不同农业用地类型对土壤性质和土壤环境的影响——以北京市延庆县为例
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北京市自然科学基金项目"北京城郊土壤镉的生物毒性及其评价模型研究"(8122014);北京市青年英才计划;首都师范大学校教学改革项目


Effects of Different Agricultural Land Use Types on Soil Properties and Soil Environment-A Case Study in Yanqing County of Beijing City
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    摘要:

    选择北京市延庆县为研究区域,通过对不同农业用地类型的土壤进行采样和分析,研究了延庆县不同农业用地类型对土壤性质和环境的影响,以期为北京市土壤的农业可持续利用提供依据。结果表明,研究区域粮田、菜地、果园的土壤pH值、有机质和碱解氮含量均显著低于林地;4种不同农业用地类型中表层土壤的As,Cd,Cr含量平均值分别超出北京市土壤背景值0.93,0.09和15.3 mg/kg。粮田、菜地耕作层的重金属含量高于林地和果园,内梅罗指数和单项污染指数评价表明这4种土壤利用类型尚属清洁。尽管研究区目前重金属污染程度较低,最高值仅为警戒值的74%,但其单项污染指数显示该地区土壤重金属累积速度较快。粮田土壤中As,Cd元素含量较退耕林地分别增加了20.9%和38.5%。如不加以控制,土壤重金属污染状况会进一步加剧。

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    The effect of different agricultural land use types on soil properties and soil environment in Yanqing County of Beijing City were studied to provide the basis of agricultural soil utilization and sustainable development for Beijing City. The results showed that the soil pH value, organic matter content and alkaline hydrolysis nitrogen content in grain field, vegetable fields and orchard were significantly lower than those in woodland. The As, Cd, Cr content in surface soil of four different agricultural land use types had 0.93 mg/kg, 0.09 mg/kg and 15.3 mg/kg higher than the soil background values, respectively. The heavy metal content of grain field and vegetable field in plough layer were higher than that of woodland and orchard. Nemerow index and the single pollution index evaluation showed that there were non-pollution in the four different agricultural land use type. Although the soil environment quality was at safe level, the highest value of single pollution reached 74% of the alarm value, but the single pollution index showed the soil heavy metal accumulated rapidly in the area. For example, the content of As and Cd in grain field increased by 20.9% and 38.5% than the forest returned from farmland. The soil pollution will be further intensified if uncontvoued.

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杨昱祺,王小策,孙淑蕊,王学东.不同农业用地类型对土壤性质和土壤环境的影响——以北京市延庆县为例[J].水土保持通报,2014,(5):313-316,321

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  • 收稿日期:2013-07-05
  • 最后修改日期:2013-11-03
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  • 在线发布日期: 2016-04-05
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