在毛主席革命路线指引下,近年来我市玉米、高梁杂交种正在迅速普及推广,有些先进社、队已基本上普及了“两杂”,但是有的地方,由于在扩繁和制种时隔离条件不够,开花串粉造成生物学混杂;其次,就是收获、脱粒、贮藏不慎,造成机械混杂;致使种性不纯,退化严重,大大影响了杂交种的增产效 Under the guidance of Chairman Mao’s revolutionary line, the maize and sorghum hybrids in our city are rapidly popularizing and popularizing in recent years. Some advanced clubs have basically popularized the “two hybrids”. However, in some places, due to the expansion and seed production Isolation conditions are not enough, flowering powder resulting in a mixture of biology; Second, is the harvest, threshing, storage inadvertently, resulting in mechanical mixing; resulting in impure, serious degradation, greatly affected the hybrid yield increase