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Fertilizer rich in nitrogen and phosphorus and preparation method thereof

A fertilizer and phosphoric acid technology, applied in nitrogen fertilizer, organic fertilizer, excretion fertilizer, etc., can solve the problem of low quality of compost, and achieve the effect of increasing fertilizer efficiency, benefiting growth and improving utilization rate

Inactive Publication Date: 2010-06-09
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods control the loss of compost nitrogen to a certain extent, but do not fundamentally solve the problem of low compost quality

Method used

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  • Fertilizer rich in nitrogen and phosphorus and preparation method thereof
  • Fertilizer rich in nitrogen and phosphorus and preparation method thereof
  • Fertilizer rich in nitrogen and phosphorus and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1, magnesium hydroxide, phosphoric acid, urea, straw, livestock and poultry excrement are 1.4: 2.4: 2.2: 41: 53 (dry weight) by mass ratio and prepare compost product

[0026] Use pig manure and corn stalks crushed to a length of 1 cm as composting materials, mix pig manure, straw, urea, magnesium hydroxide, and phosphoric acid according to the dry weight ratio of 53:41:2.2:1.4:2.4, and make the mixed material C / N ratio=15, the wet weight of the material is about 21.5kg (when the moisture content is 65%).

[0027] 110g of magnesium hydroxide was mixed with 2kg of water, and then slowly poured into 118ml of phosphoric acid to obtain a granular emulsion. Among them, Mg(OH) 2 and H 3 PO 4 The mass ratio of 1.4:2.4, Mg(OH) 2 and H 3 PO 4 The mass accounts for 3.8% of the total dry matter weight of the material.

[0028] Mix and stir the compost material to adjust the moisture, add the above emulsion, and make the emulsion particles evenly adhere to the su...

Embodiment 2

[0040] Embodiment 2, magnesium hydroxide, phosphoric acid, urea, straw, livestock and poultry excrement are 1.7: 5.6: 2.1: 39.6: 51 (dry weight) preparation compost product by mass ratio

[0041]Pig manure, straw, urea, magnesium hydroxide, phosphoric acid are mixed according to the dry weight ratio of 51: 40: 2.1: 1.7: 5.6, so that the mixed material C / N ratio=15, and the total weight of the material is 21.8kg (when the moisture content is 65% of the time).

[0042] 133g of magnesium hydroxide was mixed with 2kg of water, and then slowly poured into 286ml of phosphoric acid to obtain a granular emulsion. Among them, Mg(OH) 2 and H 3 PO 4 The mass ratio of 1.7:5.6, Mg(OH) 2 and H 3 PO 4 The mass accounts for 7.3% of the total dry matter weight of the material.

[0043] Through proper stirring, the milky particles are evenly attached to the surface of the material, so that the ammonia in the compost and the odor caused by it can be controlled during the compost productio...

Embodiment 3

[0048] Embodiment 3, magnesium hydroxide, phosphoric acid, urea, straw, livestock and poultry excrement are 1.5: 7.4: 2.1: 39: 50 (dry weight) preparation compost product by mass ratio

[0049] Pig manure, straw, urea, magnesium hydroxide and phosphoric acid are mixed according to the dry weight ratio of 50:39:2.1:1.5:7.4, so that the C / N ratio of the mixed material=15, and the total weight of the material is 22kg (when the moisture content is 65 %Time).

[0050] 122g of magnesium hydroxide was mixed with 2kg of water, and then slowly poured into 392ml of phosphoric acid to obtain a granular emulsion. Among them, Mg(OH) 2 and H 3 PO 4 The mass ratio of 1.5:7.4, Mg(OH) 2 and H 3 PO 4 The mass accounts for 8.9% of the total dry matter weight of the material.

[0051] Through proper stirring, the milky particles are evenly attached to the surface of the material, so that the ammonia in the compost and the odor caused by it can be controlled during the compost production an...

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Abstract

The invention discloses a fertilizer rich in nitrogen and phosphorus and a preparation method thereof. The fertilizer is prepared by using 1.4 to 1.7 parts by mass of magnesium hydroxide, 2.4 to 7.4 parts by mass of phosphate, water, 2.1 to 2.2 parts by mass of urea, 39 to 41 parts by mass of straw and 50 to 53 parts by mass of manure as raw materials and comprising the following steps of: (1) mixing the magnesium hydroxide and the phosphate with the water for preparing emulsion; (2) mixing the emulsion of step (1) and the urea with compost materials and then statically closing and fermenting for obtaining the fertilizer, wherein the compost materials are the straw and the manure; and the parts by mass of the straw and the manure are both dry weight. The fertilizer has simple operation and easy execution and is suitable for composting rubbish, manure and the like. By using the method for composting, nitrogen loss and odor are reduced, the fertilizer effect of composting products is increased, the fertilizer containing guano is finally obtained, and the composting quality is enhanced.

Description

technical field [0001] The invention relates to a nitrogen-rich and high-phosphorus fertilizer and a preparation method thereof. Background technique [0002] In recent years, the degradation of compost quality and the emission of odor from composting plants due to the release of ammonia during the composting process have always been the focus of scholars' attention. According to the law of nitrogen loss, scholars have adopted different methods to control, which can be divided into several categories: one is to adjust the material properties, such as adding carbon-rich substances to adjust the C / N ratio of materials, or through pickling The second is to directly use some ammonia absorption materials, such as activated carbon, zeolite, bentonite, etc. (Witter, E, 1989); the third is to add some chemical reagents (Jeong, 2001; Hu, 2006;), and The principle is to achieve the purpose of controlling nitrogen directly through chemical reactions or by affecting the properties of m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00C05C9/00C05F3/00
CPCY02A40/20
Inventor 李国学任丽梅沈玉君
Owner CHINA AGRI UNIV
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