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All Journal Journal of Tropical Animal Science and Technology
Akbar Satria Bahari
Fakultas Peternakan, Universitas Jenderal Soedirman, Purwokerto
Agriculture, Biological Sciences & Forestry

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The Effect of Acetic Acid Solution Application on Duck Eggs Shell Strength and Incubation Duration During the Critical Hatching Period Akbar Satria Bahari
Journal of Tropical Animal Science and Technology Vol. 8 No. 1 (2026): Journal of Tropical Animal Science and Technology
Publisher : Animal Science Study Program, Faculty of Agriculture, Science and Health, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/jtast.v8i1.9446

Abstract

This study aimed to investigate the effect of different levels of acetic acid solution application on duck eggs on eggshell strength and hatching time. The materials used in this study were 180 hatching duck eggs (1–7 days old, weighing 65–75 g) from 16–18week old parent ducks. An experimental method with a Completely Randomized Design (CRD) was employed as the research design. The study consisted of three acetic acid treatment groups (P0: 0%, P1: 10%, P2: 20% acetic acid) and 6 replicates, with each experimental unit using 10 eggs. The variables measured in this study were eggshell strength (MPa) and egg hatching time (hours). Eggshell strength and hatching time data were analyzed using analysis of variance (ANOVA) and orthogonal contrast as a post-hoc test. The results showed the mean values of eggshell strength (MPa) for each treatment as follows: P0 (0.233 ± 0.022), P1 (0.125 ± 0.013), and P2 (0.144 ± 0.031); and hatching time (hours): P0 (650.438 ± 9.714), P1 (622.438 ± 5.519), and P2 (635.503 ± 2.182). Analysis of variance revealed a highly significant difference (P<0.01) in both variables due to the acetic acid application. Orthogonal contrast tests showed no significant difference in eggshell strength between treatments P1 and P2, while there was a highly significant difference (P<0.01) in hatching time between P1 and P2. It can be concluded that acetic acid application significantly reduces eggshell strength and accelerates the hatching of duck eggs. The treatment with a 10% acetic acid concentration demonstrated the most optimal effectiveness in accelerating hatching.
Quantitative Factors of Production Parameters Affecting Broiler Performance Index Akbar Satria Bahari; Novie Andri Setianto; Yusmi Nur Wakhidati; Elly Tugiyanti; Rahayu Widiyanti
Journal of Tropical Animal Science and Technology Vol. 8 No. 1 (2026): Journal of Tropical Animal Science and Technology
Publisher : Animal Science Study Program, Faculty of Agriculture, Science and Health, Universitas Timor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32938/jtast.v8i1.9759

Abstract

This study aims to analyze the effects of quantitative production parameters on the Performance Index (PI) of broiler chickens. Five key variables were examined: mortality, culling, feed conversion ratio (FCR), final body weight, and harvesting age. The analysis utilized secondary historical data from 17 production cycles of broiler chickens at PT XYZ between 2021 and 2023. Multiple linear regression was employed after satisfying classical assumption tests. Results indicate that all independent variables significantly influenced PI both simultaneously (p < 0.05) and partially. The adjusted R-squared value of 99.81% demonstrates that the model explains nearly all variation in the performance index. Partially, final body weight had the highest positive impact on PI (coefficient +223.11), followed by FCR (-184.84), harvesting age (-10.41), culling (-3.61), and mortality (-3.238), all with negative effects. These findings highlight the critical role of production parameter control in optimizing broiler performance efficiency.
Co-Authors Elly Tugiyanti Novie Andri Setianto Rahayu Widiyanti Wakhidati, Yusmi Nur