Boron deficiency in crops can be supplemented by the application of boron fertilizer to normalize crop growth. The method of applying boron fertilizer generally includes three kinds of base fertilizer, topdressing fertilizer and seed fertilizer. (1) Base fertilizer, that is, the fertilizer is applied to the soil before planting the crop to supply the whole growth and development period of the crop. (2) Top dressing, that is, when the crop is grown to a certain height, boron fertilizer is applied to the crop. There are two methods for topdressing: one is spraying, that is, the boron fertilizer is dissolved into a certain concentration of aqueous solution and sprayed on the leaf surface with a sprayer; the second is soil dressing, that is, when the crop grows to a certain height, the boron fertilizer is applied to the root of the crop. In the soil. (3) Seed Fertilizer. Before the sowing, open the ditch or dig a hole to apply boron fertilizer and mix it with the soil. Then, sowing. Pay special attention to the application of the seed fertilizer. Do not make the seed contact with the boron fertilizer, otherwise it will cause the seedling to affect the seedlings. The techniques for applying boron fertilizer to the main crops are as follows: 1. Cotton 1. Base fertilizer: 0.5 kg of borax per acre and 10-15 kg of mixed fine soil per acre. Apply a ditch or a hole to the soil before sowing. Do not make the boron fertilizer contact the seeds. Do not excessively apply boron fertilizer to avoid wasting fertilizer and prevent excessive poisoning. 2, top dressing: 0.5 kg of borax per acre mix fine dry soil 10-15 kg, the soil topdressing in the cotton seedling stage, can also be applied with the chemical fertilizer evenly together, from the cotton seedlings 7-10 cm ditching or digging Apply. 3. Artificial spraying: Use 0.2% borax aqueous solution or 0.1% boric acid aqueous solution in the bud period of cotton. The initial flowering period and flowering period are each sprayed once, and the spray volume is 50-80 kg per mu. Second, legumes 1, base fertilizer: 0.4-0.5 kg of borax per acre, mixed with fine soil 10-15 kg applied to the side of the seeds in the sowing ditch (or hole), do not touch the seeds, cover soil after sowing. 2. Spraying: 0.2% borax aqueous solution or 0.1% boric acid aqueous solution, soybean from seedling stage to flowering stage, faba bean stage from seedling stage to initial flowering stage, peanuts applied from seedling stage to crusting stage 2-3 times per mu. The amount of fertilizer used is 50-75 kg. Third, the economic crops 1, base fertilizer: sugar beet 0.5-0.7 kg per acre with borax, mix fine dry soil 10-15 kg or 7-10 kilograms of boron and magnesium fertilizer application or hole in the soil, apply back cover soil. Sesame base application borax 1-1.5 kg per mu, mix fine dry soil 10-15 kg, spread in the soil. 2, spray: with 0.2% borax aqueous solution, sugar beet in the seedling stage, luxuriant period, the root formation phase of a spray, sugarcane in the seedling stage, tiller stage, elongation of the spray one time, tobacco in the seedling period to long-term spray Application 2-3 times, sesame in bud stage, flowering each spray 1, sunflower in the disk to flowering spray 2-3 times. Each spray volume per mu is 50-80 kg. Other vegetables are generally better at the early stage of growth. Fourth, food crops 1, base fertilizer: rice, corn, wheat and other food crops, 5 to 7.5 kg of magnesium boron per acre or 0.5 kg of borax. 2. Spraying: Using 0.2% borax or 0.1% boric acid aqueous solution, rice is sprayed once during the booting stage and flowering stage, and wheat is sprayed once during the booting stage and the grain filling stage. Corn is sprayed during the seedling stage and the small bellmouth stage. 1 time, 50-80 kg per mu.
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