydney, Sch Life Sci, POB 123, Broadway, NSW 2007, Australia 4.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Fanning Loess P, Yangling 712100, Shaanxi, Peoples R China 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.