茶园地形对土壤中总砷迁移影响的研究——以昌宁县为例

Study on the Effect of Tea Plantation Topography on the Transport of Total Arsenic in Soil:A Case Study of Changning County

选取茶园生态环境中高程和坡度作为土壤中总砷含量迁移规律影响因子的研究对象。通过对茶园现场获取的信息与实验室检测数据进行关联性分析,建立回归模型。结果表明,茶园土壤中总砷含量与茶园高程和坡度均有显著相关性。随着高程降低和坡度变小,茶园土壤中总砷含量逐渐升高,并到一定高程和坡度,茶园土壤中总砷含量升高趋势变大,超过风险管控标准中筛选值(40mg/kg)。

The elevation and slope of tea garden were selected as the research objects of the transfer law of total arsenic content in soil.A regression model was established by analysing the correlation between the information obtained from the tea garden and the measured data in laboratory.The results showed that the total arsenic content in tea garden soil was significantly correlated with the elevation and slope of tea garden.With the decrease of elevation and the decrease of slope,the total arsenic content in tea garden soil increased gradually,and the trend of total arsenic content in tea garden soil increased to a certain elevation and slope,which exceeded the standard of screening value(40mg/kg)in risk management standard.