Magnesium is an essential nutrient element in plant growth. It is not only an important component of chlorophyll, but also plays an important role in photosynthesis. It is also an activator of various enzyme metabolism in plants, playing an important role in nitrogen metabolism, carbon metabolism, fat and reactive oxygen species. Generally speaking, acidic soils in the south are prone to sulfur deficiency, while vegetables that prefer sulfur rich vegetables such as onions and garlic are prone to sulfur deficiency. The main characteristic of sulfur deficiency in crops is chlorosis. The soil magnesium content in red soil areas of China is 0.06-0.3%, and the exchangeable magnesium content is 60-120mg/kg, which often cannot meet the needs of crops. Applying magnesium fertilizer on acidic soil, high leaching soil, swampy soil, and sandy soil has a more significant effect.
Used to increase yield and taste of tomatoes.
Used for flue-cured tobacco
Calcium and magnesium are important intermediate elements that affect the yield and quality of flue-cured tobacco. An appropriate amount of magnesium is beneficial for the growth and quality of flue-cured tobacco. Field experiments were conducted to investigate the effects of calcium and magnesium fertilizers on the growth and yield of flue-cured tobacco in Martha's mud fields. The results showed that under the conditions of applying calcium fertilizer, the yield of magnesium 15kg/hm2 was the highest, reaching up to 2709kg/hm2, which was 3.6% higher than that without magnesium fertilizer. Fully applying magnesium fertilizer or mixing magnesium and calcium fertilizer can increase the plant height and leaf number of tobacco seedlings, and promote growth. With the increase of magnesium application, the yield of tobacco leaves and the grade of flue-cured tobacco show a trend of first increasing and then decreasing. Increasing the application of magnesium under calcium application conditions can greatly increase the nutrient content of potassium and magnesium in tobacco leaves.
Magnesium sulfate used as foliar fertilizer
Leaf fertilization refers to spraying one or more nutrients onto the leaves of a crop in a certain proportion and concentration to directly or indirectly supply nutrients. The function is to apply fertilizer outside the root, which is the supplement of soil fertilizer. Leaf fertilization is mainly used to supplement elements such as nitrogen, potassium, calcium, magnesium, and sulfur. Obviously, magnesium sulfate supplements magnesium and sulfur. Magnesium sulfate is a soluble physiological acidic fertilizer. It can be used as a base fertilizer, topdressing, foliar fertilizer, and nutrient solution for soilless cultivation.
Production and application methods of foliar fertilizers containing magnesium sulfate
Liquid foliar fertilizer measures various fertilizers according to the formula and can be dissolved in a fixed amount of water before use. Usually, it is used and prepared on-site. Spray 50-150kg per 667m2 (1 acre). Solid foliar fertilizer is measured according to the formula for various fertilizers, crushed and mixed before packaging the finished product. The spray concentration used by different crops is different, and the spray concentration of the same crop in different growth periods is also different. The concentration of fruit trees is 0.5% -1%, that of vegetables is 0.2% -0.5%, and that of rice, wheat, cotton, corn and other field crops is 0.3% -0.8%. Spray 50-150kg of aqueous solution per 667m2 (1 acre).
