农业机械学报2017，Vol.48Issue(7)：180-188,9.DOI:10.6041/j.issn.1000-1298.2017.07.023
调亏灌溉下滴灌玉米根冠生长与水分动态响应特征
Characteristics of Water Dynamic Response and Growth of Root and Crown of Maize under Drip Irrigation of Regulated Deficit Irrigation
摘要
Abstract
The experiment with micro plots under automatically inductive type of rain preventing condition was carried out to analyze the influence of regulated deficit irrigation on root and crown growth,characteristics of dry matter distribution,water consumption,root-shoot ratio and the wound flow of maize plant.Choosing the relative water content (the percent of field water-holding rate) of soil as the upper and lower controlling limits,five treatments of water deficit were set,which were respectively the mild treatment (60％ ～ 70％ FC) and the moderate treatment (50％ ～ 60％ FC) at seedling stage,the mild treatment (60％ ～ 70％ FC) and the moderate treatment (50％ ～ 60％ FC) at jointing stage,moderate treatment at seedling stage and mild treatment at jointing stage,and the appropriate water content (70％ ～80％ FC)was set as control in the whole growth period.The result showed that the regulated deficit irrigation did not change the total tendency of growth of root and crown of maize and the basic tendency of the growth of different organs in crown,but it increased the root-shoot ratio of plant and the distribution ratio of dry matters to ear in later stage of growth obviously,accelerated the transportation and distribution of photoassimilate to reproductive organs and enhanced the compensatory growth of root and crown after rehydration.The mild and moderate treatments at seedling stage of maize sustained higher root quality during deficit period,remarkably increased the root activity after rehydration,showed super compensatory effect of wound flow,kept higher wound flow at filling stage and sustained higher root-shoot ratio in later growth period,which was the appropriate water deficit treatment for coordinating the relationship of the growth of root and crown of maize.关键词
玉米/调亏灌溉/干物质分配率/根冠比/伤流量/耗水量Key words
maize/regulated deficit irrigation/distribution rate of dry matter/root-shoot ratio/wound flow/water consumption分类
农业科技引用本文复制引用
魏永霞,马瑛瑛,冯鼎瑞,熊建,张雨凤,张翼鹏..调亏灌溉下滴灌玉米根冠生长与水分动态响应特征[J].农业机械学报,2017,48(7):180-188,9.基金项目
“十二五”国家科技支撑计划项目(2014BAD12B01) （2014BAD12B01）
