不同生育阶段水分控制对浅湿间歇灌溉水稻株高及产量的影响

Study on the Effect of Water Control in Different Growth Stages on Paddy Height and Yield under Shallow-wet Intermittent Irrigation System

[目的]研究不同生育阶段水分控制对浅湿间歇灌溉水稻株高及产量的影响。[方法]采用田间试验与室内分析相结合的试验方法,在水稻浅湿间歇灌溉条件下,在不同生育阶段进行水分控制,研究水稻株高及产量的变化情况。[结果]浅湿间歇灌溉处理下的水稻株高比常规灌溉118.1 cm要小,分别为93.1、98.2、109.2、100.5、109.3、101.5 cm,因此水稻具有较强的抗倒伏性;对最终产量来说,常规灌溉下水稻产量最高,全程浅水灌溉产量最低。分蘖期、拔节孕穗期、乳熟期分别进行水分控制的水稻平均产量分别为5 702.0、7 208.0、6 046.5 kg/hm2。[结论]水稻前后期生产中水分条件显得尤为重要,中期可进行适度的水分亏缺。

[ Objective] The research aimed to study the effect of water control in different growth stages on paddy height and yield under shal- low-wet intermittent irrigation system. [ Method] Through field experiment and laboratory analysis, we conducted a research on paddy height and yield changes while controlling water condition in different growth stages under intermittent irrigation. [ Result] Paddy heights under intermittent irrigation were respectively 93.1, 98.2, 109.2, 100.5, 109.3 and 101.5 cm, which were lower than that in conventional irr/gation, saying 118.1 cm. Thus the paddy could resist lodging. As for the final actual rice yield, the treatment under conventional irrigation was the highest, while the whole shallow irrigation was the lowest. The yields under water control in tillering stage, joint-booting stage and milky stage were respectively 5 702.0, 7 208.0 and 6 046.5 kg/hm^2. [ Conclusion] It meant that the water condition was especially important in the early and late periods during rice production, and a moderate water deficiency was possible in the middle period.