排灌机械工程学报
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排灌机械工程学报  2018, Vol. 36 Issue (8): 767-772    DOI: 10.3969/j.issn.1674-8530.18.1014
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膜下滴灌棉田土壤呼吸特征及其影响因素
刘芳婷1,2, 范文波1,2*, 张金玺1,2, 江煜1,2, 杨海梅1,2, 董倩倩1,2, 李长晓1,2
1.石河子大学水利建筑工程学院, 新疆 石河子 832003; 2.石河子大学现代节水灌溉兵团重点实验室, 新疆 石河子 832003
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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摘要 为探讨膜下滴灌条件下棉田土壤呼吸的动态变化及其影响因子,在棉花生长期采用Li-8100A土壤碳通量自动测定仪连续观测垄上、垄间和裸地土壤呼吸速率及环境因子.结果表明:3种样地的土壤呼吸速率日变化均表现为单峰型曲线,峰值出现在14:30;月变化呈现先升高后降低的趋势,7月中下旬土壤呼吸速率最高.3种样地的土壤呼吸速率和土壤有机碳质量比差异性显著,由高到低依次为垄上、垄间、裸地,且垄上的土壤呼吸总量最大,是垄间和裸地的1.5倍和2.8倍,而土壤温度的差异性由大到小依次为裸地、垄上、垄间.采用相关分析法研究表明,土壤呼吸速率与土壤含水率的相关性较弱,与土壤有机碳质量比呈显著正相关.土壤温度能够解释土壤呼吸速率变异性的75.1%~84.4%,两者表现出较高的指数正相关关系;3种样地的土壤呼吸对温度的敏感系数差异显著,敏感系数由大到小依次为垄上(2.208)、垄间(2.160)、裸地(1.675).
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刘芳婷
范文波
*
张金玺
江煜
杨海梅
董倩倩
李长晓
关键词棉田   土壤呼吸   土壤温度   土壤含水率   土壤有机碳     
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).
Key wordscotton field   soil respiration   soil temperature   soil moisture   soil organic carbon   
收稿日期: 2018-03-20;
基金资助:

国家自然科学基金资助项目(51569028)

引用本文:   
刘芳婷,,范文波等. 膜下滴灌棉田土壤呼吸特征及其影响因素[J]. 排灌机械工程学报, 2018, 36(8): 767-772.
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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