What is the function of agricultural magnesium sulfate?

What is the function of agricultural magnesium sulfate? What are the ways to use agricultural magnesium sulfate? Also ask the netizens who know to help introduce magnesium sulfate, also known as sulfur bitter salt, cathartic salt and other names, generally refers to magnesium sulfate heptahydrate and magnesium sulfate monohydrate, magnesium sulfate can be used in industry, agriculture, food, feed, medicine, fertilizer and so on. Therefore, the farming network specially sorted out the function and application method of magnesium sulfate in agriculture. The role of agricultural magnesium sulfate: magnesium sulfate contains two essential nutrients for crops, sulfur and magnesium. Magnesium sulfate can not only increase crop yield, but also improve the taste of crop fruit. Because magnesium is the component of chlorophyll and pigment and the only metal element in chlorophyll molecules, magnesium can promote photosynthesis and promote the formation of carbohydrates, proteins and fats. Magnesium is the activator of hundreds of enzymes and participates in the composition of some enzymes to promote metabolism in crops. Magnesium can improve the disease resistance of crops and prevent the invasion of germs. Magnesium can also promote the formation of vitamin An and vitamin C in crops, thus improving the quality of fruits, vegetables and other crops. Sulfur is necessary for the synthesis of amino acids, proteins, cellulose and enzymes in crops. The application of magnesium sulfate at the same time can also promote the absorption of silicon and phosphorus by crops. The application method of agricultural magnesium sulfate: 1. Magnesium sulfate is used as base fertilizer: magnesium sulfate can be mixed with other fertilizers or organic fertilizers in the soil before cultivated land. 2. Magnesium sulfate is used as topdressing fertilizer: magnesium sulfate topdressing should be applied early, and ditch application or flushing application with water can be used. Generally, each mu of land is suitable for the application of magnesium sulfate 10kg to 13kg, and each fruit tree can apply 250kg magnesium sulfate to 500g. After applying enough magnesium fertilizer, it can be applied every few crops, not every season. 3. Magnesium sulfate is used for foliar spraying: in order to correct the symptoms of magnesium deficiency in crops, magnesium sulfate can be used as extra-root topdressing, but the effect of foliar spraying is not long-lasting, so it should be sprayed several times in succession in order to achieve the effect. Foliar spraying magnesium sulfate can be carried out in the early and middle stages of crop growth; the concentration of magnesium sulfate sprayed in the growth period of different crops is also different. Generally, the concentration of magnesium sulfate foliar spraying is 0.5% 1.0% for fruit trees, 0.2% 0.5% for vegetables, 0.3% 0.8% for rice, cotton and corn, and the general application rate of magnesium fertilizer solution per mu is about 50-150 kg. Magnesium fertilizer application suggestion: the effect of magnesium fertilizer combined with farm fertilizer and organic fertilizer is often better than that of magnesium fertilizer alone. What is calcium magnesium phosphate fertilizer? What should be paid attention to when urea is sprayed with foliar fertilizer