干旱地区农业研究2012，Vol.30Issue(1)：54-60,7.
膜下滴灌条件下土壤基质势对辣椒产量和水分利用效率的影响
Effects of soil matric potential on yield and water use efficiency of hot pepper under mulched drip irrigation
摘要
Abstract
For increasing water use efficiency in the arid areas of Northwest China, a field experiment was conduct-ed to study the effects of different soil matric potentials(SMP) on pepper yield, water consumption and water use efficien-cy under mulched drip irrigation. Five treatments were evaluated based on the soil matric potentials at 25 cm depth, and they were - 10 kPa, - 20 kPa, - 30 kPa, - 40 kPa and - 50 kPa. The measured data included meteorological ele-ments, soil water characteristic curves, soil matric potential, soil water content, yield and the weight of each pepper fruit. The results showed that controlling SMPs between - 10 kPa and - 40 kPa made minor effect on pepper yield, while pepper yield decreased greatly for controlling SMP of - 50 kPa. Crop evaportranspiration and irrigation water amount dropped with the decreasing of SMP. Water use efficiency increased first with the decreasing of SMP and dropped then as controlling SMP of - 50 kPa. Crop yield and water use efficiency were higher for controlling SMP of - 30 kPa to - 40 kPa. Therefore, a SMP range of - 30 kPa to - 40 kPa was recommended for scheduling drip-irrigated pepper un-der plastic mulching condition in the arid areas of Northwest China.关键词
西北旱区/辣椒/膜下滴灌/腾发量/土壤基质势Key words
arid areas in Northwest China/ hot pepper/ mulched drip irrigation/ evaportranspiration/ soil matric potential分类
农业科技引用本文复制引用
杨会颖,刘海军,李艳,郑建华,贾冬冬,黄冠华,王凤新..膜下滴灌条件下土壤基质势对辣椒产量和水分利用效率的影响[J].干旱地区农业研究,2012,30(1):54-60,7.基金项目
水利邵行业公益基金项目(200801104) （200801104）
黄土高原土壤侵蚀与旱地农业国家重点实验室基金(10501-260) （10501-260）
国家自然科学基金项目(51179005) （51179005）
