Revista da FCCXXT

Studies on the Allelopathic Potential of Acacia dealbata Link. Allelopathic Potential Produced During Litter Bag Decomposition of Plant residues in the Field

Carballeira, Alejo1 and Reigosa, Manuel J.2*

1 Functional Biology Department. Faculty of Biology. University of Santiago de Compostela, Spain
2 FisiologĂ­a Vegetal. Plant Biology and Soil Science Department. Faculty of Biology, University of Vigo, Spain
* Correspondence author.



ABSTRACT

Temporal evolution of the phytotoxic capacity of lixiviates obtained from residues of Acacia dealbata in decomposition was studied. Such residues were decomposed in the soil in the field by means of the litter bags technique. The phytotoxic capacity was studied by means of bioassays of germination and growth of Lactuca sativa, Dactylis glomerata, Lolium perenne, Trifolium repens and Trifolium pratense. Two series of experiments were carried out, by working with naturally released plant residues with two different compositions. The results demonstrate that the high allelopathic capacity of decomposing residues from A. dealbata, although significant toxicity in bioassays is a bit different to the field conditions. The phytotoxic capacity when flowers are present is higher than bioassaying other plant materials.


Keywords: Allelopathy, Litter Bags, Acacia dealbata, Lactuca sativa, Lolium perenne, Trifolium repens, Trifolium pratense, Plant Residues Decomposition.



RECEIVED: February 16, 2017
ACCEPTED: June 12, 2017



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