| Summary: | This study aimed to analyze the quality of chemical and chlorophyll contents of alfalfa plants under different lenghts of irradiation and dose of dolomite on the regosol soil. The experiment was conducted in Greenhouse of the Forage and Pasture Laboratory Faculty of Animal Science University of Gadjah Mada, from May to September 2015. The experiment used a Completely Randomized Design (CRD) 3 x 3 based on two factor of treatments and each with four replications. The first factor was dose of dolomite (D) consisted of 3 treatments (D0 = without dolomite, D1 = dolomite 6 t/hectare or 90 g/polybag and D2 = dolomite 12 t/hectare or 180 g/polybag). The second factor was length of irradiation (C) consisted of 3 treatments (C0 = irradiating 12 hours, C1 = irradiating 14 hours and C2 = irradiating 16 hours). Data found were subjected to analysis of variance and continued with Duncan test at 5% level when significant effect was observed. Parameters measured were the proximate analysis (dry matter, organic matter, crude protein, crude fiber, crude fat, ash) and chlorophyll content. The results showed that there was no significant interaction effect between lenght of irradiation and dose of dolomite treatment on dry matter, organic matter, crude protein, crude fiber, crude fat, ash and chlorophyll contents of alfalfa. Lenght of irradiation were significantly affected (P<0.05) in organic matter and ash contents of alfalfa. Dose of dolomite treatment was not significant on all parameters of the study. The results showed that there was no significant influenced of interactionon the contents of fresh weight, dry weight, dry matter, organic matter, crude protein, crude fiber, crude fat, ash and chlorophyll of alfalfa.
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