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引言一九八二年以来,河北省承德地区共为北京市及三个省区和本省四个地区代制了“京杂六号”玉米单交种4,300亩,平均亩产达到523斤.滦平县西院基地330亩制种田,平均亩产629.5斤;东院基地农户文广成0.9亩制种田,平均亩产816斤;砂薄地占总面积23.8%的承德县苇子峪基地132亩制种田,平均亩产631斤.本文根据京郊配制“京杂六号”玉米种产量较低的情况,结合承德近年来对该品种配制的一些经验及一级种子率占96%以上的实践,略述浅见,以供商榷:
Introduction Since 1982, a total of 4,300 mu of “Beijing Hybrid No.6” maize cross has been made in Beijing and three provinces and four provinces in the province by Chengde in Hebei Province, with an average yield of 523 kg per mu . Luanping County West base of 330 acres of farming system, the average yield of 629.5 kg; East courtyard base farmers into a 0.9 acres of farming system, an average of 816 kg per mu; sandy area accounts for 23.8% of the total area of 132 acres of Chengde County Wei Zuyu base The average yield per mu is 631 kg.In this paper, based on the low yield of “Beijing No. 6” hybrid corn in the suburbs of Beijing, combined with some experiences and the first seed rate of more than 96% in Chengde in recent years, The practice, a brief account of humble opinion, for discussion: