优良棉种对夺取棉花早熟、高产、优质,具有重要意义。当前我县主栽品种“朝棉1号”、“朝棉2号”混杂退化严重,株型变松变散,棉铃变尖变小,茎色变深,叶色变浅,叶片变薄,结铃部位增高,单铃重减低.第一果枝发生在第5～6节,比原来增高1～2节。铃型变异 Excellent varieties of cotton to seize cotton precocity, high yield, high quality, of great significance. At present, the main varieties of our county, “As the cotton 1”, “North Korea 2” mixed serious degradation, plant loose loose, cotton bolls become smaller and smaller, stem color darker, leaf color shallow, thinning leaves, The boll height increased and the boll weight decreased, the first fruiting branch occurred in the fifth to the sixth, an increase of 1 ~ 2 more than the original. Bell type variation