Allelopathic Effect of Dendrocalamus stocksii (Munro.) on Growth and Yield of Paddy

Present investigation was carried out to study the allelopathic effect of solid bamboo Dendrocalamus stocksii on growth and yield of paddy. Bamboo leaf leachate was prepared by soaking the dry leaves in tap water for 24 hours in a ratio of 1: 10 weight by volume. The prepared leachate was diluted to three different concentrations i.e. 25, 50 and 75 per cent by adding tap water accordingly, thus there were five treatments of leachates (control, 25, 50, 75 and 100% concentration). In lab experiment, results revealed that the increasing concentration of the leaf leachates had inhibitory effect on growth parameters (germination, plumule and radicle length) of paddy (Oriza sativa), except the leachates of lower concentration (25 per cent concentration), which had stimulatory effect on plumule length, the effect was concentration dependent. In pot culture experiment the leaf leachates had both stimulatory and inhibitory effect on yield parameters. Stimulatory effect was observed for number of tillers per plant, number of seeds per panicle, test seed weight (except 100 per cent concentration), and straw yield per hectare as compared to control. While inhibitory effect was observed for number of panicles per plant, seed yield per plant (except 50 per cent concentration) and grain yield per hectare (except 50 per cent concentration).