排灌机械工程学报
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Journal of Drainage and Irrigation Machinery Engin  2018, Vol. 36 Issue (8): 767-772    DOI: 10.3969/j.issn.1674-8530.18.1014
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Soil respiration characteristics and its influencing factors in cotton fields under mulched drip irrigation
LIU Fangting1,2, FAN Wenbo1,2*, ZHANG Jinxi1,2, JIANG Yu1,2, YANG Haimei1,2, DONG Qianqian1,2, LI Changxiao1,2
1.College of Water & Architecture Engineering, Shihezi University, Shihezi, Xinjiang 832003, China; 2.Key Laboratory of Modern Water-saving Irrigation of Xinjiang Production & Construction Group, Shihezi University, Shihezi, Xinjiang 832003, China
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Abstract To study the dynamic changes of soil respiration and its impact factors of cotton fields under mulched drip irrigation, during growth periods of cotton, adopting Li-8100A automatic determination of soil carbon flux, soil respiration rate and environment factors on the ridge were continuously observed, in the ridge and bare land. The results show that the daily variation of soil respiration rate of the three samples expresse a single peak curve, and the peak appeares at 14:30. The soil respiration rate of the three samples increases first and then decreases with the seasonal change, and the soil respiration rate reaches the highest level in the middle and late July. The soil respiration rate and soil organic carbon quality ratio of the three sample plots are significantly different, the sequence of which from high to low is on the ridge, in the ridge and bare land, and the total amount of soil respiration on the ridge is the largest, which is 1.5 times and 2.8 times that in the ridge and bare land, while the sequence of soil temperature difference from high to low is bare land, on the ridge, in the ridge. According to the research by the method of correlation analysis, the correlation between soil respiration rate and soil moisture content is weak, but it is positively correlated with soil organic carbon quality ratio. Soil temperature can explain the variability of soil respiration rate from 75.1% to 84.4% and show a higher exponential positive correlation. The sensitivity of soil respiration to temperature is significantly different in three types of soil, the sequence of which from high to low is on the ridge(2.208), in the ridge(2.160)and bare land(1.675).
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Articles by authors
LIU Fang-Ting-
FAN Wen-Bo-
*
ZHANG Jin-Xi-
JIANG Yu-
Yang-Hai-Mei-
DONG Qian-Qian-
LI Chang-Xiao-
Key wordscotton field   soil respiration   soil temperature   soil moisture   soil organic carbon     
Received: 2018-03-20;
Cite this article:   
LIU Fang-Ting-,,FAN Wen-Bo- et al. Soil respiration characteristics and its influencing factors in cotton fields under mulched drip irrigation[J]. Journal of Drainage and Irrigation Machinery Engin, 2018, 36(8): 767-772.
 
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