作　　者： ; ;

机构地区： 中山大学环境科学与工程学院环境气象研究所

出　　处： 《中山大学学报（自然科学版）》 1994年第2期127-130,共4页

摘　　要： 用核素^（６５）Ｚｎ标记物示踪方法研究宽叶香蒲Ｔｙｐｈａｌａｔｉｆｏｌｉａ对^（６５）Ｚｎ的吸收和分布，发现宽叶香蒲对锌有效强的吸收能力。锌主要由宽叶香蒲的根和地下茎吸收积累，只有小部分（２．５％～１ｌ；８％）累积在叶中。宽叶香蒲各器官吸收锌的量是根＞地下茎＞叶，宽叶香蒲吸收累积锌的量随时间延长而增加；吸收率开始时不断增大，１２ｈ后下降。吸收率还随培养液中锌的浓度增大而增大，但当锌的浓度超过２００ｍｇ·Ｌ^（－１）时吸收率下降。 The result of the study of the absorption and distribution of ￣(65)Zn in Typha latlfolia shows that Typha has a very powerful capacity of absorbing ￣(65)Zn,The ￣(65)Zn ab-sorbed and accumulated by the root and rhizome of Typha was much greater than thattransferred to the leaf. The capacity of absorbing ￣(65)Zn of the organs of Typha is as fol-lows:root>rhizorne>leaf. The research also shows that the quantity of ￣(65)Zn absorbedby Typha increased with the time, Moreover, the quantity of zinc absorbed by Typha in-creased with the concentration of ￣(65)Zn in the culture solution. But the rate of absorbing￣(65)Zn of Typha declined after 24 hor the concentration of ￣(65)Zn in culture solution beyond200mg· kg￣(-1).

关 键 词： 核素示踪 宽叶香蒲 吸收 锌

领　　域： [环境科学与工程]