How Many Months After Sprouting Do Soybean Flowers Bloom, plus Cultivation Techniques and Key Management Points During the Flowering and Podding Stage

Management during the flowering and podding stage of soybeans is tied to the final yield of the soybean crop and is closely linked to farmers' income; if managed improperly, it can mean a yield reduction in mild cases or a total crop failure in severe ones. So how should soybeans be managed during the flowering and podding stage? Let's take a look at the detailed introduction below. Flowering occurs about 50-60 days after sowing. Generally planted in April-May, the flowering period falls around September.

1. Fertilization

The flowering and podding stage is the peak period of fertilizer demand for soybeans, so the focus at this stage is fertilization, especially fertilization at the flowering stage, which has an obvious yield-increasing effect. Generally, in the early flowering stage, apply 500 kg of diluted human manure and urine per mu, mixed with 3-5 kg of urea for hole application; for fields with fertile soil and vigorously growing plants, apply less or not at all, to avoid excessive vegetative growth and lodging. During the podding stage, supplemental nitrogen fertilizer combined with foliar spraying of phosphorus and potassium fertilizers as well as boron, molybdenum and other trace fertilizers has an excellent yield-increasing effect. Generally spray twice; each time use 100 g of monopotassium phosphate, 25 g of ammonium molybdate and 100 g of borax per mu, add 50 kg of water, and spray evenly on the stems and leaves.

2. Irrigation and Drought Resistance

Soybeans need a great deal of water during the flowering and podding stage and are quite sensitive to moisture; generally, when there is drought and a lack of water, a large number of flowers and pods will drop. So when the climate is dry or the leaves wilt, irrigate promptly. However, pay attention to the irrigation method; flood irrigation is not suitable, as it can easily cause root asphyxiation and death, and after the water infiltrates it can also cause soil compaction and cracking, thereby damaging the root system and causing plants to lodge and die. Furrow irrigation with a small amount of water is recommended: dig furrows between the rows, let water flow into the furrows, and when the soil is moist, drain off the excess water so as not to affect root growth.

3. Drainage to Reduce Waterlogging

Soybeans themselves have poor waterlogging tolerance. During the flowering and podding stage, if there is too much rain, it will cause the leaves to turn yellow and a large number of flowers and pods to drop, and water accumulation in the soil will also lead to root oxygen deficiency or asphyxiation. Therefore, when rain occurs during the flowering and podding stage, drainage to reduce waterlogging must be carried out promptly, so as to avoid poor plant growth and the resulting impact on later yield.

4. Growth Control

During the flowering and podding stage of soybeans, when fertilizer and water are sufficient, the stems and leaves of the plants very easily grow excessively and vigorously, competing with the pods for nutrients, which leads to poor seed development, the appearance of shriveled seeds, and a serious impact on yield and returns. Therefore, growth control measures must be well carried out during the flowering and podding stage. In production, chemical growth control is commonly used: generally around the flowering stage, spray a very low concentration of paclobutrazol, applying it evenly to both sides of the leaves; the growth control effect is obvious, and it can greatly inhibit plant growth, concentrate nutrients in the pods, and produce an obvious yield increase.

The above is an introduction to the key management points for soybeans during the flowering and podding stage. We hope it helps you. To learn more related knowledge, please stay tuned to us.