【摘要】 基于半变异函数与局部空间自相关方法,对吉林省中部地区春、秋季玉米田土壤铅元素的全量和有效态含量的空间特征进行比较。结果表明,研究春、秋季土壤铅元素超背景值样点比率分别为100%和93.55%,春季土壤未出现铅元素污染,秋季土壤样点铅元素污染比例为3.23%,秋季土壤铅元素的全量与有效量均值均大于春季土壤,铅元素呈累积活化趋势。半变异函数模拟参数显示,秋季铅元素全量C0/(C0+C)为强空间相关性,主要受随机因素影响;春季铅元素全量和有效量、秋季铅元素有效量C0/(C0+C)为中等空间相关性,受到区域性因素影响相对较强。春、秋季土壤铅元素全量之间及相应季节的全量与有效量之间的局部自相关类型空间分布差异较大,春、秋季铅元素有效量的聚集类型分布较一致。春、秋季土壤铅元素全量及有效量HH聚集区集中在吉林省中部和西南部,长春市与四平市附近玉米田土壤铅元素累积转化相对较明显,四平地区耕地土壤的铅元素输入量明显高于长春地区,铅元素全量的区域性输入变化未引起其有效态转化情况的明显变化。更多还原

【Abstract】 In order to provide basic data for study on regulation of soil Pb accumulation and bio-available trans-formation and space utilization and planning for black soil resources, this paper compared the distribution character-istics of total Pb content and bio-available Pb content of soil samples collected in spring and autumn in central Jilinprovince by using semi variance function and Anselin local spatial autocorrelation. The results indicated that, the ra-tio of background value exceeded soil samples of spring and autumn were 100% and 93.55%, the ratio of Pb contam-inated soil samples of autumn was 3.23% and all spring samples showed no Pb contamination. The mean of total Pbcontent and bio-available Pb content of autumn all exceed that of spring, soil Pb showed an accumulated and bio-available transformed trend. Total Pb content of spring, total Pb content and bio-available Pb content of autumn allappear to strong spatial correlated, which was dominated by the impact of natural factors. Bio-available Pb contentof spring of spring appears to be medium spatial correlated, which was impacted more by the human factors relative-ly. Obvious differences of local spatial autocorrelation characteristics were found between spring total Pb and au-tumn total, spring total Pb and spring bio-available Pb, autumn total Pb and autumn bio-available Pb. However, lo-cal spatial autocorrelation characteristics of spring bio-available Pb and autumn bio-available Pb were similar witheach other. High-High type of all Pb locates in the central and southwestern part of the studied area, which showedmore accumulation of total Pb of Changchun area.更多还原