Soybean special fertilizer and preparation method thereof

Abstract

The invention discloses a dedicated fertilizer for a soybean. The dedicated fertilizer is prepared by coating outer layer membranes which are made from a degradable material on inner layer fertilizer grains, wherein the inner layer fertilizer grains are prepared from the following raw materials in parts by weight: 43-45 parts of ammonium bicarbonate, 10-17 parts of potassium sulphate, 37-42 parts of monopotassium phosphate, 21-26 parts of diammonium hydrogen phosphate, 3-7 parts of boric acid, 8-12 parts of ammonium molybdate tetrahydrate, 1-3 parts of bean dregs and 2-4 parts of vinasse. In the dedicated fertilizer for the soybean and the preparation method of the fertilizer, provided by the invention, the dedicated fertilizer for the soybean can be released in long acting with gradual degradation of the external release control layer, so that the fertilizer decomposition and release time is prolonged, the application amount of the fertilizer can be lowered, the utilization rate of the fertilizer is increased, the fertilizer application time is reduced as one-time application can meet the requirement of whole growth period on the fertilizer, the waste can be avoided, the stress on the environment is reduced in the meantime, the eutrophication phenomenon due to over dosage of fertilizer application to the environment can be avoided; the preparation method is less in steps, simple to operate, good in coating effect between the release control layer and the inner layer fertilizer, and capable of increasing the release control efficiency.

Description

Technical field [0001] The invention relates to a special fertilizer for soybeans and a preparation method thereof, and belongs to the field of special fertilizers for crops. Background technique [0002] Soybean is an important oil crop. Its seeds are rich in protein and fat, as well as amino acids, fatty acids and vitamins. These substances have high nutritional value and are easily absorbed by the human body. It can be said that soybean is an important substance to improve people's material life and improve the quality of modern food. [0003] Soybean is a crop that requires a lot of fertilizer, because the formation of nutrients such as protein and fat requires a lot of nutrients, especially nitrogen, phosphorus, and potassium. Compared with other crops, the nitrogen and potassium content in soybean grains is more than twice that of wheat and four times that of rice. The phosphorus content is 30% more than wheat and 40% more than rice. [0004] Because the soybean roots have no...

AI Technical Summary

Problems solved by technology

Due to the excessive application of chemical fertilizers, water-soluble nutrients and other substances in the soil are leached into groundwater and rivers by rainwater and farmland irrigation water, causing groundwater and river pollution in some areas, making groundwater, rivers, and lakes eutrophic, resulting in poor groundwater. Delicious, fish and shrimp in some rivers and lakes often die

[0008] In order to meet the demand for fertilizers during the growth of soybeans, and avoid excessive application of fertilizers due to low utilization rates, resulting in waste of resources and pollution to the environment, it is particularly necessary to apply special controlled-release fertilizers to soybeans.