氮、磷、钾用量及配比对两系杂交稻两优108灌浆期剑叶光合特性的影响  

Effects of Combined Application of N,P and K on Photosynthesis of Flag Leave During Grain Filling Period for a Hybrid Rice,Liangyou 108

作　　者：夏士健[1] 郑克武[2] 吕川根[1] 

机构地区：[1]江苏省农业科学院粮食作物研究所,江苏南京210014 [2]江苏省农业科学院资源与环境研究所,江苏南京210014

出　　处：《江苏农业学报》2008年第4期431-435,共5页Jiangsu Journal of Agricultural Sciences

基　　金：国家“863”计划项目(2003AA212040)

摘　　要：以两系杂交稻两优108为材料，在大田生产条件下，研究了不同氮、磷、钾用量及配比对灌浆期剑叶光合特性的影响，建立了三元二次肥料效应的数学模型。结果表明：两优108灌浆期剑叶光合速率与氮、磷和钾用量呈曲线或直线相关，一定范围内施用氮、磷、钾肥能显著提高光合速率，效应大小为磷〉氮〉钾；磷的影响最显著，磷、钾肥对光合速率具有正效的互作效应；在中等肥力土壤条件下，N、P2O5和K2O的施用量分别为190．2～240．6kg／hm^2、50．8～83．6kg／hm^2和238．2～363．0kg／hm^2时，两优108剑叶光合速率能达到20．5μmol／（m^2·s）。By the method of quadratic, orthogonal rotational combination design with three factors, studies were conducted on the effects of different application levels of N, P and K fertilizers on photosynthetic characteristics of flag leaves for a hybrid rice, Liangyou 108. A regressive equation was established between photosynthetic rate and the application level of fertilizer. The result indicated that nitrogen, potassium and phosphorus fertilizers could significantly enhance photosynthetic rate of flag leaves. The effects order were phosphorus 〉 nitrogen 〉 potassium. P fertilizer had the most significant effect on the photosynthetic rate among N, P, K and there was obvious interaction between P and K. In the moderately fertilized rice field, the optimum fertilization formulation was： N 190. 2 -240. 6 kg/hm^2, P205 50. 8 -83.6 kg/hm^2, 23.8 - 363.0 kg/hm^2 K2O, and the photosynthetic rate could reach the value of 20. 5μmol/（ m^2 · s）.

关 键 词：亚种间杂交稻 氮 磷 钾配比 光合特性 

分 类 号：S511.01[农业科学—作物学]