effects of different methods of weed control on the qualitative and quantitative yield corn

the trial randomized complete block design with four replications in summer 1394 on a farm in the village of dotuyeh, kahrizak district located in the share ray to study the effects of different methods of weed control on qualitative and quantitative yield forage corn varieties (sc.704) do was. the experiment consisted of black plastic mulch, on black plastic mulch silver, mung bean living mulch with a density of 100 percent, with 50 percent mung bean living mulch, herbicide cruz with a dose of 2 liters per hectare, herbicide ultima dose of 175 grams per hectare, combined controlling (silver on black mulch and herbicide cruz at half the recommended dose), complete control with hand weeding and weed interference were full. the results showed that the effect of treatments on all traits including plant height, leaf dry weight, forage yield and quality traits of corn at different levels was significant. treatments assessment showed that combined controlling (t7) the protein component traits, influence and significant advantages compared with other treatments received. although are statistically significant differences in traits between control compilation and use of silver plastic mulch on black (t2) did not exist. the highest yield of forage corn (31.83 t.ha-1) in the control group compilations, and then the black plastic mulch treatments (29.88 t.ha-1) was produced, respectively 41 and 32 percent higher than the yield on hand weeding. reducing the number and weed biomass using plastic mulch both alone and in combination with herbicide cruz was considerable and resulted in weed control was 98 percent. so if there is the necessary facility including mulching equipment and drip irrigation systems, plastic mulch can be a good alternative to herbicides.