Introduction to Boron Fertilizer knowledge

The main results are as follows: (1) at present, the main types and properties of boron fertilizer are borax, boric acid, boron-containing calcium superphosphate, boron-magnesium fertilizer and so on. (2) the application of boron fertilizer crop type and boron fertilizer application: different crop types, different boron requirements. At present, the crops with obvious boron deficiency in China are rape, sugar beet, cotton, Chinese cabbage, cabbage, radish, celery, greenhouse cucumber, soybean, apple, pear, peach and so on. The crops requiring moderate boron are corn, millet, potato, carrot, spring onion, pepper, peanut, tomato and so on. Under the same soil conditions, boron fertilizer should be given priority to these crops with high boron demand. Soil conditions and boron fertilizer application: the content of water-soluble boron in soil is closely related to the fertilizer efficiency of boron fertilizer, which is an important basis for determining whether to apply boron or not. according to the research of Oil crop Research Institute of Chinese Academy of Agricultural Sciences, Shanghai Academy of Agricultural Sciences and Zhejiang Academy of Agricultural Sciences, it is serious boron deficiency when soil water-soluble boron content is lower than 0.3mg/ kg, and boron deficiency when lower than 0.5mg/kg. Boron fertilizer can significantly increase yield. Boron fertilizer should be preferentially distributed in soils with low content of water-soluble boron. The content of boron in soil is also related to the application method of boron fertilizer. when the soil is seriously boron deficient, the base fertilizer is better, and the soil with mild boron deficiency usually adopts the method of extra-root topdressing. Application technology of boron fertilizer: boron fertilizer can be used as base fertilizer, topdressing fertilizer and seed fertilizer. As base fertilizer, it can be used in combination with P and N fertilizer, or it can be applied alone. Generally, when 0.25kg-0.5kg boric acid or borax is applied to each 667m2, it must be applied evenly to prevent excessive concentration and poisoning. Topdressing is usually used as extra-root topdressing, with a concentration of 0.1% Mel 0.2% borax or boric acid solution, with a dosage of 50kg-75kg per 667m2, which is sprayed once at the seedling stage and when the crop is transferred from vegetative growth to reproductive growth. Seed fertilizer is often used to soak and mix seeds, soaking seeds with 0.1% boric acid or borax solution with a concentration of 0.01% UV 0.1%, soaking for 6-12 hours, and sowing seeds after drying. Cereals and vegetables can use 0.01% muri 0.03% solution, rice can use 0.1% solution. When mixing seeds, use borax or boric acid 0.2g-0.5g per kg of seeds.