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不同土培条件下荧蒽在水稻和小麦中的分布特征

Keywords: 荧蒽,黄棕壤,潮土,水稻,小麦,分布

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Abstract:

通过盆栽试验方法,在荧蒽污染的黄棕壤和潮土上种植水稻和小麦,分别设置空白(CK)、低(L)、中(M)、高(H)4个污染浓度水平,比较荧蒽对作物生长的影响和两种不同土壤中植物体荧蒽的分布情况。结果显示,在试验设置的荧蒽污染浓度下,荧蒽未对两种植物的生长造成抑制,相反还促进了植物某些部位的生长;水稻和小麦各部位的荧蒽含量随土壤荧蒽含量的增加而增大;植物体内荧蒽的传导系数随土壤荧蒽含量的增加而减小,且两种土壤的趋势一致。黄棕壤和潮土有机质、养分、阳离子交换量等性质影响植物体内荧蒽的运移和富集;水稻茎叶对荧蒽的富集能力强于小麦,而小麦籽粒富集荧蒽的能力强于水稻。

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