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Method for estimating soil organic carbon in karst area

An organic carbon and karst technology, applied in the field of soil carbon content calculation in karst areas, which can solve problems such as large calculation errors

Active Publication Date: 2019-08-27
INST OF GEOCHEM CHINESE ACADEMY OF SCI
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for estimating soil organic carbon in karst areas, so as to solve the problem that the calculation of soil organic carbon in karst areas in the prior art has a karst soil carbon pool that is much higher than the real actual situation, resulting in large calculation errors other technical issues

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  • Method for estimating soil organic carbon in karst area
  • Method for estimating soil organic carbon in karst area
  • Method for estimating soil organic carbon in karst area

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Embodiment Construction

[0031] The method provided by the invention comprises the steps of:

[0032] A method for estimating soil organic carbon in karst areas, which includes:

[0033] Step 1. Establish a soil organic carbon estimation model in karst areas;

[0034] Step 2, correcting the soil depth;

[0035] Step 3. Deduction of bedrock exposure rate for different soil types and positive and negative topography;

[0036] Step 4. Correct the estimation formula of soil organic carbon density for different soil types and positive and negative topography;

[0037] Step 5. Correct the estimation method of soil organic carbon storage.

[0038] In the step 1, the following method is used for calculation:

[0039]

[0040] SOCD ij =SOCD 非喀斯特 +SOCD 喀斯特

[0041] SOCD 喀斯特 =SOCD 6°以下非石灰土 +SOCD 6°以下石灰土 +SOCD 6°以上所有土壤类型

[0042]

[0043] In the formula: In the formula: SOCS is the soil organic carbon storage (g C), SOCD is the organic carbon density (kg / m 2 ), C i is soil organic carbon cont...

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Abstract

The invention discloses a method for estimating the soil organic carbon in a karst area. The method comprises the steps of: 1, establishing an estimation model of the soil organic carbon in the karstarea; 2, modifying the soil depth; 3, deducting the bedrock exposing rate of different types of soil and positive and negative landforms; 4, modifying soil organic carbon density (SOCD) estimating formulas of the different types of soil and the positive and negative landforms; and 5, modifying a soil organic carbon storage (SOCS) estimating method. The method has the beneficial effects that the technical problems that the carbon content of karst soil carbon pools is significantly higher than the actual situation, the calculation error is large and the like during the soil organic carbon calculation in the karst area in the prior art are solved.

Description

technical field [0001] The invention belongs to the field of soil carbon content calculation in karst areas, in particular to a method for estimating soil organic carbon in karst areas. Background technique [0002] Due to the particularity of soil distribution in karst areas, the surface is broken, the soil is shallow, the distribution is uneven, the soil cover is discontinuous, and the bedrock exposure rate is high. The in-depth understanding of the spatial distribution characteristics of soil organic carbon density and reserves is directly related to karst rocky desertification. Regional ecological restoration and reconstruction program planning and ecological system layout have a major impact on environmental and ecological civilization suggestions and decisions, and pose a major challenge to ensuring the ecological security of the Yangtze River and Pearl River Basin. However, the estimation method of soil organic carbon density in the prior art cannot truly reflect the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24G06F17/50
CPCG01N33/24G06F30/367G06F30/17
Inventor 白晓永吴路华周苗陈飞李汇文操玥肖建勇钱庆欢曾成李琴王金凤田义超罗光杰杨钰杰李朝君邓元红胡泽银
Owner INST OF GEOCHEM CHINESE ACADEMY OF SCI
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