Studies on the allelopathic potential of selected plant species and characterization of allelochemicals
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Date
1994
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Publisher
University of Colombo: UC(SCI); UC(CEN).
Abstract
The work embodied in this thesis endeavours deeply to evaluate the allelopathic potential of selected plant species: VIZ Gliricidia maculate(H.B.K)steud, (gliricdia sepium (Jacq.) Steud)1 (Fabaceae) and Tithonia diversifolla (Hems1) Gray. (Asteraceae) After setablishing that Teachate and blended aqueous extracts of both species had considerable bioactivity (both stimilatory and inhibitory), the leaf matetial applied as surface mulches and/or soil- incorporated residues, was teated in field experiments as wellas inglass house based pot experiments for weed suppression ability and other effects. Field studies as well as pot experiments the growth of crops (Tomato, Brinjar, Chilli), whilst controlling weeds in the treated plots very significantly, generally at rates of 2 or 4kg/m In these studies, the promotion of growth of the theee field crops caused by both types of residues was quite spectacular. Pot experiments clearly established that surface applied residues, as well as incorporated residues stimulated the growth of crop species, and caused significant inhibition of seed germination and seedling growth of weed species. surface placed residues were more effective than incorporated residues when the effect of timee of decomosition on the phytotoxicity of the residues was studied, evidence was obtained that Gliricidia residues were bioactive (stimulating the growth of crop species)....
Description
Dissertation: M.Phil., University of Colombo: UC(SCI); UC(CEN), 1994.
Keywords
Plants, medicinal
Citation
HEMALAL, KDP, Studies on the allelopathic potential of selected plant species and characterization of allelochemicals, University of Colombo UC(SCI); UC(CEN), 1994: p.