耐密玉米增产因素浅析赵铁生，卜树民，孙晶，郑是标（白城农科所）我省近年耐密型玉米品种种植面积不断扩大，各育种单位对耐密型杂交种的研究亦不断深入，为明了耐密型杂交种的增产机理，更好地发挥其增产潜力，本文对近年科研单位新育成的杂交种进行了外观性状增产因素... Analysis on factors that increase the yield of tolerant maize ZHAO Tie-sheng, BU Shu-min, SUN Jing, ZHENG Shi-biao (Baicheng Agricultural Science Institute) In recent years, the planting area of ​​confined maize varieties in our province has been continuously expanding. , In order to clarify the yield-increasing mechanism of close-tolerance hybrids and to better exert their potentials for increasing production, this paper carried out the factors that increase the yield of hybrids newly cultivated by scientific research units in recent years.