Vegetable growth problems
Boron fertilizer
The boron deficiency of vegetables is obviously manifested in the thickening of the stems and petioles of plants, brittleness and easy division, poor root system development, dark green leaves, pale and deformed new leaves, damaged or necrotic growth points, abnormal flower development, and prolonged growth period.
Borax fertilizers commonly used in production are borax and boric acid. Boron fertilizer can be used as base fertilizer, topdressing fertilizer, and seed fertilizer. When boron-deficient soil is used as base fertilizer, borax or boric acid is applied in an amount of 0.5 to 1.5 kg per acre. When used as a seed fertilizer, the concentration is 0.01% to 0.1%. The amount of fertilizer used for seeds is 0.4 to 1 kg; foliar spraying should be applied with 0.1% to 0.2% borax or 0.05% to 0.1% boric acid solution. Molybdenum fertilizer
Vegetables are deficient in molybdenum, grow poorly and are short, and their leaves are green and withered, leading to death. Commonly used molybdenum fertilizers are ammonium molybdate and sodium molybdate. Molybdenum fertilizer is generally used as seed dressing, seed soaking and spraying outside the root. When dressing seeds, the average amount of fertilizer for 1 kg of seeds is 2 to 6 grams; 0.05% to 0.1% of the molybdenum fertilizer solution is used for soaking seeds; and the concentration of topdressing outside the root is 0.01% to 0.1%.
Manganese fertilizer
Manganese deficiency in vegetables is mainly manifested by the loss of greenness and yellowing between young leaves and veins, and small brown spots appear, and the plants stop growing. The manganese fertilizer commonly used in production is manganese sulfate. When it is used as a base fertilizer, 3 to 5 kilograms per acre is sprinkled; 5 to 7 grams of 1 kg of seeds are used for seed dressing; the soaking concentration is 0.05% to 0.1%; The concentration is 0.05% to 0.1%.
Zinc fertilizer
Vegetables lack zinc, the petiole is rolled back, the leaves are green, the leaves are clustered, the internodes are shortened, the plants are short, and the yield is significantly reduced. The most widely used zinc fertilizer in production is zinc sulfate. Zinc fertilizer as base fertilizer uses 1.0 to 1.5 kg of zinc sulfate per acre, but it must be noted that zinc fertilizer cannot be mixed with phosphate fertilizer; 0.02% to 0.04% zinc sulfate solution is used when soaking seeds; the average amount of 1 kg of seed fertilizer when dressing is 2 to 4 grams; foliar spray application of zinc sulfate solution at a concentration of 0.01% to 0.05%.
Copper fertilizer
Copper deficiency, plant dwarfing, seedling yellowing deformity, apical meristem necrosis. The copper fertilizer commonly used in production is copper sulfate. Copper sulfate is used as a base fertilizer of 1 kg per acre, and it is mixed with the soil evenly when applied; foliar spray is applied with a solution of 0.02% to 0.04%. To avoid phytotoxicity to the leaves, a small amount of slaked lime can be added to the solution.
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