The nutrients necessary for crop growth include carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron, manganese, zinc, boron, molybdenum, and the like. Except for carbon, hydrogen and oxygen, which are extracted from nature by photosynthesis, the rest are derived from soil, which is called mineral element. Nitrogen, phosphorus and potassium are called large quantities of elements because of the large demand of crops; calcium, magnesium, Sulfur, iron, manganese, zinc, boron, molybdenum, copper, etc., are called medium and trace elements because of the demand for crops and the small amount of soil available. They are present in the soil as a component that can be directly or indirectly absorbed by the plant, ie the nutrients of the soil.
From the perspective of the role of nutrients, trace elements are also different from a large number of elements. A large number of elements are mainly involved in the composition of plant organisms, such as protein, starch, fat, cellulose, lignin, etc., while trace elements are mainly promoted or catalyzed in the physiological and biochemical processes in which a large number of elements form the above-mentioned organic substances, which are not themselves It is fixed in the composition of the body. Therefore, people often refer to a large number of elements as structural substances and trace elements as active substances. To make an image metaphor: If a large number of elements are equivalent to rice, meat, eggs and other foods consumed by humans, and trace elements are equivalent to salt, vitamins, etc., although the intake is small, but it is indispensable.
As the crop yield increases, the nutrients that the soil itself can provide are far from meeting the crop growth requirements, which requires us to supplement it by means of fertilization.
Different crops have their own unique fertilizer characteristics, and the fertilizer requirements and nutrient distribution ratios are different at each stage of growth. Therefore, mastering the soil nutrient status and adjusting the soil nutrient supply in a timely manner is essential for the normal growth and development of crops. The imbalance of nutrients caused by too little or too much has adverse effects on crops. Therefore, scientific application of fertilizers and efforts to create the best fertilizer and water environment for crops is the only way to achieve high quality and high yield.
From the perspective of the role of nutrients, trace elements are also different from a large number of elements. A large number of elements are mainly involved in the composition of plant organisms, such as protein, starch, fat, cellulose, lignin, etc., while trace elements are mainly promoted or catalyzed in the physiological and biochemical processes in which a large number of elements form the above-mentioned organic substances, which are not themselves It is fixed in the composition of the body. Therefore, people often refer to a large number of elements as structural substances and trace elements as active substances. To make an image metaphor: If a large number of elements are equivalent to rice, meat, eggs and other foods consumed by humans, and trace elements are equivalent to salt, vitamins, etc., although the intake is small, but it is indispensable.
As the crop yield increases, the nutrients that the soil itself can provide are far from meeting the crop growth requirements, which requires us to supplement it by means of fertilization.
Different crops have their own unique fertilizer characteristics, and the fertilizer requirements and nutrient distribution ratios are different at each stage of growth. Therefore, mastering the soil nutrient status and adjusting the soil nutrient supply in a timely manner is essential for the normal growth and development of crops. The imbalance of nutrients caused by too little or too much has adverse effects on crops. Therefore, scientific application of fertilizers and efforts to create the best fertilizer and water environment for crops is the only way to achieve high quality and high yield.
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