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针对我区玉米种植密度增加之后,株高明显增加,田间光照减弱,单株产量下降的情况,1980年以来研究了不同去雄方法以及去雄时不同带叶数量对产量的影响。研究证明,去雄后田间光照增强,籽粒灌浆速度明显加快。多年多点累计示范1.2万余亩,每亩增产玉米35～40公斤。1990年在各地迅速扩大推行,1991年推广面积15～20万亩。一、玉米雄穗的消极作用一是雄穗分杈多,高密度种植使群体内部光照减弱,净同化率降低;二是雄穗呼吸消耗大,从形成至散粉后一直保持较高的呼吸强度:三是雄穗具有弱强的顶端优势,优
Aiming at the increase of maize planting density in our district, the plant height was obviously increased, the field light was weakened and the yield per plant decreased. Since 1980, the effects of different methods of extinction and different numbers of leaves on the yield were studied. Studies have shown that field extinction increased illumination, grain filling rate significantly accelerated. Over the years, a total of more than 12,000 mu of demonstrative demonstration zones have been set up, 35-40 kilograms of corn per acre is increased. In 1990 the rapid expansion throughout the promotion of 1991 to promote an area of 15 to 20 acres. First, the negative role of maize tassel First tassel bifurcation and more high-density planting so that groups within the light weakened, the net assimilation rate decreased; Second, tassel consumption, from the formation of loose powder to maintain a high respiratory intensity : Three is tassel has the top advantage of weak, excellent