紫茎泽兰叶片对两种土著辣椒的化感效应

Allelopathic Effects of Eupatorium adenophorum Spreng. on Two Kinds of Native Capsicum annuum L.

测定紫茎泽兰(Eupatorium adenophorum)地上部水提液对两种辣椒种子萌发、幼苗生长及一些生理的影响。结果表明,低浓度对独山种子发芽速率、萌发率没有影响,高浓度延迟种子发芽,降低种子发芽速率影响最终萌发率,高浓度抑制幼苗的生长;低浓度对福泉辣椒种子提高发芽速率最终提高萌发率,低浓度时幼苗根和苗生长增加,高浓度抑制根长和苗高的生长,有明显的化感作用特征。两种辣椒幼苗丙二醛含量随着处理浓度的升高而升高,叶绿素a/b值随着处理浓度的升高而降低。

In this study, the effects of overground parts of E. adenopherum on seeds germination, seedlings growth and a lot of physiology of two kinds of native C. annuum L. was researched. Results showed ： Low concentration extract had no effect on Dushan＇ s seeds germination rate and germination speed. High concentration extract delayed seeds germination and reduced the seeds germination speed and finaUy affected seeds germination rate. High concentration extract inhibited the growth of seedlings;Low concentration extract raised Fuquart＇ s seeds germination speed and finally increased seeds germination rate. Low concentration extract could increase the length of seedlings root and the height of seedlings. High concentration extract inhibited the length of seedlings root and the height of seedhngs. There was obvious character of allelopathy. MDA＇ s contents of two kinds of C. annuum L. increased with the concentration hoisted, and the chlorophyll a/b decreased with the concentration decreased.