Method for preparing slow-release and synergistic fucoidan nitrogen fertilizer by compound microbial fermentation

Abstract

The invention relates to a method for preparing a slow-release synergistic brown algae urea-ammonium mixed nitrogen fertilizer by compound microorganism fermentation. The method comprises the following steps: immersing fresh brown algae and pulp-refining, preparing a seed broth of a bacterial strain, inoculating the seed broth into the brown algae bed material for many times, realizing graded fermentation, preparing brown algae functional inocula from the fermentation product, combining the brown algae functional inocula and chemical fertilizer feedstock through a mild reaction type granulating process, and finally obtaining the slow-release synergistic brown algae urea-ammonium mixed nitrogen fertilizer rich in brown algae extract and special-efficacy composite bacterial strain. Experiments show that the composite graded fermentation technology has more excellent effects than single strain fermentation. The prepared brown algae urea-ammonium mixed nitrogen fertilizer has obviously higher fertilizer efficiency than a traditional urea-ammonium mixed nitrogen fertilizer.

Description

technical field [0001] The invention belongs to the field of agricultural fertilizers, and in particular relates to a method for preparing slow-release and synergistic fucoidan ammonium nitrogen fertilizer by compound microorganism fermentation. Background technique [0002] my country's nitrogen fertilizer production and consumption rank first in the world, but the low fertilizer utilization rate is a major bottleneck restricting my country's agricultural development. According to the data, in 2011, the amount of nitrogen fertilizer applied in my country was 24 million tons. Due to the low utilization rate of fertilizer, the loss of nitrogen fertilizer through volatilization, leaching and runoff was huge. The direct loss of fertilizer was about 10 million tons, equivalent to about 34 billion yuan. At the same time, it will bring about the decline of soil fertility, the reduction of crop quality, and serious environmental pollution. Therefore, increasing the utilization rat...

AI Technical Summary

Problems solved by technology

Polymer-coated fertilizer is a typical and internationally recognized controlled-effect fertilizer. The basic feature of this type of fertilizer is that its nutrient release is well regulated, but it has high production costs, complicated processes, and unstable long-term performance. and other issues; modified (type) fertilizers are a type of non-coated fertilizers, which change the properties of water-soluble fertilizers by adopting certain manufacturing methods, adding certain additives, or adding certain carriers, so as to control or delay fertilizer production. The purpose of nutrient release in

However, there are still problems that additives are easily decomposed and lost

Images