Effect of Plastic mulch and bed system on maize (zea mays) yield and weeds suppression

In order to evaluate effect of mulch and bed formation on yield quantity of corn and compete between weeds an experiment were conducted in 2011-2012 in field research of Islamic Azad University, Varamin branch. Experiment were in form of split plot based on complete block design with three replications. Bed cultivation in three level (flat, top and furrow) in main plot, mulch in three level (white plastic on dark, no mulch and control weed, no mulch with weed) in sub plot. The results showed that up to 8-leaf stage, the maximum leaf area, plant height, stem diameter at the soil surface and dry weight was observed in the context of Faro. White on black plastic mulch for all forms of bed control weed up to 99%. Mulch leads to grow corns faster than the ground without mulch and mulch interaction was significant in the context of maximum yield in the mulch bed treatment bed (1103.61kg ha-1) were obtained. Results showed that bed form had significant effect on Harvest Index, grain yield, seed in ear, seed in row, row number. Mulch had significant effect on total biomass, harvest index, grain yield, seed in ear, seed in row, row number. Highest amount of seed in ear, row in ear for flat bed and highest thousand seed weight and row in ear for top bed. Increasing seed in ear, seed in row and row number by using mulch and therefore seed number increased.