【摘要】 以玉米三种垄作形式为主要内容 ,研究不同垄作的增产机制及相应的群体结构 ,提高玉米大面积连片种植的单产水平。试验表明 :大垄和大小垄种植方式具有保持和提高土壤温度、水分 ,抗旱抗涝的作用 ,同时适于密植 ,光能利用率高等特点 ,比常规小垄玉米增产 1 4%～ 2 2 .8%。适宜密度 6～ 7万株 /hm2 。更多还原

【Abstract】 In this study, We have mainly undertaken the experiment on three kinds of ridge cropping of corn to investigate the machanism of yield increasing of different ridge cropping and corresponding community structure in order to increase the unityield of corn in large acreage planting. The results indicated that both large ridge cropping and large small ridge cropping have the rolse of conserving and increasing temperature and water in soil, drought and waterlogging resistant. And They are suitable for close planting with high efficiency of energy conversion. The corn yield increased by 14~22.8% compared to the conventional small ridge cropping of corn. The density of rational close planting is 60~70 thousand plants/ha.更多还原