A kind of preparation method of self slow-release seaweed fertilizer

A seaweed fertilizer and slow-release technology, applied in the direction of potassium fertilizer, nitrogen fertilizer, phosphate fertilizer, etc., can solve the problems of high cost, large waste of fertilizer raw materials, inability to realize quick-acting and long-term needs of crop nutrients, etc., to reduce water evaporation and prevent soil The effect of hardening and reducing the labor intensity of fertilization

Active Publication Date: 2021-04-30
INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a self-sustained-release seaweed fertilizer preparation method, which utilizes the polysaccharide contained in the seaweed itself to cross-link with macromolecular substances to form a macromolecular slow-release product, so as to solve the problem of large waste of fertilizer raw materials, high cost, and inability to realize crop protection. Quick-acting and long-acting nutrient requirements

Method used

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  • A kind of preparation method of self slow-release seaweed fertilizer

Examples

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Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1 prepares self slow release and adds potassium seaweed fertilizer

[0022] Specifically, the following steps are included:

[0023] (1) Raw material pretreatment: soak 100 kg of seaweed in water and wash it several times;

[0024] (2) Adjust the water content of the seaweed raw material after pretreatment to 40-50%, add acetic acid to adjust the pH to 4-7, add 3% cellulase, 1% pectinase, 2% non-algae according to the amount of enzyme / algae mass ratio Amylopolysaccharase, 1% papain, 1% helicase and temperature control 25 ~ 45 ℃ use multi-stage series enzymatic hydrolysis for 10 ~ 24h, the level of multi-stage series enzymatic hydrolysis is set to 6 levels, the temperature range of each level of enzymatic hydrolysis It is controlled between 25-45°C, the pH is controlled between 4-7, and the temperature gradually increases from the first level to the next level, while the pH value gradually decreases. After enzymatic hydrolysis, centrifuge;

[0025] (3) sque...

Embodiment 2

[0028] Embodiment 2 prepares self slow release and adds selenium seaweed fertilizer

[0029] Specifically, the following steps are included:

[0030] (1) Raw material pretreatment: take 200 kilograms of seaweed scraps and soak them in water and wash them several times;

[0031] (2) Adjust the water content of the seaweed raw material after pretreatment to 40-50%, add acetic acid to adjust the pH to 4-7, add 5% cellulase, 1% pectinase, 3% non-algae according to the amount of enzyme / algae mass ratio Amylopolysaccharase, 2% papain, 2% helicase and temperature control 25 ~ 45 ℃ use multi-stage series enzymatic hydrolysis for 10 ~ 24h, the level of multi-stage series enzymatic hydrolysis is set to 5 levels, the temperature range of each level of enzymatic hydrolysis It is controlled between 25-45°C, the pH is controlled between 4-7, and the temperature gradually increases from the first level to the next level, while the pH value gradually decreases. After enzymatic hydrolysis, c...

Embodiment 3

[0035] Example 3 Self-slow-release seaweed fertilizer water retention effect verification

[0036] Take the self-slow-release potassium seaweed fertilizer and the self-slow-release seaweed fertilizer with selenium added in Examples 1 and 2, and measure their effects on soil water retention. The soil without fertilizer particles has a water retention rate of about 40%, and after drying for 15 days in the natural state, almost loses all water; while the soil with 1%, 2% and 3% fertilizer particles respectively has a water retention rate of 68%. %, 90% and 94%, after drying for 15 days in the natural state, the water retention rate is still 34%, 49 and 68%. It can be seen that the self-slow-release seaweed fertilizer not only has a good water absorption capacity, but also has a good water retention capacity after being added to the soil. This characteristic of fertilizer granules is mainly due to the self-trehalose and its macromolecular cross-linked products in the seaweed fert...

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Abstract

The invention discloses a method for preparing self-slow-release seaweed fertilizer, which comprises the following steps: raw material pretreatment; enzymatic hydrolysis and centrifugation; preparation of modified seaweed gel compound solution; granulation; and coating. The product of the present invention uses polysaccharides and macromolecular substances of seaweed itself to carry out cross-linked slow-release components and enzymatic hydrolysis to facilitate crop absorption. Root nutrient absorption can significantly increase the utilization rate of chemical fertilizers and reduce environmental pollution; it can reduce the amount of chemical fertilizers and pesticides used and the frequency of fertilization, reduce the labor intensity of fertilization, save labor, and improve the soil fertility level of fertilized soil. At the same time, the water absorption and water retention experiments of the self-slow-release seaweed fertilizer in the soil show that the application of the self-slow-release seaweed fertilizer can increase the water holding rate and water retention rate of the soil, reduce the evaporation of water, prolong the irrigation cycle of the soil, and improve the water use efficiency. It also prevents soil compaction.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of seaweed active ingredients, in particular to a preparation method for self-slow-release seaweed fertilizer. Background technique [0002] Seaweed is rich in reserves and contains a variety of active ingredients, which have important applications in food, medicine, daily chemicals, fertilizers, feed and other fields. Relying on the abundant large seaweed resources, my country has established a large-scale large seaweed production and processing industry, forming a large seaweed industrial system with brown algae and red algae as the main body, involving food, feed, medicine, chemical industry and other fields, becoming a marine industry. important part of the economy. At present, the processing of large seaweed in my country mainly involves the extraction and processing of seaweed gums such as alginate, agar gum, and carrageenan. At the same time, the extraction of carotene, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/40C05G3/80C05G5/12C05G5/30
CPCC05B7/00C05G3/80C05G5/12C05G5/30C05C3/00C05C9/00C05C11/00C05D1/00C05D1/02C05D3/00C05D9/02C05F11/00C05F11/02C05G3/00
Inventor 赵鲁李贵春杜章留蒋增唐淬董悦林涵宁张秀成
Owner INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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