摘要
采用3因素最优饱和设计,系统地研究了氮肥、磷肥与种植密度3因素对不同收获时期青贮玉米粗脂肪含量及产量的影响。结果表明:N、P与密度是影响粗脂肪含量与产量的重要因子。随着收获期推迟,密度与N对粗脂肪含量的作用逐渐增强,P的作用逐渐减弱。对粗脂肪产量的作用因不同收获期而异。总的来说,随N、P用量的增加,青贮玉米整株粗脂肪的含量及产量均呈单峰曲线变化,随密度的增大则略呈下降趋势。获得较高粗脂肪产量(170～390kg/hm2)的适宜施N量为165～225kg/hm2,施P量为65～140kg/hm2。
In this trial, effects of N fertilizer amount, P fertilizer amount and plant density to crude fat content and yield of different silage maize in different harvest periods were studied, applying 3 factors optimum saturation designing. It showed that N fertilizer amount, P fertilizer amount and plant density played important roles in crude fat content and yield of silage maize. The effects of N amount and density to crude fat content and yield increased, and the effect of P amount decreased with the postponing of growth stage. The effects of three factors are different because of different harvest periods. Crude fat content and yield of maize showed single-peaked curve with the increasing of N and P amounts, decreased with the increasing of density. The suitable N and P amount were 165 - 225 kg/ha and 65 - 140 kg/ha and the crude fat yield will reach 170 - 390 kg/ha.
出处
《玉米科学》
CAS
CSCD
北大核心
2007年第1期115-119,共5页
Journal of Maize Sciences
基金
呼和浩特市科技攻关计划项目(2003-1-农社-07)
关键词
青贮玉米
栽培措施
粗脂肪含量
粗脂肪产量
Silage maize
Cultivation measures
Crude fat content
Crude fat yield
