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我们在六十年代上半期的玉米科研基础上,1975年5月用了几个京郊地区生产上应用的玉米品种,如白单四号、原单一号、群单105、京黄113,于5月22日播种,9月上旬收获,京黄113并进行了一期夏播(6月19日)。各品种在密度及管理上,都作了相应的安排,最后测产都在每亩600斤以上。这次观察,由于条件的限制,主要针对玉米叶片分组的区分界限上,重点观测了叶片的
On the basis of corn research in the first half of the 1960s, we used several maize varieties for production in the suburbs of Beijing in May 1975, such as Bai Dan IV, the original single number, the group of single 105, Jing Huang 113, at 5 Sowed on the 22nd and harvested in early September, the Jinghuang 113 was conducted for a summer sowing (June 19). All varieties in density and management, have made the appropriate arrangements, the final test yield of more than 600 pounds per mu. This observation, due to the limitations of the conditions, mainly for the division of corn leaf boundaries, the focus of the observation leaves