杂交水稻种子纯度高低,直接关系到第二年大田杂交稻的产量。因此,认真抓好杂交稻种子质量,是当前种子生产过程中不可忽视的重要环节。我省多年实践证明:抓好宏观管理和微观控制是提高杂交水稻种子纯度,控制含杂率的有效措施。从宏观管理上应重点抓好: (一)坚持“省提、市(地)繁、县制”制种体系,为种子专业化、商品化、社会化生产创造条件。鼓励用种数量少,制种面积不大,或者质量提高有困难的地方,集中向制种条件好、质量有保证的地区定 The purity of hybrid rice seeds is directly related to the yield of hybrid rice in the second year. Therefore, earnestly grasp the quality of hybrid rice seeds is an important part of the current seed production process can not be ignored. Years of practice in our province have proved that: a good grasp of macroeconomic management and micro-control is to improve hybrid rice seed purity, effective control of impurity content. From the macro-management should focus on: (a) adhere to the "provincial mention, the city (to) the system of the county system of seed production system for the seeds of specialization, commercialization and create conditions for social production. Encourage the use of a small number of species, seed production area is not large, or improve the quality of the difficulties in places, to the conditions of good seed production, quality assurance of the region set