北碚区菜地规划区内不同土地利用方式下土壤铅、镉研究  

Research on the Lead,Cadmium of Soil Under Different Land-use Types in Vegetable Field Planning Area of Beibei

作　　者：袁波[1] 傅瓦利[1] 蓝家程[1] 张婷[1] 彭景涛[1] 

机构地区：[1]西南大学地理科学学院,重庆400715

出　　处：《水土保持学报》2011年第6期202-206,共5页Journal of Soil and Water Conservation

基　　金：重庆市移民局课题(200909)

摘　　要：通过野外采样、室内测试及数理统计,对北碚区菜地规划区内前期不同土地利用方式下土壤的铅、镉进行研究。结果表明:(1)通过描述统计与方差分析得出不同土地利用方下铅和镉全量、有效态含量、生物有效性系数有不同程度的差异,土地利用方式对其有不同程度的影响。(2)在研究区内,车辆废气排放、肥料施用的差异是影响全量差异的可能因素,土壤pH值的差异、有效磷含量差异、铅与镉全量的差异是影响有效态含量差异的可能因素。全量的差异是影响生物有效性系数差异的主要因素。(3)以重庆市土壤铅、镉背景值为标准,通过地质累积指数法计算得出,菜地规划区内土壤铅、镉受轻度污染,其中混作地与水田土壤铅污染程度较菜地的明显,菜地土壤镉污染程度较水田和混作地的明显。through the field sampling, test in lab. and mathematical statistics, researched on the lead, cadmi- um of soil under different land-use types in before in vegetable field planning area of Beibei . The results showed that.（1）Through descriptive statistics and analysis of variance, under the different land-use types the total cadmium and lead, the contents of available lead and cadmium, the bioavailability index of cadmium and lead had different degree of difference. And the different land-use types had different degree of effecting on them. （2）In study area, vehicle emission, fertilizers difference were the possible factors which influenced on the difference of the total of lead and cadmium; the difference of the soil pH value, the differences contents of effective phosphorus, and the difference of the total of cadmium and lead were the possible factors which affected the content of the available, the bioavailability coefficient was affected by the total of lead and cadmi- um and the content of the available. The different of total of cadmium and lead was the main factor which af- fected the bioavailability indexes. （a）Used the background values of lead and cadmium of soil in Chongqing for the standard, through calculated the geological accumulation index, the soil of vegetable planning area had polluted in light by lead and cadmium, and the mixed and paddy field soil polluted by the lead was more obvious than that of vegetable field, the vegetable field soil polluted by the cadmium was more obvious than that of mixed and paddy field.

关 键 词：土地利用方式 土壤 铅 镉 累积特征 北碚区 

分 类 号：X53[环境科学与工程—环境工程]