1. Apply to soil

As a base fertilizer, it should be mixed with other chemical fertilizers or organic fertilizers before ploughing, or applied separately after mixing with fine fertilizers. Topdressing should be applied early, ditched or washed.The suitable dose of magnesium fertilizer applied to soil is 10-13 kg per mu, and the amount of pure magnesium converted is 1-1.5 kg per mu. After a single application, it can be applied after several crops, not every season.

2. Spray on the leaves

Liquid foliar fertilizer: Applied to leaves during the early and middle stages of crop growth.Different crops, the same crop in different growth period, need different spray concentration.Should master the spray concentration of magnesium sulfate water solution, fruit trees are 0.5%-1.0%, vegetables are 0.2%-0.5%, rice, cotton, corn and other field crops are 0.3%-0.8%, magnesium fertilizer 50-150 kg per mu.