study of allelopathic interaction of wheat (triticum aestivum l.) and some weed species using equal - compartment – agar method

there are many methods for weed management one of them is putting allelopathic and cover crop in weed management programs. in order to study the effect of sowing time (delayed sowing, synchronic sowing) and wheat cultivars (shiraz, roshan, tabasi, niknejad) on allelopathic interaction of wheat and weed species (secale cereale l., avena ludoviciana l.: monocotyledon, convolvulus arvensis l. and vicia villosa l.: dicotyledon), an experiment was conducted with factorial arrangement in a completely randomized design and 4 replications. according to the results, the inhibitory effect of wheat on monocot weeds (oat and rye) was more than in synchronic sowing and the inhibitory effect of wheat on dicot weeds (bindweed and vetch) was more than in delayed sowing. effect of wheat cultivars on rye and oat (except hypocotyls length) was inhibitory and that of vetch was stimulatory. hypocotyls length showed the most sensitivity to released allelochemicals from wheat cultivars, because root has the most contact with allelochemicals in the soil.