Hyperspectral remote-sensing monitoring method for wetland soil nitrification microbial community

Abstract

The invention discloses a hyperspectral remote-sensing monitoring method for a wetland soil nitrification microbial community. The method comprises the following steps: measuring wetland soil spectrum and nitrification microorganisms in a monitoring area; pretreating hyperspectral remote-sensing images, wherein format conversion, absolute radiance value conversion, atmospheric correction and geometric precise correction are performed; building a model based on the experimental measurement spectrum, and estimating the quantity of the wetland soil nitrification microorganisms in the monitoring area with the model; estimating the quantity of the wetland soil nitrification microorganisms based on the pretreated hyperspectral remote-sensing images; confirming the optimal value of the quantity of the wetland soil nitrification microorganisms based on a cost function. The method has the benefits that the distribution of the nitrification microorganisms on a regional scale can be extracted, so that obtaining of the time-space evolution characteristics of soil nitrification and the driving factor information can be facilitated, and a scientific basis is provided for correct understanding of the wetland nitrogen cycle process and influence mechanism, and the wetland pollution purification function.

Description

technical field [0001] The invention relates to a hyperspectral remote sensing monitoring method for wetland soil nitrifying microbial communities, belonging to the field of remote sensing technology applications. Background technique [0002] Nitrogen cycle is a material cycle that describes the mutual transformation process between elemental nitrogen and nitrogen-containing compounds in nature, and is one of the core processes of element cycle in soil ecosystems, among which nitrification is of great significance to the nitrogen cycle of soil. Nitrification is an intermediate link connecting nitrogen fixation and denitrification, and it is related to the degree of nitrogen utilization by plants, soil acidification, water pollution and the greenhouse gas nitrous oxide (N 2 O) A series of ecological and environmental issues such as release are directly related. Therefore, nitrification is a central link in the nitrogen biogeochemical cycle. [0003] Nitrification is a reac...

AI Technical Summary

Problems solved by technology

Most of this kind of research is carried out on some specific sites sporadically, and it is difficult to obtain the changes in the distribution of microbial communities on a regional scale.

Moreover, the regional ecological effects of microbial communities take a long time to manifest, and it is difficult to give accurate estimates and evaluations only based on short-term monitoring

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