Laboratory and field bioassay had performed to verify allelopathic effect of Pinus rigida ; seeding growth test of different species with aqueous extracts and rain leachate of the tree.
The tests were focused to different concentration of the aqueous...
Laboratory and field bioassay had performed to verify allelopathic effect of Pinus rigida ; seeding growth test of different species with aqueous extracts and rain leachate of the tree.
The tests were focused to different concentration of the aqueous extracts and rain leachates, also different developmental stages of selected species. The longer time of extraction or the earlier of growing stage they have treated with the chemicals, the more inhibitory effects have obtained clearly in both laboratory and field bioassay.
Allelochemicals of Pinus rigida were isolated and identified 8 phenolic compounds and 4 other by paper chromatography and HPLC.