吉林中西部土壤Cu、Zn元素有效态转化效率及自然影响因素分析

针对吉林省中西部土壤Cu、Zn丰度、有效态转化及其自然影响因素,采用有效系数与相关分析对梨树—公主岭、九台—德惠、榆树—扶余、农安、大安和通榆6个采样区的农田表层土壤样品进行系统评价分析。结果表明:(1)研究区Cu、Zn含量表现为中部远高于西部,且均略低于吉林省土壤背景值,呈缺乏状态。地积累指数均为0级或1级,呈清洁状态;(2)研究区Cu、Zn有效态转化程度中部高于西部,且区域差异性较大;(3)Cu、Zn有效态转化与其全量、Mo、Ni、Se、MgO和CaO等呈显著正相关,其中Zn有效态转化与pH、Cr、Mn和P等呈显著负相关。不同土壤类型之间Cu、Zn含量与转化特征呈现明显差异,其黑土中Cu、Zn转化率最高。

Available state transformation efficiency of soil copper and zinc in central-western Jilin and its natural impact factors

Aiming to understand the copper and zinc abundance, available form transformation and its natural impact factors of soils in mid-western Jilin Province, the authors systematically evaluated and analyzed the data of top soil samples collected from the cultivated lands of six sampling sites (Lishu-Gongzhuling, Jiutai-Dehui, Yushu-Fuyu, Nongan, Da'an and Tongyu) using available coefficient and correlation analysis. The research results indicate that:① copper and zinc abundance of the middle part of Jilin Province outclasses the western part, and both are slightly lower than the background values of Jilin Province, which indicates the potential nutrient deficiency, and the Muller indexes of all samplings are at zero level or the first level, i.e. no soil heavy metal contamination; ② the available form transformation degrees of soil copper and zinc of the middle part of Jilin Province is higher than that of the western part in general but with a relatively strong regional difference; ③ available form transformation of soil copper and zinc is positively related to their total content, soil Mo, Ni, Se, MgO and CaO, while available form transformation of soil zinc is negatively related to soil pH, soil Cr, soil Mn and soil P. The distinctions of copper and zinc abundance and available form transformation between different soil types are notable, and black soil is with the highest copper and zinc transformation rate.