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Environment-friendly composite water retention agent, preparation and using method thereof

An environmentally friendly, water-retaining agent technology, applied in chemical instruments and methods, applications, fertilizer mixtures, etc., can solve the problems of high cost of water-retaining agent, low gel strength, and insufficient nutrition, and achieve easy degradation and fruit rate without root rot , the effect of high yield

Active Publication Date: 2012-12-26
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the shortcomings of existing water-retaining agents such as high cost, difficult degradation, low gel strength and insufficient nutrition, and provide an environmentally friendly nutritional composite water-retaining agent and its preparation and use method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The sorghum stalks are crushed through an 80-mesh sieve, and the dried cow dung is crushed through an 80-mesh sieve for later use;

[0031] Dissolve 1 g of urea in 50 mL of water, add 5 g of loess, stir for 0.5 h, filter, dry, and crush through an 80-mesh sieve to obtain loess rich in urea;

[0032] Add 15g of acrylic acid monomer into the reaction kettle, add NaOH solution, the neutralization degree is 60%, add 0.5L of distilled water and stir evenly, then add 0.0075g of cross-linking agent (N,N-methylenebisacrylamide and pentanedi aldehyde mass ratio of 1:1 mixture) and 0.03g initiator potassium persulfate, heated up to 80°C, reacted for 1h, and obtained about 15g of acrylic acid prepolymer;

[0033] Add 3g of sorghum straw powder, 1.5g of dry cow dung powder and 1.5g of loess adsorbed with urea to the above-mentioned acrylic acid prepolymer, stir for 1 hour to obtain a gel, granulate, and dry to obtain an environmentally friendly nutritional composite water retaining...

Embodiment 2

[0035] Corn stalks are crushed through a 80-mesh sieve, corn cobs are crushed through a 40-mesh sieve, and dried sheep manure is crushed through a 80-mesh sieve for later use;

[0036] Dissolve 2g of diammonium phosphate in 50mL of water, add 10g of loess, stir for 1.5h, filter, dry the filter residue, and crush it through an 80-mesh sieve to obtain loess adsorbed with diammonium phosphate;

[0037] Add 15g of acrylic acid monomer into the reaction kettle, add KOH solution, the neutralization degree is 80%, add 0.6L of water and stir evenly, then add 0.0135g of cross-linking agent (N,N-methylenebisacrylamide and pentanedi aldehyde mass ratio of 5:1) and 0.0525g initiator potassium persulfate, heated to 85°C, reacted for 0.5h, and obtained about 15g of acrylic acid prepolymer;

[0038] Add 4.5g of corn stalk powder, 3g of corncob powder, 2.25g of dry sheep dung powder and 7.5g of loess adsorbed with diammonium phosphate to the above-mentioned acrylic acid prepolymer, stir for 1...

Embodiment 3

[0040] Wheat straw is crushed through an 80-mesh sieve, bean stalks are crushed through a 60-mesh sieve, bean dregs are crushed through a 60-mesh sieve, dried chicken manure is crushed through a 40-mesh sieve, and dried pig manure is crushed through a 60-mesh sieve for later use;

[0041] Dissolve 5 g of potassium sulfate and 3 g of urea in 0.8 L of water, add 15 g of loess, stir for 2 hours, filter, dry the filter residue, and pulverize through a 60-mesh sieve to obtain loess adsorbed with potassium sulfate and urea;

[0042] Add 15g of acrylic acid monomer into the reaction kettle, add NaOH solution, the neutralization degree is 70%, add 0.7L of water and stir evenly, then add 0.0105g of cross-linking agent (N,N-methylenebisacrylamide and glutaric acid aldehyde mass ratio of 3:1 mixture) and 0.045g initiator potassium persulfate, heated to 85°C, reacted for 1h, and obtained about 15 g of acrylic acid prepolymer;

[0043] Add 1.5g of wheat straw powder, 1.5g of bean stalk pow...

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Abstract

The invention discloses an environment-friendly composite water retention agent which comprises loess absorbing an inorganic fertilizer, plant waste, dry animal waste and an acrylic polymer, wherein the loess absorbing the inorganic fertilizer, the plant waste and the dry animal waste are dispersed in the acrylic polymer, and the acrylic polymer is firstly pre-polymerized and then added with nutritional ingredients to be mixed, so that various nutritional ingredients can be prevented from participating into polymerization crosslinking reaction of crylic acid, and the original nutritional ingredients are kept. Meanwhile, nutritional ingredients are uniformly dispersed into the acrylic polymer to be combined into a whole without separation, so that the composite water retention agent is more convenient to use, and enough nutritional ingredients required for growth are uniformly provided to the plant while water retention is achieved. The environment-friendly composite water retention agent is characterized in that the environment-friendly composite water retention agent is suitable for dry areas lack of water, for example, economic trees such as calcium humilis and shinyleaf yellowhorn planted in a desertification area in northern China; the setting ratio is high, and roots are not rotted. The gel strength of the water retention agent is 180-210g / cm<2> and the moisture pickup is 250-450g / g.

Description

technical field [0001] The invention belongs to the field of plant cultivation, and in particular relates to an environment-friendly nutrient-type composite water-retaining agent and its preparation and use methods. Background technique [0002] China's desertification land area is 2.622 million square kilometers, accounting for 27.4% of the country's land area, and nearly 400 million people are affected by desertification. Among the desertified lands in China, the area of ​​desertification caused by wind erosion is the largest, accounting for 1.607 million square kilometers. According to statistics, since the 1970s, only the expansion rate of land desertification has reached 2,460 square kilometers per year. [0003] The desertification of the land has created a material source for the wind and sand. Therefore, sandstorms in northern China (strong sandstorms are commonly known as "black wind". Because you can't see your fingers when you enter the sandstorms) occur more an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/22C09K101/00
Inventor 雷自强魏博王小亮李芳红杨翠玲崇雅丽张哲周鹏鑫
Owner NORTHWEST NORMAL UNIVERSITY
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