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Slow-release water-retaining fertilizer and preparation method thereof

A fertilizer and slow-release technology, applied in the field of slow-release water-retaining fertilizer and its preparation, can solve the problems of grain yield increase rate not reaching the same level, decrease in yield increase effect, etc. The effect of low consumption and pollution reduction

Pending Publication Date: 2021-04-16
广东金正大生态工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to statistics, my country's per capita water resource occupancy rate is only a quarter of the world's average. At the same time, my country's fertilizer use has shown a substantial growth pattern, but the increase rate of grain production has not reached the same level.
There are many reasons for this phenomenon, and the decrease in fertilizer and water use efficiency is an important reason for the decrease in yield increase effect

Method used

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  • Slow-release water-retaining fertilizer and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0049] A slow-release water-retaining fertilizer, said slow-release water-retaining fertilizer is calculated in parts by weight and consists of the following components:

[0050] 100 parts of compound fertilizer, 15 parts of water-retaining slow-release agent, 3 parts of binder and 0.03 part of plant growth regulator.

[0051] The compound fertilizer includes nitrogen fertilizer, phosphorus fertilizer, potassium fertilizer and manure organic fertilizer.

[0052] The plant growth regulator is indole butyric acid and naphthalene acetic acid, and the mass ratio of indole butyric acid to naphthalene acetic acid is 1:0.2-0.5.

[0053] The binder is polyvinyl alcohol resin.

[0054] The water-retaining slow-release agent is modified montmorillonite nanopowder;

[0055] The preparation method of the modified montmorillonite nano powder is:

[0056] Step 1. activating the montmorillonite, pulverizing it into nanoparticles to obtain activated montmorillonite nanopowder;

[0057] St...

Embodiment 2

[0085] A slow-release water-retaining fertilizer, said slow-release water-retaining fertilizer is calculated in parts by weight and consists of the following components:

[0086] 100 parts of compound fertilizer, 10 parts of water-retaining slow-release agent, 2 parts of adhesive and 0.01 part of plant growth regulator.

[0087] The compound fertilizer includes nitrogen fertilizer, phosphorus fertilizer, potassium fertilizer and manure organic fertilizer.

[0088] The plant growth regulator is indole butyric acid.

[0089] The adhesive is acrylic resin.

[0090] The water-retaining slow-release agent is modified montmorillonite nanopowder;

[0091] The preparation method of the modified montmorillonite nano powder is:

[0092] Step 1. activating the montmorillonite, pulverizing it into nanoparticles to obtain activated montmorillonite nanopowder;

[0093] Step 2. reacting barbituric acid and 4-chloro-1-butanol in a lye environment to obtain a barbituric acid reactant;

[...

Embodiment 3

[0121] A slow-release water-retaining fertilizer, said slow-release water-retaining fertilizer is calculated in parts by weight and consists of the following components:

[0122] 100 parts of compound fertilizer, 20 parts of water-retaining slow-release agent, 5 parts of binder and 0.5 part of plant growth regulator.

[0123] The compound fertilizer includes nitrogen fertilizer, phosphorus fertilizer and potassium fertilizer.

[0124] The plant growth regulator is indole butyric acid.

[0125] The binder is polyvinyl alcohol resin.

[0126] The water-retaining slow-release agent is modified montmorillonite nanopowder;

[0127] The preparation method of the modified montmorillonite nano powder is:

[0128] Step 1. activating the montmorillonite, pulverizing it into nanoparticles to obtain activated montmorillonite nanopowder;

[0129] Step 2. reacting barbituric acid and 4-chloro-1-butanol in a lye environment to obtain a barbituric acid reactant;

[0130] Step 3. reacting...

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Abstract

The invention relates to a slow-release water-retaining fertilizer and a preparation method thereof. The slow-release water-retaining fertilizer is prepared from following components in parts by weight: 100 parts of a compound fertilizer, 10-20 parts of a water-retaining slow-release agent, 2-5 parts of an adhesive and 0.01-0.5 part of a plant growth regulator; wherein the water-retaining slow-release agent is modified montmorillonite nano powder; the preparation method of the modified montmorillonite nano powder comprises the following steps: step 1, activating montmorillonite to obtain activated montmorillonite nano powder; step 2, preparing a barbituric acid reactant; step 3, preparing an acrylic acid cross-linked barbituric acid reactant; and step 4, preparing the modified montmorillonite nano powder. The slow-release water-retaining fertilizer prepared by the invention not only has strong water absorption performance and strong water-retaining performance, but also has the effects of adsorbing heavy metals and purifying soil, greatly improves the nutrient utilization rate of the fertilizer and the utilization rate of water resources, reduces agricultural heavy metal pollution, and meets the requirements of national sustainable development strategies.

Description

technical field [0001] The invention relates to the field of slow-release water-retaining fertilizers, in particular to a slow-release water-retaining fertilizer and a preparation method thereof. Background technique [0002] China is a large agricultural country, and the development of agriculture is inseparable from water and fertilizers. China is the world's largest producer and consumer of chemical fertilizers, and at the same time, it is a country that is very short of water resources. According to statistics, my country's per capita water resource occupancy rate is only a quarter of the world's average. At the same time, my country's fertilizer use has shown a substantial growth pattern, but the increase rate of grain production has not reached the same level. There are many reasons for this phenomenon, and the decrease of fertilizer and water utilization rate is an important reason for the decrease of yield increase effect. It is particularly important to improve wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/40C05G3/80C05G5/12
Inventor 于兵高璐阳张强陈贯金姜修山沈彦辉邹朋
Owner 广东金正大生态工程有限公司
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