摘要
初步探讨了火炬树根、叶浸提液对紫穗槐、侧柏、火炬树的化感作用效应,对三个树种绝对发芽率、发芽指数、化感效应指数进行比较。结果表明:(1)火炬树发芽率低于紫穗槐、侧柏。发芽率顺序依次是:侧柏>紫穗槐>火炬树。(2)火炬树根浸提液处理的紫穗槐种子发芽率、发芽指数比对照低,化感效应指数均为负值;叶浸提液比根浸提液对紫穗槐种子萌发的抑制作用更明显。当浓度为0.15 g.L-1时,浸提液对紫穗槐种子发芽抑制最明显,其化感效应指数为-1.0392。(3)火炬树浸提液处理后,侧柏绝对发芽率和绝对发芽指数小于对照,说明其抑制作用明显;且叶浸提液的化感抑制效应强于根浸提液。(4)火炬树浸提液对自身种子萌发基本没有影响。
A preliminary study was made on the allelopathy of the root and the aqueous extract from Rhus typhina on Amorpha fruticosa,Platycladus orientalis,and R.typhina from the aspects of germination rate,germination index and response index.The results showed that:(1)the germination rate of R.typhina was lower than those of A.fruticosa and P.orientalis with an order of P.orientalis > A.fruticosa> R.typhina;(2) The germination rate and germination index of A.fruticosa treated by the root extract were lower than the control,response index of A.fruticosa was negative.The inhibit effects of leaf extract was more significantly than those of root extract.The strongest promotion effects exhibited in the treatment of root 0.15 g·L-1 with the RI-1.0392;(3)Root exudates obviously inhibited the germination of seed of P.orientalis.And the inhibition effect of leaf extract was more significant than the root extract;(4)Extracts had no evident effects on the germination rate,germination index and response index of R.typhina.
出处
《西北林学院学报》
CSCD
北大核心
2008年第6期162-165,共4页
Journal of Northwest Forestry University
基金
国家自然科学基金项目(1011547)
关键词
火炬树
化感作用
发芽率
发芽指数
化感效应指数
Rhus typhina
allelopathy
germination rate
germination index
response index
