种子是一种特殊的商品,是重要的农业生产资料,它具有生命性、不可代替性和生产减增成倍性。因此国家明确规定了杂交水稻种子质量必须达到:纯度96%以上(一级种要达98%以上),净度98%以上,发芽率(成苗率)80%以上,水份不高于13%;同时作为商品的自然属性要求外观色泽良好。要保证和提高杂交水稻种子质量,须把好生产、销售等每一个环节的质量关。 Seed is a special commodity, an important means of agricultural means of production. It is viable, irreplaceable and multiples of production. Therefore, the state clearly stipulates that the quality of hybrid rice seeds must reach above 96% purity (more than 98% for first grade, more than 98% purity), more than 80% germination rate (seedling formation rate) and no more than 13 %; At the same time as the natural properties of goods require good appearance color. To ensure and improve the quality of hybrid rice seeds, we must put a good production, sales and so on every aspect of the quality.