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Nano paste-sugarcane leaf/bagasse composite enveloped slow-release nitrogen fertilizer and preparation method thereof

A coated slow-release, nano-gel technology, applied in urea compound fertilizer, layered/coated fertilizer, nitrogen fertilizer and other directions, can solve problems such as air pollution, achieve long fertilizer efficiency cycle, low cost, and improve the effect of slow release effect

Inactive Publication Date: 2017-05-31
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to statistics, the annual output of sugarcane leaves and the total amount of bagasse discarded in the sugar production process in my country reached hundreds of millions of tons. Most of these sugarcane leaves and bagasse were not fully utilized and were burned directly, causing serious air pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1, a kind of preparation method of nano glue-cane leaf / bagasse composite coating slow-release nitrogen fertilizer, comprises the following steps:

[0018] (1) Preparation of bagasse biochar: crush the bagasse, place it in a carbonization furnace, heat it to 250-650°C at a heating rate of 15°C / min, carbonize for 3 hours, and grind through a 90-mesh sieve to obtain bagasse biochar;

[0019] (2) Fertilizer core preparation: Take 55 parts of urea, 20 parts of bagasse biochar, 12 parts of bentonite, and 4 parts of carboxymethyl cellulose in parts by mass, mix them, spray water and stir until they are evenly mixed, and then make them by extrusion. The grains are fertilizer core grains;

[0020] (3) Preparation of sugarcane leaf cellulose homogenate: crush the dried sugarcane leaves through a 90-mesh sieve to obtain sugarcane leaf powder; take 10 parts of sugarcane leaf powder and add them at a ratio of 1:4~10 to a final mass concentration of 8%. In the mixed solut...

Embodiment 2

[0023] Embodiment 2, a kind of preparation method of nano glue-cane leaf / bagasse composite coating slow-release nitrogen fertilizer, comprises the following steps:

[0024] (1) Preparation of bagasse biochar: crush the bagasse, place it in a carbonization furnace, heat it to 250-650°C at a heating rate of 10-20°C / min, carbonize it for 1-4 hours, and grind it through a 100-mesh sieve to obtain Bagasse biochar;

[0025] (2) Fertilizer core preparation: in parts by mass, take 60 parts of ammonium nitrate, 15 parts of bagasse biochar, 12 parts of bentonite, and 2 parts of carboxymethyl cellulose, mix them, spray water and stir until they are evenly mixed, and then squeeze Granulate into fertilizer core granules;

[0026] (3) Preparation of sugarcane leaf cellulose homogenate: crush the dried sugarcane leaves through an 80-mesh sieve to obtain sugarcane leaf powder; take 15 parts of sugarcane leaf powder and add them to a final mass concentration of 9% at a feed ratio of 1:4~10 I...

Embodiment 3

[0029] Embodiment 3, a kind of preparation method of nano glue-cane leaf / bagasse composite coating slow-release nitrogen fertilizer, comprises the following steps:

[0030] (1) Preparation of bagasse biochar: after pulverizing bagasse, put it in a carbonization furnace, heat it to 450°C at a heating rate of 10°C / min, carbonize for 2 hours, and grind through an 80-mesh sieve to prepare bagasse biochar;

[0031] (2) Fertilizer core preparation: In parts by mass, take 70 parts of ammonium sulfate, 10 parts of bagasse biochar, 12 parts of bentonite, and 6 parts of carboxymethyl cellulose, mix them, spray water and stir until they are evenly mixed, and then squeeze Granulate into fertilizer core granules;

[0032] (3) Preparation of sugarcane leaf cellulose homogenate: crush the dried sugarcane leaves through an 80-mesh sieve to obtain sugarcane leaf powder; take 15 parts of sugarcane leaf powder and add them to a final mass concentration of 9% at a feed ratio of 1:4~10 In a mixed...

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Abstract

The invention relates to nano paste-sugarcane / bagasse composite enveloped slow-release nitrogen fertilizer and a preparation method thereof, characterized in that bagasse biological charcoal, carboxymethyl cellulose, bentonite and nitrogen fertilizer are used as a fertilizer core, sugarcane leaf cellulose is used as an inner layer envelope on the surface of the fertilizer core, and environment sensitive nano paste is used as an outer layer envelope. The bagasse biological charcoal and sugarcane leaves used in the fertilizer are rich in soil nutrients such as nitrogen, phosphorus, potassium and organic matters, and the fertilizer efficiency is good. The nano paste outer layer envelope can response to change of the ambient temperature and pH value, and forms a water fertilizer integrated slow / controlled-release system through the shrinking / swelling process of the nano paste, thereby fully improving the slow-release effect of the nitrogen fertilizer and improving the utilization efficiency of the moisture resource. The nitrogen fertilizer and the preparation method thereof have a simple production process, low cost and renewable raw materials, have the advantages of intellectualized fertilization, long cycle of fertilizer efficiency, greenness, environmental protection and the like, and have practicability and originality on development of high efficiency functional fertilizer and development of fertilizer reduced synergism agriculture modernization industrial technique.

Description

technical field [0001] The invention relates to a slow-release nitrogen fertilizer and a preparation method thereof, in particular to a nano-glue-cane leaf / bagasse composite coated slow-release nitrogen fertilizer and a preparation method thereof, belonging to the technical field of fertilizer production. Background technique [0002] Nitrogen fertilizer plays a key role in improving crop yield and agricultural economic benefits, but long-term and unreasonable application of nitrogen fertilizer has caused accelerated acidification of farmland soil in my country and a large amount of nitrogen fertilizer loss. my country's nitrogen fertilizer consumption accounts for nearly one-third of the world's total nitrogen fertilizer consumption, while the national nitrogen fertilizer loss rate is as high as 40-50%. Nitrogen that exceeds the amount absorbed by crops remains in the soil, and is converted to NO 3- -N, N 2 A large amount of active nitrogen such as O is lost to the enviro...

Claims

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Application Information

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IPC IPC(8): C05G5/00C05G3/00
CPCC05C1/00C05C3/00C05C9/00C05G5/12C05G5/30C05D9/00C05F11/00
Inventor 胡朝华袁照年黄伟蔡银翔黄潮华邓祖湖陈如凯
Owner FUJIAN AGRI & FORESTRY UNIV
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