Detailed Explanation of the Latest Management Key Points for Soybeans at the Flowering and Podding Stage
Management of soybeans during the flowering and podding stage is related to the final yield of soybean cultivation and is closely tied to farmers' income. Once managed improperly, it can lead to reduced yield in mild cases or total crop failure in severe cases. So how should soybeans be managed during the flowering and podding stage? Let's take a look at the detailed introduction below.
1. Fertilization
The flowering and podding stage is the peak period of fertilizer demand for soybeans, so the key focus at this stage is fertilization, especially fertilization at the flowering stage, which has a clear yield-increasing effect. Generally, at the early flowering stage, apply 500 kg of thin human and animal manure per mu, mix in 3-5 kg of urea, and apply it together in holes. For fields with fertile soil and vigorously growing plants, less or no application may be used to avoid excessive vegetative growth and lodging. During the podding stage, topdressing nitrogen fertilizer, foliar spraying of phosphorus and potassium fertilizers, and trace fertilizers such as boron and molybdenum have an excellent yield-increasing effect. Generally spray twice, each time using 100 grams of monopotassium phosphate, 25 grams of ammonium molybdate, and 100 grams of borax per mu, adding 50 kg of water, and evenly sprinkling it on the stems and leaves.
2. Irrigation and Drought Resistance
Soybeans have a very high water requirement during the flowering and podding stage and are relatively sensitive to moisture. Generally, when there is drought and insufficient water, a large number of flowers and pods will drop. Therefore, timely irrigation should be carried out during dry weather or when leaves wilt. However, attention should also be paid to the method of irrigation. Flood irrigation is not suitable because it can easily cause root asphyxiation and death. After water infiltrates, it can also cause soil compaction and cracking, thereby damaging the root system and leading to lodging and death of the plants. It is recommended to use small furrow irrigation, digging furrows between rows and letting water flow into the furrows. When the soil is moist, excess water can be drained away to avoid affecting root growth.
3. Drainage to Reduce Waterlogging
Soybeans themselves have poor waterlogging tolerance. During the flowering and podding stage, if there is excessive rain, it will cause the plant leaves to turn yellow and a large number of flowers and pods to fall off, and water accumulation in the soil will also lead to root hypoxia or asphyxiation. Therefore, when rain occurs during the flowering and podding stage, drainage must be carried out in time to reduce waterlogging, so as to avoid poor plant growth and thus affect the later yield.
4. Growth Control
During the flowering and podding stage of soybeans, under conditions of sufficient fertilizer and water, the stems and leaves of the plants are very prone to excessive and vigorous growth, competing with the pods for nutrients, causing poor development of the beans and the appearance of shriveled grains, seriously affecting yield and income. Therefore, growth control measures should be taken 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, and evenly spray it on both sides of the leaves. The growth control effect is obvious and can greatly inhibit plant growth, concentrate nutrients in the pods, and have a clear yield-increasing effect.
The above is an introduction to the management key points for soybeans during the flowering and podding stage. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.