In the production of vegetables, excessive use of micro-nutrients can cause toxicity to vegetable production. In the absence of micro-nutrients, quality and yield are affected. The following describes the use of several major fertilizers dose. 1. Zinc sulfate: Generally, the dosage per acre is 1.5-2.5 kg, the soaking concentration is 0.02-0.05%, and the foliar spraying concentration is 0.1%-0.5%. 2. Copper sulphate: The general application amount is 1.5~2 kg per acre, the soaking concentration is 0.02~0.05%, and the foliar spraying concentration is 0.2~0.5%. 3. Manganese sulphate: The general mu application rate is 1~1.25 kg, the soaking concentration is 0.05%~0.1%, and the foliar spraying concentration is 0.05%~0.15%. 4. Ferrous sulfate: The dosage per acre is 1~3.5 kg (according to the increase and decrease of soil acidity). Foliar spraying concentration 0.2~1%. 5. Zinc molybdate: The application rate per acre is 30-200 g, the soaking concentration is 0.05%-0.1%, and the foliar spraying concentration is 0.02%-0.05%.
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