施氮水平对水稻生长与产量特性的影响

摘要

以松粳9号为试材，研究了不同施氮水平对水稻生长特性、产量以及产量构成因素的影响。结果表明：氮肥有利于水稻株高和分蘖的增加，但氮肥过多也会导致无效分蘖增加，增施氮肥在一定范围内能够提高作物产量，但会造成收获指数有所下降，氮肥能够促进每平方米穗数、穗实粒数以及千粒重等产量构成因素提高，同时建立了施氮量为依变量，穗数、实粒数、千粒重为自变量的多元线性回归方程。%　　Taking Songjing No .9 as material ,the effects of nitrogen fertilizer level on grow characteristics ,yield and yield components of rice were studied .The results indicated that nitrogen fertilizer was good for increasing of rice height and tiller ,but too much nitrogen fertilizer would lead to more invalid tillers .Using nitrogen fertil-izer could increase yield ,while harvest index would descend .Spike number ,full grainper spike and 1000-grain weight were raised by using nitrogen fertilizer ,polybasic linear regression equation taking nitrogen fertilizer a-mount as dependent variable ,spike number ,full grain and 1000-grain weight as independent variable was set up at the same time .