氮肥不同施入量对水稻新品种盐粳1403产量的影响

The Effect of Different Application of Nitrogen Fertilizer on the Yield of Yanjing-1403

采用随机区组试验方法,探讨了氮肥施入量180、225、270、315、360 kg/hm^2对水稻新品种盐粳1403产量的影响。结果表明,施氮量为315 kg/hm^2处理获得单产8 709 kg/hm^2,比360、270、225、180 kg/hm^2处理分别增加了0.78%、3.09%、7.62%、13.51%。随着施氮量的增加,各处理主茎叶片数、单位面积最高茎蘖数、收获穗数、齐穗期叶面积指数、剑叶净光合速率及成熟期干物质积累量随之增加;各处理茎蘖成穗率、有效叶面积率、齐穗后干物质积累量占籽粒产量百分比、收获指数、结实率、千粒重随之降低;各处理每穗成粒数、齐穗期高效叶面积率则表现为先增后减。上述结果为盐粳1403高产高效栽培技术提供了技术支撑。

The effect of different application of nitrogen fertilizer which were180、225、270、315、360kg/hm2on the yield of Yanjing-1403was researched by the method of randomized block group test.the result indicated that the yield of treatment which was315kg/hm2was8709kg/hm2that increase0.78%、3.09%、7.62%、13.51%than the treatment of360、270、225、180kg/hm2.the maximum tiller number per unit area,the leaf numbers of main stem,harvest spikelets,leaf area index of panicle stage,the net photosynthetic rate of the blade and the dry matter accumulation of mature stage increased with nitrogen increased.The earbearing tiller percentage,effective leaf area ratio,the percenage of dry matter accumulation in grain yield,harvest index,setting percentage and thousand seed weight decreased with nitrogen increased.The grains of per ear,the high efficiency leaf area rate of panicle stage increased at first and then decreased.The results provided technical support for high yield and efficient cultivation techniques on Yanjing-1403.