随着玉米生产的发展,对玉米杂交种需求量愈来愈大,单靠外地调入种子,已无法满足生产发展的需要.为此,我场在市种子公司的指导下,首次玉米杂交制种28.8亩,杂交一代种平均亩产122公斤,父本种子42公斤.由于首次制种,经验不足,产量高低悬殊,最高亩产201.35公斤,最低只有98公斤.现将1987年春制几点做法小结如下: With the development of corn production, the demand for maize hybrids is getting larger and larger, and the introduction of seeds alone can no longer meet the needs of production development. Therefore, under the guidance of the city seed company, Planted 28.8 acres, an average of 122 acres of hybrid per mu, 42 kg of male parent seed due to the first seed, lack of experience, the level of disparity in output, the highest yield 201.35 kg, the lowest is only 98 kg. The summary is as follows: