Technical points for applying watermelon micro-fertilizer

Zinc fertilizer mainly uses zinc sulfate, which can be used as base fertilizer, seed fertilizer and top dressing. It uses 1 - 1.5 kg of zinc sulfate per 667 square meters (1 mu) and is applied as a base fertilizer. However, it cannot be mixed with phosphate fertilizer. Seed soaking with 0.1% solution, seed dressing (1 g zinc sulfate per kg of seed) or foliar top dressing with 0.01-0.05% zinc sulfate.

Boron fertilizer, borax, boric acid, boron magnesium fertilizer, boron-containing superphosphate, etc., of which boron magnesium fertilizer and calcium borate are mainly used as base fertilizer, the amount of each 667 square meters (1 mu) is 20-30 kg, 40- 50 kg, borax and boric acid are generally used as root dressings at a concentration of 0.01%, and may also be soaked with 0.1% boric acid or borax.

Molybdenum fertilizer. Commonly used ammonium molybdate, can be used as base fertilizer, seed fertilizer and top dressing. The soaking concentration was 0.05%-0.1%, the soaking time was 12 hours, and the external top dressing concentration was 0.02%-0.05%. The spraying effect was best in the seedling stage and the pumping stage.

Copper fertilizer. Commonly used copper sulfate. Can be used as base fertilizer, 0.1-0.3 kg per 667 square meters (1 mu), can be soaked with 0.1% solution, and can also be used for root dressing with 0.05% solution.