Vegetation-covered coastal wetland soil carbon reserve investigation method

Abstract

The invention relates to an intertidal zone mangrove forest, salt marsh and seaweed bed vegetation-covered coastal wetland soil carbon reserve investigation method, which comprises the following steps of layering and weighing collected columnar soil samples when estimating the carbon reserve, then taking out a first sample and a second sample from the samples in each layer, obtaining the dry weight of a sample containing fine roots by using the first sample and measuring the organic carbon / inorganic carbon / total carbon content of soil without fine roots, obtaining the total mass of the fine roots of each layer by using the second sample, subtracting the total weight of the fine roots from the total dry weight of the sample of each layer to obtain the mass of the sample soil, and further calculating the reserve of the organic carbon / inorganic carbon / total carbon in the soil. According to the method, the influence of plant fine roots in soil carbon reserve investigation is eliminated, the problem of repeated calculation of fine root organic carbon reserves in soil carbon reserve investigation is effectively avoided, and a more accurate investigation method is provided for research of coastal wetland carbon reserves.

Description

technical field [0001] The invention relates to the field of investigation of soil carbon storage in coastal wetlands, in particular to a method for investigating soil carbon storage in coastal wetlands covered by vegetation such as mangroves, salt marshes and seagrass beds. Background technique [0002] In recent years, the issue of carbon storage has increasingly become a frontier and hot issue in the field of global change and earth science research. Coastal wetlands have received extensive attention due to their rich carbon storage and strong carbon burial capacity. Soil carbon storage is an important content of carbon storage in wetland ecosystems, and it is the basic data for the establishment of soil carbon inventory in the country. The change of soil carbon storage can reflect the carbon storage potential of wetlands, the spatial distribution and distribution of carbon storage and carbon storage potential. Influencing factors, etc. are of great significance to the p...

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Problems solved by technology

[0003] However, the soil carbon storage survey method commonly used in the world generally includes the carbon stored in the fine root biomass in the calculation of soil carbon storage, which leads to the problem of overestimation of soil carbon storage.

On the other hand, coastal wetland ecosystem carbon storage is generally divided into soil and vegetation for calculation. For those coastal wetlands with well-developed underground root systems and a large number of plant fine roots, the root / fine root system is not considered when measuring soil carbon storage. root effects, which would lead to double counting of carbon stocks in fine roots