The evaluation of the Allelopatic effects of barley biomass on thin leaves weed suppressing in mung bean (Vigna radiate L.)

In order to evaluate the Allelopatic effects of barley biomass (derived from differentphonological stages) on thin leaves weed suppressing in mung bean (Vigna radiate L.)production a field experiment was carried out in Shahr-e Rey the Islamic Azad Universitytraining-research field (2005-2006) using factorial experiment based on Randomizedcomplete blocks design with four replications. Experimental treatments obtained fromfactorials of barley biomass rates (2, 4, 6, and 8 t/ha) and their age (biomass derived fromtillering, stem elongation, heading, soft dough stages and straw after barley harvest). Barley biomass incorporated to the soil before seed bed preparation procedures for mung bean.Results showed that biomass age factor had significant effect on thin leaves weed control.Also all levels of barley biomass decreased weed fresh and dry weight. Mung bean seedyield significantly affected by biomass age. The highest amount of seed yield (87.10 g/m2)obtained under the use of heading biomass barley to mung 4 t/h effect. So regarding toenvironmental pollution of the south of Tehran which created by over the use of chemicalfertilizers and pesticides, the application of barley biomass to decrease weed growth ishighly recommended.