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

the trial randomized complete block design with four replications in summer 1394 in a farm located in the share ray to study the effects of different methods of weed control on the yield and quality of forage maize varieties (sc.704) was performed. the experiment consisted of black plastic mulch, black plastic mulch silver, vetch cover crop with a density of 100 per cent, with 50 per cent vetch cover crop, herbicide cruise (2 lit.ha-1), herbicide ultima (175 g.h-1), integrated control (silver on black plastic mulch + herbicide cruise with 1 lit. ha-1), full control complete with hand weeding and weed interference, respectively. 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 statistically significant differences in traits between control compilation and use of silver plastic mulch on black (t2) did not exist. most corn forage yield (31.83 t.ha-1) in the control group consolidated and then black plastic mulch treatments (29.88 t.ha-1) was produced, respectively 41 and 32 percent higher than the yield on hand weeding were. reducing the number and weed biomass using plastic mulch both alone and in combination with herbicide cruise significant and leads to control weeds was 98 percent. so if there are the necessary facilities including mulching equipment and drip irrigation systems, plastic mulch can be a good alternative to herbicides