Biological compound slow-release fertilizer and preparation method thereof

Abstract

The invention discloses a biological compound slow-release fertilizer. The biological compound slow-release fertilizer is prepared from the raw materials in parts by weight: 20-40 parts of starch, 20-40 parts of beet oxidized molasses, 30-50 parts of urea, 15-25 parts of peony seed meal, 6-8 parts of diatomaceous earth, 4-6 parts of a composite microbial agent, 20-24 parts of sodium humate, 5-7 parts of chitosan, 0.5-1 part of N,N-methylenebisacrylamide, 8-12 parts of sodium alginate, 6-10 parts of modified layered silicate, 5-10 parts of organic matter, 15-25 parts of oxidized molasses starchester, 0.01-0.05 part of ammonium molybdate, 40-50 parts of bone glue, 10-14 parts of isooctyl palmitate, 15-25 parts of plant ash, 20-25 parts of food processing waste, 2-4 parts of clay additives,1-3 parts of nano carbon, 3-5 parts of water retention and controlled release fertilizers, and 70-90 parts of peanut acidic oil. The preparation of various water-soluble slow-release fertilizers can be applied, materials of a coating layer used are completely biodegradable materials, and the biological compound slow-release fertilizer can make up for the deficiency of soil and environment pollution due to non-biodegradable synthetic polymers, has no pollution to soil, and does not change a soil environment; and the biological compound slow-release fertilizer has a simple process, is convenientto operate, short in process cycle and low in energy consumption, does not generate waste, conforms to the concept of environmental protection of the atom economy, and is beneficial to industrialization popularization and application.

Description

technical field [0001] The invention relates to the technical field of chemical fertilizers, in particular to a biological compound slow-release chemical fertilizer and a preparation method thereof. Background technique [0002] Chemical fertilizers play a pivotal role in agricultural production. As a large agricultural country, my country has a high demand for chemical fertilizers in agricultural production. According to statistics, chemical fertilizers have become the largest material investment in agricultural production, accounting for about 50% of all productive expenditures. my country's fertilizer production and usage are the first in the world, of which the output accounts for about 20% of the world's fertilizer production, and the usage has accounted for 28% of the world's chemical fertilizer consumption. However, due to the nature of chemical fertilizers and the requirements for the soil environment, low fertilizer use efficiency has become a common problem in th...

AI Technical Summary

Problems solved by technology

However, the existing slow-release chemical fertilizers have the following problems: 1. Most of the film-forming materials of the coating layer are synthetic high molecular polymers, which are not easy to biodegrade

2. Directly use pure starch or various plant straw powders plus chemical adhesives to wrap, the slow-release period is short or the slow-release rate is difficult to control

3. The coating materials used are expensive, such as coupling agents such as silane, titanate or aluminate, and the high cost is not conducive to large-scale application