مهدی رسولی ونجانی

In order to study the effect of different densities on the quantitative and qualitative characters of the two cultivars of alfalfa in condition of Alley Cropping system an experiment was done in the experimental field of Agriculture College¡ Karaj unit in the years 1388-1389. It was done in the form of split factorial in randomized complete block designin two rep.The treatment were: two cultivars (Hamedani alfalfa and ghare alfalfa)¡ and five density(5¡10¡15¡20¡25 kg/ha)¡ and three harvest¡ in thisexperiment cultivars were main plot¡ density and crop were sub plot. The measured character included the percentage of Crude protein of leaf and steam¡leaf and steam Fiber¡ Fresh weight¡ Dry weight and total yield protein. The results corresponding to the analysis of variance showed that the interaction of density had a significant effect on crud protein of steam at= 1% and had a significant effect on steam fiber at p=5% .The result of mean contrast of stages effect showed that the stages had a significant effect on other character at p=1%. The interaction of density* stage had a significant effect on leaf total fiber at p=5%.The result corresponding to the analysis of variance showed that the interaction of density on crude protein of steam in density levels 4 and 5 were about 12/97¡ 12/81had highest means and levels 1and 3 had the least percentage. Total fiber in steam was oposite¡level 1 had the least. Also stage three had highest percentage of crud protein of leaf (32/06) and steam about (14/28).The stage two had the least percentage of crud protein leaf and steam (25/41)¡(12/6). Highest fresh weight was in stage three(4782/8 kg/ha) and stage one had the least fresh weight and dry weight (2270/6 kg/ha)¡(668/41). The highest dry weight was in stage two it was about (1509/88 kg/ha). Moreover the highest and lowest proteinyield corresponding to the second stage(293/35) and first stage (140/56). Stage effect showed first stage had highest Fiberpercentage of leaf (27/64) and steam (41/18).