不同植物种水浸液对杉木幼苗各器官铝积累的化感效应

用杉木、木荷及马尾松枝叶水浸液处理杉木幼苗,6年后分析不同植物种水浸液对杉木幼苗各器官铝含量及分配率的影响.结果表明:木荷、马尾松、杉木高浓度枝叶水浸液处理的杉木幼苗,其各器官铝含量随水浸液浓度的升高而普遍升高;在水浸液高浓度处理时,杉木枝叶水浸液处理的杉木幼苗各营养器官铝含量均高于木荷、马尾松和对照处理.就各器官铝分配率而言,高浓度杉木枝叶水浸液有利于提高杉木幼苗叶、干、皮、根等器官铝分配率,而高浓度木荷及马尾松水浸液有利于提高干、皮、根等器官铝分配率.

Allelopathy Effect of Aqueous Extracts of Different Tree Species on Accumulation of Al Element in Different Organs of Cunninghamia lanceolata Seedlings

The treatment effect with different aqueous extracts of different tree species on Al content and Al distribution rate in different organs of Cunninghamia lanceolata seedlings was measured 6 years after the application.The results showed that the higher concentrations of aqueous extracts of Schima superba,Pinus massioniana and C.lanceolata were,the higher Al contents in different organs of C.lanceolata seedlings were.Al contents in different organs of C.lanceolata seedlings that had been treated with high concentration aqueous extract of C.lanceolata were higher than those of seedling treated with aqueous extracts of S.superba and P.massioniana. As far as the Al distribution rate was concerned,high concentrations of C.lanceolata aqueous extracts had positive effect on promoting Al distribution rate in leaf,stem,bark and root,while high concentrations of aqueous extracts of S.superba and P.massioniana had positive effect on promoting Al distribution rate in stem,bark and root system of C.lanceolata seedlings.