1. Agricultural use of magnesium sulfate heptahydrate as base fertilizer: Before the cultivated land, the agricultural seven-water magnesium sulfate can be mixed with other fertilizers or organic fertilizers and applied to the soil.
2, agricultural seven-water magnesium sulfate used in top dressing: with agricultural seven-water magnesium sulfate topdressing needs to be applied early, can be applied by ditch or water. Generally, it is suitable for applying 10~13 kg of magnesium sulfate heptahydrate for agricultural use per acre. Generally, each plant can be used with 250~500 g of magnesium sulfate for agricultural use. After the magnesium fertilizer is applied, it can be re-applied every few crops, and it is not necessary to apply it every season.
3. Agricultural use of magnesium sulfate heptahydrate for foliar application: In order to correct the symptoms of magnesium deficiency in crops, it is possible to use the agricultural seven-water magnesium sulfate for root dressing, but the foliar application of fertilizer is not durable, in order to achieve the effect should be continuously Spraying once. Foliar spray application of magnesium sulfate heptahydrate can be carried out in the early and middle stages of crop growth; the spraying concentration of magnesium sulfate heptahydrate for different growth periods of different crops is not the same. For: fruit trees 0.5~1.0 vegetables 0.2~0.5, rice, cotton, corn 0.3~0.8, general magnesium fertilizer solution application amount is about 50~150 kg.