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Preparation method of alginic acid synergistic carrier-containing granular urea suitable for winter wheat topdressing

A technology of granular urea and alginic acid, applied in urea compound fertilizer, nitrogen fertilizer, fertilization device and other directions, can solve the problems that have not been seen.

Inactive Publication Date: 2019-01-11
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

At present, there are no patent applications and related materials for granular urea containing alginic acid synergistic carrier suitable for winter wheat topdressing

Method used

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  • Preparation method of alginic acid synergistic carrier-containing granular urea suitable for winter wheat topdressing
  • Preparation method of alginic acid synergistic carrier-containing granular urea suitable for winter wheat topdressing

Examples

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Effect test

Embodiment 1

[0072] Example 1: Preparation method of granular urea containing alginic acid synergistic carrier suitable for winter wheat topdressing The implementation steps of this example are as follows:

[0073] A, preparation of alginic acid extractant

[0074] Add 4 parts by weight of potassium salicylate and 3.0 parts by weight of dimethylformamide to 200 parts by weight of water at a temperature of 64°C, stir and dissolve at a speed of 180 rpm, and cool the obtained solution to a temperature below 35°C to obtain the obtained The alginic acid extractant described above;

[0075] B. Preparation of alginic acid extract

[0076] 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 10 h at high temperature, then cooled to room temperature, ...

Embodiment 2

[0083]Example 2: Preparation method of granular urea containing alginic acid synergistic carrier suitable for winter wheat topdressing

[0084] The implementation steps of this embodiment are as follows:

[0085] A, preparation of alginic acid extractant

[0086] Add 5 parts by weight of potassium salicylate and 2.4 parts by weight of dimethylformamide to 140 parts by weight of water at a temperature of 70°C, stir and dissolve at a speed of 60 rpm, and cool the obtained solution to a temperature below 35°C to obtain the obtained The alginic acid extractant described above;

[0087] B. Preparation of alginic acid extract

[0088] 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 kept at 100°C for 8h, then cooled to room temperature, centrifuged at 3000rpm fo...

Embodiment 3

[0095] Example 3: Preparation method of granular urea containing alginic acid synergistic carrier suitable for winter wheat topdressing The implementation steps of this example are as follows:

[0096] A, preparation of alginic acid extractant

[0097] Add 2 parts by weight of potassium salicylate and 1.6 parts by weight of dimethylformamide to 170 parts by weight of water at a temperature of 60°C, stir and dissolve at a speed of 120 rpm, and cool the obtained solution to a temperature below 30°C to obtain the obtained The alginic acid extractant described above;

[0098] B. Preparation of alginic acid extract

[0099] 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 hours, then cooled to room temperature, ce...

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Abstract

The invention relates to a preparation method of alginic acid synergistic carrier-containing granular urea suitable for winter wheat topdressing. The preparation method comprises preparation of an alginic acid extractant, preparation of alginic acid extract, preparation of an alginic acid synergistic carrier and preparation of granular urea containing an alginic acid synergistic carrier. The granular urea containing the alginic acid synergistic carrier can significantly increase the urease activity of the granular urea by 23.9% in soil in a fertilization range of 1cm. The urea nitrogen contentin the fertilization range of 1cm is 14.1% lower than that of the commercially available urea so that the decomposition and conversion rate of alginic acid urea is significantly accelerated. Comparedwith commercially available urea, the granular urea containing the alginic acid synergistic carrier can averagely increase the wheat yield by 9% or more and the nitrogen fertilizer utilization rate by 8%. The alginic acid urea can increase a wheat yield by 10.2% and a nitrogen fertilizer utilization rate by 7.6%.

Description

【Technical field】 [0001] The invention belongs to the technical field of fertilizer production. More specifically, the present invention relates to a method for preparing granular urea containing alginic acid synergistic carrier suitable for winter wheat topdressing. 【Background technique】 [0002] Urea is the most important nitrogen fertilizer variety in my country, and improving its utilization rate is crucial to increasing yield, saving resources and protecting the environment. Urea needs to be converted into ammonium nitrogen and nitrate nitrogen before it can be absorbed and utilized by crops. Topdressing winter wheat in my country is generally from mid-to-late March to early April according to the water source situation and the time of wheat turning green. The ability of the root system to absorb nutrients is poor, and the effect of topdressing with urea nitrogen fertilizer is greatly reduced. Due to the low soil microbial activity and extremely low urease activity d...

Claims

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Application Information

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