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Compound biochar-based slow-release fertilizer and application method thereof

A technology of biochar and slow-release fertilizer, which is applied in the fields of combined biological treatment, fertilizer made from biological waste, and land preparation methods, etc. The effect of product quality

Inactive Publication Date: 2017-03-22
BENGBU COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Biochar-based fertilizers have a certain ability to adsorb and solidify mercury ions, but the effect is minimal. How to further improve the solidification level of mercury ions under the premise of utilizing the fertilizer effect of biochar-based fertilizers is a difficulty for researchers in this field and focus

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Example 1: A composite biochar-based slow-release fertilizer

[0053] Prepared by the following method:

[0054] 1. Mix agricultural rice stalks and sawdust at a weight ratio of 1:1, dry, crush, pass through a 10-mesh sieve, dry at 65℃ for 2 days, 700℃ limited oxygen pyrolysis for 3h, and grind through 80-mesh sieve. Biochar; add sodium selenite at a weight ratio of 2.0% to the biochar, mix well and age for 2 days;

[0055] Step 2: Manure base fertilizer

[0056] 2. Mix dry pig manure and dry chicken manure at a weight ratio of 1:1 to obtain mixed dry manure; add 35% water, 10% wheat bran, 10% grass meal, 0.3% by weight to the mixed dry manure. % Add em bacteria liquid, stir evenly, pile into a rectangular material pile with a height of about 1 meter and a width of 2 meters, and perforate on the top of the pile to ventilate, pile and retreat at 40℃ for 3 days; add 18% of the total material weight to weathered coal rot Mix acid and 7% phosphate fertilizer, mix the pile, and ve...

Embodiment 2

[0060] Example 2: A composite biochar-based slow-release fertilizer

[0061] Prepared by the following method:

[0062] 1. Mix agricultural rice stalks and sawdust at a weight ratio of 1:1, dry, crush, pass through a 20-mesh sieve, dry at 60℃ for 24h, 600℃ limited oxygen or anaerobic pyrolysis for 4h, grind through a 60-mesh sieve , Get biochar; add sodium selenite at a weight ratio of 2.5% to the biochar, mix well and age for 2 days;

[0063] 2. Mix dry pig manure and dry chicken manure at a weight ratio of 1:1 to obtain mixed dry manure; add 40% water, 12% rice bran, 12% peat, and 0.4% to the mixed dry manure by weight. Stir the em bacteria liquid evenly and pile it into a rectangular material pile with a height of about 1 meter and a width of 2 meters. The top of the pile shall be ventilated and piled at 45°C for 2 days; add weathered coal humic acid at 15% by weight of the total material , 3.5% phosphate fertilizer, mix well and pile up, and ventilate on the top of the pile, he...

Embodiment 3

[0065] Example 3: Field application experiment using a composite biochar-based slow-release fertilizer prepared as in Example 2

[0066] Test materials:

[0067] The tested rice variety is Fuyou 325;

[0068] The test fertilizer was the slow-release fertilizer granules prepared in Example 2.

[0069] Overview of the test field:

[0070] The test site was a farmer’s rice field in Wazhang Village, Yanshan Township, Bengbu City, Anhui Province.

[0071] Experiment grouping

[0072] Control group: Farming and fertilizing were carried out using the usual methods of farmers in previous years.

[0073] Experimental group: The slow-release fertilizer particles described in Example 2 were applied at a base rate of 256 kg / mu, and the soil surface layer was plowed at a depth of 0-20 cm to mix the controlled-release fertilizer particles with the soil. After the rice was planted, The soil moisture retention standard is 70% to 80% of the measured value of field water holding capacity, and nitrogen and ...

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Abstract

The invention discloses compound biochar-based slow-release fertilizer and an application method thereof and mainly relates to the field of biochar-based fertilizer. A preparation method of the compound bio-carbon-based slow-release fertilizer comprises mixing agricultural rice straws and wood shavings, preparing char, adding sodium selenite into the char to obtain biochar, mixing pig manure and chicken manure, carrying out fermentation on the pig manure and chicken manure, carrying out metal passivation treatment to obtain manure-based fertilizer, further fermenting the biochar and the manure-based fertilizer, and adding diatomite into the fermentation product for modification to obtain slow release fertilizer granules. In use, preferably, the slow-release fertilizer granules are applied to the field according to a ratio of 256 kg per mu, and a field moisture capacity measured value is kept in a range of 70% to 80% in the whole growth period. The compound biochar-based slow-release fertilizer can meet the demand of nitrogen and phosphorus in the early stage and the whole period of rice seedling, has sufficient and lasting fertilizer effects, prevents the effects of heavy metals, improves the soil environment, inhibits methylmercury, and can produce high-yield good-quality selenium-rich rice.

Description

Technical field [0001] The invention relates to the field of biochar-based fertilizers, in particular to a composite biochar-based slow-release fertilizer and an application method. Background technique [0002] Biochar usually refers to a carbon-rich product formed by pyrolysis of agricultural and forestry waste and other biomass under hypoxia and certain temperature conditions. In the environmental field, biochar is mainly used to solve the straw burning problem, reduce non-point source pollution, and realize agricultural "carbon sequestration"; in the agricultural field, it is mainly used to improve soil, improve fertility, restore farmland, and increase crop yield and quality. [0003] Nowadays, my country’s farmland is overwhelmed, and the arable land has been repeatedly occupied, and the quality has dropped sharply; climate change and predatory over-utilization have severely degraded the fertile soil of the past: the organic matter content has decreased, the black soil layer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05G3/00C05F17/00A01B79/02C05G3/80
CPCA01B79/02C05D9/00C05F17/50C05G3/00C05G3/80C05G5/12C05F3/00C05F5/002C05F11/00C05F11/02C05F11/08Y02W30/40
Inventor 朱兰保盛蒂
Owner BENGBU COLLEGE
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