Soil salinity determining method based on continuum removal method

Abstract

The invention relates to a soil salinity determining method based on a continuum removal method. The soil salinity determining method comprises the following steps: (1) collecting and processing a soil sample; (2) testing the salt content of the soil sample; (3) carrying out spectrum test on the soil sample to obtain the actual reflection spectral data of the soil sample; (4) processing the spectral data and extracting absorption characteristic parameters; (5) processing the spectral index; (6) carrying out model building and precision evaluation. The soil salinity determining method based on the continuum removal method, disclosed by the invention, is simple and reasonable in operating steps and low in cost and has the advantages that the real situation of soil salinization can be effectively reflected and a new acquiring way is provided for decision bases of salinization evaluation, improvement and control and plant structure adjustment of cultivated soil, thus the soil salinity determining method is suitable for popularization and application.

Description

technical field [0001] The invention relates to the technical field of soil salinity monitoring, in particular to a method for measuring soil salinity based on a continuum removal method. Background technique [0002] Salinization is one of the main types of desertification and land degradation. The total area of ​​saline soil in my country is about 3600×10 4 hm 2 , accounting for 4.88% of the country's usable land area, and the salinized area of ​​cultivated land reached 920.9×10 4 hm 2 , accounting for 6.62% of the country's cultivated land area. Therefore, the management and improvement of salinized cultivated land, the adjustment of planting structure, and the rational development and utilization of salinized natural soil resources play a vital role in the sustainable development of agriculture in my country. The fundamental basis for making and implementing these decisions is soil salinization information. How to quickly, accurately and inexpensively obtain dynamic...

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Problems solved by technology

[0004] The present invention aims to solve the problems of time-consuming, labor-intensive and cost-intensive measurement methods of existing soil salinity, and it is impossible to reflect the real situation of large-area soil salinization due to the lack of measuring points, and proposes a simple, convenient and low-cost method , can effectively reflect the real situation of soil salinization, and can provide a new way to obtain the soil salinity determination method based on the continuum removal method for the evaluation, improvement, management, and decision-making basis of planting structure adjustment of cultivated soil salinization

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