Charcoal-based stable compound fertilizer and preparation method thereof

A biochar and stability technology, applied in fertilization devices, fertilizer mixtures, agricultural gas emission reduction, etc., can solve the problems of not fundamentally exploring the special functions of biochar, ignoring biochar, and the effect of adsorption materials are very different, so as to save The cost of fertilization, the simple and easy preparation method, and the effect of improving the quality of agricultural products

Active Publication Date: 2014-12-10
INST OF AGRI RESOURCES & ENVIRONMENT GUANGDONG ACADEMY OF AGRI SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, there are great differences in the pH value, porosity, specific surface area, and special functional group structure of biochars with different raw materials and preparation conditions, which also lead to different effects as adsorption materials. It is more obvious when adsorbing materials with different forms of ni

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  • Charcoal-based stable compound fertilizer and preparation method thereof
  • Charcoal-based stable compound fertilizer and preparation method thereof

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preparation example Construction

[0039] The present invention also provides a preparation method for the above-mentioned biochar-based stable compound fertilizer, comprising the following steps:

[0040] (a) Mix the biochar with the humic acid to prepare a first mixture with a water content of 35-45%, leave it at room temperature for 70-75 hours, and dry it until the water content is 18-22%;

[0041] (b) uniformly mixing the dried first mixture with the nitrogen conversion inhibiting material to obtain a second mixture;

[0042] (c), mixing the nitrogen-containing substance, phosphorus-containing substance, potassium-containing substance, viscous minerals, and granulation binder with the second mixture, granulating, and spraying urea-formaldehyde resin for coating after granulation, Then drying to obtain the biochar-based stable compound fertilizer.

[0043] The preparation method of the biochar-based stable compound fertilizer provided by the embodiment of the present invention first mixes the biochar with ...

Embodiment 1

[0046] Crush citrus branches, banana stalks, and imperial bamboo grass to a diameter of ≤ 2.5 cm, anaerobically crack them at 500°C for 3 hours, pass through a 200-mesh sieve after crushing, and prepare citrus branches, banana stalks, and imperial bamboo grass The biochar is mixed evenly according to the weight ratio of 1:1:2.5;

[0047] Mix 0.5 parts of biochar mixture with 0.08 parts of humic acid with a pH of 3.8 and pass through a 200-mesh sieve, adjust the water content to 45%, and dry it after standing for 70 hours;

[0048] Then mix homogeneously with 0.02 part of dicyandiamide and 0.025 part of hydroquinone to obtain the second mixture;

[0049] The second mixture is mixed with 45 parts of urea (powder), 15 parts of monoammonium phosphate (powder), 30 parts of potassium chloride (powder), 1 part of attapulgite powder passed through a 200 mesh sieve, 8 parts of a 200 mesh sieve Limestone powder, 0.2 parts of sodium silicate (sprayed after water-soluble) are mixed for d...

Embodiment 2

[0056] Grind citrus branches, corn stalks, and royal bamboo grass to a diameter of ≤ 2.5 cm, crack anaerobically at 500°C for 2.5 hours, and pass through a 250-mesh sieve after crushing to obtain The biochar is mixed evenly according to the weight ratio of 1:1:2;

[0057] Take 0.9 part of the biochar mixture and mix it with 0.1 part of humic acid with a pH of 4.0 and pass through a 200-mesh sieve, adjust the water content to 35%, and dry it after standing for 70 hours;

[0058] Then mix homogeneously with 0.02 part of dicyandiamide, 0.021 part of N-butyl thiophosphoric triamide (NBPT), obtain the second mixture;

[0059] The second mixture is mixed with 41 parts of urea (powder), 13 parts of monoammonium phosphate (powder), 34 parts of potassium sulfate (powder), 2 parts of attapulgite powder crossed 200 mesh sieve, 7 parts of Limestone powder, 2 parts of zeolite powder, and 0.2 parts of sodium silicate (sprayed after water-soluble) are mixed and granulated by a drum granulat...

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Abstract

The invention relates to the field of fertilizers, in particular to a charcoal-based stable compound fertilizer and a preparation method thereof. The charcoal-based stable compound fertilizer comprises the following raw materials: charcoal, nitrogenous substances, phosphorus-containing substances, potassium-containing substances, sticky minerals, a nitrogen transformation inhibition material, enveloping substances and a pelleting adhesive, wherein the enveloping substances comprise humic acid and urea formaldehyde resin. According to the charcoal-based stable compound fertilizer, the raw materials are in synergic matching in a certain ratio, and the requirements of crops can be well met; by mixing the charcoal and the humic acid, the acid-alkali balance, the nutrient adsorption and the sticky adsorption of the charcoal and the humic acid are achieved, a very good compounding effect is achieved, and the problem that the properties of the charcoal are not sufficiently utilized is solved; the charcoal-based stable compound fertilizer can be simply used, the fertilizer utilization rate is effectively increased, the acid soil and the soil structure can be improved, advantages that the fertilization cost in agriculture production is reduced, the yield is increased and the quality of agriculture products is improved are realized, and the preparation method is simple and feasible.

Description

technical field [0001] The invention relates to the field of fertilizers, in particular to a biochar-based stable compound fertilizer and a preparation method thereof. Background technique [0002] The amount of chemical fertilizer used in my country's agricultural production remains high. In addition to the objective reasons such as the lack of improvement in the original productivity of the soil, the increase in the proportion of low- and medium-yielding fields, and the high multiple cropping index, the low utilization rate of chemical fertilizers is one of the main reasons. On the one hand, the continuous and large-scale input of chemical fertilizers has caused a huge waste of resources and increased the cost of sustainable social development; on the other hand, it has caused soil compaction and acidification to intensify, thereby reducing land productivity. The reduction of land productivity is also manifested in the reduction of soil microbial diversity, unreasonable co...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/08C05G3/90
CPCY02P60/21Y02A40/22
Inventor 逄玉万唐拴虎杨少海徐培智张发宝黄旭易琼黄巧义李苹付弘婷
Owner INST OF AGRI RESOURCES & ENVIRONMENT GUANGDONG ACADEMY OF AGRI SCI
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