Exploration of land use optimization path based on geological formation in Chengde City
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摘要: 土地潜力评价是土地利用优化的前提,对土地资源高效利用和生态保护具有重要意义。基于在土壤“地质大循环”过程中,地质建造会影响土壤保持量、质地结构、养分含量和水文条件等,并决定土地资源初始禀赋特征的规律,文章探索建立了以地质建造为基础的土地潜力评价和利用优化路径。将承德市划分为堆积建造（第四系沉积物）、碳酸盐岩类建造、碎屑岩类建造、花岗岩类建造、火山岩类建造、片麻岩建造等六种类型。在不同流域尺度上,开展基于地质建造的土地潜力评价和利用优化实践：全流域上,将承德市滦河流域划分为北部土地沙漠化草地保护修复区、中部水源涵养（中草药）发展区、南部特色林果产业发展和生态林保护区、河谷耕地农业用地发展区等七类保护和利用建议区；小流域上,针对柴白河小流域人工造林用地优化，提出花岗岩、流纹岩建造适宜造林区,砂砾岩建造一般适宜造林区，白云岩建造不适宜造林区；对小滦河小流域的土地沙化和草地退化保护修复用地进行优化,划分出耕地适宜区、湿地保护区、造林适宜区、优质牧草区、草场退化区、生态保护区等六类利用优化建议区。Abstract: The evaluation of land potential is the premise of land use optimization, which is of great significance to the efficient use of land resources and ecological protection. In the process of "geological cycle" of soil, geological formation will affect soil retention, texture structure, nutrient content and hydrological conditions, which determines initial endowment characteristics of land resources. Based on this law, the paper explores land potential evaluation and utilization optimization path. The geological formation is divided into six types:accumulation formation (Quaternary sediments), carbonate rock formation, clastic rock formation, granite formation, volcanic rock formation and gneiss formation in Chengde City.On different basin scales, land potential evaluation and utilization optimization practice based on geological formation are carried out. On the whole basin, Luanhe River Basin is divided into northern desertification grassland protection and restoration area, central water conservation (Chinese herbal medicine) development area, southern characteristic fruit development and ecological forest protection area, valley farmland agricultural land development area in Chengde City. In the small basin, it is suggested that granite and rhyolite are suitable for afforestation, glutenite is generally suitable for afforestation and dolomite is not suitable for afforestation. According to the protection and restoration of land desertification and grassland degradation in Xiaoluanhe basin, six kinds of optimization suggestions are divided, which are suitable for cultivated land, wetland protection area, afforestation area, high-quality pasture area, grassland degradation area and ecological protection area.
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Key words:
- geological formation /
- land initial endowment /
- land use /
- land resources /
- Chengde City
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