What kind of fertilizer is magnesium fertilizer? What are the magnesium fertilizers? What are the functions and effects of magnesium fertilizers? BY:Cynthia
Magnesium, as an essential secondary element for plants, plays an important role in plant metabolism and growth and development. When plants are deficient in magnesium, the most prominent manifestation is a decrease in chlorophyll content and the onset of chlorosis. So, what kind of fertilizer is magnesium fertilizer? What are the magnesium fertilizers? What are the functions and effects of magnesium fertilizer?
What is magnesium fertilizer?
Magnesium is mainly found in chlorophyll, phytochemicals and pectin, and plays an important role in photosynthesis. Magnesium ions are activators of various enzymes, promoting the conversion and metabolism of sugars in the body, and promoting the synthesis of fat and protein. Applying magnesium to oil crops can increase their oil content, and magnesium can also promote the crops' absorption of silicon.
What are magnesium fertilizers?
Commonly used magnesium fertilizers include magnesium sulfate, magnesium chloride, magnesite, dolomite, and magnesium fertilizer. In addition, organic fertilizers also contain a certain amount of magnesium. The application of magnesium fertilizer can be divided into base fertilizer and topdressing.
(1) For base fertilizer, use 10-15 kg of magnesium sulfate (MgSO4.7H20) per 667 m, which is approximately equivalent to applying 1.6-24 kg of MgSO. Fertilizer should be applied shallowly to facilitate crop absorption. If applied on acidic soil, dolomite powder is suitable, which can provide magnesium and calcium and reduce soil acidity;
(2) Topdressing: usually 1%~2% magnesium sulfate solution is sprayed once every 7 days for 2~3 times. If applied to the soil during the peak fruit-bearing period of Piju, usually 0.2~0.3 kg is applied per hole. . In order to improve the application effect of magnesium fertilizer, two points should be paid attention to:
①Strictly control the dosage. Excessive application of magnesium fertilizer will cause an imbalance in the ratio of magnesium to other nutrients. For example, although rubber is a crop that requires more magnesium, excessive magnesium application will cause difficulty in rubber removal and reduce yield;
② Choose magnesium fertilizer according to the soil. Different magnesium fertilizers have different effects on soil acidity and alkalinity. Magnesium sulfate and magnesium chloride are suitable for soils close to neutral or slightly alkaline; magnesite, dolomite powder, limestone powder, potassium magnesium fertilizer, calcium magnesium phosphate fertilizer, etc. are suitable for acidic soils. .
The role and efficacy of magnesium fertilizer
The role and function of magnesium fertilizer are mainly reflected in three aspects. First, it can promote better synthesis of chlorophyll. Only after the magnesium atom combines with the chlorophyll molecule can it have the necessary structure to absorb light quanta. Second, it can promote protein synthesis, and magnesium is necessary for polyribosomes. The third is enzyme activation. Magnesium is more effective than other ions in activating phosphokinase.
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