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- Title
Non-additive allelopathic effects of decomposing mixed litters of Eucalyptus urophylla and Acacia mangium on radish, lettuce and Paspalum notatum.
- Authors
Su, Y. J.; Cao, Y. H.; Ding, C. H.; Sun, Y. Y.; Cheng, K. L.; Zeng, R. S.; Song, Y. Y.; Li, Z. F.
- Abstract
We investigated the effects of decomposing leaf litters of Eucalyptus urophylla and Acacia mangium on plant growth, nitrogen (N) immobilization and allelopathy. We found that single and litter mixture of E. urophylla and A. mangium during decomposition inhibited the growth of test plants [radish (Raphanus sativus), lettuce (Lactuca sativa) and Paspalum notatum)]. Non-additive effects on growth inhibition were observed in pure and mixture of decomposing leaf litters. After 0 days decomposition, the litter mixture showed antagonism (germination rate lower than expected value). After 5 days of decomposition, the mixture effect was synergistic, and the germination rate was higher than the expected value. Finally, 20 days after decomposition, the effects became additive. Litter mixture slightly inhibited the root length (8 %) in treatment of water (AC-N-) and by 21 % in treatment of mineral solution (AC-N+), but the non-additive effects disappeared after the activated carbon (AC) was added to medium. We propose that the changes in the composition, proportion and concentration of allelochemicals in litter mixture caused the non-additive allelopathic effects.
- Subjects
MANGIUM; EUCALYPTUS; RADISHES; LETTUCE; FOREST litter; WATER purification
- Publication
Allelopathy Journal, 2020, Vol 49, Issue 2, p189
- ISSN
0971-4693
- Publication type
Article
- DOI
10.26651/allelo.j/2020-49-2-1264