Environmentally friendly biochar-based fertilizer and application method thereof
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A biochar-based fertilizer, an environmentally friendly technology, applied in the direction of fertilization methods, applications, organic fertilizers, etc., can solve the problems of unconsidered removal, etc., and achieve the effects of high survival rate of viable bacteria, reduced safety risks, and long-lasting fertilizer effect
Active Publication Date: 2013-11-20
上海孚祥生态环保科技股份有限公司
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The main disadvantage of these technologies is that they do not consider the removal of polycyclic aromatic hydrocarbons and other pollut
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Embodiment 1
[0031] The preparation process of the environment-friendly biochar-based fertilizer of the present embodiment is as follows: figure 1 As shown, the specific steps are as follows:
[0032] 1. Preparation of biochar: At 500°C, use crushed rice straw under oxygen-limited conditions, use a carbonization furnace to pyrolyze for 4 hours to prepare biochar, grind it, and pass through an 80-mesh sieve;
[0033] 2. Preparation of composite bacterial agent: select Bacillus (CGMCC NO: 1.4255), Pseudomonas (CGMCC NO: 1.3187), and actinomycetes (ATCC NO: 13684) to mix and prepare, and its weight ratio is 1:1: 1. The strains used were commonly used strains, purchased from the China General Microorganism Culture Collection (CGMCC) and the American Type Culture Collection (ATCC).
[0034] 3. Immobilization of biochar: Put the mixed degrading bacteria into the liquid medium for activation; take 5ml into the triangle flask with 500ml medium, shake the flask to culture, and make the seed mediu...
Embodiment 2
[0045] The preparation process of the environment-friendly biochar-based fertilizer of the present embodiment is as follows: figure 1 As shown, the specific steps are as follows:
[0046] 1. Preparation of biochar: 500°C (can be any value between 300°C ~ 700°C, preferably any value between 300°C ~ 500°C), use the pulverized rice straw under oxygen-limited conditions, and use a carbonization furnace to pyrolyze for 4 hours (It can be any value in 1 to 5 hours) Prepare biochar, grind it, and pass through an 80 mesh sieve (it can be 20 to 100 mesh sieve, preferably 80 to 100 mesh sieve);
[0047]2. Preparation of compound bacterial agent: select Bacillus (ATCC NO: 65374), Pseudomonas (CGMCC NO: 1.3187), Actinomyces (ATCC NO: 13684), Klebsiella (CGMCC NO: 1.3718) , mixed preparation; the weight ratio is 1:1:1:1; the strains used are commonly used strains, purchased from China General Microorganism Culture Collection Center (CGMCC) and American Type Culture Collection (ATCC).
[...
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Abstract
The invention discloses an environmentally friendly biochar-based fertilizer and an application method thereof. The preparation of the biochar-based fertilizer comprises the following steps of: drying and crushing forestry and agricultural residues, then performing oxygen limited pyrolysis on the crushed materials for 1-5 hours at 300 to 700 DEG C, and sieving, thereby obtaining biochar; and after the biochar is fixed with persistent organic pollutant degrading bacteria, mixing the biochar with a fertilizer, stirring the two thoroughly, and adding a binder accounting for 1wt%-4wt% of the total weight, thus obtaining the environmentally friendly biochar-based fertilizer. For application, the prepared environmentally friendly biochar-based fertilizer is applied to soil by 100-1000 kg per hectare; the surface layer of soil, to which the biochar-based fertilizer is applied previously, is turned over by 0-20 cm, so that the biochar-based fertilizer is mixed with the soil thoroughly, and then the soil can be used for planting crops. The environmentally friendly biochar-based fertilizer provided by the invention overcomes the shortcoming that present biochar-based fertilizers contain organic pollutants such as polycyclic aromatic hydrocarbon, the influence of the fertilizer on soil and environment is alleviated, and the safety risk of agricultural products is reduced; moreover, the environmentally friendly biochar-based fertilizer has the advantages of simple and practicable preparation process, low cost and the like.
Description
technical field [0001] The invention relates to fertilizers, in particular to an environment-friendly biochar-based fertilizer and an application method thereof. Background technique [0002] Biochar is a highly aromatic carbon-containing organic solid produced by low-temperature oxygen-limited pyrolysis of biomass. Studies have shown that applying biochar to the soil can delay the release of nutrients from fertilizers in the soil, reduce nutrient loss, and improve the utilization rate of fertilizer nutrients. It is a new type of fertilizer synergistic carrier. [0003] However, since the essence of the biochar preparation process is the high-temperature pyrolysis of organic matter, organic pollutants such as polycyclic aromatic hydrocarbons will inevitably be produced in this process. Combustion tests of rice straw, wheat straw and corn straw by Zhang et al. showed that both combustion residues and gases contained polycyclic aromatic hydrocarbons, and the emission paramete...
Claims
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Application Information
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