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Biological carbon base compound fertilizer and preparing method thereof

A technology of compound fertilizer and biochar, which is applied in the field of compound fertilizer, can solve the problems of difficult scientific ratio of nitrogen release rate and gap in fertilizer effect, and achieve the effects of reducing fertilizer leaching and waste, ventilating root system development, and promoting root system development

Inactive Publication Date: 2012-09-12
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the release rate of nitrogen in ordinary compound (mixed) fertilizers is difficult to maintain a certain scientific ratio with phosphorus and potassium to meet the special needs of nutrients in different crop growth stages
Although the proportions of nitrogen, phosphorus, and potassium are consistent with the fertilizer absorption characteristics of crops in the process of formula design and production of special compound (mixed) fertilizers, when the fertilizer enters the soil, the effect of the fertilizer varies greatly due to various factors.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Using local agricultural waste, such as salix stubble, corn, rice, wheat, soybean, straw and other biomass energy as raw materials, the raw materials are crushed, dried and then carbonized at low temperature to form 40kg of porous biomass carbon black;

[0027] 2. With biomass carbon black as the core, mix compound fertilizer consisting of 20kg of urea and 30kg of potassium dihydrogen phosphate. The total nutrients in the compound fertilizer (N+P 2 o 5 +K 2 O) is 48%, moisture (H 2 O)≤1%;

[0028] 3. Add 10kg of oxidized starch binder, and granulate in the organic and inorganic fertilizer granulator, and the material after wrapping and granulation enters the dryer for drying, and obtains 95kg of granular biochar-based compound fertilizer through cooling and screening, of which the total Nutrients (N+P 2 o 5 +K 2 O) content was 21%, biochar was 31%, and organic matter content was 22%.

Embodiment 2

[0030] 1. Using local agricultural waste, such as salix stubble, corn, rice, wheat, soybean, straw and other biomass energy as raw materials, the raw materials are crushed, dried, and then carbonized at low temperature to form 45.6kg of porous biomass carbon black;

[0031] 2. With biomass carbon black as the core, mixed with compound fertilizer composed of 16kg potassium nitrate, 18kg urea, and 23.6kg potassium dihydrogen phosphate, the total nutrients in the compound fertilizer (N+P 2 o 5 +K 2 O) is 46%, moisture (H 2 O)≤1%;

[0032] 3. Add 16.8kg of attapulgite binder, and granulate in an organic-inorganic fertilizer granulator, wrap the granulated material into a dryer for drying, and obtain 120kg of granular biochar-based compound fertilizer through cooling and screening, of which Total nutrients (N+P 2 o 5 +K 2 O) content is 23%, biochar is 30%, and organic matter content is 23%.

Embodiment 3

[0034] 1. Using local agricultural waste, such as salix stubble, corn, rice, wheat, soybean, straw and other biomass energy as raw materials, the raw materials are crushed, dried and then carbonized at low temperature to form porous biomass carbon black 39.9kg;

[0035] 2. With biomass carbon black as the core, mixed with compound fertilizer composed of 18kg potassium nitrate, 20kg ammonium phosphate and 11.4kg potassium dihydrogen phosphate, the total nutrients (N+P 2 o 5 +K 2 O) is 47%, moisture (H 2 O)≤1%;

[0036]3. Add 5.7kg of oxidized starch binder, and granulate in the organic-inorganic fertilizer granulator. The material after wrapping and granulating enters the drying machine to dry, and obtains 95kg of granular biochar-based compound fertilizer through cooling and screening, of which Total nutrients (N+P 2 o 5 +K 2 O) content was 21%, biochar was 31%, and organic matter content was 22%.

[0037] Beneficial effects of the present invention are further elaborat...

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Abstract

The invention discloses a biological carbon base compound fertilizer which is mainly composed of biomass carbon black and a compound fertilizer. The preparing method of the biomass carbon black includes subjecting agricultural wastes which serve as biomass raw materials to a low-temperature carbonization so as to form the porous biomass carbon black. The invention also discloses a preparing method of the biological carbon base compound fertilizer. The biological carbon base compound fertilizer adopts microporous biomass carbon, has high adsorptive capacity, good light absorption, temperature increasing and sustained release effects, is capable of reducing leaching loss waste of the fertilizer effectively, can be stored for a long time at a normal temperature and subjected to mixing granulation and drying with other organic and inorganic fertilizers without being influenced, and has an obvious synergistic function.

Description

technical field [0001] The invention relates to a compound fertilizer, in particular to a biochar-based compound fertilizer; in addition, the invention also relates to a preparation method of the biochar-based compound fertilizer. Background technique [0002] my country is a country with a large population and a large agriculture. It uses 7% of the world's land to feed 22% of the world's population. The food issue is always a major issue related to the national economy and people's livelihood. my country has 2 billion mu of arable land and needs 150 million tons of fertilizers annually. It is the world's largest importer of fertilizers and producer of nitrogen fertilizers. Even so, the amount of chemical fertilizers still cannot meet the needs of agricultural development. The reason is that the key problem is that the utilization rate of chemical fertilizers is too low. According to surveys, the utilization rate of chemical fertilizers in my country is only 35%-40%, and t...

Claims

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Application Information

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IPC IPC(8): C05G3/00
Inventor 潘文灏吴瑞斌张黎明李玉梅
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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