杂交水稻的四项质量指标(水分、发芽率、净度和纯度)中,以纯度为最重要的质量指标。本文试从种子的生产、经营的主要过程,浅议杂交水稻种子的纯度控制技术。1 播种之前的纯度控制在杂交水稻制种生产开始之前,就存在纯度问题,主要表现在以下方面:1.1 母本的纯度这是杂交一代种子纯度的保证。在实际生产中,母本的纯度不过关,杂交一代种子的纯度就很难达到标准。尽管以后进行了很多的质量控制,往往都是无济于事。有的公司自己生产母本,往往忽视对于纯度的控制,导致一代种子质量不达标;有的公司购买母本,贪图便宜,购买质量不太好的母本,结果导致以 Four quality indicators (moisture content, germination rate, clarity and purity) of hybrid rice are the most important quality indicators. This paper tries to discuss the main process of seed production and management, and discusses the purity control of hybrid rice seeds. Purity control before sowing Before the start of hybrid rice seed production, there are purity problems, mainly in the following aspects: 1.1 purity of maternal purity This is the purity of hybrid seed generation to ensure that. In actual production, the purity of the maternal parent, but the purity of the hybrid seed is difficult to achieve the standard. Although a lot of quality control in the future, often helpless. Some companies produce their own motherland, often ignore the control of purity, resulting in a generation of substandard seed quality; some companies to buy the motherland, covet cheap, buy quality mother is not very good, resulting in