Soybean replanting measures
Reasonable rotation, minimization of heavy lifting, and maintaining a proper proportion of greetings. The fundamental way to solve the problem of soy bean cropping is to maintain a reasonable crop rotation system. In the current situation where soybeans are unavoidably greeted, we should distinguish between heavy cropping and planting (planting every other year), minimize the number of crops, and properly manage the crops. . The wind-sand saline-alkaline soil area, as well as the inhospitable slopes and cyst nematode diseases, sclerotinia, and severely rooted plots cannot be planted to meet soybean crops. We can choose Pingchuandi and Ertuo, which have high organic content, planting soybeans with heavy weight, and heavy weeds can only be heavy for one year. For those plots that are developed late and have high organic matter content, although they can be appropriately weighted, they cannot be excessively long. Use strong resistance varieties. Research and practice at home and abroad have proven that the selection of disease-resistant or disease-resistant varieties is an effective measure to reduce the impact on the yield and quality of soybeans. In addition, we should do a reasonable mix of different varieties, rotation planting to reduce the risk of re-welcome. Changing the use of varieties can effectively reduce the risk of serious accidents. Rational farming, increase fertilization, improve the soybean breeding environment. Soybeans are heavily plucked, especially in successive years, resulting in tight compaction of the soil, lack of a reasonable pellet structure, and reduced fertility. In terms of soil cultivation, we must adhere to the soil cultivation system that combines loose, upturned, hoeed, and rotated soils that are mainly deep-soiled and vigorously promote deep-seeding cultivation methods. Increasing the use of organic fertilizer can not only balance the supply of soybean nutrition, but also improve the adverse soil environment caused by heavy grazing. It is an effective measure to reduce production loss. Due to the decrease of available nitrogen content, scarcity of root nodules, and weakening of nitrogen fixation capacity in the heavily ploughed plots, the effects of topdressing nitrogen fertilizers at seedling stage or flowering stage of soybeans are quite obvious under the condition of insufficient nitrogen fertilizer. Can be applied in the soybean three-leaf stage 30-60 kg / ha urea, or topdressing urea 67.5 kg / ha in the beginning of the flowering period, the rate of increase are more than 10%. Increase the sowing density appropriately. Due to aggravation of pests and diseases in the re-cultivated land and deterioration of the soil environment, it is extremely unfavorable to soybean growth and is likely to cause seedling deficiency. Therefore, for re-cultivation plots, appropriate increase in the amount of sowing is generally 8% -10% higher than that of Zhengyu soybean, and the quality of sowing is increased, and the number of seedlings is increased. Strengthen field management and prevent pests and weeds. If soybean growth is poor, use 10 kg of urea per hectare, 1500 g of potassium dihydrogen phosphate, and 66 g of potassium sulfate, and dissolve in 500 kg of water for foliar application; if you do not use micronutrient as seed fertilizer or useless micronutrient fertilizer For seed dressing, fertilizer can be sprayed appropriately.