Method for dynamically determining content of reed-litter organic matter transferred to soil

Abstract

The invention provides a method for dynamically determining the content of reed-litter organic matter transferred to soil, and belongs to the field of wetland ecosystems.Multiple vessels are put outdoors, the vessels are filled with soil, the moisture content in the soil is adjusted according to riverside wetland hydrological dynamics, and simulated wetland water ecosystems are constructed; the ratio of the soil surface area and unit area in each vessel is calculated according to the leaf litter situation of reed plants in unit area, and litters are periodically added to the surface layers of the vessels; stratified sampling is conducted on the vessels according to predetermined time intervals, content changes of the organic matter in the soil are monitored, and therefore dynamic changes of the content of the litter organic matter, transferred to the soil, of a target reed community is determined.According to the method for dynamically determining the content of the reed-litter organic matter transferred to the soil, the transfer amount of carbon in the litters of riverside wetland reeds of the down stream of Changjiang River can be accurately obtained, and a theoretical basis and practical value are provided for research of wetland carbon circulation.

Description

Technical field: [0001] The invention relates to a method for measuring the content of organic matter transferred to soil in reed litter, which belongs to the category of wetland ecosystem classification. Background technique: [0002] As an important part of the carbon cycle of terrestrial ecosystems, although wetlands only account for a small part of the land surface area, 2%-6%, their carbon pools account for 18%-30% of the total terrestrial carbon pools. Wetlands are important carbon "sinks" in terrestrial ecosystems due to their high productivity and low decomposition rate of organic matter. While wetlands can absorb carbon dioxide from the atmosphere and fix it, they are also a significant source of the greenhouse gas methane. The organic carbon of wetland soil is a sensitive indicator of climate change, which can be used to indicate the response of wetland to climate change. Therefore, wetlands play an important role in controlling the carbon cycle of terrestrial ec...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the existing shortage of monitoring the amount of organic matter transfer in litter and determine the content of organic matter transferred to soil per unit area of ​​reed litter during the entire growth period, the present invention simulates the litter dynamics and hydrological environment of reed litter and regularly presses The amount of leaf litter of reed plants per unit area is added to the soil, and the content of soil organic matter is dynamically measured, so as to determine the content of organic matter transferred from reed litter to the soil per unit area during the entire growth period of reeds, and provide a basis for further research on wetland carbon cycle

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