施氮量对不同秧苗素质垦粳5号群体质量的影响

Effect of Nitrogen Application Rate on Population Quality of Kengeng-5 with Different Seedling Quality

为明确氮肥施用量对壮苗、弱苗移栽后群体质量的影响,以垦粳5号为供试品种,试验采用完全随机设计,在黑龙江八一农垦大学进行,结果如下:壮苗、弱苗的株高、颖花量、干物质量、叶面积指数等均随着施氮量增加逐渐升高,在施氮量300 kg/hm^(2)条件下达到最大。弱苗、壮苗的粒叶比分别在施氮量150 kg/hm^(2)、225 kg/hm^(2)条件下最大,弱苗茎蘖成穗率在施氮量225 kg/hm^(2)条件下最高,壮苗则在施氮量300 kg/hm^(2)条件下最高。

In order to clarify the effect of nitrogen application rate on the population quality of strong and weak seedlings after transplanting,Kengeng-5 was used as the test variety,and the experiment was conducted in Heilongjiang Bayi Agricultural University by completely random design.The results were as follows:The plant height,spikelets,dry matter weight and leaf area index of strong and weak seedlings increased gradually with the increase of nitrogen application rate,and reached the maximum under the condition of nitrogen application rate of 300 kg/hm^(2).The grain to leaf ratio of weak and strong seedlings was the highest under n application rate of 150 kg/hm^(2)and 225 kg/hm^(2),respectively.The tiller formation rate of weak seedlings was the highest under n application rate of 225 kg/hm^(2),while that of strong seedlings was the highest under N application rate of 300kg/hm^(2).