Functional chitosan biological slow-release fertilizer and preparation method thereof

A chitosan and slow-release fertilizer technology, applied in the field of functional chitosan bio-slow-release fertilizer, can solve the problems of fertilizer utilization rate to be improved, high price, difficult to popularize and apply, etc., and achieve remarkable nutrient slow-release effect , Process requirements are simple, the effect of reducing costs

Active Publication Date: 2014-03-12
STANLEY AGRI GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most important problem affecting the development of slow/controlled release fertilizers is the price issue. Due to the high price, they are mainly used for special crops

Method used

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  • Functional chitosan biological slow-release fertilizer and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0036] Functional chitosan biological slow-release fertilizer (N-P 2 o 5 -K 2 O: 28-6-6, slow and controlled release of nitrogen accounted for 60% of the total nitrogen) preparation method

[0037] (1) In the reaction kettle, add 15kg industrial starch and 71kg distilled water, heat up to 70°C-80°C under stirring, gelatinize and stir for 30min, then add 8kg polyvinyl alcohol, 3kg chitosan, 2kg butyraldehyde (concentration 98 %), 1kg of di-n-hexyl adipate, heated up to 90°C-95°C under stirring, and the constant temperature reaction time is 60min-90min, and an environmentally friendly and biodegradable chitosan coating material is formed.

[0038](2) Screen and weigh 365kg of large-grain urea fertilizer with a particle size of 2.2mm-4.2mm, pour it into a fluidized bed drum coating machine, preheat it to 80°C-90°C in the preheating zone, and enter the fluidized coating Area. In the fluidized coating area, the preheated large-grained urea is lifted to the top of the drum by th...

Embodiment 2

[0041] Functional chitosan biological slow-release fertilizer (N-P 2 o 5 -K 2 O: 26-12-10, slow and controlled nitrogen release accounts for 69% of the total nitrogen) preparation method

[0042] (1) In the reaction kettle, add 20kg industrial starch and 60kg distilled water, heat up to 70°C-80°C under stirring, gelatinize and stir for 30min, then add 10kg polyvinyl alcohol, 5kg chitosan, 4kg butyraldehyde (concentration 98 %), 1kg of di-n-hexyl adipate, heated up to 90°C-95°C under stirring, and the constant temperature reaction time is 60min-90min, and an environmentally friendly and biodegradable chitosan coating material is formed.

[0043] (2) Screen and weigh 390kg of large-grain urea fertilizer with a particle size of 2.2mm-4.2mm, pour it into a fluidized bed drum coating machine, preheat it to 80°C-90°C in the preheating zone, and enter the fluidized coating Area. In the fluidized coating area, the preheated large-grained urea is lifted to the top of the drum by th...

Embodiment

[0047] Embodiment: functional chitosan biological slow-release fertilizer (28-6-6, produced by Stanley Company)

[0048] The corn variety is "Denghai 618"

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Abstract

The invention discloses a functional chitosan biological slow-release fertilizer, belonging to the technical field of agricultural fertilizers. The functional chitosan biological slow-release fertilizer contains a kernel fertilizer and a biodegradable chitosan coated layer coated on the kernel fertilizer, wherein the total coating rate is 2-10 weight percent. The chitosan biological slow-release fertilizer is prepared by causing a chitosan coated agent to coat kernel fertilizer granules. The functional chitosan biological slow-release fertilizer adopts a chitosan membrane material formula that the release characteristic of fertilizer nutrient is similar to the absorption law of crops, so that the cost of the coated slow-release fertilizer is significantly reduced. The membrane layer of product resists impact and wear, the release effect of nutrient is significant, and the utilization rate of a fertilizer is high. An organic solvent is not used in the membrane material production, so that the fertilizer is non-pollution, is easily degraded in soil without residue, and can obviously improve soil. The functional chitosan biological slow-release fertilizer has an important meaning for environment and society and is worthy of being generalized.

Description

technical field [0001] The invention belongs to the technical field of agricultural fertilizers, in particular to a functional chitosan biological slow-release fertilizer. Background technique [0002] Fertilizer is the "food" of crops and plays an irreplaceable supporting role in ensuring my country's food security. my country's fertilizer utilization rate is low. Research shows that the seasonal utilization rate of nitrogen fertilizer is only 30%-35%, that of phosphorus fertilizer is 10%-20%, and that of potassium fertilizer is 30%-50%. [0003] A side effect of low fertilizer use efficiency is the adverse impact on the environment. Lost nitrogen becomes eutrophication of surface water, nitrate enrichment of groundwater, and atmospheric N 2 One of the important sources of O. How to use fertilizers efficiently to ensure food security and coordinate the agronomic effects, social benefits and environmental benefits of fertilizers is an urgent and arduous task. [0004] Ch...

Claims

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Application Information

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IPC IPC(8): C05G3/00
CPCY02P20/129
Inventor 陈大印高进华周丽解学仕李元峰
Owner STANLEY AGRI GRP CO LTD
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