良种是增产的内因,是其它措施不可代替的增产因素。因此,农业生产上选用高产优质对路的良种,并重视种子质量,特别是纯度才能确保粮食增产和优质。据科学实验和生产实践证明,种子的纯度对作物产量的影响极大。可以说纯度是良种最重要的质量指标,也是实现种子质量标准化,评定种子等级的重要依据。 A good seed is the internal factor that increases yield, which is an irreplaceable increase factor of other measures. Therefore, the selection of high quality and good quality agricultural products on the road, and pay attention to the quality of seeds, especially the purity in order to ensure grain yield and quality. According to scientific experiments and production practices, the purity of the seeds has a great impact on crop yields. Can be said that purity is the most important quality indicators of seed, but also to achieve the standardization of seed quality, an important basis for the assessment of the seed level.