Double-layer coated slow-release nitrogen fertilizer for improving saline-alkali soil and preparation method thereof

A double-layer coating, saline-alkali land technology, applied in the field of slow-release fertilizers, can solve the problems of high prices of controlled-release fertilizers, restrictions on large-scale applications, and complicated production processes for controlled-release materials, and achieves improved long-acting slow-release performance. The effect of reducing volatilization and leaching loss, improving water absorption, water retention and salt tolerance

Inactive Publication Date: 2017-05-24
张明玉
View PDF2 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although slow-release and controlled-release fertilizers have good potential economic and social benefits and have been commercialized, their large-scale application in agriculture is still limited, accounting for less than 0.5% of the world's total fertilizer consumption. The production process is complex, resulting in high prices for controlled-release fertilizers

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] A double-coated slow-release nitrogen fertilizer for improving saline-alkali land, which consists of the following raw materials in parts by weight: urea 65, ammonium phosphate 27, acrylic acid 40, wheat straw 20, distilled water, potassium hydroxide 5, sodium borohydride 1, Humic acid 13, anhydrous sodium sulfite 10, formaldehyde solution 7, ammonium persulfate 6, N,N'-methylenebisacrylamide 2, sodium alginate 13, 5% calcium chloride aqueous solution, paraffin 3, furfural slag 3 , Attapulgite clay 8, dilute sulfuric acid 4, appropriate amount of 10% sodium hydroxide solution.

[0027] Specific steps are as follows:

[0028] (1) Straw pretreatment:

[0029] Crush the wheat straw, add distilled water with a mass ratio of 60 times the wheat straw, place the suspension in a water bath at 65°C, filter after 16 hours, add the filtrate to an aqueous solution containing potassium hydroxide and sodium borohydride, Under mechanical stirring for 3 hours, filter the above suspen...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a double-layer coated slow-release nitrogen fertilizer for improving saline-alkali soil. The nitrogen fertilizer is composed of the following raw materials in parts by weight: 55-70 parts of urea, 22-30 parts of ammonium phosphate, 35-50 parts of acrylic acid, 15-25 parts of wheat straw, a right amount of distilled water, 2-7 parts of potassium hydroxide, 0.5-2 parts of sodium borohydride, 10-16 parts of humic acid, 8-12 parts of anhydrous sodium sulfite, 5-9 parts of formaldehyde solution, 3-7 parts of ammonium persulfate, 1-3 parts of N,N'-methylenebisacrylamide, 9-16 parts of sodium alginate, a right amount of 5% calcium chloride water solution, 2-4 parts of paraffin, 2-4 parts of furfural residue, 4-10 parts of attapulgite clay, 2-5 parts of dilute sulfuric acid and a right amount of sodium hydroxide solution. According to the invention, the humic acid is modified to enhance the water solubility, and the urea fertilizer effect and the nitrogen utilization ratio are increased, thereby improving the water absorption property, water retention property and salt tolerance of the slow-release fertilizer.

Description

technical field [0001] The invention relates to the technical field of slow-release fertilizers, in particular to a double-coated slow-release nitrogen fertilizer for improving saline-alkali land and a preparation method thereof. Background technique [0002] Slow release fertilizer refers to a new type of fertilizer that can slow down or control the release rate of nutrients. Slow-release fertilizers have low solubility in water, and the nutrients are released slowly in the soil, reducing the loss of nutrients; the fertilizer effect is long-term and stable, and the energy can continuously supply the nutrient needs of plants throughout the growth period; suitable for different types of soil and plants , effectively prevent soil compaction. Although slow-release and controlled-release fertilizers have good potential economic and social benefits and have been commercialized, their large-scale application in agriculture is still limited, accounting for less than 0.5% of the wo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05G3/00C05G3/80
CPCC05B7/00C05G3/00C05G3/80C05G5/30C05C9/00C05D9/00C05F5/006C05F11/00C05F11/02
Inventor 张明玉
Owner 张明玉
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap