【摘要】 以广西农业资源和农村经济信息地面公里网点监测的36个县(市、区)为对象,通过提取耕地监测样点土壤进行化验,分析了耕地土壤养分的变化动态、土壤重金属、农药残留状况及其原因。结果表明,土壤有机质、全氮、速效磷的含量均比“二普”时期提高了一个档次,普遍存在缺钾现象,土壤酸性加大,土壤重金属综合污染指数为:水田0.3147,未污染;旱地1.1076,属轻度污染。更多还原

【Abstract】 Through applying ground kilometer net node monitoring system of agricultural resources and rural economic information in 36 counties(city and region),the soils of monitoring sampling points in cultivated land were collected for study.Soil nutrients,heavy metal content and pesticide residue in soil were analyzed.The results showed that the soil organic matter,the total nitrogen and available P content were increased by a grade compared to that of the second National Soil Survey;K deficiency was very common in soil,and the acid of soil was increased;the comprehensive pollution index of heavy metal in paddy field was 0.3147 with no pollution,and that of upland land was 1.1076 with a slight-degree pollution.更多还原