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Preparation method of alginic acid synergistic carrier for urea, applicable to topdressing to corn

The technology of alginic acid and carrier is applied in the field of preparation of alginic acid synergistic carrier for urea for corn topdressing, and can solve problems such as unseen and the like

Inactive Publication Date: 2019-02-26
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 relevant materials related to the alginic acid synergistic carrier for urea suitable for corn topdressing

Method used

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  • Preparation method of alginic acid synergistic carrier for urea, applicable to topdressing to corn
  • Preparation method of alginic acid synergistic carrier for urea, applicable to topdressing to corn
  • Preparation method of alginic acid synergistic carrier for urea, applicable to topdressing to corn

Examples

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Effect test

Embodiment 1

[0081] Example 1: Preparation of urea suitable for corn topdressing with alginic acid synergistic carrier

[0082] The implementation steps of this embodiment are as follows:

[0083] A, preparation of alginic acid extractant

[0084] Add 30 parts by weight of monoethanolamine, 8 parts by weight of dimethylformamide and 8 parts by weight of ethylene glycol to 2000 parts by weight of water at a temperature of 60°C, stir and dissolve at a speed of 60 rpm, and cool the obtained solution to a temperature of 30°C. Below ℃, the described alginic acid extractant is obtained;

[0085] B. Preparation of alginic acid extract

[0086] Add 100 parts by weight of wild kelp brown algae powder raw material with a particle size of less than 2mm to 1200 parts by weight of the alginic acid extractant obtained in step A, then gradually increase its temperature to 80 ° C under stirring at a speed of 140 rpm, and at this temperature kept at 100°C for 6 hours, then cooled to room temperature, ce...

Embodiment 2

[0091] Example 2: Preparation of urea suitable for corn topdressing with alginic acid synergistic carrier

[0092] The implementation steps of this embodiment are as follows:

[0093] A, preparation of alginic acid extractant

[0094] Add 20 parts by weight of diethanolamine, 5 parts by weight of dimethylformamide and 5 parts by weight of ethylene glycol to 1400 parts by weight of water at a temperature of 64°C, stir and dissolve at a speed of 100 rpm, and cool the obtained solution to a temperature of 30 Below ℃, the described alginic acid extractant is obtained;

[0095] B. Preparation of alginic acid extract

[0096] 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 extractant obtained in step A, then gradually raise its temperature to 80°C under stirring at a speed of 200rpm, and at this temperature Keep it under high temperature for 12h, then cool to room temperature, cen...

Embodiment 3

[0101] Example 3: Preparation of urea suitable for corn topdressing with alginic acid synergistic carrier

[0102] The implementation steps of this embodiment are as follows:

[0103] A, preparation of alginic acid extractant

[0104] Add 40 parts by weight of N-methyldiethanolamine, 10 parts by weight of dimethylformamide and 10 parts by weight of ethylene glycol to 1000 parts by weight of water at a temperature of 67°C, stir and dissolve at a speed of 180 rpm, and obtain a solution cooling to a temperature below 30°C to obtain the alginic acid extractant;

[0105] B. Preparation of alginic acid extract

[0106] 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 extractant obtained in step A, then gradually increase its temperature to 70°C under stirring at a speed of 100rpm, and at this temperature Keep for 8 hours, then cool to room temperature, centrifuge for 10 minutes at a rotational speed of 2...

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Abstract

The invention relates to a preparation method of an alginic acid synergistic carrier for urea, applicable to topdressing to maize. The method comprises the following steps: preparing an alginic acid extractant by taking hydramine and dimethylformamide as raw materials, further grafting benzene carboxylic acid containing aromatic ring and extracted alginic acid, combining maize sensitive chelate zinc, and preparing the alginic acid synergistic carrier with richer acid functional group variety and content. After the alginic acid synergistic carrier is combined with urea, 0.5 to 1.3 units of urea1cm fertisphere soil pH can be obviously reduced, and compared with commercial urea treatment, averagely the soil urease activity is reduced by 26.5 percent, so that decomposition and conversion speed of alginic acid urea is obviously reduced; compared with commercial urea, ammonia volatile nitrogen is reduced by approximately 60 percent. Compared with comparison, the maize root fresh weight andvitality are improved by 22.6 percent and 26.9 percent respectively, and compared with commercial urea, the yield of maize treated through alginic acid urea is improved by 10.1 percent.

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 an alginic acid synergistic carrier suitable for topdressing corn. 【Background technique】 [0002] Urea is the most important nitrogen fertilizer variety in my country. However, due to 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. Ammonia is present in PM2.5 The mass concentration accounts for about 30%, and some heavily polluted weather exceeds 60%. Summer maize topdressing season has high temperature, high urease activity, fast conversion of urea, and large loss of ammonia volatilization. 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,...

Claims

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Application Information

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IPC IPC(8): C05G3/00
CPCC05B17/00C05G3/00C05D9/02C05F11/00
Inventor 袁亮赵秉强李燕婷林治安张水勤王薇
Owner INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI