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作 者 ：刘文菊,张西科,张福锁

期 刊 ：生态学报 2000年 20卷 3期 页码：448~451

关键词：水稻；根分泌物；难溶性镉；活化；

Keywords:rice, root exudates, CdS, mobilization,

摘 要 ：采用人工控制光温条件的蛭石 -营养液相结合的培养方法 ,对根分泌物活化难溶性硫化镉以及对水稻吸收、运输镉的影响进行了研究。结果表明 ,缺铁水稻根分泌物和缺铁小麦根分泌物均能活化水稻根际的难溶性镉 ( Cd S) ,促进了水稻对这部分镉的吸收和运输 ;但二者的活化强度不同 ,缺铁小麦根分泌物对镉的活化作用较缺铁水稻根分泌物强。

Abstract:The mobilization of wheat and rice root exudates on cadmium sulfide CdS,in rice rhizosphere and their effects on Cd uptake and transport by rice in vermiculite and nutrient solution were investigated.The result showed that the amount of dissolved Cd by the wheat and rice root exudates without Fe treatment was higher than those with Fe treatment.The reason was that they could exudate plenty of PS and PS may chelate Cd to form soluble PS\|Cd chelate complex.So the root exudates of rice and wheat without Fe tr...

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