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1979年我场从张掖地区农科所引进玉米单交种488的亲本进行制种。为了保证制种质量、提高粮食亩产,根据这几年间作套种的经验,确定玉米488制种田进行三层楼种植法,制种面积96亩,平均亩收488单交种358斤、父本606斤、黄豆57斤、豌豆96斤,合计亩产1117斤,较大田种玉米,每亩增产约120斤。而且488单交种质量尚好,经室内考种,千粒重为321克,发芽率达98%以上,籽粒饱满。今年大田种植,出苗整齐,植株长势良好。
In 1979, my field planted seeds from 488 maize introduced from Zhangye Prefecture Agricultural Science Institute. In order to ensure the quality of seed production and increase grain yield per mu, according to the experience of intercropping in the past few years, we determined that the 488-year-old corn was planted in a three-storey plantation with a seed production area of 96 mu and an average harvest of 488 single seeds of 358 kg. 606 pounds, 57 pounds of soybeans, peas 96 pounds, a total of 1117 pounds per mu, more fields of corn, yield about 120 pounds per mu. And 488 single cross-breeding quality is still good, the indoor test species, one thousand grain weight of 321 grams, the germination rate of 98% or more, full grains. Field planting this year, emerge neatly, plants grow well.