Multiscale analysis method for vegetation indexes of refuse dump and soil nutrient space

Abstract

The invention discloses a multiscale analysis method for a vegetation index of a refuse dump and soil nutrient space. In the method, a normalized difference vegetation index (NDVI) is selected as an index of vegetation condition, a pH value, organic matters, NH4N, rapid available phosphorus and rapid available potassium are selected as indexes of soil nutrients, the six indexes are subjected to wavelet six-scale decomposition and reconstruction so as to obtain wavelet approximate reconstruction information of various indexes on different space scales; a partial correlation coefficient of wavelet approximate reconstruction information of NDVI and the wavelet approximate reconstruction information of each index of the soil nutrients on different space scales is respectively calculated; and correlationships of the NDVI and the soil nutrients on different space scales are analyzed. The method can analyze the relationships of the NDVI and the soil nutrients on different space scales, and is favorable for comprehensively understanding relationships of ecological factors of the refuse dump on different space scales and determinants for spatial variability of the NDVI on different scales.

Description

technical field [0001] The invention relates to the field of relationship between vegetation and soil in a dump site, in particular to a multi-scale analysis method for a dump site vegetation index and soil nutrient space based on wavelet analysis. Background technique [0002] Dump site refers to the place where mining waste is discharged intensively. Mining refers to open-pit and underground mining, including surface stripping and shaft development during mine infrastructure; discharges generally include humified topsoil, weathered rock, hard rock, and mixed rock, and sometimes off-surface minerals that may be recovered , lean ore, etc. The dump site is a complex ecosystem. The invasion of wild plants and vegetation succession lead to the diversity of the ecosystem and make the ecosystem more complex. The Fuxin Haizhou dump has a large area, and different plots have different dumping periods, which further exacerbates the complexity of the Haizhou dump ecosystem. The ec...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a multi-scale analysis method for dump vegetation index and soil nutrient space, so as to solve the defect that there is no scale effect in the research on the relationship between dump vegetation and soil nutrients in the prior art

Images