【摘要】 从理论与实践角度阐述了玉米密植生产是生产力发展到较高水平、光能利用率上升为玉米生产的主要限制因素的必然结果,是机械化发展的要求。选育和应用密植型品种,依靠合理密植是玉米生产获得成功的关键。在实践中要结合生态条件因地制宜地进行密植生产。提出在耐密植品种选育中,要利用耐密性较好的种质资源组配基础材料,在9万~12万株·hm-2种植密度下进行早代加密选择。更多还原

【Abstract】 Opinions set forth that high-planting-density in maize production was the results of progress of productivity when utility rate of luminous energy became the main factors limiting maize production,and also was the requirement of mechanization from theoretical and practical angle.Breeding and application of density tolerent maize cultivars,relying on reasonable density were the key to the success of maize production.In the procedure of maize production high-planting-density should be used properly according to the ecological conditions.Take advantage of good germplasm resources with high density tolerance to comprise base material,select in early generation at 90 000 ~120 000plants·hm-2 density were suggested.更多还原