The Effect of Mungbean (Vigna radiata L.) Living Mulch on Weeds Management and Yield and Yield Components of Corn (Zea mays L.)

In order to evaluate effect of mungbean living mulch on weeds management and yield and yield components of corn an experiment was done as a split plot based on randomized complete block design with four blocks in Research Field of Department of Agronomy, Karaj Branch, Islamic Azad University in June 2010. Experiment have two factors that the first was different time of mungbean suppression in four levels (4, 6, 8 and 10 leaves stages of corn) and controls that contains without weeding plots and complete weeding plots as main plot and second was different densities of mungbean in three levels (50%, 100% and 150% more than optimum density) as subplot. Result indicate that effect of different time of mungbean suppression had significant difference (P>0/01) on grain yield, biological yield, harvest index, 1000 grain weight, weed density and weed total dry weight. Also effect of different densities of mungbean had significant difference (P>0/01) on grain yield, harvest index, weed density and weed total dry weight, but had no significant difference on biological yield and 1000 grain weight. Interaction effect of different time of mungbean suppression and different densities of mungbean had significant difference on grain yield, biological yield and weed total dry weight. Grain yield highest level obtained at plots which treated by spraying 2,4-D at 8-leave corn stage and 50% mungbean density, with average of 10342/16 kg/ha and grain yield lowest level obtained at without weeding control plots by 150% mungbean density, with average of 4674/57 kg/ha. Weeds total dry weight lowest level obtained at plots which treated by spraying 2,4-D at 8-leave corn stage and 150% mungbean density, with average of 58/55 gr/m2 and Weeds total dry weight highest level obtained at without weeding control plots and 50% mungbean density, with average of 162/15 gr/m2. Weeds density lowest level obtained at plots which treated by spraying 2,4-D at 8-leave corn stage and 150% mungbean density, with average of 24/50 gr/m2 and Weeds density highest level obtained at without weeding control plots and 50% mungbean density, with average of 79/50 gr/m2.