Effects of Controlled Irrigation on Rice Growth and Yield in Jointing-Booting and Flowering Stage
Abstract：In order to apply the controlled irrigation technique for rice more reasonably,the effect of controlled irrigation in a single growing stage on rice growth and yield was studied.Water control was launched in jointing-booting stage and flowering stage respectively,and in each stage,three lower limit of soil water content（70%,80%,and 90%,respectively） was controlled.The results showed that compared to check treatment,water control at jointing-booting stage did not apparently change effective panicle number per hole and 1000-grain weight;grains per panicle and filled grain number per panicle decreased significantly while yield had a slightly decreasing tendency;water control at flowering stage had little effect on rice growth and yield,changes of physiological indexes were insignificant.Controlled irrigation applied at jointing-booting stage saved more irrigation than that conducted at flowering stage,but controlled irrigation at flowering stage could get higher irrigation water use efficiency.Therefore,small control at jointing-booting stage and big control at flowering stage would be beneficial to water saving and increasing yield.
Keywords：controlled irrigationrice growing characteryieldwater use efficiencycritical growing stageirrigation system
Publication Date：2012-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 78-82 )