农作物品“提纯”和“复壮”有无效果?怎样认识品种退化?这既是理论问题,又是生产上的实际问题,从农业生产实践看,提纯增产大,复壮无效果。现就个人管见,对自花授粉作物的品种复壮问题,提出一些初浅的看法。良种的混杂退化良种不是固定不变的,在一个地区种植的作物种子,总是随着外界条件的变化而不断地发生变异,遗传使种性保持不变,而适应则又不断地促使种性产生变异。因此任何一个所谓良种都要配以相应的良法,既要不 How to recognize the degradation of varieties? This is not only a theoretical problem, but also a practical problem in production. From the point of view of agricultural production practice, purification and yield increase and rejuvenation are ineffective. Now on personal management, self-pollinated varieties of seed rejuvenation problems, put forward some preliminary views. Variety of elite hybrid degenerative varieties is not fixed, crop seeds planted in one area, always with the changes in external conditions and continue to mutation, inheritance to maintain the same species, and adapt to continue to promote species Produce variation. Therefore, any one of the so-called seed should be accompanied by the corresponding good law, both not