密度和氮肥运筹对宁粳3号产量及其构成因素的影响

在大田栽培条件下,设置移栽密度和施氮量试验,分析在不同移栽密度和施氮量条件对宁粳3号单位面积产量及产量构成因素的影响。结果表明:330 kg/hm2施氮水平单位面积产量最高,300 kg/hm2施氮水平其次;移栽密度以45×104/hm2基本苗单位面积产量最高,其次为22.5×104/hm2基本苗;总颖花量的增加是提高宁粳3号产量的决定性因素;宁粳3号最适宜移栽密度是45×104/hm2,施氮量是330 kg/hm2。

Effects of Planting Density and Nitrogen Application on Yield and its Components of Ningjing 3

The effects of planting density and nitrogen application on yield and yield components of ningjing 3 were studied.The results were as follows:The grain output of nitrogen with 330 kg/hm2 was the highest,that with 330 kg/hm2 took the second place;The grain output with planting density of 45×104/hm2 was tiptop,the second was that of 22.5×104/hm2.The decisive factor for grain output increasing was the total amount of spikelets of population.Under conditions of this experiment,proper amount of planting density and nitrogen applied was 45×104/hm2 and 330 kg/hm2.