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Iron fertilizer (ferrous sulfate): The soil application rate is 1-3.75 kg/mu, and the foliar spray concentration is 0.2%-1.0%.
Boron fertilizer (borax or boric acid): The soil application rate is 0.75-1.25 kg/mu, the soaking concentration is 0.02%-0.05%, and the foliar spray concentration is 0.3%-0.5%.
Manganese fertilizer (manganese sulfate or manganese chloride): The soil application rate is 1-2.25 kg/mu, the soaking concentration is 0.05%-0.10%, and the foliar spray concentration is 0.05%-0.10%.
Copper fertilizer (copper sulfate): The soil application rate is 1.5-2.0 kg/mu, the soaking concentration is 0.01%-0.05%, and the foliar spray concentration is 0.02%-0.04%.
Zinc fertilizer (zinc sulfate): soil application rate 0.25-2.50 kg / mu, soaking seeds. 02% -0.05%, foliar spray concentration 0.1% -0.5%.
Molybdenum fertilizer (ammonium molybdate): The soil application rate is 30-200 g/mu, the soaking concentration is 0.05%-0.10%, the foliar spray concentration is 0.02%-0.05%, and the seed dressing is 2-6 g per kg of seed.
Safe use of micro-fertilizer on vegetables
Trace elements play an important role in the growth and development of vegetables (such as nitrogen, phosphorus, potassium, etc.). Once a trace element is lacking, vegetables will show corresponding symptoms of deficiency, but many trace elements are lacking. The critical range between the excess is very narrow, and if the amount of micro-fertilizer applied is too large or uneven, it tends to have a toxic effect on vegetables. The following is the safe use of commonly used micro-fertilizers on general vegetables:
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