Abstract
In bioassays, allelopathic activity of leaf, root and soil extracts of Albizia procera (Roxb). Benth. was studied on germination, growth, nodulation and biochemical changes in Glycine max (L.) Merr. (soybean). In second study, effect of nitrogen along with extracts was studied. Chemical analysis of A. procera leaves revealed presence of good amount of phenolics, flavonones, terpenoids and glycosides. High Performance Liquid Chromatography revealed presence of four phenolic acids in root, six in leaf and five in soil extracts of A. procera. The leaf, root and soil extracts of A. procera promoted germination, radicle growth, shoot length, nodulation, seed protein and chlorophyll ‘b’ of soybean, however, adverse effect was exhibited on leaf carbohydrate, plumule length and ascorbic acid content of soybean leaf. Nitrogen application with extracts reduced germination, shoot length, root length, nodulation, leaf protein, carbohydrate and ascorbic acid content as compared to extracts alone.
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