Slow-release microorganism compound fertilizer and preparation method thereof

Abstract

The invention discloses a slow-release microorganism compound fertilizer, which is granular and comprises an A-type microorganism bacterial inner layer, an organic-inorganic compound fertilizer middle layer and a B-type microorganism bacterial outer layer, wherein the components of the A-type microorganism bacterial inner layer comprise an inorganic porous carrier, decomposition bacteria, yeast and lactic acid bacteria, the decomposition bacteria, the yeast and the lactic acid bacteria are loaded inside the inorganic porous carrier, the components of the organic-inorganic compound fertilizer middle layer comprises a gel carrier A, an organic fertilizer component loaded in the gel carrier A, and an inorganic fertilizer component loaded in the gel carrier A, the components of the B-type microorganism bacterial outer layer comprise a gel carrier B, nitrogen-fixing bacteria, phosphate-dissolving bacteria and potassium-dissolving bacteria, and the nitrogen-fixing bacteria, the phosphate-dissolving bacteria and the potassium-dissolving bacteria are loaded in the gel carrier B. The invention relates to the field of agricultural fertilizers. According to the present invention, the prepared slow-release microorganism compound fertilizer has the slow release function, the survival rate of the microorganisms in the fertilizer is high, the types of the microorganisms are more, and the nutrients of the fertilizer are not easily lost.

Description

technical field [0001] The invention relates to the field of agricultural fertilizers, in particular to a slow-release microbial compound fertilizer and a preparation method thereof. Background technique [0002] Fertilizer is the food of plants and the material basis to ensure agricultural production increase. Among the three elements of agricultural production increase such as seeds, fertilizers and pesticides, fertilizer plays a role in 30-50%. At present, the seasonal utilization rate of my country's chemical fertilizers is about 30-35% for nitrogen, about 10-20% for phosphorus, and about 35-50% for potassium, which are lower than the world average. [0003] However, the excessive use of chemical fertilizers will lead to a series of problems such as deterioration of soil structure, nutrient imbalance, acidification, salinization and pollution, and decline of biodiversity. With the rise of high-efficiency agriculture and the diversification of planting structures, the de...

AI Technical Summary

Problems solved by technology

[0007] When the content of some substances in the fertilizer is too high, it has an inhibitory effect on microorganisms, but reducing the content of this substance will cause nutrient deficiency, so the survival rate of microorganisms is very low after the combination of the two, or the fertilizer fertility is insufficient; at the same time , the environment during the preparation of fertilizers is not conducive to the survival of microorganisms, resulting in a low survival rate of microorganisms

[0008] Mixing different microorganisms together will easily cause competition among different microorganisms, and the number of microorganisms with weak competitiveness will gradually decrease, resulting in a single type of microorganisms in the fertilizer

[0009] Generally, organic fertilizers are usually made by fully fermenting organic wastes first, and then using the fermented products to make fertilizers. The advantage of this is that organic wastes can be degraded into organic substances with smaller molecular weights, which is conducive to the absorption of crops, but The disadvantage is that organic matter with a small molecular weight is easy to lose, resulting in insufficient soil fertility