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近几年来,机械选种逐渐推广开来。“六五”期间,全国选种数量占大田用种量的7～8%,占种子公司供种量的30～50%,有些地区比例更高些。5年来,全国烘干、加工精选种子50亿公斤,节约、增产粮食达100亿公斤左右,创社会效益40～50亿元。据对我省20几个县的多次试验结果的分析,机械选种好处很大。 1.种子鉴定:中单2号玉米种,鉴定结果见表1。
In recent years, the mechanical selection gradually expanded. During the “65” period, the number of seed selection in the whole country accounted for 7 ~ 8% of the total amount of seeds used in the field, accounting for 30 ~ 50% of the seed supply for the seed companies, and the proportion in some areas was higher. In the past five years, the country has dried and processed 5 billion kilograms of selected seeds, saving about 10 billion kilograms of grain and increasing social benefits by 40 to 50 billion yuan. According to the analysis of several trial results of 20 counties in our province, the mechanical selection of seeds is of great benefit. 1. Seed identification: Zhongdan No. 2 corn species, the identification results in Table 1.