施氮量对不同秧苗素质垦粳5号产量的影响

The Effect of Nitrogen Content on the Yield of Kendao-5 with Different Seedling Quality

为明确氮肥施用量对弱苗、壮苗移栽后产量的影响,以黑龙江垦区常规稻品种垦粳5号为供试材料,采用完全随机试验设计,在黑龙江八一农垦大学进行,结果如下:不施氮肥时,壮苗的单位面积穗数、穗粒数、结实率、千粒重、产量均高于弱苗。弱苗除结实率外,其余各指标均随施氮量增加逐渐上升;壮苗除穗数在高氮肥条件下有所下降外,其余指标均呈上升趋势。在施氮量225～300 kg/hm^2条件下,壮苗与弱苗产量差异均达到极显著水平。

The test about effect of nitrogen content on the yield of Kendao-5 with different seedling quality- were made in Heilongjiang August 1 Agriculture University by means of complete random design. The result indicated that spike number per planting area, the grain number per ear, the setting percentage, thousand grain weight and yield of strong seedlings were higher than weak seedlings under the condition of Non-nitrogen fertilizer. The physiological indexes of weak seedlings increased with nitrogen increased except the setting percentage. The physiological indexes of strong seedlings increased under the condition of high nitrogen treatment except the spike number per planting area. The yield difference reached an extremely remarkable level between the strong seedlings and weak seedlings under the nitrogen application condition of 225-300 kg/hm2.