播期对不同类型水稻生长及产量构成因素的影响

Effect of seeding time on growth and yield components in different rice types

通过分期播种,研究了不同播期对水稻生长和产量的影响.通过测定不同播期水稻抽穗期和成熟期的叶绿素、可溶性糖和氮的质量分数,分析不同播期对水稻生长的影响.结果表明Ⅰ期为两优培九和6两优9386最适宜播期,II期为II优084最适宜播期.播期对水稻单株穗数、每穗粒数、结实率、千粒重均有影响,尤其是对两优培九的结实率、6两优9386的每穗粒数有显著影响.研究结果可为合理利用南方气候资源、合理安排播栽播期、提高水稻产量提供理论依据和技术指导.

Effect of sowing date on rice growth and yield components were studied by sowing and transplanting on different dates in this study.The research were carried out in three rice types,named Liangyoupeijiu,6 Liangyou 9386 and IIyou 084.Rice growth and yield component indexes,such as chlorophyll,soluble sugar and nitrogen content,were measured during heading stage and maturity stage.Results show that date of May 25 is the most suitable sowing time for Liangyoupeijiu and 6 Liangyou 9386,while the date of June 12 is the most suitable sowing time for IIyou 084.The sowing date has influence on panicles per plant,grains per panicle,seed setting rate,grain weight.The effect is significant on seed setting rate of Liangyoupeijiu,and grains per panicle of 6 Liangyou 9386. This research will provide theoretical basis and technical reference for climate resource utilization,reasonable arrangements of seeding time and even rice yield improvement.