玉米杂交制种除严格执行杂交制种技术操作规程外，在安排制种田时还必须考虑到其它一些因素，否则也可能导致制种失败，这就是本文提出的“五忌”。１忌父母本正反交在较近区域内。父母本正反交的种子田在较近的情况下，容易造成制种户将父本相互串换，将父本掺入种子。虽... In addition to the strict implementation of hybrid seed production techniques and operating procedures, corn hybridization must take into account other factors when arranging farming, otherwise it may lead to failure of seed production. This is the “five avoidance” proposed in this paper. Avoid parents positive and negative cross in the closer area. In the case of close relatives, it is easy for seed-raising households to swap their parents for each other and to incorporate the male parent into the seed. although...