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一、植株外部形态及生育特点1.玉米抽出雄穗后3～6天开始散粉,沈阳地区晴天一般以上午9～11时开花散粉最多,每一雄穗可产生花粉粒1,500～3,000万个。雌穗吐丝一般比雄穗开花晚2～5天。此时.植株叶片仍为绿色。2.授粉后8～10天,受精卵细胞分裂形成原胚。并开始分化。受精后25～35天胚发育形成的籽粒达到正常大小.植株茎叶中的营养物质不断向籽粒内输送。3.乳熟时,植株下
First, the external morphology of plants and fertility characteristics 1 maize tassel from 3 to 6 days after the start loose powder, Shenyang sunny days usually 9 am to 11 am flowering loose powder up to each tassel can produce pollen grains 1,500 to 30 million. Spike silky tassel generally tassel 2 to 5 days late. At this point, plant leaves are still green. After pollination 8 to 10 days, fertilized egg cell division to form the original embryo. And began to divide. After fertilization 25 to 35 days embryo development and formation of the grain to the normal size of plant stems and leaves of nutrients continue to feed grain. 3. Milky, under the plant