一个花生品种经过长期栽培,由于机械混杂,生物学混杂,品种本身遗传性发生变化和自然变异等,常常导致花生品种混杂退化。随着良种利用年限的延长,品种混杂退化的程度就愈加严重。良种混杂退化后,生长不整齐,成熟不一致,荚果变小,严重影响产量和品质。因此,良种即使在推广过程中,也必须坚持经常性地提纯复壮。生产实践证明,经过提纯复壮的花生 After a long-term cultivation of peanut varieties, due to mechanical confounding, mixed biology, hereditary occurrence of varieties themselves and natural variation, etc., peanut varieties are often mixed and degenerated. With the prolongation of the useful life of the elite, the degree of hybrid degeneration will become even more serious. After the thoroughbred hybrid degeneration, the growth is irregular, the maturation is inconsistent, the pod becomes smaller, seriously affecting the yield and quality. Therefore, even in the popularization process, we must also insist on regular purification and rejuvenation. Production practice has proved that after purification and rejuvenation of peanuts