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Biodegradable microsphere coating fertilizer

A biodegradable and coated fertilizer technology, applied in the direction of layered/coated fertilizers, nitrogen fertilizers, phosphate fertilizers, etc., can solve the problems of large differences in fertilizer release rates, difficult degradation of coating materials, degradation rates, and degradation capabilities that have not reached the expected level, etc. problems, to avoid environmental pollution and soil agglomeration, suitable for large-scale production, simple and feasible preparation process

Inactive Publication Date: 2019-01-04
许传高
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some slow-release fertilizers have appeared on the market at present, for example Chinese patent CN103044135A has provided peanut-specific controlled-release fertilizers, wherein the coating material is weathered coal, and the binder is a combination of bisphenol A and triethylenetetramine; the fertilizer can be mentioned Some slow release effect, but the fertilizer release rate varies greatly in different environments
A special controlled-release fertilizer for apples provided by Chinese patent CN102951968A, the coating material is thermoplastic resin, and the slow-release rate is controlled in an orderly manner, but there is a problem that the coating material is difficult to degrade or the degradation rate is slow
It has good biocompatibility and bioabsorbability; the density is 1.26g / cm3, the melting point is 114°C, and the crystallinity is between 30-45% according to the molecular weight and molecular weight distribution; but its degradation ability has not yet reached expected level

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A biodegradable microsphere-coated fertilizer, which is prepared according to the following steps:

[0025] Add polybutylene succinate to chloroform, the ratio of polybutylene succinate and chloroform is 1g: 10ml, stir until dissolved, then add one-tenth of polybutylene succinate Starch ether in parts by weight, stirred at 200 rpm for 10 minutes, then added ethanol with the same volume as chloroform, allowed to stand for 30 minutes, collected the precipitate, put it into a freeze dryer, and dried for 12 hours to obtain a microsphere carrier;

[0026] Add urea, potassium nitrate, superphosphate and water into the stirring tank according to the mass ratio of 3:3:1:10, stir at 300rpm for 30min, then enter the reaction tank, and heat to 70°C at a heating rate of 10°C / min. Insulate and react for 10 minutes, then cool to room temperature, and then stand still for 6 hours to obtain liquid fertilizer;

[0027] Paenibacillus polymyxa, Trichoderma harzianum and Bacillus megateri...

Embodiment 2

[0032] A biodegradable microsphere-coated fertilizer, which is prepared according to the following steps:

[0033] Add polybutylene succinate to chloroform, the ratio of polybutylene succinate and chloroform is 1g: 10ml, stir until dissolved, then add one-tenth of polybutylene succinate Starch ether in parts by weight, stirred at 200 rpm for 10 minutes, then added ethanol with the same volume as chloroform, allowed to stand for 30 minutes, collected the precipitate, put it into a freeze dryer, and dried for 12 hours to obtain a microsphere carrier;

[0034] Add urea, potassium nitrate, superphosphate and water into the stirring tank at a mass ratio of 5:5:2:20, stir at 300rpm for 30min, then enter the reaction tank, and heat to 70°C at a heating rate of 10°C / min. Insulate and react for 10 minutes, then cool to room temperature, and then stand still for 6 hours to obtain liquid fertilizer;

[0035] Paenibacillus polymyxa, Trichoderma harzianum and Bacillus megaterium were cult...

Embodiment 3

[0039] 1. Urea release time test:

[0040] The test group is Example 1; the control group: chitosan microsphere carrier, and the rest are the same as Example 1. as attached figure 1 As shown, the control group released all urea within 10 days, while the urea release rate of the test group was stable and orderly, which was basically synchronized with the crop nutrient absorption, avoiding the defects that most of the slow-release fertilizers were released too quickly and lost a lot in the early stage. The effect is obviously better than the chitosan microsphere carrier commonly used in the market.

[0041] 2. Microsphere carrier degradation time test:

[0042] The test group is the embodiment 1; the control group 1: no compound bacteria solution is added, and the rest are the same as the embodiment 1. as attached figure 2 As shown, the difference in the degradation rate between the test group and the control group in the early stage is not large, which may be due to the fa...

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Abstract

The invention belongs to the field of fertilizer preparation, and discloses a biodegradable microsphere coating fertilizer. The biodegradable microsphere coating fertilizer is prepared according to the following steps that step (1) a microsphere carrier is prepared; step (2) a liquid fertilizer is prepared; step (3) a composite bacteria liquid is prepared; step (4) a fertilizer microsphere is prepared; step (5) the microsphere coating fertilizer is prepared. The biodegradable microsphere coating fertilizer has the advantages that the fertilizer efficiency is durable, the preparation technologyis simple and feasible, and the microsphere coating fertilizer is suitable for scale production.

Description

technical field [0001] The invention belongs to the technical field of fertilizer preparation, and in particular relates to a biodegradable microsphere-coated fertilizer. Background technique [0002] With the development of modern agricultural production, people are looking forward to the emergence of fertilizers with long-lasting fertilizer effects and less loss in the field of fertilizers, which can improve the soil, increase the yield and quality of crops, increase production efficiency, reduce production or improve labor conditions, and protect the natural environment. Due to the excessive use of soil, most of the soil currently has many problems, such as poor nutrient absorption capacity of crops, inactive soil, poor water and fertilizer retention capacity, serious soil salinization caused by successive years of sedimentation, serious soil-borne diseases, and trace Elements are not easily absorbed, and the quality of crops decreases. In addition, because people blindl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/02C05G3/08C05G3/60C05G3/90
CPCC05B1/02C05G3/60C05G3/90C05G5/12C05G5/30C05G5/45C05C5/02C05C9/00C05F11/08
Inventor 赵兰坤解升坤许传高徐勤富
Owner 许传高
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