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-  2015 

毛乌素沙地沙柳对花棒和柠条的化感作用
Allelopathy Effects of Salix cheilophila on Hedysarum scoparium and Caragana korshinskii in Mu Us Desert

DOI: doi:10.3969/j.issn.1001-7461.2015.04.06

Keywords: 毛乌素沙地,沙柳,花棒,柠条,化感作用
,Mu Us Desert,Salix cheilophila,Hedysarum scoparium,Caragana korshinskii,allelopathy

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Abstract:

通过生物测定方法,研究了毛乌素沙地的沙柳(Salix cheilophila)枝叶浸提液对2种豆科植物花棒(Hedysarum scoparium)、柠条(Caragana korshinskii)的种子萌发与幼苗生长的化感作用。结果表明,沙柳可以抑制2种受体种子萌发和幼苗生长,花棒的各项指标在随着浸提液浓度升高时抑制作用逐渐减小,柠条的各项指标随着浸提液浓度增加抑制作用逐渐增大。花棒幼苗的地上部分比地下部分敏感,柠条幼苗的地下部分比地上部分敏感。沙柳对花棒和柠条的叶绿素含量指标表现为明显的抑制作用;对柠条根系活力指标表现为明显的抑制作用。因此,对根系和光合系统的破坏可能反映了沙柳化感作用的主要方式。
Allelopathy effects of the branch-leaf aqueous extract of Salix cheilophila on the seed germination and seedling growth of Hedysarum scoparium and Caragana korshinskii were investigated by bio-assay method. The results showed that the extract exhibited inhibitory effects on seed germination and growth of the two Leguminous plants. And the inhibitory effects to H. scoparium decreased alone with the increase of the concentration of the extract, in contrast, the germination index of C. korshinskii decreased alone with the concentration of the extract. The aerial parts of H. scoparium seedlings were more sensitive than the underground parts, while C. korshinskii underground parts were more sensitive than the aerial parts. The extract showed a sensitive inhibitory effect on chlorophyll content of H. scoparium and C. korshinskii and significant inhibition on C. korshinskii root activity. By inference, damage to the roots and the photosynthetic system may be reflected the allelopathy effect of S. cheilophila

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