种子精选是种子加工的重要组成部份,也是实现种子“四化”、提高种子质量、促进农业增产和提高经济效益的重要手段。据此,我站从1979年起,选用和推广了上海市向明农机厂(现名上海机械轴承厂)生产的5XZ-1.0型重力式种子精选机,到83年底止,全局所属市郊十五个国营农场(不包括外省的市属国营农场,下同)已配备19台,累计精选稻、麦、玉米、大豆等主要粮食作物种子4657.91万斤。现将汇总情况报告如下: 一、提高种用品质 1.纯、净、健、壮是优质种子的四大标志,千粒重的提高,增加了种子“壮”的程度。据我们对1980～83年间市郊各场测定数据的汇总,平均千粒重的提高情况见表1。 Seed selection is an important part of seed processing, but also to achieve the “four modernizations”, improve seed quality, promote agricultural production and improve economic efficiency of the important means. Accordingly, I station since 1979, the selection and promotion of Shanghai to the Ming Machinery Factory (now Shanghai Mechanical Bearing Factory) production of 5XZ-1.0 gravity seed sorting machine until the end of 83, the global subordinate ten Five state-owned farms (excluding municipal state-owned farms in other provinces, the same below) have been equipped with 19 sets of 46.5791 million catties of key grain crops such as rice, wheat, corn and soya. Now the summary of the situation is reported as follows: First, to improve the quality of seed used 1. Pure, net, health and strong is the four signs of high-quality seeds, increased grain weight, increased seed “Zhuang” level. According to our summary of the measured data of the suburbs from 1980 to 1983, the average increase of 1000-grain weight is shown in Table 1.