Method for preparing liquid seaweed fertilizer

A technology of liquid fertilizer and seaweed extract, which is applied in the direction of liquid fertilizer, organic fertilizer, fertilizer mixture, etc., can solve the problems of high cost, uneasy control of process conditions, and long time consumption, so as to improve cold resistance and drought resistance, shorten alkali extraction time, The effect of promoting and regulating plant growth

Inactive Publication Date: 2015-03-25
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Enzyme (microbial) fermentation takes a long time, is co

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 3kg of dried kelp was soaked and swollen, crushed to 60 mesh, added 45kg of water, soaked and swelled in hot water at 70°C for 3.5 hours. At normal pressure, temperature is 75°C, pH is 5.5, and ultrasonic frequency is 26KHz, ultrasonic extraction is carried out for 1 hour. After the extraction is completed, the solid and liquid are separated; move the solid seaweed to the reaction kettle, add 28.8 kg of water, and add 0.4 kg of potassium hydroxide , under normal pressure and at a temperature of 90°C, extract for 1.5 hours, after the reaction is complete, add phosphoric acid to neutralize, adjust the pH to 7, and separate the solid and liquid; combine the filtrates to obtain a seaweed extract, add 5.2kg of urea, 4.3kg of a Ammonium, 5.6kg potassium nitrate, adjust pH to be 5.5, obtain seaweed liquid fertilizer.

Embodiment 2

[0032]Take fresh kelp and crush it to 30 meshes, take 5 kg of crushed kelp, add 25 kg of water, conduct ultrasonic extraction for 2 hours under the conditions of normal pressure, temperature 60°C, pH 9, and ultrasonic frequency 32KHz. After extraction, solid-liquid separation; Move the solid seaweed to the reaction kettle, add 6.8kg of water, add 0.51kg of sodium hydroxide, under normal pressure, the temperature is 70°C, extract for 1 hour, after the reaction is completed, add hydrochloric acid to neutralize, adjust the pH to 8, and separate the solid and liquid Combine the filtrates to obtain the seaweed extract, add 6kg of monoammonium, 3kg of potassium nitrate, and 1.5kg of sodium humate to adjust the pH to 9 to obtain the seaweed liquid fertilizer.

Embodiment 3

[0034] Take 1 kg of dry Ascophyllum nodosum powder, swell and crush it to 100 mesh, add 13 kg of water, soak and swell at room temperature for 15 hours. At normal pressure, temperature is 50°C, pH is 6, and ultrasonic frequency is 23KHz, ultrasonic extraction is carried out for 3 hours. After the extraction is completed, the solid and liquid are separated; move the solid seaweed to the reaction kettle, add 17.4 kg of water, and add 0.1 kg of sodium carbonate. Under normal pressure and at a temperature of 80°C, extract for 3 hours. After the reaction is completed, add sulfuric acid to neutralize, adjust the pH to 6, and separate the solid and liquid; combine the filtrates to obtain the seaweed extract, add 18.4 kg of water, and then add 3.5 kg of urea. 2.9kg monoammonium, 3.8kg potassium sulfate, adjust pH to be 7, obtain seaweed liquid fertilizer.

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Abstract

The invention discloses a method for preparing a liquid seaweed fertilizer. The seaweeds serve as raw materials, and the method sequentially comprises the following steps: pulping and crushing fresh seaweeds or soaking and swelling dried seaweeds for pulping and crushing, performing ultrasonic extraction, performing solid-liquid separation, performing alkaline extraction on solid seaweeds, compounding the seaweed extraction solution and common fertilizers, thereby obtaining the liquid seaweed fertilizer. According to the method disclosed by the invention, the extraction efficiency of active ingredients in the seaweeds can be obviously improved, and compared with a traditional chemical extraction method, the method disclosed by the invention has the advantages that because a mild method is adopted, for example, ultrasonic extraction and relatively low temperature and dilute acid/dilute alkali assisted ultrasonic extraction are adopted, and the alkali extraction time is obviously shortened. According to the process technology, the activity of the active ingredient can be obviously preserved in the extraction process, so that high-activity seaweed extract and products thereof are obtained.

Description

technical field [0001] The present invention relates to a kind of preparation method of fertilizer, specifically a kind of preparation method of seaweed liquid fertilizer, more specifically, relates to more than one kind of seaweed from kelp, macroalgae, sargassum, ascophyllum nodosum, enteromorpha etc. Extract seaweed polysaccharides, phenolic polymers, mannitol, betaine, plant growth regulators (cytokinin, gibberellin, auxin, and abscisic acid, etc.) and nitrogen, phosphorus, potassium, and trace elements (iron, boron, molybdenum, iodine, etc.), and use these active ingredients to compound to form natural organic fertilizers, which are used to promote plant growth, increase production and income, and improve the quality of agricultural products. technical background [0002] The amount of chemical fertilizer used per unit area in my country ranks first in the world. The amount of chemical fertilizer used is three times the world's average level and six times that of develo...

Claims

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Application Information

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IPC IPC(8): C05G3/00
CPCC05F11/00C05G5/23
Inventor 冯大伟王其选宋仁程衣悦涛刘仙亭翟耀东孙玲丽张灵芝王永丽
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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