麦穗是由多个小穗组成的,每个小穗含有2～9个小花,一个发育正常的小花,受精后可结一个麦粒。要想使小麦高产,就必须争取增加小穗和小花数,争取穗大粒多。其关键在于促进幼穗的分化。我区栽培的是春小麦,幼穗分化是从三叶期开始到挑旗孕穗结束。三叶前,即二叶时,如将叶子全部剥去,在显微镜下可看到顶端透亮,呈半圆形的生长锥。生长锥是一团具有分裂 The ears consist of spikelets, each spikelet containing 2 to 9 florets, a well-developed flower, and one grain of wheat after fertilization. In order to make wheat high yield, we must strive to increase the number of spikelets and florets for large spikelets and more. The key is to promote the differentiation of young ears. My area is cultivated in spring wheat, panicle differentiation is from the beginning of the three-leaf stage to the end of the flag booting. Clover, that is, two leaves, such as the leaves all stripped, the top of the microscope can be seen translucent, was a semicircular growth cone. Growing cone is a group with split