农业机械学报2018，Vol.49Issue(3)：252-260,9.DOI:10.6041/j.issn.1000-1298.2018.03.030
调亏灌溉下滴灌玉米植株与土壤水分及节水增产效应
Effects of Soil Water, Plant, Water Saving and Yield Increasing of Maize under Regulated Deficit Drip Irrigation
摘要
Abstract
Regulated deficit irrigation is through active exerting a certain degree of water stress artificially,exercising the crop drought resistance,affecting their physiological and biochemical process,in order to achieve the goal of saving water and increasing production.Taking maize as research object,the experiment was carried out in micro test pit area,and the influences on soil water distribution,root length,root length,root number,yield and crop water utilization efficiency were studied under drip irrigation on ground.Five different treatments (C1,C2,C3,C4 and C5) were set,which were slight and moderate regulated deficit in seeding and jointing stage,separately,and moderate regulated deficit in seeding stage while slight regulated deficit in jointing stage in 2016,and the whole growth period with suitable irrigation (CK) was set as control treatment.The result showed that the final water content of filtration cake in the crown of the maize was increased by-6.03％ ～ 4.61％ and 1.30％ ～8.15％ in the root.At the same time,the yield of C1,C4 and C5 was decreased by 7.89％,23.47％ and 28.13％,respectively,while that of C2 and C3 was increased by 5.20％ and 1.49％,respectively,water use efficiency was improved by 0.33％,26.25％,18.27％,6.64％ and 16.94％,respectively,and five treatments saved 8.26％,16.71％,14.07％,28.35％ and 38.54％ of water,respectively.The moderate treatment in seeding stage and the mild treatment in jointing stage were the appropriate water deficit treatments for maize under drip irrigation in water saving and production increasing.The result was of practical significance to guide the establishment of reasonable irrigation system for maize in western area of Heilongjiang Province.关键词
玉米/调亏灌溉/滴灌/湿基含水率/根系参数/产量Key words
maize/regulated deficit irrigation/drip irrigation/water content of filtration cake/root parameters/yield分类
农业科技引用本文复制引用
魏永霞,马瑛瑛,刘慧,张雨凤,杨军明,张奕..调亏灌溉下滴灌玉米植株与土壤水分及节水增产效应[J].农业机械学报,2018,49(3):252-260,9.基金项目
国家重点研发计划项目(2016YFC0400101)和“十二五”国家科技支撑计划项目(2014BAD12B01) （2016YFC0400101）
