北辛武乡棉农经过多年的生 产实践,摸索出了几种简易的棉花 选留种技术,可供广大棉农参考。 1.选株混收留种法 在生长良好的棉田。选择具有原种特点(典型性),结铃多、铃大、吐絮好、纤维长、绒头厚的棉株,选收其正常吐絮棉铃混合后,留作下年的种子,可提高种子纯度,增加棉花单产、衣分,绒长也有所提高。 2.中喷花留种法 棉株中下部果枝第一、二节棉铃较其他果枝和果节的棉铃都大,且 North Xin Wuxiang cotton farmers after many years of production practice, worked out a few simple cotton species to stay species for cotton farmers reference. 1. Selection of strains mixed to stay in good growth in cotton fields. The cotton plants with the characteristics of the original species (typical), boll number, boll size, boll opening, long fiber length and pile thickness were selected and mixed for normal bolting and cotton boll selection, and then the seeds were reserved for the next year to improve the seed purity , Increase cotton yield, clothing points, velvet long also increased. 2. Spraying species in cotton plant in the lower branches of the first and second boll boll than other fruit and fruit bolls are large, and