摘要
[目的]探讨灌水下限低于浅湿调控灌溉时对水稻生长、产量及水分生产率的影响,以期为苏北平原沙土区水稻节水灌溉提供参考.[方法]以圣丰2优水稻为试验对象,采用田间测坑试验结合室内分析的方法研究4种土壤水分管理方式对苏北平原沙土区水稻产量及产量性状的影响(4种水分管理方式:W1浅湿调控灌溉、W2水分下限降低5个百分点、W3水分下限降低10个百分点、W4水分下限降低15个百分点).[结果]水分下限在一定范围内降低,能够抑制水稻株高的增加,提高水稻分蘖数,结实率、单株有效稳数和每穗实粒数也有所提高;与W1相比,W2、W3、W4的产量增减范围在5.00％以内,水稻产量不受显著影响;适当降低控水下限,在保证产量的同时并提高水分生产率.[结论]苏北平原沙土区水稻灌溉还有很大的节水空间.
Abstract
[Objective] The aim was to study the effects of irrigation lower limit below shallow wet control on rice growth,yield and water productivity,and provide reference for rice water-saving irrigation in sandy soil area.[Method] Taking Shengfeng 2 as test object,using field test pit experiment combined with laboratory analysis method,rice in sandy soil area of northern Jiangsu plain was studied by four soil water management modes(W1 shallow wet irrigation,W2 water lower limit reduced by 5％,W3 water lower limit reduced by 10％,W4 water lower limit reduced by 15％).[Result] The results showed that:lowering water within a certain range could inhibit the growth of plant height,improve rice tillers,seed rate,effective panicles per plant and grains per panicle also improved;compared with W1,the yield of W2,W3,W4 increase and decrease range was less than 5％,rice yield was not significantly affected;reducing water lower limit appropriately could ensure the production and increase water productivity.[Conclusion] There is a great water-saving space for rice irrigation in plain sandy soil area.
基金项目
江苏省水利科技项目(2015)
江苏省高等学校大学生创新创业训练计划项目(201510294002Y)
国家科技期刊平台
NSTL
维普
万方数据