Cd、Zn、Pb及其相互作用对烟草、小麦的影响

烟草对Cd、Zn、Pb是一种敏感性作物,Cd、Zn、Pb对烟草的影响比对小安、水稻都大。 Cd、Zn、Pb在烟草各器官中的累积随土壤Cd、Zn、Pb浓度的增高而增大。 Cd、Zn、Pb在烟草各器官中含量的次序为:茎叶>根>籽粒。它们在根中受阻,而较易转移到茎叶和籽粒中。 烟草对Pb的吸收比对Zn和Cd明显地低。Pb仍然是一种低吸收性元素。 土壤Zn增加,减低了烟草对Cd的吸收,而土壤Pb的增加,则促进了烟草对Cd的吸收。

THE EFFECTS OF CADIUM, ZINC AND LEAD IN THE SOIL ON TOBACCO AND WHEAT

The tobacco is a sensitive plant for Cd, Zn and Pb. The effects of Cd, Zn and Pb are greater on tobacco than on wheat or rice.The accumulation of Cd, Zn and Pb in various organs of tobacco increases with their amounts in the soil.The sequence of Cd, Zn and Pb contained in various organs of tobacco is as follows: stems leaves roots grains. They are obstructed in roots, but they are easily transported into stems, leaves and grains.The increasing of Zn in the soil reduces the uptake of Cd by tobacco, but the i...