Effects of Ageratina adenophora on Seed Germination and Seedling Growth of Eucalyptus spp
To research the influence of Ageratina adenophora on germination and seedling growth of Eucalyptus, the effect of Ageratina adenophora allelopathy on E. globulus , E. maideni, and Eucalyptus smithii were determined by using 3 different mixed matrix of Ageratina adenophora and humus (1︰10, 1︰20, and 1︰30) based on greenhouse experiment method, and the results showed: 1) their effects on E. globulus were promoting effect, and the synthesized effect index ( SEI) increased from 0. 150 to 0. 296 with the increase of Ageratina adenophora mate-rial; 2) they had both promoting effect and inhibiting effect on E. maideni, the 1︰10 matrix showed inhibition effect with the SEI of -0. 148 , the 1︰20 matrix only showed slight boost with the SEI of 0. 000 25 , the 1︰30 matrix showed a certain promoting effect with the SEI of 0. 174; 3 ) they also had promoting effect and inhibiting effect on E. smithii, 1 ︰10 and 1 ︰20 matrix showed significantly inhibitory effect with the SEI ranged from-0. 898 to -0. 863 , 1︰30 matrix showed promoting effect with the SEI of 0. 279 . This study showed that the dif-ferent degrees of Ageratina aenophora material could have different effects on germination and seedling growth of Eucalyptus spp. .
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