Biochar-based selenium-rich fertilizer used for camellia sinensis

A biochar, selenium-enriched technology, applied in biofuels, organic fertilizers, fertilizer mixtures, etc., to improve soil acidification, reduce heavy metal pollution, and optimize soil structure

Inactive Publication Date: 2018-01-16
ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above problems, the present invention provides a biochar-based selenium-enriched fertilizer for tea trees that has high selenium content and can improve soil acidification, enhance soil water retention, etc., and also reduce and prevent soil heavy metal pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A biochar-based selenium-enriched fertilizer for tea trees, which is composed of selenium-enriched biochar, selenium-enriched organic fermented fertilizer, super absorbent polymer and quartz sand, wherein the content of selenium-enriched biochar is 40wt%, and the content of selenium-enriched organic fermented fertilizer The content is 30 wt%, the content of the superabsorbent polymer is 3wt%, and the quartz sand is 27wt%; the superabsorbent polymer is sodium polyacrylate, and the particle size of the quartz sand is 30 mesh;

[0037] Selenium-enriched organic fermented fertilizer is made from pig manure fermented by selenium-enriched yeast;

[0038] Selenium-enriched biochar is prepared by reacting tea branch biochar and selenium amino acid at 70°C with concentrated sulfuric acid as a catalyst for 1 hour. Under drying, the aqueous solution is a potassium ion aqueous solution, and the concentration of potassium ions in the aqueous solution is 1mol / L; the selenoamino acid ...

Embodiment 2

[0044]A biochar-based selenium-enriched fertilizer for tea trees, which is composed of selenium-enriched biochar, selenium-enriched organic fermented fertilizer, super absorbent polymer and quartz sand, wherein the content of selenium-enriched biochar is 50wt%, and the content of selenium-enriched organic fermented fertilizer The content is 40 wt%, the content of superabsorbent polymer is 8wt%, and the content of quartz sand is 2wt%; the superabsorbent polymer is starch acrylonitrile graft copolymer, and the particle size of quartz sand is 60 mesh;

[0045] Selenium-enriched organic fermented fertilizer is made from kitchen waste fermented by selenium-enriched yeast;

[0046] Selenium-enriched biochar is prepared by reacting tea branch biochar and selenized amino acid at 100°C with concentrated sulfuric acid as a catalyst for 3 hours. Under drying, the aqueous solution is a sodium ion aqueous solution, and the concentration of sodium ions in the aqueous solution is 3mol / L; the...

Embodiment 3

[0052] A biochar-based selenium-enriched fertilizer for tea trees, which is composed of selenium-enriched biochar, selenium-enriched organic fermented fertilizer, super absorbent polymer and quartz sand, wherein the content of selenium-enriched biochar is 45wt%, and the content of selenium-enriched organic fermented fertilizer The content is 35 wt%, the content of superabsorbent polymer is 5wt%, and the content of quartz sand is 15wt%; the superabsorbent polymer is starch acrylonitrile graft copolymer, and the particle size of quartz sand is 40 mesh;

[0053] Selenium-enriched organic fermented fertilizer is made from organic waste fermented by selenium-enriched yeast;

[0054] Selenium-enriched biochar is prepared by reacting tea branch biochar and selenized amino acid at 80°C with concentrated sulfuric acid as a catalyst for 1.5 hours. Under drying, the aqueous solution is potassium ion aqueous solution and sodium ion aqueous solution, the total concentration of potassium io...

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Abstract

The invention belongs to the technical field of a fertilizer. The invention discloses a biochar-based selenium-rich fertilizer used for camellia sinensis. The fertilizer comprises 40-50 wt% of selenium-rich biochar, 30-40 wt% of a selenium-rich food waste fermented fertilizer, and 3-8 wt% of super-absorbent polymer, with the balance being quartz sand. The selenium element exists in an organic selenium manner, so that in production, processing and application processes, the selenium element is minimum harmful to related persons. The problem that after a selenium-rich fertilizer in the prior artis applied, the selenium content in soil is uneven, crops, such as camellia sinensis, have absorption obstacles, and the utilization rate is not high is overcome. The selenium-rich fertilizer is noteasy to be dissolved in water, and doesn't lose efficacy after being flushed with rain/irrigation water. The selenium-rich fertilizer can improve soil acidification, optimizes soil structure, improvessoil quality, and has the function of clearing, mitigating, and passivating heavy metal in soil.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a biochar-based selenium-enriched fertilizer for tea trees. Background technique [0002] Selenium (Se) is a trace element with a molecular weight of 78.96. It is located in the VIA group of the chemical element periodic table, and its chemical properties are similar to the sulfur element of the same group. The current general view is that an appropriate amount of selenium in the diet plays an important role in maintaining the health of the human body. First of all, selenium plays an irreplaceable role in improving the body's antioxidant capacity. In addition, selenium also has important physiological functions such as anti-cancer, liver protection, binding heavy metals, and prevention and treatment of cardiovascular diseases. At the same time, selenium deficiency is also an important cause of human Kashin-Beck disease and Keshan disease. [0003] As an important trace ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04C05F17/00C10B53/02C05G3/80
CPCY02E50/10Y02W30/40
Inventor 吕豪豪杨生茂钟哲科汪玉瑛刘玉学何莉莉
Owner ZHEJIANG ACADEMY OF AGRICULTURE SCIENCES
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