福美胂在苹果树上的残留

Residue of Arsenical Fungicide in Apple Trees

调查了两个果园１５～２０年树龄的苹果树在连续用福美胂喷涂７～１０年后树根、树皮、枝条、叶片、果实和土壤的砷含量，并和未使用福美胂的果树含量做了比较。结果表明，果实中有砷积累，但未超过食品卫生标准。使用福美胂的树皮、技条、叶片中砷含量比未使用福美胂的高儿倍～十几倍，树皮和短梢叶含量最高。枝条和叶片与树皮的砷含量有密切正相关。土壤表层虽有轻度积累，但不会对土壤生态环境有太大影响。

This study was carried out with apple trees aged 15～20 years.in two apple orchards where asomate had been used as a fungicide for 7～10 years.Arsenic contents in soil and in tree tissues such as roots,cortices,shoots,leaves and fruits were investigated.The results show that the arsenic accumulated in fruits did not exceed food hygienic standard;the arsenic contents in cortices,shoots and leaves were several to more than ten times higher than those in uncontaminated orchards;The highest arsenic contents were found in cortices and spur leaves;Arsenic contents in shoots and leaves were closely related to those in cortices;Arsenic was slightly accumulated in top soil,but will have no significant effect on soil eco-environment.