Eco-geochemical process of characteristic forest fruit resources and its significance of quality improvement in Chengde City
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摘要: 承德南部燕山山地的特色林果资源分布具有明显的地域性，以兴隆—喜峰口断裂为界， “京东板栗”集中于断裂以南片麻岩区，“兴隆山楂”集中于北部白云岩区，厘定主要控制因素对林果资源的品质提升具有重要的意义。文章从地质建造和生态地球化学的视角，分析片麻岩和白云岩建造的元素含量及相关性、研究元素迁聚特征和生物富集性，讨论影响作物品质的主要因素。研究表明：片麻岩建造以斜长石、石英和云母类矿物成分为主，Al2O3、Fe2O3、K2O、TiO2、P2O5、Mn、Cu、Zn、Ni、Co元素含量明显高；相应白云岩建造以白云石矿物为主，MgO、CaO元素含量高；基岩-土壤质量迁移系数（τ）值显示片麻岩建造中Se、B、V、S、Mn和Mo元素相对Ti元素富集；白云岩建造中Na2O、P、Ni元素相对Ti元素富集。板栗生物富集系数为Cu > Zn > Mo > Ni > Mn > Ge > Fe，山楂生物富集系数为Cu > Zn > Ni > Mn > Ge > Fe > Mo。基于板栗、山楂的品质控制生态地质模型，优选山楂的最适宜区面积为497.2 km2，板栗的最适宜区面积为499.01 km2。本研究成果可为地方的农业产业结构优化提供借鉴。Abstract: The distribution of characteristic forest and fruit resources in Yanshan Mountain in the south of Chengde is obviously regional, with Xinglong-Xifengkou fault as the boundary, "Jingdong Chestnut" concentrated in gneiss area in the south, and "Xinglong Hawthorn" concentrated in dolomite area in the north, so it is of great significance to determine the main controlling factors for improving the quality of forest and fruit resources. From the perspective of geological formation and eco-geochemistry, this paper analyzes the element content and correlation of gneiss and dolomite formation, studies the characteristics of element migration and biological enrichment, and discusses the main factors affecting crop quality. The results show that:the gneiss formation is mainly composed of plagioclase, quartz and mica minerals, and the contents of Al2O3, Fe2O3, K2O, TiO2, P2O5, Mn, Cu, Zn, Ni and Co are obviously high.Correspondingly the dolomite formation is mainly composed of dolomite minerals with high contents of MgO and CaO. The mass transfer coefficient (τ) between bedrock and soil shows that Se, B, V, S, Mn and Mo are relatively enriched in gneiss formation, while Na2O, P and Ni elements are relatively enriched in dolomite formation. The enrichment coefficient of chestnut is Cu > Zn > Mo > Ni > Mn > Ge > Fe, and that of hawthorn is Cu > Zn > Ni > Mn > Ge > Fe > Mo. Based on the ecological geological model of quality control of Chinese chestnut and hawthorn, the most suitable area for screening hawthorn and Chinese chestnut is 497.2 km2 and 499.01 km2 respectively. The research results can provide reference for the optimization of local agricultural industrial structure.
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Key words:
- geological formation /
- eco-geochemistry /
- forest fruit resources /
- enrichment coefficient /
- Chengde
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