عنوان مقاله [English]
The use of cover crops before planting the main plant along with selecting the type of tillage can be considered as one of the effective methods in sustainable agriculture. In order to show the efficacy of this system, an experiment was conducted on the treatments barely (Hordeum vulgare L.), rye (Secale cereal L.), rape (Brassica napus L.), vetch (Vicia villosa L.), crimson clover (Trifolium incarnatum L.) and control carry out on no-tillage system using randomized complete block design with three replications on the farms of agriculture and education research center and natural resources of Ardabil Province (Moghan) during the seasonal year 2015-2017. variance analysis showed that the effect of the treatments on the total weed density was significant. On average, in four sampling stages, total control of winter and spring weed for barley, rye, rape, vetch and clover were 83.5,77.25,66,25,51, and 26.25 respectively. The results also showed that the soil cover percentage was significantly affected by the treatments. Decrease in weed density accompanied with the increase in soil coverage and biomass of cover crop. Barley, rye, rape, and clover had the highest biomass. According to the results, the effect of cover crops on maize yield was significant. The amounts of grain yield were 9.12, 8.45, 7.92, 6.93, 6.52 and 6.31 ton/ha for barley, rye, rape, vetch, clover, and control treatments respectively. According to the results of this experiment, cereals can be used in combination with conservation tillage system to achieve the desired yield while controlling weed and reducing chemical inputs.