Macroelement water-soluble fertilizer and preparation method thereof

Abstract

The invention provides a macroelement water-soluble fertilizer and a preparation method thereof. The fertilizer is prepared from the following raw materials in parts by weight: 17-23 parts of phosphoric acid, 17-23 parts of urea, 38-44 parts of potassium nitrate, 6-10 parts of calcium superphosphate, 4-6 parts of magnesium citrate, 0.8- 1.2 parts of borax, 1-2 parts of ferrous sulfate, 0.8-1.2 parts of ammonium molybdate, 0.6 -1 part of zinc sulfate, 1-1.4 parts of copper chloride and 0.4-0.6 parts of manganese chloride. The macroelement water-soluble fertilizer can be prepared from phosphoricacid and urea as raw materials without additional chelating agents and complexing agents, has few water insolubles and good water solubility, can be used for irrigation, drip irrigation and root watering, and has effects of promoting root strengthening and improving crop quality; besides, the prepared macroelement water-soluble fertilizer not only contains the macroelements of nitrogen, phosphorus and potassium, but also contains medium elements of calcium and magnesium and trace elements of zinc, iron, copper, manganese, molybdenum and boron, thereby having complete nutrients.

Description

technical field [0001] The invention relates to the technical field of microbial fertilizers, in particular to a water-soluble fertilizer of macroelements and a preparation method thereof. Background technique [0002] Water-soluble fertilizers are liquid or solid fertilizers that can be quickly dissolved or diluted by water for fertigation, page fertilization, soilless cultivation, soaking seeds, dipping roots, etc. Compared with ordinary compound fertilizers, water-soluble fertilizers have the advantages of quick absorption and quick effect, high fertilizer efficiency utilization, and can be applied to the integration of water and fertilizer. In recent years, my country's water-soluble fertilizers have developed rapidly, and gradually formed a variety of types of fertilizers such as large-scale element water-soluble fertilizers, trace element water-soluble fertilizers, amino acid-containing water-soluble fertilizers, and humic acid-containing water-soluble fertilizers. ...

AI Technical Summary

Problems solved by technology

However, most of the existing water-soluble fertilizers with a large number of elements use phosphate (potassium monohydrogen phosphate, potassium dihydrogen phosphate) as the phosphorus source, and the phosphate ion is very easy to precipitate with the added calcium and magnesium ions, which not only reduces the calcium, magnesium, The effectiveness of zinc, iron, copper, manganese, molybdenum and phosphorus elements is easy to make the water-insoluble content of the product exceed the standard, so it is necessary to add complexing and chelating agents such as EDTA, citric acid, humic acid, etc., which increases the cost of fertilizers

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