密肥条件对杂交中籼稻产量及其构成因素的影响

Effects of Amount of Nitrogen Applied and Density on Yield and Its Components of Middle-season Indica Hybrid Rice

以优质杂交中籼两优6326为材料,研究不同施氮量和密度对其产量及其构成因素的影响。结果表明:施氮量、密度对两优6326的产量有显著影响;225.0 kg/hm2施氮水平的产量最高,262.5 kg/hm2施氮水平的产量次之,以上两处理差异不显著,但比其他施氮处理极显著增产;密度以22.2万穴/hm2的产量最高,其次为33.3万穴/hm2,最低为16.7万穴/hm2。施氮量和密度对产量构成因素有不同的影响,其中对单位面积穗数影响最大,每穗总粒数次之,结实率相对较小,千粒重最为稳定。试验表明,两优6326适宜的施氮量为225.0kg/hm2,密度为22.2万穴/hm2。

The effects of nitrogen applied and density on yield and its components of middle-season Indica hybrid rice Liangyou 6 326 were studied.The result as.follows： The effects of amount of nitrogen applied and density on yield and its components of Liangyou6326 were obvious; The Grain output of amount of nitrogen applied was 225.0 kg/hm^2 was tiptop,262.5 kg/hm^2 took the second place;Compared to others nitrogen application ,they were increase yield significantly.The Grain output of painting density was 22.2 ×10^4 hills/hm^2 was tiptop,The second was 33.3 × 104 hills/hm^2 ,The lowest was 16.7 × 10^4 hills/hm^2 ; There was different function of yield components with different amount of nitrogen applied and density , the effect on panicles per unit area was most serious, total grains per panicle second, seed setting rate third, and 1000-grain weight least and the most stable too. Under conditions of this experiment,proper amount of nitrogen applied and density was 225.0 kg/hm^2 and 22.2 × 10^4hills/hm^2.