Humic acid-containing compound microbial fertilizer and preparation method

Abstract

The invention discloses humic acid-containing compound microbial fertilizer and a preparation method. The humic acid-containing compound microbial fertilizer is characterized in that in terms of 100 parts by mass of raw materials, the fertilizer is prepared from the raw materials in parts by mass as follows: 10-30 parts of ammonium nitrate, 5-15 parts of monoammonium phosphate, 5-15 parts of potassium nitrate, 1-3 parts of zinc nitrate, 0-2 parts of boric acid, 37-50 parts of humic acid, 0.4-4 parts of microbial powder and 2-10 parts of a protective agent, and the addition amount of the boricacid is not 0. The preparation method comprises steps as follows: a required microbial agent is inoculated and is subjected to three-level fermentation, and a microbial solution is obtained; vermiculite powder in 300-500 meshes is used as an adsorbent and is added to the microbial solution product, spray-drying is performed, and the microbial powder is obtained; the ammonium nitrate, the monoammonium phosphate, the potassium nitrate, the zinc nitrate and the boric acid are mixed in proportion, then the humic acid, the protective agent and the microbial powder are added, and the humic acid-containing compound microbial fertilizer is obtained after even mixing. The fertilizer is reasonably prepared, is complete in type and rich in nutrition, can provide inorganic nutrients and organic substances which are required by growth of crops, can resist soil-borne diseases, can improve disease resistance of the crops and can promote plant growth.

Description

technical field [0001] The invention relates to the field of agricultural biological fertilizers, in particular to a compound microbial fertilizer containing humic acid and a preparation method thereof. Background technique [0002] Nowadays, the use of chemical fertilizers in our country is increasing year by year, and the utilization rate and production increase effect of chemical fertilizers are constantly declining. Water and environment pollution. Since 2015, the state has clearly stated that it is necessary to vigorously promote microbial fertilizers and implement the action of "replacing inorganic fertilizers with organic fertilizers". [0003] Humic acid is a kind of organic substance with high biological activity. It has obvious effects in improving soil, promoting the effectiveness of soil nutrients, and improving fertilizer utilization rate. When microbial agents are used for root irrigation of crops, they can also directly or indirectly improve soil. Microecolo...

AI Technical Summary

Problems solved by technology

But at present, there is no compound microbial fertilizer containing humic acid on the market. The reason should be that the characteristic of humic acid exists stably in alkaline environment, while microorganisms like to survive in neutral and acidic environment.

[0004] At the same time, microbial fertilizers generally have a short shelf life, a large number of microorganisms are easy to die, and there is no effective protection material at present.

Images