There are four points in the soybean seed germination process. The first point: the mature seed in the soil began to germinate; the second point: the embryonic root of the seed breaks through the seed coat, grows downward, and becomes the root system; the third point: the cells of the embryonic axis grow and elongate accordingly, and extend the embryonic shoot out of the soil to form the branch and the leaf blade; the fourth point: the leaf blade leaves the soil together with the embryonic shoot, and after opening up, it becomes green, and carries out photosynthesis.

1, seedling emergence: ?

The embryonic root of soybean seeds first extends from the ovule bead hole, and when the embryonic root elongates to equal the length of the seed it is called germination. Embryonic axis elongation, seed coat off, cotyledons with hypocotyl elongation exposed soil surface, when the cotyledon unfolded called seedling. Conditions are suitable, 4 to 6 days after sowing can be seedling. More than half of the cotyledons in the field emerge from the soil as seedling emergence.

2, seedling stage: ?

The soybean from seedling to flower bud differentiation before the seedling period, after the seedling 2 cotyledons unfold, its young stem continues to elongate, above the 2 opposite single leaves then unfold, this time called single leaf period. As the young stem continues to elongate, the first compound leaf is called the 3-leaf stage. 3-leaf stage above ground part of the growth rate is slower, the underground root system grows faster to form rhizomes. At the end of this period, the root system is initially formed and begins to require more water and nutrients. Seedling period about 20 ~ 25 days, accounting for 1/5 of the entire reproductive period. this period is the long root period, should pay attention to squatting, strengthen field management, to achieve the seedling full, seedling uniform, seedling strong, for the foundation of abundant production.

3, bud differentiation period: ?

The soybean buds from the beginning of differentiation to the beginning of flower bud differentiation period, generally about 25 to 30 days. When the compound leaves appeared 4 to 5, the lower part of the main stem began to branch, while the differentiation of flower buds. Flower buds began to differentiate the process is the first hemispherical bud primordium, then in front of it to form a ministry piece, and then the formation of the tube, and then differentiated keel petals, wing petals and flag petals, annular stamen primordium successively differentiated in the center of the stamen gynoecium began to differentiate and ovule primordium, and then into the ovule, anther primordium differentiation, the gradual growth of the floral organs, and finally the formation of flower buds, pollen and the embryo sac, complete the Flower bud differentiation. Flower bud differentiation plant into the reproductive growth and nutrient growth and into the period, it is necessary to strengthen the fertilizer management, and pay attention to the coordination of nutrient growth and reproductive growth, to achieve the requirements of plant strength, branching, flower buds, flowers, healthy.