密度对全膜双垄沟播不同品种玉米干物质积累及分配的影响  

Effect of plant density on dry matter accumulation and transfer in different varieties of maize under full coverage on double ridges

作　　者：张永祥 杨祁峰[2] 牛俊义[3] 张雷[4] 牛芬菊 李德仁[4] 

机构地区：[1]甘肃省农业技术推广总站,甘肃兰州730020 [2]甘肃省农牧厅,甘肃兰州730030 [3]甘肃农业大学,甘肃兰州730070 [4]榆中县农业技术推广中心,甘肃榆中730010

出　　处：《干旱地区农业研究》2010年第5期26-31,共6页Agricultural Research in the Arid Areas

基　　金：甘肃省地膜高效利用技术研究与示范(甘农财2007-13)

摘　　要：在全膜双垄沟播条件下,研究了不同密度处理2种不同品种玉米富农1号和武科2号干物质积累与分配规律。结果表明:玉米单株干物质积累和群体干物质积累均呈Logistic生长曲线;各生育时期单株干物质积累量随密度增加而减小,群体干物质积累随密度的增加而增加;密度对单株干物质积累的影响主要体现在大喇叭口期以后;密度对干物质分配的影响主要体现在灌浆期以后;茎、叶干物质转移率对密度的反应不敏感,而转换率随密度的增加而上升。Effect of plant density on accumulation and distribution of dry matter in two maize varieties Funong 1 and Wuke 2 under full coverage on double ridges was studied.The results showed that dynamics of dry matter accumulation of single plant and population were Logistic curves.In each stage,the accumulation of dry matter of single plant decreased but that of population increased when plant density increasing.The effects of plant density on dry matter accumulation and distribution were more and more significant after huge bell bottom stage and filling stage.Effects of plant density on dry matter movement ratio was not sensitive to stem and leaf,but the transformation ratio was increased when plant density increasing.

关 键 词：玉米 密度 干物质积累 干物质分配 干物质转移 

分 类 号：S342.1[农业科学—作物栽培与耕作技术]