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Method for grouping organic carbons in soil by combing physics and chemistry

A grouping method and combined technology, applied in the direction of soil material testing, material inspection products, etc., can solve problems such as chemical structure damage, and achieve the effect of improving the overall understanding

Active Publication Date: 2018-09-28
NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that there is overlap between the soil organic carbon components obtained by a single grouping technique, and the chemical structure is destroyed, and a physical-chemical combined soil organic carbon grouping method is proposed.

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  • Method for grouping organic carbons in soil by combing physics and chemistry
  • Method for grouping organic carbons in soil by combing physics and chemistry

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specific Embodiment approach 1

[0012] Specific implementation mode 1. Combination figure 1 Illustrate a kind of physical-chemical combination soil organic carbon grouping method of this embodiment, it comprises the following steps:

[0013] Step 1. Immerse a soil sieve with a pore size of 53 μm in distilled water at room temperature, weigh 100 g of an air-dried soil sample passed through an 8 mm sieve, place the soil sample on the soil sieve in distilled water, soak the soil sample in distilled water for 10 minutes, and then Swing up and down 50 times within 2 minutes, with a swing range of 3 cm. The soil components remaining on the soil sieve are soil aggregates > 53 μm, and the soil components passing through the soil sieve are soil aggregates < 53 μm.

[0014] Step 2: Divide the soil aggregates >53 μm on the soil sieve into two parts (soil sample A and soil sample B), wash them into plastic beakers respectively, and add 100 mL of distilled water into the beakers. Soil sample B was ultrasonically treated...

Embodiment 1

[0024] In this example, a soil organic carbon grouping method combining physics and chemistry is used to group the soil organic carbon components of the black soil in the northeastern farmland. The specific operation steps are as follows:

[0025]Soak a soil sieve with a pore size of 53 μm in distilled water at room temperature, weigh 100 g of an air-dried soil sample passed through an 8 mm sieve, place the soil sample on the soil sieve in distilled water, soak the soil sample in distilled water for 10 minutes, and then move it up and down within 2 minutes Swing 50 times with a swing amplitude of 3 cm. The soil components remaining on the soil sieve are soil aggregates > 53 μm, and the soil components passing through the soil sieve are soil aggregates < 53 μm.

[0026] After the soil aggregates >53 μm on the soil sieve were divided into two parts (soil sample A and soil sample B), they were rinsed into plastic beakers respectively, and 100 mL of distilled water was added to th...

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Abstract

The invention discloses a method for grouping organic carbons in soil by combing physics and chemistry and relates to a grouping method of the organic carbons in soil. The invention aims at solving the problem that in the prior art, physics grouping or chemistry grouping is used alone in the stability study of the organic carbons in soil so that the stability of the organic carbons in soil cannotbe determined accurately. The method comprises the steps that an air-dried soil sample is subjected to wet sieving and divided into a soil aggregate with the pore diameter larger than 53 micrometers and a soil aggregate with the pore diameter smaller than 53 micrometers; the soil aggregate with the pore diameter larger than 53 micrometers is divided into two parts, one part is dried and then saved, and the other parts is destroyed by an ultrasonic crusher, so that the soil aggregate with the pore diameter larger than 53 micrometers and an occluded soil aggregate with the pore diameter smallerthan 53 micrometers are obtained; the soil aggregate with the pore diameter smaller than 53 micrometers is divided into two parts, one part is dried and then saved, and the other part is subjected tocentrifugalization, so that free powder particles and free clay particles are obtained; the free powder particles are subjected to an ultrasonic treatment to obtain powder particles and occluded clayparticles; a part of the soil is disposed with a KCl solution to remove chemical protection mechanisms such as calcium and magnesium.

Description

technical field [0001] The invention relates to a physical-chemical combination soil organic carbon grouping method. Background technique [0002] Soil organic carbon is not only central to soil fertility but also an important component of the global carbon cycle. It is estimated that the organic carbon pool in the depth of 1m in the global soil surface is about 1500Pg, which is 3 times of the atmospheric carbon pool and 2-4 times of the terrestrial vegetation carbon pool. Soil organic carbon is composed of a series of complex organic matter with different physical and chemical properties. The stability of different components is different, the degree of decomposition, the difficulty of mineralization and the response to environmental changes are also different. Among them, active organic carbon components are sensitive to external disturbances and can quickly respond to dynamic changes in soil organic carbon, while stable organic carbon components have a slower turnover ra...

Claims

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Application Information

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IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 禹朴家范高华
Owner NORTHEAST INST OF GEOGRAPHY & AGRIECOLOGY C A S
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