论文部分内容阅读
一、大豆营养器官的建成大豆种子发芽时,胚根首先突破珠孔下扎,随着下胚轴的伸长,两片子叶带着胚芽逐渐从土中升出地表.在发芽过程中,子叶中贮藏的碳水化合物及脂肪大约在发芽后15天即消耗完.以后,幼苗即靠根系吸收水分和养分生活.子叶展开后约4～5天,一对单叶展平,再经过10天左右第一片复叶展开.主茎在长出第五片复叶之前,每隔5～6天出现1叶,以后大约每隔3天即可出现1叶,主茎节
First, the establishment of soybean vegetative organs Soybean seeds germinate, the radicle first pierced the beads under the bar, with the hypocotyl elongation, two pieces of leaves with a germ gradually rose from the surface of the earth in the process of germination, cotyledons In the storage of carbohydrates and fat about 15 days after germination is consumed, after the seedlings that rely on the roots to absorb moisture and nutrients living cotyledon after about 4 to 5 days, a pair of flattened leaves, and then after about 10 days first Leaf compound leaf expansion.The main stem in the growth of the fifth compound leaf, every 5 to 6 days after the emergence of a leaf, after about every 3 days to 1 leaf, the main stem