岩溶地区休闲农业旅游对土壤环境的影响
发布时间：2018-08-04 09:40
【摘要】：为了探明在川东岩溶地区蓬勃兴起的休闲农业旅游活动对土壤生态环境的影响,以重庆市铜梁区黄桷门奇彩梦园(黄门现代农业园区)(下称"奇彩梦园")和北碚区金果园(休闲观光果园)(下称"金果园")游步道两侧的土壤样区为研究对象,通过现场调查、采样和实验室分析,研究了土壤各生态指标受影响的距离、受冲击规律及重金属潜在风险。结果表明:受农业游憩影响,两园区土壤含水量、土壤有机质、土壤全氮及碱解氮随着离游径的距离变小呈递减的趋势,土壤容重呈递增的趋势,而土壤pH值仅在奇彩梦园表现出随离游径的距离变小呈递增趋势,各指标受影响的范围主要集中在4m内;运用践踏指数分析得出两园区处于轻度践踏状态,土壤腐殖质层和草本并没有完全破坏,土壤生态环境在自然状态下可以得到一定恢复。通过对两园区土壤重金属的评价,发现各样区土壤环境处于清洁或尚清洁状态,Cd和Pb在部分样区内含量达到安全警戒状态(污染指数0.7),需采取措施重点防控。
[Abstract]:In order to find out the influence of leisure agricultural tourism activities on the soil ecological environment in karst areas of eastern Sichuan, Taking the soil sample areas on both sides of the walkway of Huangjuaomen Qicaimeng Garden (Huangmen Modern Agricultural Park) and Beibei Golden Orchard (Leisure Orchard) in Tongliang District of Chongqing as the research objects, the investigation was carried out on the spot. Sampling and laboratory analysis were carried out to study the impact distance, shock law and potential heavy metal risk of soil ecological indexes. The results showed that the soil water content, soil organic matter, total nitrogen and alkali-hydrolyzed nitrogen in the two parks decreased with the distance from the path, and the bulk density of the soil increased gradually under the influence of agricultural recreation. However, the soil pH value only showed an increasing trend with the distance from the swimming path decreasing in Qicai Dream Garden, and the affected range of each index was mainly within 4 m, and the analysis of trample index showed that the two parks were in a state of slight trampling. The soil humus layer and herbaceous plant were not completely destroyed, and the soil ecological environment could be restored to some extent under the natural condition. Through the evaluation of heavy metals in the soils of the two parks, it was found that the soil environment of each area was in a clean or still clean state. The contents of CD and Pb in some sample areas reached the state of safety alert (pollution index 0.7), and some measures should be taken to prevent and control the heavy metals.
【作者单位】： 陕西省土地工程建设集团;西南大学资源环境学院;重庆中国三峡博物馆;
【基金】：国家“乡村土地流转与资源整合关键技术与示范”课题(2013BAJ11B02) 国家十二五科技支撑项目(2012BAD141318)
【分类号】：F327;F592.7;X53
[Abstract]:In order to find out the influence of leisure agricultural tourism activities on the soil ecological environment in karst areas of eastern Sichuan, Taking the soil sample areas on both sides of the walkway of Huangjuaomen Qicaimeng Garden (Huangmen Modern Agricultural Park) and Beibei Golden Orchard (Leisure Orchard) in Tongliang District of Chongqing as the research objects, the investigation was carried out on the spot. Sampling and laboratory analysis were carried out to study the impact distance, shock law and potential heavy metal risk of soil ecological indexes. The results showed that the soil water content, soil organic matter, total nitrogen and alkali-hydrolyzed nitrogen in the two parks decreased with the distance from the path, and the bulk density of the soil increased gradually under the influence of agricultural recreation. However, the soil pH value only showed an increasing trend with the distance from the swimming path decreasing in Qicai Dream Garden, and the affected range of each index was mainly within 4 m, and the analysis of trample index showed that the two parks were in a state of slight trampling. The soil humus layer and herbaceous plant were not completely destroyed, and the soil ecological environment could be restored to some extent under the natural condition. Through the evaluation of heavy metals in the soils of the two parks, it was found that the soil environment of each area was in a clean or still clean state. The contents of CD and Pb in some sample areas reached the state of safety alert (pollution index 0.7), and some measures should be taken to prevent and control the heavy metals.
【作者单位】： 陕西省土地工程建设集团;西南大学资源环境学院;重庆中国三峡博物馆;
【基金】：国家“乡村土地流转与资源整合关键技术与示范”课题(2013BAJ11B02) 国家十二五科技支撑项目(2012BAD141318)
【分类号】：F327;F592.7;X53
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