摘要
本文通过对豆类、胡麻、草木樨、箭舌碗豆等与玉米实行间套组合形式试验资料的统计分析表明,玉米子实产量(y)与春播间作物和玉米的共生天数(x)间呈极显著负相关(r=-0.9878 p<0.01),其直线回归方程式为:y=415.9-2.528x(p<0.01)。玉米单株粒童(y)与举株穗粒数(x)呈显著正相关(r=0.919 p<0.05),其直线回归方程式为:y=-3.609+0.219x(p<0.01)。对各处理混合子实产量、粗蛋白产量、产值、能量产出4项指数及其综合指数的比较表明,玉米、豆类实行间套作,较单作玉米有利于提高农业生态糸统的营养效益和综合效益,其中以玉米间作蚕豆为量优,其综合指数较单作玉米提高了47％,其次为玉米间作扁豆和玉米间作草木樨。
Date analyses indicated that seed production of corn(Y) and the length of period in which corn is intercropped with flax, sweetclover, vetch or beans (X) showed a significant negative correlation (r=-0.988, P<0.01). The linear regression equation is Y=415.9-2.528X. Seed weight of single corn plant (Y) and seed number of single tassel (X) showed a significant positive correlation (r=0.919, P<0.05), and the regression equation is Y=-3.609+0.219X(P<0.01). Based on seed production, crude protein production, output value and energy value, and the comprehensive index, intercropping of corn and beans is better in improving nutritive effect and overall effect of the agricultural ecosystem as compared with single cropping of corn. Intercropping of corn and broad bean is the best, with 47% increase in comprehensive index as compared with single cropping. This is followed by intercropping of corn and hyacinth bean and that of corn and Melilotus albus.
出处
《草业科学》
CAS
CSCD
北大核心
1990年第3期37-39,共3页
Pratacultural Science
