<![CDATA[This study compared the internal quality of duck eggs reared under intensive and free-range (umbaran) systems in three villages in Padamara Subdistrict, Purbalingga Regency, in terms of yolk index, albumen index, pH, and yolk color. A Completely Randomized Design (CRD) in a 2x3 factorial arrangement was used, with Rearing System (intensive and free-range) and Village (Karangjambe, Padamara, and Kalitinggar) as the two factors, with three farmers as replications for each treatment combination. Eggs were sampled from 18 farmers, two eggs (duplicates) each, resulting in 36 eggs; duplicate values were averaged as the observation unit. Data were analyzed using analysis of variance (ANOVA) followed by Duncan's Multiple Range Test (DMRT) for factors with more than two significant categories. Results showed that rearing system significantly affected yolk color (P<0.01), with the intensive system producing a more intense yolk color (14.00) than the free-range system (12.00). Village significantly affected albumen index (P<0.01), with Kalitinggar producing the highest albumen index (5.86%), while Padamara (5.14%) and Karangjambe (4.67%) did not differ significantly. Neither rearing system nor village significantly affected yolk index or pH (P>0.05), and the interaction between rearing system and village did not significantly affect any of the four observed variables. It is concluded that rearing system plays an important role in determining yolk color, while agroecological location plays an important role in determining albumen index, whereas yolk index and pH remained relatively stable across all treatment combinations tested.]]>
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