播种期对粳型超级稻产量及叶面积指数的影响

Effect of Sowing Date on Yield and LAI of Supper Japonica Rice

以沈农265为研究对象,通过播种期和插秧密度2项处理,对群体叶面积指数、产量及产量构成因素的变化规律进行研究。得出以下结论:推迟播种期会显著降低有效穗数和结实率,从而使产量受到影响,增加插秧密度可增加有效穗数;随着播期的推迟,叶面积指数会受到明显的影响,播种过晚会因缩短生殖生长的时间而造成减产。

Using ＇Shennong 265＇ as material, effect of the two treatments of different sowing date and transplants density on LAI, yield and yield components was studied. The following conclusions were drawn, i.e., delaying sowing date decreased effective tillers per 667m^2 and seed-setting rate obviously, and the yield was affected. Increasing transplants density increased effective tillers per 667m^2. With the delaying of sowing date, LAI was affected obviously. If sowing date was too late, the yield was reduced for Reproduction Stage become shorter.