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Spartina anglica drought-resistant slow-release fertilizer and preparation method thereof

A technology for slow-release fertilizers and rice grass, which is applied to organic fertilizers, inorganic fertilizers, fertilizer mixtures, etc., can solve the problems of input equipment, complex raw material components, and complex production methods, and achieves improved utilization, simple and efficient preparation methods, and high efficiency. Excellent drought resistance

Inactive Publication Date: 2017-03-08
福建省水土保持试验站
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The drought-resistant slow-release urea and its preparation method described in the above-mentioned patents still have the problems of complex raw material components, complex production methods, and the need to invest in equipment, etc., which need to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The method for preparing the above-mentioned Spartina drought-resistant slow-release fertilizer provided by the invention comprises the following steps:

[0027] (1) Crush 20-25 parts of Spartina, add 20-25 parts of urea, and mix well;

[0028](2) React 15-25 parts of acrylamide and 1.0-1.9 parts of potassium persulfate at 60-80°C for 1-3 hours, add 1.5-2.5 parts of plant polyphenols, and add (1) after reacting for 10-20 minutes The resulting product, adjust the pH value to 6-8, then add 2-5 parts of toluene diisocyanate, and stir evenly;

[0029] (3) Add 1.0 to 1.5 parts of starch and 0.1 to 0.5 parts of potassium persulfate into the reactor, heat to 80 to 85°C and react for 1.5 to 2 hours, add 10 to 15 parts of acrylic acid to react for 1.5 to 2 hours, and cool down to 60 to 70 ℃, add the product of (2), add 0.003~0.01 parts of N,N-methylenebisacrylamide to react for 1.5~2h, dry at a temperature of 103±2℃ until the moisture content is below 1wt%, and crush it to obta...

Embodiment 1

[0041] (1) Grind 22.5 parts of Spartina to below 2cm, add 22 parts of urea, and mix well;

[0042] (2) React 18 parts of acrylamide and 1.6 parts of potassium persulfate at 70°C for 2.5 hours, add 1.8 parts of plant polyphenols, react for 10 minutes, add the product of (1), adjust the pH value to 7, and add 3 parts Toluene diisocyanate, stir evenly;

[0043] (3) Add 1.2 parts of starch and 0.2 parts of potassium persulfate into the reactor, heat to 80°C for 1.5 hours, add 12 parts of acrylic acid for 1.5 hours, cool down to 60°C, add the product of (2), and add 0.006 parts N, N-methylenebisacrylamide was reacted for 1.5 hours, dried at 105°C until the moisture content was below 1 wt%, and pulverized to obtain a drought-resistant slow-release fertilizer for Spartina.

Embodiment 2

[0045] (1) Grind 21 parts of Spartina to below 2cm, add 22 parts of urea, and mix well;

[0046] (2) React 18 parts of acrylamide and 1.3 parts of potassium persulfate at 75°C for 2 hours, add 2 parts of plant polyphenols, react for 10 minutes, add the product of (1), adjust the pH value to 7, and add 2.5 parts of toluene Diisocyanate, stir evenly;

[0047] (3) Add 1.2 parts of starch and 0.3 parts of potassium persulfate into the reaction kettle, heat to 80°C for 1.5 hours, add 12 parts of acrylic acid for 1.5 hours, cool down to 60°C, add the product of (2), and add 0.007 parts N, N-methylenebisacrylamide was reacted for 1.5 hours, dried at 105°C until the moisture content was below 1 wt%, and pulverized to obtain a drought-resistant slow-release fertilizer for Spartina.

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Abstract

The invention provides a Spartina anglica drought-resistant slow-release fertilizer and a preparation method thereof. The Spartina anglica drought-resistant slow-release fertilizer comprises the following components: 20 to 25 parts of Spartina anglica, 20 to 25 parts of urea, 1.5 to 2 parts of potassium persulfate, 1.5 to 2.5 parts of plant polyphenol, 10 to 15 parts of acrylic acid, 1.0 to 1.5 parts of starch, 15 to 25 parts of acrylamide, 2 to 5 parts of toluene diisocyanate and 0.003 to 0.01 part of N,N-methylene bisacrylamide. The preparation method comprises the following steps: (1) mixing the Spartina anglica and the urea; (2) subjecting acrylamide, potassium persulfate, plant polyphenol, a product obtained in the step (1) and toluene diisocyanate to a reaction; and (3) subjecting the starch, acrylic acid, potassium persulfate, a product obtained in the step (2) and N,N-methylene bisacrylamide to a reaction, and carrying out drying and crushing so as to obtain a drought-resistant slow-release fertilizer. According to the invention, a fertilizer and water can be repeatedly absorbed and slowly released; and the preparation method is simple and highly-effective, has low energy consumption and is easy to realize industrial production.

Description

technical field [0001] The invention relates to the field of slow-release fertilizers, in particular to a drought-resistant slow-release fertilizer for Spartina and a preparation method thereof. Background technique [0002] Spartina belongs to the Poaceae Spartina genus, which is a perennial wet herbaceous perennial plant. Spartina contains a variety of biologically active substances, such as alkaloids, amino acids, vitamins, etc., and has a high content of crude protein. It is a plant with relatively complete nutrients. . The root system is criss-cross, especially well-developed, has a strong ability to absorb phosphorus, and has a large adaptability. It can grow in seawater and saline soil, and can also grow in fresh water, fresh soil, soft and hard mudflats, and sandy beaches. The tillering ability is particularly strong, and it can increase dozens of times to more than one hundred times in the first year during the intertidal period, and it can be contiguous into past...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCC05C9/00C05G5/30C05D1/00C05F11/00
Inventor 陈善沐卢玉栋林长起林福兴林敬兰林肖文刘丽英陈丽梅
Owner 福建省水土保持试验站
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