Vegetable nursery coated base fertilizer and preparation method thereof

Abstract

The invention discloses a vegetable nursery coated base fertilizer and a preparation method thereof. The vegetable nursery coated base fertilizer is prepared from the following raw materials (in parts) by weight: a 4-6wt% HCl solution, zinc oxide powder, weathered coal, sweet potato powder, crab shells, humic acid powder, ferrous sulfate, composted chicken manure, shells, wheat straw powder, ammonium bicarbonate, ammonium molybdate, potassium chloride, cellulose homogenate and water. The vegetable nursery coated base fertilizer mainly comprises rich organic materials and trace chemical components, and the trace chemical components are beneficial to decomposition of organic matters in soil and can provide nutrition which cannot be provided by the organic materials; due to complexing of the humic acid, inorganic components can be relatively easily absorbed; as the surface is coated by cellulose, rapid splitting of granules can be effectively retarded, the action effect can be prolonged, and the content of the organic matters in a nursery can be increased.

Description

technical field [0001] The invention belongs to the technical field of fertilizers, and in particular relates to a vegetable nursery coating base fertilizer and a preparation method thereof. Background technique [0002] The usual fertilizer coating has the initial sulfur-coated urea technology, and then the Japanese-style thermosetting resin coating technology. The basis of these resin materials is mainly polyolefin, which is formed by grafting and copolymerizing with some organic polymers. The high polymer is mixed with a certain amount of inorganic mineral stone powder to make a coating material. The inorganic mineral stone powder used includes silicon, sulfur, gypsum, phosphate, zeolite powder, diatomaceous earth, bentonite, etc. The United States first successfully developed sulfur Coated urea, the film layer is composed of sulfur-coated layer, sealing layer and powder coating layer, which occupies an important position in today's sulfur-coated slow-release powder; [...

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Problems solved by technology

[0003] But the disadvantages are obvious: although the stone powder coating fertilizer can improve the soil mineral quality, it needs the addition of chemical organic matter to bond, mainly the addition of resin, but the preparation of slow-release fertilizer, the resin binder used in the coating varies. The proportion, addition amount and selection of types are problems. Improper control will affect the timely supply of fertilizers. Slightly improper control will cause the coating of stone powder to be easily cracked by moisture, sandy soil, and reduce the relative proportion of humus in the soil. Water and soil erosion is very unfavorable for long-term planning; on the other hand, the coating material of stone powder is used, and the stone powder itself has a certain thickness, which seriously affects the real effective content of the coated fertilizer. If the content of added nutrients is increased, the fertilizer will inevitably increase. Particle size, very unfavorable for dissolution and fertilizer balance issues