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Method for improvement of acid soil through use of rice husk charcoal

A technology of acidic soil and rice husk charcoal, applied in soil conditioning materials, chemical instruments and methods, soil material testing, etc., can solve the problems of hindering plant growth, accelerating the leaching of toxic metals, etc., to reduce the effectiveness and increase the available potassium The effect of high content and high efficiency

Inactive Publication Date: 2013-09-25
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And once the pH of the soil drops, the diseases and pests it brings will hinder the growth of plants
And the strong acid environment will also accelerate the leaching of toxic metals to the surrounding water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] This embodiment relates to a method for improving acidic soil with rice husk charcoal, said method comprising the following steps:

[0024] The first step is to obtain rice husk charcoal: the rice husk is obtained by rapid pyrolysis in a fluidized bed reactor at 550°C; this step can be realized by using existing technologies, such as using the fluidized bed rapid thermal Rice husk charcoal produced by cracking equipment;

[0025] The second step, soil collection: collect 0 ~ 20cm soil layer, and then evenly mix together. At the same time, take a small amount of soil and place it in an oven at 28-35°C to dry. Part of the soil sample is passed through a 2mm sieve before analysis, and then a small amount is passed through an 80-mesh sieve. The characteristics are: soil pH value is 3.33, soil total carbon content is 2.1%, total nitrogen is 0.22%, available phosphorus is 0.267mg / g, available potassium is 0.055mg / g, exchangeable aluminum is 1.327mg / g, calcium is 0.068mg / g g...

Embodiment 2

[0036] This embodiment relates to a method for improving acidic soil with rice husk charcoal, said method comprising the following steps:

[0037]The first step is to obtain rice husk charcoal: the rice husk is obtained by rapid pyrolysis in a fluidized bed reactor at 550°C; this step can be realized by using existing technologies, such as using the fluidized bed rapid thermal Rice husk charcoal produced by cracking equipment;

[0038] The second step, soil collection: collect 0 ~ 20cm soil layer, and then evenly mix together. At the same time, take a small amount of soil and place it in an oven at 28-35°C to dry. Part of the soil sample is passed through a 2mm sieve before analysis, and then a small amount is passed through an 80-mesh sieve. The characteristics are: soil pH value is 3.33, soil total carbon content is 2.1%, total nitrogen is 0.22%, available phosphorus is 0.267mg / g, available potassium is 0.055mg / g, exchangeable aluminum is 1.327mg / g, calcium is 0.068mg / g g,...

Embodiment 3

[0049] This embodiment relates to a method for improving acidic soil with rice husk charcoal, said method comprising the following steps:

[0050] The first step is to obtain rice husk charcoal: rice husk is produced by rapid pyrolysis in a fluidized bed reactor at 500°C. This step can be realized using existing technologies, such as using rice husk charcoal produced by the fluidized bed rapid pyrolysis device of Shandong Yineng Biological Co., Ltd.;

[0051] The second step, soil collection: collect 0 ~ 20cm soil layer, and then evenly mix together. At the same time, take a small amount of soil and place it in an oven at 28-35°C to dry. Part of the soil sample is passed through a 2mm sieve before analysis, and then a small amount is passed through an 80-mesh sieve; the characteristics are: soil pH value is 3.33, soil total carbon content is 2.1%, total nitrogen 0.22%; available phosphorus 0.267mg / g, available potassium 0.055mg / g, exchangeable aluminum 1.327mg / g, calcium 0.06...

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Abstract

The invention discloses a method for improvement of acid soil through use of rice husk charcoal. The method comprises the following steps: the first step, obtaining the rice husk charcoal through fast pyrolysis of rice husks in a fluidized bed reactor; the second step, collecting soil that is surface acidic soil in 0-20cm; the third step, mechanically mixing the rice husk charcoal and the soil uniformly, wherein the additive amount of the rice husk charcoal being greater than 1% and less than or equal to 4%; and the fourth step, maintaining that the soil moisture being 50 to 75% of the maximum water-holding capacity. In the method, the rice husk charcoal is added into the acid soil, the rice husk charcoal can significantly increase carbon storage in the soil, improve available potassium content in the soil, increase the content of trace elements of magnesium, manganese and the like in the soil, improve pH value of the soil, and reduce the effectiveness of heavy metal lead in a certain extent, thus causing no secondary pollution on the soil. The method of the invention has the advantages of simple method, energy conservation and emission reduction, low cost, high efficiency, and significant effect.

Description

technical field [0001] The invention relates to a method for improving acidity, in particular to a method for improving acidic soil with rice husk charcoal. Background technique [0002] my country's land area accounts for about 1 / 15 of the world's land area, but the total soil organic carbon pool only accounts for 1 / 30 of the world's total, so my country is a country with low soil organic carbon. From the 1950s to the early 1980s, due to the rapid growth of population, a large area of ​​natural soil was reclaimed, and the soil in my country was generally characterized by the consumption of natural soil organic carbon rich in organic carbon. In the Northeast and Northwest, the organic carbon of meadow steppe soil or steppe soil rich in organic carbon decreased by 9-30g / kg after reclamation. In addition, because the soil stores up to 1500 Pg of organic carbon (SOC), which is three times the atmospheric carbon pool and about 2.5 times the terrestrial biomass, the CO emitted b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24C09K17/40C09K101/00
Inventor 刘荣厚王燕
Owner SHANGHAI JIAO TONG UNIV
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