塔里木河下游胡杨对疏叶骆驼刺种子萌发和幼苗生长的影响

Effects of Populus euphratica on seed germination and seedling growth of Alhagi sparsifoliain downstream of Tarim River

为了探明生态恢复过程中地表植被对种子萌发和幼苗定居的影响,分析了胡杨(Populus euphratica)不同组织(根、茎、叶)浸提液和不同浸提液浓度(0.04、0.08、0.12、0.16、0.20g·mL-1)对多年生草本疏叶骆驼刺(Alhagi sparsifolia)种子的化感作用。结果表明,胡杨浸提液对疏叶骆驼刺种子萌发和幼苗生长均具有抑制作用,不同组织和不同浸提液浓度抑制作用不同:胡杨叶浸提液对疏叶骆驼刺种子的萌发率具有显著的影响;茎浸提液对疏叶骆驼刺种子的萌发率和幼苗的苗长影响显著;根浸提液对疏叶骆驼刺幼苗的苗长影响显著(P<0.05)。

In order to explore the effects of vegetation on seed germination and seedling settlement during the process of ecological restoration, the allelopathy of the extracts of different plant tissue from Populus euphratica with various concentrations （0.04, 0.08, 0.12, 0.16, and 0.20 g·mL^-1） on the seeds of perennial herb Alhagi sparsifolia was analyzed. The water extracts of P.euphratica have inhibition effects on the seed germination and seedling growth of A.sparsifolia. Different plant tissues and different concentrations of water extracts had different inhibition effects. The water extract of P.euphratica leaves had significantly inhibition effects on seed germination rate and seedling length of A. sparsifoliai The water extracts of stems also had significantly inhibiting effects on seed germination of A.sparsifoliai. The water extract of roots had significantly inhibiting effects on the seedling length of A.sparsifolia.