Magnesium fertilizer application technology

Magnesium, as a necessary middle-quantity element for plants, plays an important role in plant metabolism and growth. Due to the high temperature and rainfall in the red soils of southern China, the weathering of magnesium-containing minerals in the soil and the leaching of soil magnesium are strong, which results in the weak ability of the soil to supply magnesium, and the symptoms of magnesium deficiency in many areas. Researchers conducted field trials on 236 agricultural crops, oil crops, food crops, vegetable crops, and fruits in 236 crops in five categories, indicating that the application of magnesium fertilizer in the soil can increase crop yield and quality. About 25% of the dry land (including gardens, woodlands and available barren grassland) in the red soil region of southern China lacks magnesium, which covers an area of ​​300 million mu. Generally, about 4 kg of magnesium oxide is applied per acre, which can greatly increase the utilization efficiency of nitrogen, phosphorus, potassium and other nutrients, and can increase production by about 12%, and increase the net income by 60~125 yuan/mu. Calculated according to the average income of 80 yuan per mu, 300 million mu of magnesium-deficient dry land can create economic benefits of more than 24 billion yuan. The technical points for the effective application of magnesium fertilizer are as follows:

1. To consider the effective magnesium content of the soil: Magnesium fertilizer has a negative correlation between crop effectiveness and soil available magnesium content. When the available magnesium in the soil is less than 25 mg/kg, the increase in magnesium production for soybeans, peanuts, and tea leaves is large, reaching 9.8% to 40.2%. When the available magnesium in the soil is less than 50 mg/kg, the magnesium fertilizer has different degrees of increase in production, with an increase of 2.7% to 11.2%.

2. To consider the mutual effects of potassium and magnesium: The effect of magnesium application is limited by the potassium applied to the soil. After a large amount of potassium is applied to the soil, the amount of magnesium in the soil is insufficient, and potassium and magnesium in the soil have interactions. The appropriate ratio of potassium to magnesium is the basis for high yield and high efficiency. After repeated field trials, the more appropriate potassium and magnesium than sugar cane 3.3, cassava 5.1, peanuts, soybean 2.1, jute, sweet potato 2.4, watermelon 1.7.

3. To consider crop types and magnesium fertilizer demand: Magnesium fertilizer production increase effect is related to the magnesium demand of different crops and the sensitivity to magnesium levels. Flue-cured tobacco was sensitive to magnesium application, followed by rapeseed and soybeans, and wheat sensitivity was low.

4. To select the appropriate magnesium fertilizer varieties: different magnesium fertilizer varieties have different properties, the application effect is different. Magnesium carbonate (magnesium powder) and magnesia were best applied to red soil. The dry matter yield of crops increased by 76.1% and 87.3%; followed by magnesium sulfate and sepiolite (magnesium rich fibrous silicates), respectively. 31.0% and 22.5%; Magnesium chloride was the worst.

Sterilizer

Ningbo DOKEE Medical Technology Co., Ltd. , https://www.dokeemedical.com