Sodium sulphate, also known as mannite or anhydrous sodium sulphate, is an inorganic salt that has a wide range of applications in agriculture. Its mechanism of action is mainly through soil improvement, provision of nutrients and promotion of plant growth.
I. Sodium sulfate can neutralise the acidity of the soil and increase the pH value of the soil. Soil is the basis for plant growth, and the quality of soil directly affects the yield and quality of crops. Sodium ions and sulfate ions in sodium sulfate can combine with calcium ions in the soil to form a compound that is not easily soluble in water, which helps to change the structure of the soil and improve the permeability of the soil. At the same time, sodium sulphate can also increase the water retention capacity of the soil and reduce the evaporation of soil moisture, thus favouring the growth of plants. By applying sodium sulphate, the acidity in the soil is neutralised, allowing the pH of the soil to be regulated. This is necessary for most crops as most crops grow well in soils with a pH close to neutral.
ii. Sodium sulphate provides essential nutrients to plants. It is rich in sulphur and sodium, two elements that are essential for plant growth and development. Sulfur is an integral part of amino acids, enzymes and vitamins in plants and plays an important role in protein synthesis and photosynthesis. Sodium, on the other hand, is involved in osmoregulation and ionic balance in plant cells and helps maintain normal cellular function. Therefore, the application of sodium sulphate can supplement the plant's need for sulphur and sodium and promote healthy plant growth.
III. In practical application, farmers can mix sodium sulphate with other fertilisers or apply sodium sulphate directly into the soil according to the acidity of the soil and the needs of the crop. Through reasonable application of sodium sulfate, acidic soil can be well improved, and the fertility of soil and crop yield can be increased. Although sodium sulphate is good for amending acidic soil, excessive use may also lead to soil salinisation or other problems. Therefore, when using sodium sulphate, the principle of scientific fertiliser application should be followed to reasonably control the amount and frequency of application
IV. Used in the formulation of pesticides
Sodium sulphate can be used as a formulation component of pesticides. Some pesticides need to be used in conjunction with inorganic salts such as sodium sulfate to improve efficacy or reduce damage to plants. Through the use of pesticides, sodium sulfate can promote the penetration, absorption and conduction of pesticides, thus improving the use of pesticides and control effects1.
In conclusion, as an inorganic salt, sodium sulfate has a wide range of applications in agriculture. Its mechanism of action is realised through soil improvement, provision of nutrients and promotion of plant growth, providing important support and guarantee for the development of agriculture.