| 滴灌条件下土壤基质势对豇豆产量和灌溉水利用效率的影响 |
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| 引用本文： | 张超,康跃虎,万书勤,刘士平.滴灌条件下土壤基质势对豇豆产量和灌溉水利用效率的影响[J].灌溉排水学报,2010,29(4). |
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| 作者姓名： | 张超 康跃虎 万书勤 刘士平 |
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| 基金项目： | 北京市科技计划课题，国家科技支撑计划课题，中国科学院百人计划(康跃虎) |
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| 摘 要： | 研究了华北半湿润区滴灌条件下不同土壤基质势对露地栽培豇豆产量和灌溉水利用效率的影响。试验共有5个处理,分别控制滴头正下方0.2 m深度处土壤基质势下限高于-10、-20、-30、-40和-50 kPa。研究分析发现,土壤基质势对豇豆的产量没有明显的影响,并且随着土壤基质势控制的降低,豇豆整个生育期的灌水量明显降低,灌溉水利用效率显著升高。因此,在华北半湿润区,在保证豇豆安全度过苗期之后,可以通过控制滴头正下方0.2 m深度处土壤基质势下限高于-50 kPa来制定豇豆的滴灌灌溉计划。
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| 关 键 词： | 滴灌 豇豆 土壤基质势 灌溉水利用效率 |
Effects of Soil Matric Potential on Cowpea Yield and Irrigation Water Use Efficiency under Drip Irrigation |
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| ZHANG Chao,KANG Yue-hu,WAN Shu-qin,LIU Shi-ping.Effects of Soil Matric Potential on Cowpea Yield and Irrigation Water Use Efficiency under Drip Irrigation[J].Journal of Irrigation and Drainage,2010,29(4). |
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| Authors: | ZHANG Chao KANG Yue-hu WAN Shu-qin LIU Shi-ping |
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| Abstract: | An experiment was carried out to investigate the effects of soil matric potential on field-grown cowpea yield and irrigation water use efficiency under drip irrigation in semi-humid areas of north China.The experiment included five treatments,which controlled soil matric potential at 0.2 m depth immediately under drip emitters controlled higher than-10 kPa,-20 kPa,-30 kPa,-40 kPa and-50 kPa,respectively.The results indicated that there were no significant differences on cowpea yield among different soil matric potential treatments.With the decreasing of soil matric potential,seasonal irrigation amount decreased,and irrigation water use efficiency increased obviously.So it is recommended that if cowpeas are well irrigated during establishment,controlling the soil matric potential at 0.2 m depth immediately under drip emitters above-50 kPa can be used as an indicator for drip irrigation scheduling during following period of cowpea growth in semi-humid areas of north China. |
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| Keywords: | drip irrigation cowpea soil matric potential irrigation water use efficiency |
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