论文部分内容阅读
选用优良品种①根据热量资源选种。生长期长的玉米品种丰产性能好,增产潜力高。热量足,应尽量选择生长期长的玉米品种。②根据当地生产条件选种。生产水平高,土壤肥沃,水源充足的地区,可选择增产潜力大的玉米品种。③根
Selection of excellent varieties ① heat resources according to selection. Growing corn varieties of high yield performance, high yield potential. Enough calories, should try to choose long-growing corn varieties. ② according to the local conditions of production selection. High levels of production, fertile soil, adequate water areas, the choice of large potential yield corn varieties. ③ root