[Objective] The paper was to explore the effect of different sowing dates and densities on individual morphological development of super short-season insect-resistant cotton, confirm their effects on vegetative and reproductive growth of cotton, so as to provide theoretical and practical guidance for sowing date and density management of cotton planting in Jidong cotton growing region in Yellow River Basin. [Method] With super short-season insect-resistant cotton546as materials, the effects of different sow...