水分管理对杂交籼稻产量和群体质量的影响

Effects of Water Management on Yield and Population Quality of Indica Hybrid Rice

为探索不同水分管理模式对杂交籼稻产量及中后期群体质量的影响,进行4种不同水分管理模式(全生育期湿润灌溉、全生育期常规淹水、够苗前浅水+中期搁田+抽穗结实期干湿交替、够苗前浅水+中期搁田+抽穗结实期浅水)试验。结果表明:够苗前浅水+中期搁田+抽穗结实期干湿交替管理模式的有效穗、结实率和产量均最高,分别为18.0万穗/667m^2、90.2%和787.0kg/667m^2;穗粒数和千粒重在4种水分管理模式中差异不显著。移栽至有效分蘖临界叶龄期(N-n),所有处理茎蘖数增加较快,全生育期常规淹水处理的高峰苗多、成穗数低,全生育期湿润灌溉使植株高度降低。

In order to explore the effects of different water management patterns on yield and population quality of indica hybrid rice in the middle and late stages, four different water management models, including wetting irrigation during the whole growth period（WGPM）, conventional flooding during the whole growth period（WGPF）, shallow water before seedling-enough＋draining water in midterm＋dry-wet alternation in heading and bearing stage（SW＋MD＋LM）, shallow water before seedling-enough＋draining water in midterm＋shallow water in heading and bearing stage（SW＋MD＋LF）, were carried out. Results： The effective panicle, seed setting rate and yield were the highest in SW＋MD＋LM with 180 000 ear/667m^2 .90.2% and 787.0 kg/667m^2 respectively, but there were no significant differences in the number of grains per spike and 1000-grain weight among the four water management models. From transplanting to the critical leaf age （N-n） of effective tillers, the number of tillers increased rapidly in all treatments, WGPF was of more peak seedlings and less spikes, and the plant height of WGPM decreased.