在棉花良种供给不足的条件下,棉农可采用,株选混收法留种,此法可分为选优株混收和去杂去劣后混收两种形式。前者适合在混杂退化的棉田,选择具有原品种特性、结铃多、铃大、吐絮好的优良棉株进行标记,混收其正常吐絮的大朵中喷花留种;后者适合在生长良好、纯度较高的棉田,对杂异株、小铃退化株进行标记淘 Under the conditions of insufficient supply of cotton varieties, cotton farmers can adopt, the strain selection and collection method to stay species, this method can be divided into two types of selection and superior strains mixed and mixed to the poor after the poor. The former is suitable for selection in the degenerated mixed cotton fields, the selection of the characteristics of the original breed, boll bell, boll, boll good fine cotton plants were marked, mixed with its normal boll flowering in the big flower spray; the latter suitable for good growth , High purity cotton fields, the hybrid strains, small bell degenerated strains were scoured Amoy