一、前言棉花的现蕾开花结铃都是按照一定规律进行的,在同一株棉花上有效铃的形成时期,有一个半月到两个月的时间。在当地的自然条件下,陆地棉中熟品种,一般从6月下旬开始开花,直到8月下旬所开的花,仍可发育成熟为有效铃,棉花不同部位铃形成期的差異,决定了一些主要经济性状存在的異質性,这是由于环境条件直接影响和棉株营养物質分配造成的。 First, the preface cotton budding flowering bell are carried out in accordance with certain laws, the same strain of cotton on the formation of effective bell, there is a half months to two months time. Under the local natural conditions, medium-mature varieties of Upland cotton generally bloom from the late June to the present, and the flower opened in late August can still mature into an effective bell, and the difference in the bell-forming period of different parts of cotton determines a few The heterogeneity of the main economic traits is due to the direct effects of environmental conditions and the distribution of nutrients in cotton plants.