Biophysical controls of soil respiration in a wheat-maize rotation system in the North China Plain | |
Tong, Xiaojuan1; Li, Jun2; Nolan, Rachael H.3; Yu, Qiang3,4,5 | |
刊名 | AGRICULTURAL AND FOREST METEOROLOGY
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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. |
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