1960—1961年我校结合教学,对小麦、高粱、谷子、水稻等进行了穗分化观察,结果如下:(一)小麦:适时(十月六日)播种的小麦比晚播(十月二十二日)的小麦,生长锥开始伸长早一周左右,从分化开始到护颖分化,历时较长,小穗多,每一小穗花少。而晚播小麦,小穗虽少,但 From 1960 to 1961, we observed the ear differentiation of wheat, sorghum, millet and rice by teaching in our school. The results were as follows: (i) Wheat: the wheat sown in time (October 6) Two days) of wheat, the growth cone began to elongate about a week earlier, from the beginning of differentiation to protect the Ying differentiation, lasted longer, spikelets and more, each spike to spend less. The late sowing wheat, spikelets, although less