عنوان مقاله [English]
نویسندگان [English]چکیده [English]
A field experiment was conducted as the relay intercropping based on randomized complete block design in a clay-loam soil to study the utility indices of intercropping versus sole cropping and exploitation of farming environment at Research Farm of the Faculty of Agriculture, Lorestan University with three replications. Treatments were sole cropping of triticale (100%) with density of 400 plant m-2, broadleaf vetch-triticale mixtures with 70:30, 60:40, 50:50, 40:60 and 30:70 ratios and sole cropping of broadleaf vetch (100%) with density of 150 plant m-2. In this experiment forage yield for each plant and total dry forage yield with some utility indices like land equivalent ratio (LER), competition ration (CR), actual yield loss (AYL), area-time equivalent ratio (ATER) and E (mean of area-time equivalent ratio) were measured. Results showed that the highest dry forage yield of both plants was related to 70:30 and 30:70 of seed mixtures (4.122 and 3.035 t ha-1, respectively), but considering utility indices, total LER was greater than 1 and is the indicator of advantage of intercropping vs sole cropping. AYL was different for both studied crops. The highest utility of E for vetch (1.29) achieved from 60:40 cropping mixture and for triticale (1.46) was related to 70:30 mixture. Thus, in spite of suitable forage production by other treatments, it is concluded that 60:40 and 70:30 mixtures were the best treatments considering utility indices, forage yield and exploitation of natural resources.