<![CDATA[This study aimed to evaluate the effect of dietary supplementation with lemon basil leaf powder (Ocimum basilicum L.), commonly known as selasih, on the production performance of laying quails. A total of 200 six-week-old female quails were used in a five-week feeding trial consisting of four dietary treatments with five replicates. The treatments consisted of T0 (commercial diet without lemon basil leaf powder), T1 (commercial diet with 1.5% lemon basil leaf powder), T2 (commercial diet with 3.0% lemon basil leaf powder), and T3 (commercial diet with 4.5% lemon basil leaf powder). The observed parameters included feed intake, egg production, egg mass, feed conversion ratio (FCR), and mortality. The experiment was arranged using a Completely Randomized Design (CRD), and the data were analyzed using one-way analysis of variance (ANOVA). The results showed that dietary supplementation with lemon basil leaf powder up to 4.5% had no significant effect (P>0.05) on feed intake, egg production, egg mass, or FCR of laying quails. Feed intake ranged from 24.22 to 24.68 g quail⁻¹ day⁻¹, egg production ranged from 65.03% to 70.35%, egg mass ranged from 10374.78 to 11123.70 g, and FCR ranged from 2.18 to 2.31. No mortality was observed during the experimental period across all treatments. These findings indicate that lemon basil leaf powder can be safely included in the diet of laying quails, as indicated by the absence of mortality and no adverse effects on feed intake, egg production, egg mass, and FCR.]]>
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