一试验目的自从农业合作化以后,随着农业技术的不断提高,肥料的增施,回槎玉米面积的扩大,原有的品种已不能满足生产上的要求,如何供应丰产、耐肥、抗逆力强的杂交种,成为生产上迫切需要解决的问题。近来很多农业社都建立了玉米留种地,广泛的进行去雄授粉,这给推广品种间杂交技术创造了有利条件。 The purpose of a test Since the cooperation of agriculture, with the continuous improvement of agricultural technology, fertilizers, the expansion of corn 回 back, the original varieties have been unable to meet the production requirements, how to supply high yield, resistance to fat, resistance Strong hybrids have become urgent problems to be solved in production. Recently, many agricultural cooperatives have set up corn breeding sites and extensively conducted male pollination, which has created favorable conditions for the promotion of hybridization among varieties.