1. Seed germination at seedling stage
Soybean seeds absorb nutrients and water in suitable soil, and the radicle protrudes from the micropyle of the ovule and begins to germinate. With the elongation of hypocotyl, cotyledons arch out of the ground with buds, and cotyledons appear in the form of seedlings.
2. Seedling growth period
After the cotyledons were unearthed and unfolded, the young stems continued to elongate. After 4-5 days, a pair of true leaves spread out, and after about 10 days, the true leaves spread out to the first compound leaf, and the axillary buds at the lower node of the main stem were mostly branched buds, gradually forming branches. This process is the seedling stage.
3. Flower bud differentiation stage
Soybean begins to differentiate from flower bud to flowering, which is called flower bud differentiation period, generally 25-30 days. From then on, the root system developed vigorously, the stems and leaves grew rapidly, and the flower buds differentiated one after another. Flowers bloom one after another.
4. Flowering and pod setting period
Soybean from germination to flowering. The flowering period is from flowering to flowering. Flowers lag behind young pods, and pods gradually become longer and wider. This process is the pod setting stage. Soybean flowering and pod setting are intertwined, which is called flowering and pod setting period.
5. Grain maturity
The beans in the yellow pods begin to swell until they reach the appropriate volume and weight, which is the so-called bulging stage. At the same time of pod skin development, seed coat has been formed, dry matter begins to accumulate, leaves turn yellow and fall off, and beans are dehydrated. When the seeds become round and completely hard, there will be a slight noise in the pods until the plants are shaken, which is the mature stage.
Recommended soybean selection methods:
1, look at the shape
By observing the shape of soybean, we can tell whether the purchased soybean is a non-GMO product to some extent. Generally speaking, non-GM soybeans, that is, naturally grown soybeans, are oval or flat kidney-shaped. Genetically modified soybeans look more "beautiful", usually round and look like reduced table tennis.
Step 2 look at the navel
Generally, the navel of high-quality soybeans is more obvious. The navel is usually brown, deep and shallow, and a white "open tooth" can be seen at the navel, while the navel of inferior soybeans and genetically modified soybeans is not obvious, and the color is similar to that of the beans themselves.
Step 3 look at the skin
When selecting, it is necessary to distinguish whether the epidermis of soybeans is damaged, whether there are insect eyes or not, and whether it is moldy. In general, the skin of high-quality soybeans is smooth and harmless. If you encounter a variety with serious skin damage, you should avoid picking it.