Potassium humate compound fertilizer and preparation method thereof

Abstract

The invention belongs to the field of a fertilizer, in particular to a potassium humate compound fertilizer and a preparation method thereof. The potassium humate compound fertilizer is prepared by mixing urea, potassium humate, monoammonium phosphate, ammonium chloride, calcium powder and bentonite with magnesium sulfate, zinc sulfate and medium / trace elements. The potassium humate compound fertilizer granulated by using a steam drum physical agglomeration method and the preparation method of the compound fertilizer have the advantages that the prepared potassium humate compound fertilizer has large particle size and high strength and does not agglomerate; the capabilities of water and fertility retention, heat preservation and ventilation of the soil are enhanced; the soil structure is improved; the soil fertility is increased; the problems of reduced soil fertility, environmental pollution, soil hardening, nutrition unbalance and stress resistance of crops are solved; the utilization rate of the fertilizer is improved; the defects of low fertilizer efficiency, insufficient nutrition utilization, overproof pesticide residue, severe nitrate accumulation and heavy metal pollution are overcome; the sustained-release effect against pesticide is realized; the agroecological environment is protected; and the efficiency, yield and crop quality are improved.

Description

Technical field: [0001] The invention belongs to the field of fertilizers, and in particular relates to a potassium humate type compound fertilizer and a preparation method thereof. Background technique: [0002] my country is a large agricultural country. In recent years, the use of chemical fertilizers has gradually increased. Although the grain output has increased, the quality of agricultural products has also been reduced, which has brought certain harm to people's health. For example, pesticide residues exceeding the standard, nitrate The accumulation is serious, heavy metal pollution, pathogenic microorganism pollution, etc. occur from time to time. At the same time, the long-term use of chemical fertilizers also causes problems such as soil fertility decline and hardening, which seriously affects normal agricultural production and the improvement of life quality. It is very worrying that the utilization rate of chemical fertilizers is low. , environmental pollution, so...

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Problems solved by technology

[0002] my country is a large agricultural country. In recent years, the use of chemical fertilizers has gradually increased. Although the grain output has increased, the quality of agricultural products has also been reduced, which has brought certain harm to people's health. For example, pesticide residues exceeding the standard, nitrate The accumulation is serious, heavy metal pollution, pathogenic microorganism pollution, etc. occur from time to time. At the same time, the long-term use of chemical fertilizers also causes problems such as soil fertility decline and hardening, which seriously affects normal agricultural production and the improvement of life quality. It is very worrying that the utilization rate of chemical fertilizers is low. , environmental pollution, soil compaction and a series of problems, especially the volatilization and leaching of effective nutrients in the soil reduces the utilization rate of fertilizers, which not only causes a serious waste of resources, but also causes certain pollution to the ecological environment of soil and water systems. At the same time, the single use of chemical fertilizers also virtually reduces the quality of agricultural products, threatening human life and health;

[0003] With the continuous improvement of agricultural output and multiple cropping index, coupled with years of cultivation that only pay attention to nitrogen, phosphorus, and potassium, the use of soil fertilizer is insufficient, and the organic matter in the soil is getting less and less, resulting in the decline of soil fertility, soil compaction, nutrient imbalance, and crop resistance. Reversibility, which restricts the improvement of crop yield and the exertion of fertilizer efficiency, the phenomenon of high input and low output has appeared in agricultural planting, which has brought certain economic losses. Investigations have been conducted on different soils, and soil compaction and low fertilizer efficiency are common. , Insufficient utilization of nutrients and other issues, the stress resistance of some crops has become a factor limiting crop production and a bottleneck for crop benefits. Due to the comprehensive influence of fertilizer properties and soil environmental conditions, low fertilizer utilization is common in the use of chemical fertilizer There are major problems. At present, the seasonal utilization rate of domestic chemical fertilizers is about 30%-35% for nitrogen, about 10%-20% for phosphorus, and about 30%-35% for potassium. The loss of nitrogen is particularly serious Due to improper fertilization, eutrophication of surface water has occurred in some areas, the content of nitrate nitrogen in groundwater and vegetables has exceeded the standard, and the emission of nitrous oxide has increased. Therefore, it is necessary to improve the utilization rate of chemical fertilizers and give full play to chemical fertilizers The comprehensive effect and the reduction of environmental pollution have become a common research and concern issue. The research and development of potassium humate compound fertilizer has extremely far-reaching practical significance.

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