高产栽培下春玉米农艺性状及冠层结构研究

摘要

以金山27为试材,以普通农户栽培为对照,研究高产栽培下春玉米农艺性状及冠层结构.结果表明,高产春玉米产量极显著的高于普通农户栽培,有效穗数极显著高于普通农户栽培,穗粒数和千粒重均较普通农户低,千粒重未达显著水平.高产春玉米穗长、穗粗、穗行数、行粒数均小于普通农户,粒深和秃尖高于普通农户栽培.高产春玉米株高和穗位高都高于普通农户栽培,茎粗、双穗率和空杆率小于普通农户栽培,但均未达到显著水平.LAI全生育期都大于普通农户,在峰值时差异最大,且棒三叶以下叶片的LAI差异最大,尤以乳熟期明显.高产栽培春玉米LOV在吐丝期和乳熟期均大于普通农户,乳熟期棒三叶以上尤为明显.