单 位：
定西市旱作农业研究所;甘肃农业大学农学院;甘肃省作物遗传改良与种质创新重点实验室
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
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45 mm具有超补偿效应,补灌90 mm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45 mm和90 mm是最优补灌方案和备选方案。
译 名：
Effects of Limited Supplemental Irrigation Using Harvested Rainfall on Rainfed Potato Yield and Water Use Efficiency
作 者：
QIN Shu-hao1,2,ZHANG Jun-lian1,2,WANG Di1,2,PU Yu-lin3,LIU Zhen1,2(1.Agronomy College,Gansu Agricultural University,Lanzhou 730070,China; 2.Gansu Key Laboratory of Crop Genetic & Germplasm Enhancement,Lanzhou 730070,China;3.Rainfed Agricultural Institute of Dingxi,Dingxi 743300,China)
关键词：
limited supplemental irrigation;rainfed potato;yield;water use efficiency(WUE);optimum period of supplementary irrigation;optimum amount of supplementary irrigation
摘 要：
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.
