the selection of most suitable combination in mixed cropping of hairy vetch with barley or triticale under zanjan rainfied conditions

in order to evaluate quantity and quality hairy vetch (vicia villosa l.) yield in the pure and mixed cropping with barley (hordeum vulgare l.) and triticale (triticosecale) the experiment was conducted at agricultural research station (khodabande) under dryland conditions during 2006 -2008. field experiments were arranged in a randomized complete blocks design with 9 treatments in four replications. hairy vetch, triticale and barely monocultures as well as mixtures of hairy vetch, with each of the cereals in three seeding ratios (3:1, 1:1 and 1:3) were used as experimental treatments. the combined analysis relieved that the main effects of year, treatments and interaction between treatments × year  on green forage yield, dry matter yield, nitrogen accumulation and crude protein yield were significant (p< 0.01). between the two pure stands of cereals the highest green forage yield (5.49 t/ha), dry matter yield (2.36 t/ha) and crude protein yield (178.7 kg/ha) was obtained from barley but there were no significant differences between barley and triticale. by increasing barley and triticale rations in mixtures, the forage quantity and quality were increased. the results of this study indicated that among mix cropping treatments, the mixture ratio of 25% hairy vetch + 75% barley, with having 2.48 t/ha dry matter yield, 202.3 kg/hacrude protein yield and 1.51 land equivalent ratio was suitable ratio for planting in dry land condition