干旱地区农业研究2017，Vol.35Issue(1)：158-164,177,8.DOI:10.7606/j.issn.1000-7601.2017.01.24
绿洲膜下滴灌调亏马铃薯水分生产函数及灌溉制度优化
Water production function and optimization in irrigation schedule of potato with mulched drip irrigation under water deficit in oasis region
摘要
Abstract
A field experiment was conducted to test the potato periodic evapotranspiration and its influencing factors with mulched drip irrigation under water deficit regulation (WDR)in oasis irrigation region .Crop water production func-tion based on Jensen model was established,and the optimal irrigation schedule for potato was determined .The results showed that the sensitive index was found the largest at the tuber bulking stage,followed by the tuber initiation stage and relatively small at the establishment and potato starch accumulation stages .Potato yield was not decreased by low WDR plots during tuber initiation (P>0 .05),but was significantly decreased in the medium WDR plots during tuber initia-tion and low and medium WDR plots during tuber bulking (P<0 .05).The water use efficiency (WUE)was maintained in low WDR potato during tuber initiation,significantly improved by 6 .2%,8 .3% and 6 .7% from that in medium WDR plots during tuber initiation,low WDR plots during tuber bulking and full irrigation plots (CK),respectively . With the increase of crop evapotranspiration,the potato bulb yield became increased,while the water use efficiency was decreased .Crop evapotranspiration was increased by 22 .4%,the potato bulb yield was increased by 20 .4%and the WUE went decreased by 15 .7%.The optimal irrigation system established by genetic algorithm with crop water produc-tion function showed that the highest potato bulb yield (43 .86 t·hm-2)could be achieved when the irrigation depth was up to 225 mm in the Hexi oasis,and irrigation WUE was 19 .5 kg·m-2 .The recommended amount of irrigation is 30~40,130~140,170~190 mm and 25 mm at the stages of establishment,tuber initiation,tuber bulking and potato starch accumulation,respectively,and the irrigation intervals are 7 days .Therefore,when WDR under mulched drip ir-rigation reduces potato water consumption,the water use efficiency can be enhanced .Low WDR does not affect the potato yield during tuber initiation,reaching water-saving purposes .关键词
绿洲马铃薯/膜下滴灌/水分调亏/灌溉制度优化/产量/水分利用效率Key words
oasis potato/mulched drip irrigation/water deficit/optimal irrigation schedule/yield/water use effi-ciency分类
农业科技引用本文复制引用
杜嘉,张恒嘉,张明,巴玉春,杨晓婷,何鹏杰,李炫臻..绿洲膜下滴灌调亏马铃薯水分生产函数及灌溉制度优化[J].干旱地区农业研究,2017,35(1):158-164,177,8.基金项目
甘肃省高等学校基本科研业务费项目 （）
