将疏枝直立大果型花生品种“徐州68—4”的种子,经用8、7、6 mm条孔筛选,分出一、二、三级种子,然后种植在同等条件下,进行田间生育动态观察和产比试验。结果表明:一、二级种子的出苗率在82%以上,三级种子为74.2%。苗期长势一、二级种子明显优于三级种子,同时早见花4—5天,始花期至盛花期,一级种子的花量比二级的多8.9%,比三级种子多28.7%;二级种子比三级的多18.2%。成熟收获时,一级种子产量比二级种子增产2.5%,比三 Seeds of “Shuangzhou 68-4”, a large-sized peanut variety of Shuizi, were screened by 8, 7 and 6 mm strips to separate first, second and third seeds, and then planted under the same conditions for field fertility Dynamic observation and production ratio test. The results showed that the seed germination rate of the first and second seeds was over 82% and the third seed was 74.2%. Seedlings of the first and second seeds were significantly better than the third seeds, at the same time 4-5 days early flowering, flowering to full flowering stage, the amount of first-class seeds 8.9% more than the second-level, more than the third-level seed 28.7 %; Second-grade seeds are 18.2% more than third-grade ones. At harvest, the first seed yield increased 2.5% over the second seed, more than three