Safe use of micro-fertilizer on vegetables

Trace elements play an important role in the growth and development of vegetables. However, the critical range between many trace elements from lack to excess is very narrow. If the amount of micro-fertilizer applied is too large or uneven, it will cause toxic effects on vegetables. . The following describes the safe use of commonly used micro-fertilizers on general vegetables:

Iron fertilizer: The soil application rate is 1-3.75 kg/mu, and the foliar spray concentration is 0. 2%-1.0%. Boron fertilizer: soil application rate is 0.75-1.25 kg/mu, soaking concentration is 0.02%-0.5%, and foliar spray concentration is 0.3%-0.55%. Manganese fertilizer: soil application rate is 1-2.25 kg/mu, soaking concentration is 0. 05%-10.10%, and foliar spray concentration is 0. 05%-10.10%. Copper fertilizer: 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 0·2%—0·04%. Zinc fertilizer: The soil application rate is 0·25—2·50 kg/mu, the soaking concentration is 0·02%—0·05%, and the foliar spray concentration is 0·1%—0.5%. Molybdenum fertilizer: soil application rate 30-200 g/mu, soaking concentration 0.05-0·10%, foliar spray concentration 0.02%-0.50%, seed dressing 2-6 grams per kilogram of seed.

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