A method for indirect determination of soil heterotrophic respiration and autotrophic respiration rate in Phyllostachys pubescens

A technology of respiration rate and measurement method, which is applied in the field of indirect measurement of soil heterotrophic respiration and autotrophic respiration rate in Moso bamboo forest, can solve problems such as poor reliability, and achieve low measurement cost, high accuracy and reliability, and instrument Effects with low technical requirements for configuration and operation

Active Publication Date: 2021-10-15
ZHEJIANG FORESTRY UNIVERSITY
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  • Description
  • Claims
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Problems solved by technology

[0005] The present invention aims at the poor reliability of estimating the forest soil respiration rate by only using the soil water-soluble carbon content in the prior art and using the direct method to measure the heterotrophic respiration and autotrophic respiration rate of the moso bamboo forest soil, at least 6 months in advance Shortcomings of pretreatment by trenching method, an indirect method for measuring soil heterotrophic respiration and autotrophic respiration rate in Phyllostachys pubescens forest is provided, the method selects soil temperature, soil water content, soil water-soluble organic carbon content, soil microbial biomass carbon content and soil β-glucosidase activity five indicators to indirectly measure the soil heterotrophic respiration and autotrophic respiration rate of Phyllostachys pubescens, the result is reliable, and it is different from the traditional assay method of distinguishing soil respiration components, and the present invention does not need a long time The heterotrophic respiration and autotrophic respiration rate of Moso bamboo forest soil can be directly measured by pretreatment, which is convenient and fast

Method used

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  • A method for indirect determination of soil heterotrophic respiration and autotrophic respiration rate in Phyllostachys pubescens
  • A method for indirect determination of soil heterotrophic respiration and autotrophic respiration rate in Phyllostachys pubescens
  • A method for indirect determination of soil heterotrophic respiration and autotrophic respiration rate in Phyllostachys pubescens

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A kind of indirect measuring method of moso bamboo forest soil heterotrophic respiration and autotrophic respiration rate, comprises the following steps:

[0039] (1) Select the sample plot: select the moso bamboo forest sample plot according to the dimension, altitude, slope aspect and light, establish a sampling plot in the moso bamboo forest plot, and carry out a one-year measurement work. The length and width of the sampling plot are 20m×20m;

[0040] (2) Measurement of soil respiration rate: measure the total respiration rate of moso bamboo forest soil and the heterotrophic respiration rate of moso bamboo forest soil in the field;

[0041] The total soil respiration rate of Moso bamboo forest and the soil heterotrophic respiration rate of Moso bamboo forest were measured by LI-8100 carbon flux measurement system, and then the total soil respiration rate of Moso bamboo forest was subtracted from the soil heterotrophic respiration rate of Moso bamboo forest to obtain ...

Embodiment 2

[0067] Utilize the assay method of step (3) in the embodiment 1 to measure soil temperature, soil water content, soil water-soluble organic carbon content, soil microbial biomass carbon content and soil β-glucosidase activity, measurement cycle is 4 months, obtains The results are shown in Table 2.

[0068] The numerical value of each index of the Moso bamboo forest soil that table 2 embodiment 2 measures

[0069]

Embodiment 3

[0073] The numerical value in table 2 is substituted in the functional relational expression that embodiment 1 obtains: Y 异养呼吸 =0.12X 1 -0.15X 2 +0.017X 3 -0.017X 4 +0.017X 5 +6.16 and Y 自养呼吸 =0.030X 1 +0.021X 2 -0.0019X 3 +0.016, calculated the soil heterotrophic respiration and autotrophic respiration rate of Moso bamboo forest, and analyzed the relative deviation with the results obtained in Comparative Example 1. The results are shown in Table 3.

[0074] Table 3 Comparison of heterotrophic respiration and autotrophic respiration rates in Moso bamboo forest soil in Example 2 and Comparative Example 1

[0075]

[0076] It can be seen from Table 3 that the relative deviations of the indirect measurement method provided by the present invention and the measurement results obtained by the LI-8100 soil carbon flux measurement system are all less than 10%. Therefore, the reliability of the indirect measurement method provided by the invention is good, and the inventi...

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Abstract

The invention relates to the field of soil respiration component measurement in soil ecosystem carbon cycle research, discloses a kind of indirect measurement method of moso bamboo forest soil heterotrophic respiration and autotrophic respiration rate, comprising the following steps: (1) selecting sample plot; 2) Determination of soil respiration rate; (3) collecting soil samples and measuring soil sample parameters; (4) establishing a linear relationship; (5) measuring soil related parameters, and calculating soil heterotrophic respiration and autotrophic respiration rates in moso bamboo forests. The present invention selects 5 factors to establish the indirect measurement method of soil heterotrophic respiration and autotrophic respiration rate, compared with the method of directly measuring soil respiration components by using the LI-8100 carbon flux measurement system commonly used at present, the range of numerical deviation is relatively large. Small (plus or minus deviation within 10%), and this indirect measurement method has the advantages of less field work, lower measurement cost, and lower requirements for instrument configuration and operation technology.

Description

technical field [0001] The invention relates to the field of soil respiration component measurement in soil ecosystem carbon cycle research, and in particular relates to an indirect method for measuring soil heterotrophic respiration and autotrophic respiration rate in Moso bamboo forest. Background technique [0002] Moso bamboo is the main species of bamboo in the subtropical zone of my country, and is an important plantation resource in southern China. The area of ​​moso bamboo forest in China reaches 4.4474 million hectares, accounting for about 36% of the world's moso bamboo forest area. Moso bamboo has the advantages of fast growth and rapid biomass accumulation. Therefore, the moso bamboo forest ecosystem has great advantages in increasing sinks, reducing emissions and coping with global climate change. The study of soil respiration and its changes in Moso bamboo plantation will have far-reaching significance on the global carbon balance. [0003] Soil respiration i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/24
Inventor 李永夫李永春蔡延江宋余泽陆鑫华姜培坤周国模
Owner ZHEJIANG FORESTRY UNIVERSITY
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