Soybean special-purposed composite fertilizer application method

Abstract

The invention relates to a soybean special-purposed composite fertilizer application method. The method comprises the step that a composite fertilizer is applied in a field in a soybean growth period. The composite fertilizer comprises a nitrogen fertilizer, a phosphorus fertilizer and a potassium fertilizer. The method is characterized in that a potassium fertilizer application amount in unit area of field is as shown in the formula. In the formula, CorpK-out is the mass of potassium brought out of the field when the soybean in the unit area of field is harvested. EnvK-in is the mass of potassium entering the unit area of field from the environment. RatK-out is potassium loss rate of the unit area of field. alpha is a potassium fertilizer application correction coefficient, wherein alpha=standard available potassium content / field soil available potassium content. With the above technical scheme, the fertilization amount recommended by the invention assists in providing supplementation in nutrient absorption during a soybean growth period, and assists in providing supplementation for soil nutrient loss during the soybean growth period. Therefore, soil nutrient balance can be maintained, soil continuously supplying capacity is maintained, and soybean high and stable yield can be ensured.

Description

technical field [0001] The invention relates to the field of agriculture, in particular to a method for applying a special compound fertilizer for soybeans. Background technique [0002] Soybean (Glycine max L.) belongs to Papilionaceae, an annual herb plant, also known as soybean, kidney bean, etc. Soybean originated in China and has a history of four to five thousand years. It is one of the main cultivated crops in my country. In 1949, my country's soybean planting area was 8,319,000 hectares. By 2012, the soybean planting area had decreased to 7,171,000 hectares, but the total soybean production increased from 5.09 million tons in 1949 to 13.01 million tons in 2012. Soybean is not only a food crop, but also an important oil crop and vegetable. It is rich in protein, vitamin A, B, C and other nutrients. Soybean needs a lot of nitrogen, but as a symbiotic nitrogen-fixing leguminous crop, 40%-60% of the nitrogen needed during the growth period can be supplied by the nitrog...

AI Technical Summary

Problems solved by technology

At present, farmers rely more on experience in fertilizing soybeans, which can easily lead to imbalances in nutrient input and damage the balance of soil nutrients, resulting in low soybean yields and unstable yields

In some areas, soybean fertilization has the problem of insufficient total fertilizer input and excessive fertilizer input. Heavy application of nitrogen, light phosphorus and potassium will lead to imbalance of soil nutrients and deterioration of soybean growth environment

Unscientific application of chemical fertilizers can easily lead to nutritional imbalances, soil compaction, decline in soil fertility, and insufficient organic matter. The nutritional quality of soybeans decreases, the yield is low, and the stress resistance is poor, which inhibits the further increase of soybean yield.

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