Magnesium nitrate hexahydrate can be used as foliar spraying of crops.

Magnesium nitrate hexahydrate, colorless crystal. Deliquescent. Soluble in water, the solution is neutral, soluble in methanol and ethanol, insoluble in ether. Spontaneous combustion occurs when mixed with organic matter. It is the most stable magnesium nitrate hydrate at room temperature. Oxidizing. Explosive mixture can be formed by mixing with reducing agent, organic matter, combustibles and metal powder. Combustion or explosion can be caused by friction, vibration or impact. Magnesium is a component of chlorophyll. Lack of magnesium, chlorophyll could not form, photosynthetic performance decreased, and affected phosphorus absorption. Magnesium is an indispensable component of chlorophyll. Calcium and magnesium pectin salts in the cell wall contain a lot of magnesium. Magnesium is the activator of carboxylase and phosphorylase. It directly participates in photosynthesis and promotes carbohydrate metabolism. Magnesium can move in plants. The symptoms of magnesium deficiency are first manifested in the old leaves, which is different from the symptoms of iron deficiency.

For fruit trees, magnesium can promote the synthesis of proteins, lipids and other substances, promote fruit hypertrophy and improve fruit quality. If magnesium is deficient, chlorophyll cannot be formed, showing chlorosis. In severe cases, the basal leaves of new shoots fall off early, and the contents of soluble solids, citric acid and vitamin C in fruit juice are greatly reduced, affecting the yield and quality. Magnesium is a component of plant chlorophyll and phytohormone. It is a metal element in chlorophyll molecules. Magnesium plays an important role in photosynthesis. Magnesium ion is an activator of many enzymes, which can promote the conversion and metabolism of sugars in crops, and promote the synthesis of fat and protein. Magnesium can also promote the absorption of silicon and phosphorus by crops, so as to improve the disease resistance of crops. Magnesium can also promote the formation of vitamin A and vitamin C in crops, so as to improve the quality of fruits, vegetables and other crops. Magnesium nitrate hexahydrate can be used as foliar spraying of crops. It is mainly used for magnesium deficiency symptoms caused by root system obstacles of fruit trees, eggplant fruits, vegetables and legumes. The commonly used magnesium nitrate hexahydrate content is 1%. Because the foliar spraying fertilizer effect is not lasting, it should be sprayed several times continuously in order to achieve the effect.