一、花芽的分化 据南京师范学院(1979)的观察,当棉株第三真叶平展时,有2.8个果枝和3个花原基开始分化。棉株现蕾时,第8叶平展,只可见到一个果枝和一个蕾,但实际上还有9个果枝和26个花原基已开始分化(图13)。棉株现蕾前所分化的花原基,均有可能发育 First, flower bud differentiation According to the Nanjing Normal University (1979) observation, when the third true leaf of cotton plant is flattened, there are 2.8 fruiting branches and three primordia began to differentiate. When the cotton plants are budding, the 8th leaf is flat and only one fruit branch and one bud can be seen. However, in fact, 9 fruit branches and 26 flower primordia have begun to differentiate (Figure 13). Cotton plants before bud differentiation of the flower base, are likely to develop