Soil is the most important material basis for plant growth. Nowadays, as farmers apply fertilizer blindly and unscientifically, soil deterioration is becoming more and more serious. Soil deterioration is mainly reflected in soil acidification, soil hardening, increased salinization, lack of trace elements, and imbalance of soil microbial flora.
Magnesium is an essential nutrient element for plants and plays an important role in the physiological and biochemical processes of plants. However, magnesium is often ignored in agricultural production, resulting in frequent magnesium deficiency. This is related to the one-sided understanding of magnesium among agricultural practitioners. This article focuses on the magnesium demand and absorption process of plants, as well as the application of magnesium fertilizer, with a view to providing guidance for agricultural production.