钾素对小麦生长发育及籽粒产量的影响  

Effect of Potassium on Growth and Grain Production of Winter Wheat

作　　者：付国占[1] 李友军[1] 李春霞[1] 史国安[1] 刘素云[1] 

机构地区：[1]洛阳农业高等专科学校农学系,河南洛阳471003

出　　处：《沈阳农业大学学报》1999年第6期617-620,共4页Journal of Shenyang Agricultural University

基　　金：河南省科委和洛阳市科委重点科技攻关项目

摘　　要：1993－1995年采取田间试验和池栽试验相结合的方法，对钾素的增产效应进行了研究，结果表明：高产条件下增施钾肥，能够增加小麦植株基部1，2节间粗度和壁厚，提高植株抗倒能力力；能够提高叶面积系数，增加旗叶Chl含量，减少O^-2产生，降低MDA含量，延缓叶片衰老促进干特积量与运转，增粒增重，从而显著增加小麦产量，但施钾量超过150kg.hm^-2以后其效果有所下降。The effect of potassium on increasing yield of winter wheat was studied by combination experiments of field culture and pond culture from 1993 through 1995. The result are as follows: In high yield condition, increasing the supplying amount of potassium could increase the thickness and wall thickness of basic l, 2 internode, strong ability of resistance to lodging, increase leaf area index and the amount of flag leaf chlorophyll, decrease the production of active oxygen and accumulation of malondia dehyde, retard the leaf growing old, stimulate dry matter accumulation and transportation to grain, increase the grain number per ear and 1000-grain weight, thus increase the yield significantly. But the effect begin to decrease gradually when the amount is over 150kg.hm-_2

关 键 词：钾素 小麦 生长发育 籽粒产量 增产机理 施用量 肥效 

分 类 号：S512.1[农业科学—作物学] S143.3