Causes of flower and pod shedding in soybean
1. Poor ventilation and light transmittance sunlight is not only the main energy for the production and accumulation of organic nutrition, but also the main factor for promoting plant rapid development and inhibiting overgrowth. Soybean has good ventilation and light transmission, which can make the climate between plants consistent with that of the upper part of plants, reduce the humidity between plants, increase light and temperature, accelerate leaf area transpiration and accelerate the speed of nutrient transport.
2. The loss of flowers and pods in barren soil is more than that in fertile soil. The soybean with overgrown and shaded branches and leaves grew more normally than the plant, and the flowers and pods of ventilated and transparent soybean fell off more easily than those formed earlier.
3. Unreasonable water supply
In the flowering and podding stage of soybean, the high humidity, overcast and rainy soil moisture not only reduced the sunshine hours, but also decreased the ground temperature, increased the relative humidity, increased the plant growth, increased the shade degree, weakened the photosynthesis, affected the synthesis and transport of organic nutrients, and increased the shedding of flowers and pods.
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Soybean chemical control technology
Using chemical technology to control cultivation is a new technology in agricultural production. The chemical control cultivation of soybean can regulate the growth and development of the plant, increase the flower, protect the pod and increase the yield. The application of rare earth elements, also known as rare earth micro-fertilizer or rare earth nitrate, is a new type of rare earth element fertilizer pioneered and popularized in China. In the seedling stage and the first flowering stage of soybean, spraying the rare earth solution with a concentration of 0.03%, 0.04% and 0.08%, respectively, can increase the grain protein content by 5.
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Management measures for flowering and pod stage of soybean
The main results are as follows: 1. The practice of topdressing flower and pod fertilizer shows that topdressing at flowering and pod setting stage has obvious effect on increasing flower and protecting pod, reducing shedding and increasing yield. Fertilization method: in the early flowering stage of soybean (early growth, delayed growth), 5-10 kg urea per mu. If the soil has strong fertility and the plant grows healthily, it should be applied less or not, so as not to cause the plant to grow madly, cause lodging or increase the shedding of flowers and pods. Combined with topdressing nitrogen fertilizer at flowering stage, foliar spraying phosphorus, potassium fertilizer, boron, molybdenum and other micro-fertilizer, it has a better effect of increasing yield. 2. Drought resistance
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