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80年思南县杂交包谷制种,由县统一部署、集中连片制种1813亩,平均亩产343斤,比79年增产53.4％,比78年每亩净增229斤,单产翻了两番多。许家坝等5个制种点,平均亩产在300斤以上,最高亩产510斤,其中400斤以上的有793亩。现综合各点杂交包谷制种亩产300斤以上的主要技术经验如下:一、建立杂交包谷制种繁育体制和基地思南县自1972年开始配制包谷杂交种。以往由于采取社队分散制种,致使杂交组合多、乱、杂、单产一直停留在100斤左右。1979年适当集中后,并认真选择高产组合,制
80 years of Sinan hybrid bread planting, unified deployment by the county, focused on contiguous seed production of 1813 mu, an average of 343 pounds per mu, an increase of 53.4% over 79 years, a net increase of 229 pounds per mu than 78 years, yield doubled Fanfan. Xujiaba and other five seed production points, the average yield of 300 pounds or more, the highest yield 510 pounds, of which more than 400 pounds have 793 acres. The main points are as follows: 1. Establishing a system of breeding and breeding of seed and seed production in Sinan County. In the past due to the decentralization of the communes and social teams, resulting in more hybrid combinations, chaos, miscellaneous, per unit of output has remained at about 100 pounds. After the proper concentration in 1979, and carefully selected high-yield combination system