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当前京郊玉米品种现状及展望一、当前京郊玉米品种形势浅析。综合几次玉米品种观摩及专家的意见，对当前京郊玉米品种形势的基本估计是：当前京郊玉米品种正处在新旧交替时期，即第三次玉米单交种更换末期，第四次玉米单交种更换前期，第三次更换品种仍在适宜地区继续发挥...
The Current Status and Prospects of Beijing Suburb Maize Varieties I. Current Situation of Beijing Maize Varieties. Based on several observations of corn varieties and experts’ opinions, the basic estimation of the current situation of corn varieties in the suburbs of Beijing is: At present, the varieties of maize in the suburbs of Beijing are in the period of replacement of old and new, that is, the end of the third maize single exchange replacement, Single exchange replacement early, the third replacement of the species is still suitable for continued play in the region ...