钟山风景区土壤环境对人为踩踏扰动的响应
发布时间：2018-10-05 09:22
【摘要】：【目的】探究风景区不同旅游干扰强度下土壤质量的变化规律,分析人为踩踏对土壤的影响,为恢复土壤质量以及风景区的生态旅游规划与管理提供基础数据和理论依据。【方法】在南京钟山风景区选择3条宽度为3 m的游道,在每条游道边缘的垂直方向上设置1条7 m×1 m的调查样带,在每条样带上均选择3个1 m×1 m样方,距游道边缘1 m处样方为高强度干扰,距游道边缘3 m处样方为中等强度干扰,距游道边缘7 m处样方为对照区。采集样方不同土层(0~5,5~15和15~25 cm)土壤样品,测定土壤密度、含水量、持水量、p H、土壤有机质含量、土壤全氮含量、土壤速效磷含量和土壤酶活性。采用因子分析和主成分分析法计算公因子的贡献率和因子负荷量以确定各指标因子对土壤质量的重要性和贡献度,并通过对土壤各指标因子加权求和综合分析论证不同旅游干扰强度下土壤质量的变化规律。【结果】随旅游干扰强度增加,土壤含水量、孔隙度、持水量趋于下降,而土壤密度、p H趋于上升,且旅游干扰对0~5 cm土层土壤的影响大于5~15和15~25 cm土层土壤;随干扰强度增加,土壤有机质、全氮和速效磷含量趋于下降,碳氮比呈上升趋势;与对照区相比,旅游干扰下,土壤脲酶、酸性磷酸酶、蔗糖酶和过氧化氢酶活性降低,且土壤质量趋于下降;随土层加深,土壤质量呈先上升后下降的趋势;由于背景区未受干扰,其表层土壤质量最佳,土层越深,土壤质量越差。【结论】土壤有机质含量、全氮含量和蔗糖酶活性的权重较大即对旅游干扰下土壤质量变化的贡献度较大,可作为钟山风景区土壤健康状况评价指标;可以通过土壤酶活性和有机质含量来动态监测景区土壤肥力;需对游客数量进行时空调控来控制生态环境容量,从而保证景区的可持续发展和生态效益。
[Abstract]:[objective] to explore the change rule of soil quality under different tourist disturbance intensity in scenic spots, and analyze the effect of human stampede on soil. To provide basic data and theoretical basis for restoring soil quality and ecotourism planning and management of scenic spots. [methods] three tourist paths with a width of 3 m were selected in Nanjing Zhong Shan Scenic area. A survey sample of 7 m 脳 1 m was set up in the vertical direction of each trail edge. Three 1 m 脳 1 m sample squares were selected in each sample zone, and the high intensity interference was observed at 1 m from the edge of the trail. There was moderate intensity interference in the sample square 3 m from the edge of the trail and 7 m away from the edge of the road as the control area. Soil samples were collected from different soil layers (0 ~ 5 ~ 5 ~ 5 ~ 5 ~ 15 and 15 ~ 25 cm). Soil density, water content, water holding capacity, soil organic matter content, soil total nitrogen content, soil available phosphorus content and soil enzyme activity were determined. Factor analysis and principal component analysis were used to calculate the contribution rate of common factor and factor load to determine the importance and contribution of each index factor to soil quality. The variation law of soil quality under different tourist disturbance intensity was demonstrated by comprehensive analysis of the weighted summation of soil index factors. [results] with the increase of tourism interference intensity, soil water content, porosity and water holding capacity tended to decrease. However, the soil density and pH tended to increase, and the effect of tourism disturbance on 0 ~ (5) cm soil layer was greater than that on 5 ~ (15) and 15 ~ (25) cm soil layer, and the contents of organic matter, total nitrogen and available phosphorus tended to decrease, and the C / N ratio increased with the increase of soil disturbance intensity. Compared with the control area, the soil urease, acid phosphatase, sucrase and catalase activities decreased, and the soil quality tended to decrease, and the soil quality increased first and then decreased with the deepening of the soil layer. Because the background area is undisturbed, the surface soil quality is the best, and the deeper the soil layer is, the worse the soil quality is. [conclusion] the content of soil organic matter, The weight of total nitrogen content and sucrase activity is larger, that is, the contribution of total nitrogen content and sucrase activity to the change of soil quality under the disturbance of tourism is great, which can be used as the evaluation index of soil health status in Zhong Shan scenic area. The soil fertility can be dynamically monitored by soil enzyme activity and organic matter content, and the ecological environment capacity should be controlled by spatiotemporal control of the number of tourists, so as to ensure the sustainable development and ecological benefit of the scenic area.
【作者单位】： 南京林业大学江苏省水土保持与生态修复重点实验室江苏省南方现代林业协同创新中心;
【基金】：江苏省科技项目(BE2012344) 林业公益性行业科研专项(201504406) 江苏省优势学科(PAPD)
【分类号】：S151.9
，
本文编号：2252848
[Abstract]:[objective] to explore the change rule of soil quality under different tourist disturbance intensity in scenic spots, and analyze the effect of human stampede on soil. To provide basic data and theoretical basis for restoring soil quality and ecotourism planning and management of scenic spots. [methods] three tourist paths with a width of 3 m were selected in Nanjing Zhong Shan Scenic area. A survey sample of 7 m 脳 1 m was set up in the vertical direction of each trail edge. Three 1 m 脳 1 m sample squares were selected in each sample zone, and the high intensity interference was observed at 1 m from the edge of the trail. There was moderate intensity interference in the sample square 3 m from the edge of the trail and 7 m away from the edge of the road as the control area. Soil samples were collected from different soil layers (0 ~ 5 ~ 5 ~ 5 ~ 5 ~ 15 and 15 ~ 25 cm). Soil density, water content, water holding capacity, soil organic matter content, soil total nitrogen content, soil available phosphorus content and soil enzyme activity were determined. Factor analysis and principal component analysis were used to calculate the contribution rate of common factor and factor load to determine the importance and contribution of each index factor to soil quality. The variation law of soil quality under different tourist disturbance intensity was demonstrated by comprehensive analysis of the weighted summation of soil index factors. [results] with the increase of tourism interference intensity, soil water content, porosity and water holding capacity tended to decrease. However, the soil density and pH tended to increase, and the effect of tourism disturbance on 0 ~ (5) cm soil layer was greater than that on 5 ~ (15) and 15 ~ (25) cm soil layer, and the contents of organic matter, total nitrogen and available phosphorus tended to decrease, and the C / N ratio increased with the increase of soil disturbance intensity. Compared with the control area, the soil urease, acid phosphatase, sucrase and catalase activities decreased, and the soil quality tended to decrease, and the soil quality increased first and then decreased with the deepening of the soil layer. Because the background area is undisturbed, the surface soil quality is the best, and the deeper the soil layer is, the worse the soil quality is. [conclusion] the content of soil organic matter, The weight of total nitrogen content and sucrase activity is larger, that is, the contribution of total nitrogen content and sucrase activity to the change of soil quality under the disturbance of tourism is great, which can be used as the evaluation index of soil health status in Zhong Shan scenic area. The soil fertility can be dynamically monitored by soil enzyme activity and organic matter content, and the ecological environment capacity should be controlled by spatiotemporal control of the number of tourists, so as to ensure the sustainable development and ecological benefit of the scenic area.
【作者单位】： 南京林业大学江苏省水土保持与生态修复重点实验室江苏省南方现代林业协同创新中心;
【基金】：江苏省科技项目(BE2012344) 林业公益性行业科研专项(201504406) 江苏省优势学科(PAPD)
【分类号】：S151.9
，
本文编号：2252848
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