摘要
在大田条件下研究了集雨有限补偿灌溉对旱区马铃薯产量及水分利用效率的影响。结果表明，补灌能显著提高旱作马铃薯的产量、水分利用效率和经济系数。与对照相比，补灌处理产量增幅在3．99％～21．21％之间，苗期补灌产量高于薯块膨大期补灌，苗期补灌45mm具有超补偿效应，补灌90mm具有高补偿效应。低定额补灌有利于水分利用效率和灌水利用效率的提高，且苗期补灌高于薯块膨大期补灌。补灌明显降低了薯块小薯率而提高了大薯率和中薯率，另外单株薯重也提高了，单株薯重与大薯率对马铃薯的产量贡献最大。综合分析认为苗期补灌45mm和90mm是最优补灌方案和备选方案。
Field experiments were conducted to study effects of limited supplemental irrigation using harvested rainfall on potato yield and water use efficiency in rainfed areas. The results showed that supplemental irrigation could increase potato yield and water use efficiency significantly. Compared with control, supplemental irrigation increased the yield by 3.99 %-21.21 %, and its effect was greater at seedling stage than tuber expanding period. 45 mm irrigation at seedling stage had super compensation effect. Lower supplemental irrigation could increase WUE and irrigating water use efficiency, and its effect was greater at seedling stage. As for tuber size, supplemental irrigation could increase number of middle and bigger ones, and decrease the number of smaller ones. Tuber yield per plant was increased by supplemental irrigation significantly as well. Therefore, 45 mm of supplemental irrigation at seedling stage is the best choice for potato production in the area.
出处
《灌溉排水学报》
CSCD
北大核心
2009年第4期93-95,共3页
Journal of Irrigation and Drainage
基金
国家科技支撑计划(2006BA021B05)
农业部行业专项(nyhy2X07-006)
关键词
集雨限灌
旱作马铃薯
产量
水分利用效率
最佳补灌时期
适宜补灌量
limited supplemental irrigation
rainfed potato
yield
water use efficiency （WUE）
optimum period of supplementary irrigation
optimum amount of supplementary irrigation
