The application of zinc fertilizer should vary from place to place, varies from crop to crop, and cannot be applied blindly. Zinc fertilizer is applied to zinc-deficient land and zinc-sensitive crops. In general, when the effective zinc content in the soil is lower than 0.5 mg per kilogram, the effect of zinc fertilizer application is significant; when the soil effective zinc content is higher than 1 mg per kilogram, zinc fertilizer is generally not required. The zinc-sensitive crops include corn, sorghum, soybeans, cotton, tomatoes, potatoes, etc. The application of zinc fertilizers should be particularly important for these crops.
The zinc fertilizer is micro-fertilizer, and the crop needs less of it. The application of zinc fertilizer exceeds the general meeting to produce toxic effects on the crop or affect the health of people and livestock. When zinc fertilizer is used as a base fertilizer, according to the degree of soil zinc deficiency, 0.5 to 2 kg of zinc sulfate is applied per acre. When zinc fertilizer is used as top dressing, 0.75 to 1 kg of zinc sulfate per mu can be mixed with appropriate amount of fine soil, or 90 to 180 grams of zinc sulfate per mu can be sprayed on sunny days for 60 kg of water.
Zinc fertilizer cannot be mixed with phosphate fertilizers. Due to the combination of zinc fertilizer and phosphate fertilizer, zinc phosphate precipitates are easily formed, which not only reduces the effectiveness of zinc fertilizer but also reduces the effectiveness of phosphate fertilizer.
Zinc fertilizer cannot be mixed with alkaline fertilizers and alkaline pesticides. Due to the combination of alkaline fertilizers such as zinc fertilizer and lime, turfgrass, and ammonia, acidic and basic ions react chemically to reduce the effect of fertilizers. Similarly, the effectiveness of zinc fertilizer mixed with alkaline pesticides such as Bordeaux mixture and lime sulfur will also decrease.
In addition, zinc fertilizer has a post-effect, does not require continuous application, generally better effect every year.
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