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The productivity of ducks has not been optimum due to the high cost of protein source feed. Azolla microphylla is considered weeds and has not been widely utilized. This study was designed to find out, and study feed alternatives that can substitute protein in duck feed. The research material used was 40 Magelang ducks at five weeks of age, which were grouped into four treatments, where: (P0) control without substitution of Azolla microphylla, (P1) 10% substitution Azolla microphylla, (P2) 15% substitution Azolla microphylla, and (P3) 20% substitution Azolla microphylla. The experimental design in this study was a non-factorial Complete Randomized Design (RAL). Variables observed were carcass weight and carcass percentage. Data were analyzed using 95% significance of variance analysis (ANOVA), and significant differences were analyzed with Duncan's Multiple Range Test (DMRT). Substitution of Azolla microphylla in feed influenced carcass weight (729.9±90.9a – 912.9±14.6b grams/head) but did not affect the percentage of the carcass (55.48±5.09 – 61.16±2.14). This study concludes that substituting Azolla microphylla at the proportion of 20% is still considered safe to produce a standard percentage of carcass.
Ahmad et al. (Thu,) studied this question.