Research on Soil Environmental Quality and Planting Suitability Evaluation of Cuilan Producing Area in Yuexi, Anhui Province
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Graphical Abstract
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Abstract
This paper selected Laibang area of Yuexi County as the research area. Surface soil samples were collected at a density of 8 points/km2.Twenty-one elements of Cd, Hg, As, Se, etc were analyzed. Taking the land use status map as the evaluation unit, the work carried out soil environmental quality assessment. Based on the analytic hierarchy process, nine evaluation indexes such as soil pH, soil texture, soil type, soil fertility, soil environmental quality, slope, aspect, elevation and lithology were selected to construct suitable conditions of Yuexi Cuilan Planting suitability evaluation system. The suitability evaluation of Yuexi Cuilan was carried out by using fuzzy comprehensive evaluation method. The suitability evaluation of Cuilan planting was evaluated by using 1:25 million land quality geochemical data. The results showed that the soil environment quality in the work area was good, and the comprehensive soil environmental quality was lower than the risk screening value, accounting for 97.14%. The main risk factors are Ni, Cr and Cu. The most suitable planting area is 11.51 km2 and the less suitable is 21.66 km2, which is about 31.2% and 58.72% of the total area. The highly suitable areas are mainly distributed in Baojia Township, Diandian Town, Toutuo Town, Laibang Town and Hetu Town. The research provides a basis to adjust and optimize the layout and production of Yuexi Cuilan in Yuexi County, and also the ecological management of land.
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