Fe/graphene/biomass charcoal carbon-based slow-release compound fertilizer special for corn and application of compound fertilizer

A technology of slow-release compound fertilizer and biomass charcoal, applied in the field of fertilizer, can solve the problem of large fertilizer application amount, etc., and achieve the effect of prolonging fertilizer efficiency, tightly combining and changing chemical shift.

Inactive Publication Date: 2019-07-09
QINGDAO AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong complexation and adsorption capacity of biochar, when it is co-applied with chemical fertilizers, it is prone to rapid release and the problem of large fertilizer application

Method used

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  • Fe/graphene/biomass charcoal carbon-based slow-release compound fertilizer special for corn and application of compound fertilizer
  • Fe/graphene/biomass charcoal carbon-based slow-release compound fertilizer special for corn and application of compound fertilizer
  • Fe/graphene/biomass charcoal carbon-based slow-release compound fertilizer special for corn and application of compound fertilizer

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preparation example Construction

[0049] In the present invention, the preparation method of special charcoal-based slow-release compound fertilizer for corn comprises the following steps:

[0050] Mix the raw materials in the above scheme, and granulate the obtained materials. The granulation process uses water vapor as the reaction medium, and the amount of steam is 30% to 35% of the total mass of the raw materials. The granulation temperature is controlled by water vapor to be 110 ~ 130°C; dry the formed biomass charcoal-based fertilizer particles at 300-350°C, control the water content to less than 8wt%, and then sieve. The particle size of the biochar-based fertilizer is preferably larger than 1 mm and smaller than 5.25 mm.

[0051] The preparation method of the special biomass charcoal-based fertilizer for corn provided by the present invention, the granulation process has both physical and chemical double reactions, and under the reaction conditions of high-temperature steam, the amide bond of calcium c...

Embodiment 1

[0056] The preparation method of Fe / graphene / biomass charcoal is as follows:

[0057] Crush corn stalks, pass through a 10-mesh sieve, and mix them with graphene at a mass ratio of 150:1. After stirring evenly, place them in a preheated 100°C muffle furnace and heat at 100°C for half an hour, and then raise the temperature to 200°C to burn Cook for 3 hours, then fire at 400°C for 3 hours, and finally fire at 500°C for half an hour to obtain graphene biochar.

[0058] Take graphene biochar, wash it with water until neutral, dry it at 80°C, grind it with a mortar, and pass it through a 150-mesh sieve.

[0059] Take analytically pure FeCl 3 Dissolve in water at 60°C to prepare 0.05mol / L FeCl 3 solution, adding dried biochar, the mass of graphene biochar particles and FeCl 3 The volume ratio of the solution is 1g: 12.5ml, stir and mix well. Place it in an environment of 60°C for 2 hours; put it in an oven at a temperature of 105°C to evaporate the water to dryness, and then he...

Embodiment 2

[0062] A special modified biomass charcoal-based fertilizer for corn, comprising the following raw materials in parts by weight: Fe / graphene / biomass charcoal 16kg prepared in Example 1, ammonium sulfate 12kg, potassium dihydrogen phosphate 18kg, bentonite 5kg, calcium sulfate 5kg, The ratio of Trichoderma viridans F7 culture 6kg and 4kg is borax:zinc sulfate=1:1.8 (mass ratio), mixture. Its preparation method is:

[0063] (1) Each component is weighed and mixed uniformly;

[0064] (2) The mixed raw materials are granulated. The granulation process uses high-temperature steam as the reaction medium. The amount of steam used is 30% of the total mass of the raw materials. The granulation temperature is controlled by high-temperature steam to be 110°C.

[0065] (3) Dry the formed biochar-based fertilizer particles at 330°C, control the water content to be lower than 8wt%, and then sieve. The particle size of the biochar-based compound fertilizer is greater than 1mm and less than...

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Abstract

The invention provides an Fe/graphene/biomass charcoal carbon-based slow-release compound fertilizer special for corn and an application of the compound fertilizer, and belongs to the technical fieldof fertilizers. The preparation method comprises the following steps: mixing crushed corn straw fragments with graphene, and sequentially carrying out firing at temperatures of 95-105 DEG C, 190-210 DEG C, 385-415 DEG C and 495-505 DEG C, washing the obtained graphene biomass charcoal to be neutral, carrying out crushing and sieving, mixing the collected graphene biomass carbon particles with an FeCl3 solution, and carrying out heat treatment to obtain the Fe/graphene/biomass charcoal. The carbon-based slow-release compound fertilizer special for corn comprises Fe/graphene/biomass charcoal, ammonium sulfate, potassium dihydrogen phosphate, bentonite, calcium sulfate, a trichoderma viride F7 culture substance and a mixture of borax and zinc sulfate. Through the slow-release action of biomass charcoal and the decomposition effect of biological strains, absorption of corn crops to nutrient elements is enhanced, growth conditions of corn is improved, and the effects of losing weight and enhancing efficiency are achieved.

Description

technical field [0001] The invention belongs to the technical field of fertilizers, and in particular relates to a Fe / graphene / biomass charcoal, special carbon-based slow-release compound fertilizer for corn and its application. Background technique [0002] Maize is an annual herbaceous plant of the Poaceae Zea genus. It has tall plants and strong stems. It is an important food crop and feed crop, and it is also the crop with the highest total output in the world. In order to increase the yield of corn, the phenomenon of unreasonable and excessive use of chemical fertilizers is particularly common. Excessive and unreasonable application of chemical fertilizers not only wastes valuable agricultural resources, but also leads to a rapid decline in soil fertility, affecting crop yield and quality. In addition, after a large amount of chemical fertilizers are applied, a large part of them will enter the surrounding water bodies with the runoff of farmland drainage, forming agri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04A01G22/20C05G3/80
CPCA01G22/20C05B7/00C05G3/00C05G3/80C05G5/12C05C3/00C05D3/00C05D9/00C05D9/02C05F11/08
Inventor 刘君宋宁宁王凯荣柳新伟
Owner QINGDAO AGRI UNIV
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