Allelopathic effects of leaf extract of populus deltoides M. on germination and seedling growth of some vegetables

摘要

Laboratory experiment was carried out to investigate the allelopathic effect of leaf leachate concentrations of Populus deltoides M. on germination and seedling growth of tomato (Lycopersicon esculentum Mill.), brinjal (Solanum melongena L.) and carrot (Daucus carota L.). Results revealed both stimulatory and inhibitory effects on germination, shoot and root length, number of secondary roots and vigour index. In tomato 10 percent leaf leachate concentration had stimulatory effect on germination andlength of shoot. Length of root, number of secondary roots and vigour index exhibited inhibitory effects with the increase in leaf leachate concentration. In case of carrot stimulatory effect was observed in seed germination percentage upto 30 percent while 10 percent leaf leachate concentration had a stimulatory effect on length of shoot, length of root and vigour index beyond which the performance of characters under study were inhibited.