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Method for evaluating decomposition temperature sensitivity of soil carbon bank

A technology for decomposing temperature and sensitivity, applied in the field of soil environmental governance, can solve problems such as unclear impact mechanism, and achieve the effect of reducing system errors

Active Publication Date: 2020-04-24
CHONGQING THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the mechanism by which biochar affects soil carbon pools, especially inert carbon pools, remains unclear

Method used

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  • Method for evaluating decomposition temperature sensitivity of soil carbon bank
  • Method for evaluating decomposition temperature sensitivity of soil carbon bank
  • Method for evaluating decomposition temperature sensitivity of soil carbon bank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0060] The site of the experiment in this example is located at the Shenyang Ecological Station of the Chinese Academy of Sciences in Shenyang City. Long-term bare land (bare allow) and abandoned (fallow) test soils are treated manually. The long-term bare land is artificially managed to ensure no plant growth and no carbon input for 25 years. ; Weeds grow naturally in long-term abandoned land, maintaining continuous plant carbon input for 25 years. The basic physical and chemical properties of the soil are listed in Table 1.

[0061] Table 1 Soil samples and plot description

[0062]

[0063] A method for assessing the temperature sensitivity of biochar to the decomposition of active and inert carbon pools, comprising the following steps:

[0064] 1. Air-dry the soil samples of abandoned land (active carbon pool), bare land (relatively inert carbon pool) and soil samples cultivated in bare land (inert carbon pool) for two years and then pass through a 2mm sieve. Corn sta...

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Abstract

The invention discloses a method for evaluating the decomposition temperature sensitivity of a soil carbon bank. The method comprises the steps of (1) uniformly mixing different types of soil with biochar respectively, and putting the mixture into a culture bottle; 2) keeping the water content of the sample constant in the whole culture process by using a weighing method; (3) putting the sample and the opening of a small bottle containing alkali liquor into a non-transparent screw sealing bottle, and (4) putting the sealing bottle into two thermostats with different temperatures to be culturedin a dark place, and finally calculating the soil respiration CO2-C content. By adopting the method, the influence of the addition of the charcoal on the decomposition of the active and inert carbonbanks can be known.

Description

technical field [0001] The invention belongs to the technical field of soil environment control, and relates to a method for evaluating the temperature sensitivity of soil carbon pool decomposition. Background technique [0002] Soil is the largest carbon pool in terrestrial ecosystems, and its small changes can affect atmospheric carbon dioxide (CO 2 ) concentration had a significant effect (Kirschbaum, 2000). However, the vast majority of soil carbon pools are organic carbon soil organic carbon pools (SOC), which are composed of various carbon pools with different compositions and different stabilities (Karhu et al., 2010). According to their activity, they can be divided into active carbon pools and inert carbon pools (Wang et al. 2019). The active carbon pool is mainly composed of soil microbial biomass and easily decomposable organic matter. The inventory is small and the turnover time is short (0.1-5 years), and its changes have little impact on the global carbon cyc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/00
CPCG01N25/00
Inventor 林俊杰陈茜刘丹周爽张帅颜畅张龙李廷真余卓霖向晓琴吕钰楠张祥梅
Owner CHONGQING THREE GORGES UNIV
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