CAJ | 학술논문

对山东芋主产区的球茎、农田土壤和灌溉水进行重金属抽样检测，依据 GB 18406.1-2001，83份球茎样本的 As、Hg 和 Pb 含量均未超过限量标准，33份芋球茎样本的 Cd 含量超过限量标准0.05 mg·kg-1，但超出量较小，最高仅为0.36 mg·kg-1，超标样本的分布区域不集中。依据 GB/T 18407.1-2001，83份土壤样本中的 Pb、Hg 和 As 含量均未超过对应 pH值的限量标准，6份土壤样本的 Cd 含量超过限量标准0.3 mg·kg-1（pH ＜7.5），最高值为0.944 mg·kg-1。31份灌溉水样的4种重金属含量均未超标。检测结果表明，山东芋主产区的农田未受到4种主要重金属的污染。相关性分析结果显示，芋球茎的 Cd、Pb 含量与土壤中 Cd、Pb 含量分别呈极显著或显著正相关，表明芋球茎积累的 Cd、Pb 主要来源于土壤。芋球茎的Cd 含量与土壤 pH 值呈显著负相关，土壤 Cd、As、Pb 与有机质含量呈极显著或显著正相关，表明土壤 pH 值和有机质含量是影响重金属积累的重要因素。农药和化肥的施用等可能导致了山东部分地区土壤中 Cd 的积累。
대산동우주산구적구경、농전토양화관개수진행중금속추양검측，의거 GB 18406.1-2001，83빈구경양본적 As、Hg 화 Pb 함량균미초과한량표준，33빈우구경양본적 Cd 함량초과한량표준0.05 mg·kg-1，단초출량교소，최고부위0.36 mg·kg-1，초표양본적분포구역불집중。의거 GB/T 18407.1-2001，83빈토양양본중적 Pb、Hg 화 As 함량균미초과대응 pH치적한량표준，6빈토양양본적 Cd 함량초과한량표준0.3 mg·kg-1（pH ＜7.5），최고치위0.944 mg·kg-1。31빈관개수양적4충중금속함량균미초표。검측결과표명，산동우주산구적농전미수도4충주요중금속적오염。상관성분석결과현시，우구경적 Cd、Pb 함량여토양중 Cd、Pb 함량분별정겁현저혹현저정상관，표명우구경적루적 Cd、Pb 주요래원우토양。우구경적Cd 함량여토양 pH 치정현저부상관，토양 Cd、As、Pb 여유궤질함량정겁현저혹현저정상관，표명토양 pH 치화유궤질함량시영향중금속적루적중요인소。농약화화비적시용등가능도치료산동부분지구토양중 Cd 적적루。
In this study,sampling test of heavy metals of tuber〔Colocasia esculenta(L.)Schott〕, soil and water were performed in main production areas of Shandong Province.The results indicated that As, Hg and Pb contents of 83 tuber samples did not exceed the maximum limits of GB 18406.1-2001.Cd content of 33 samples with relatively even distribution exceeded the limit of 0.05 mg·kg-1 by a very small amount.The highest value of Cd content was 0.36 mg·kg-1.According to GB/T 18407.1-2001,the As,Hg,Pb content of 83 soil samples did not exceed the maximum limits,while the Cd content of 6 soil samples exceeded the limit of 0.3 mg·kg-1(pH < 7.5)with highest value 0.944 mg·kg-1.Four heavy metal contents of 31 water samples did not exceed the maximum limits.It referred that taro production areas in Shandong Province were not polluted by the above mentioned 4 heavy metals.Further analysis revealed that the Pb and Cd contents of tubers were very significantly or significantly correlated with the Pb and Cd contents of soil,indicating that Pb and Cd in tubers mainly come from soil.The Cd content of tubers had a very significant negative correlation with pH value of soil, and the Cd,As and Pb contents in soil were very significantly or significantly correlated with the organic substance content,which indicating that pH value and organic matter contents were the main factors influencing heavy metal accumulation.The usage of agricultural medicine and fertilizers might cause Cd accumulation in some areas of Shandong Province.