不同节水灌溉模式对水稻分蘖、株高及产量的影响

Effects of Different Water-saving Irrigation Modes on Rice Tillering,Height and Yield in Cold Area

通过两年试验对黑龙江省主要稻区现行的3种节水灌溉模式及淹水灌溉进行综合研究,重点分析了灌溉模式对水稻分蘖、株高及产量指标的影响,得出了以下结论:4种灌溉模式中,湿润灌溉有效分蘖率最高,淹灌最低,控制灌溉与间歇灌溉相差不大;各灌溉模式株高变化趋势相同,都在乳熟期达到最大值,之后略微有所下降,在拔孕期以前,淹灌株高一直大于其余3种灌溉模式株高。在抽开期、乳熟期及黄熟期,则是湿润灌溉株高大于其余3种灌溉模式,而淹灌株高则小于其余3种灌溉模式;湿润灌溉的最终的产量最高,间歇灌溉次之,淹灌最低。

Three water-saving irrigation modes, which are widely applied in cold area, are comprehensively analyzed in this paper. The focus is on the effects of different irrigation modes on rice tillering, height and yield indexes. The results are as following. Wet irrigation has the highest effective tillering, while flood irrigation has the lowest one. All of the irrigation modes have the same plant height change trend. The plant height is up to the maximum at milky stage and becomes smaller at ripe stage. Before jointing-booting stage, the plant height under flood irrigation is always higher than that under other irrigation modes. After jointing-booting stage, the plant height under wet irrigation is always higher than that under other irrigation modes, while the plant height under flood irri- gation is always lower than that under other irrigation modes. The yield of wet irrigation is the highest, that of intermittent irrigation is the second, and that of flood irrigation is the lowest.