Method for preparing alginic acid synergistic carrier with urea transformation slowing function

The technology of alginic acid and carrier is applied in the directions of urea compound fertilizer, nitrogen fertilizer, fertilizer mixture, etc., and can solve the problems of long and complicated process flow of the preparation method.

Inactive Publication Date: 2019-03-08
INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN107236766A discloses a method for preparing a seaweed plant growth regulator by an integral biological enzymatic hydrolysis method, the method includes preparation before production, raw material pretreatment, primary enzymolysis, impurity removal of enzyma

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  • Method for preparing alginic acid synergistic carrier with urea transformation slowing function
  • Method for preparing alginic acid synergistic carrier with urea transformation slowing function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Example 1: Preparation of Alginic Acid Synergistic Carrier with Slowing Urea Conversion in the Present Invention

[0075] The steps of the preparation method are as follows:

[0076] A, preparation of alginic acid organic extractant

[0077] Add 100 parts by weight of dimethylformamide, 36 parts by weight of monoethanolamine, 5 parts by weight of aniline and 6 parts by weight of ethylene glycol to 2400 parts by weight of water at a temperature of 60°C, and stir and dissolve the obtained The solution is cooled to a temperature below 30°C to obtain the organic alginic acid extractant;

[0078] B. Preparation of alginic acid extract

[0079] Add 100 parts by weight of kelp brown algae powder raw material with a particle size of less than 2 mm to 1000 parts by weight of the alginic acid organic extractant obtained in step A, then gradually raise its temperature to 90 ° C under stirring at a speed of 180 rpm, and at this temperature kept at 1000°C for 10 h, then cooled to...

Embodiment 2

[0082] Example 2: Preparation of Alginic Acid Synergistic Carrier with Slow Urea Conversion in the Present Invention

[0083] The steps of the preparation method are as follows:

[0084] A, preparation of alginic acid organic extractant

[0085] Add 100 parts by weight of dimethylformamide, 20 parts by weight of diethanolamine, 10 parts by weight of aniline and 9 parts by weight of ethylene glycol to 2000 parts by weight of water at a temperature of 64°C, stir and dissolve the obtained The solution is cooled to a temperature below 30°C to obtain the organic alginic acid extractant;

[0086] B. Preparation of alginic acid extract

[0087] Add 100 parts by weight of macroalgae powder with a particle size of less than 2mm to 800 parts by weight of the alginic acid organic extractant obtained in step A, then gradually raise its temperature to 70°C under stirring at a speed of 100rpm, and at this temperature Keep it under high temperature for 8h, then cool to room temperature, cen...

Embodiment 3

[0090] Example 3: The present invention has the preparation of alginic acid synergistic carrier that slows down the conversion of urea

[0091] The steps of the preparation method are as follows:

[0092] A, preparation of alginic acid organic extractant

[0093] Add 100 parts by weight of dimethylformamide, 50 parts by weight of triethanolamine, 6 parts by weight of aniline and 5 parts by weight of ethylene glycol to 3000 parts by weight of water at a temperature of 70°C, and stir and dissolve the obtained The solution is cooled to a temperature below 30°C to obtain the organic alginic acid extractant;

[0094] B. Preparation of alginic acid extract

[0095] Add 100 parts by weight of Ascophyllum nodosum powder raw material with a particle size of less than 2mm to 1500 parts by weight of the alginic acid organic extractant obtained in step A, then gradually raise its temperature to 80°C under stirring at a speed of 200rpm, and at this The temperature was maintained for 12 ...

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Abstract

The invention relates to a method for preparing an alginic acid synergistic carrier with a urea transformation slowing function. The method for preparing the alginic acid synergistic carrier with theurea transformation slowing function comprises the steps of alginic acid organic extracting agent preparation, alginic acid extracting liquor preparation, extracting synergistic carrier preparation and the like. Through combination of the alginic acid synergistic carrier and urea, the decomposition, releasing and transformation speed of the urea can be obviously reduced; compared with the urea residual rate of the commercial urea, the urea residual rate of the alginic acid synergistic carrier is increased by 90%; and moreover, the sustained release performance of the urea can be enhanced by affecting fertilizer sphere process, such as pH value of urea transformation; and compared with the commercial urea, the alginic acid synergistic carrier has the advantage that the soil pH value withinthe fertilizer sphere of 1 cm is reduced by 0.3-1.1 units. Compared with the fresh weight and vitality of a contrast, the fresh weight and vitality of a wheat root system treated by the alginic acid synergistic carrier are correspondingly increased by 54.9% and 36.3% on average; and the fresh weight and vitality of a corn root system are correspondingly increased by 38.5% and 26.7%.

Description

【Technical field】 [0001] The invention belongs to the technical field of fertilizer production. More specifically, the present invention relates to a preparation method of an alginic acid synergistic carrier capable of slowing down the conversion of urea. 【Background technique】 [0002] Urea is the most important nitrogen fertilizer variety in my country, but because of its high activity and easy conversion loss, the utilization rate in the current season is only 30% to 35%, causing huge economic losses and serious environmental risks, such as ammonia in PM 2.5 The mass concentration in the air accounts for about 30%, and some heavily polluted weather exceeds 60%. Slowing down the decomposition rate of urea and reducing soil urease activity are the main ways to reduce its loss. Alginic acid is rich in functional groups such as quinone group and ketone group, which can inhibit the activity of soil urease to a certain extent, thereby reducing the loss of urea nitrogen fertili...

Claims

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Application Information

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IPC IPC(8): C05G3/08C05C9/00C05G3/90
CPCC05C9/00C05G3/90
Inventor 李燕婷袁亮赵秉强林治安张水勤王薇
Owner INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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