PRODUKTIVITAS AYAM PETELUR STRAIN ISA BROWN TERHADAP PERBEDAAN TIER SATU DAN TIER TIGA PADA FASE GROWER DI KANDANG CLOSED HOUSE LOKASI SLOROK FARM KABUPATEN BLITAR

This study aimed to evaluate the effect of different tiers on the productivity of Isa Brown strain laying hens in the grower phase in a closed house cage at Slorok Farm, Blitar Regency. The study was conducted for 4 weeks, using a sample of 204 chickens divided into two groups based on tier, namely tier 1 (bottom) and tier 3 (top). Data collected included body weight gain and chicken uniformity. Statistical analysis used an unpaired T-test to compare the results between the two tiers. The results showed that the average body weight gain of chickens in tier 1 was 107.92 grams, while in tier 3 it was 106.21 grams. However, this difference was not statistically significant (P>0.05). The uniformity of chicken body weight in tier 1 and tier 3 also showed no significant difference, with an average uniformity value of 92.39% for tier 1 and 91.42% for tier 3. Comfortable ambient temperature in closed house cages is an important factor affecting good uniformity results. This study concluded that different tiers in a closed house cage did not have a significant effect on the productivity of Isa Brown strain laying hens in the grower phase. This finding provides insight for farmers to optimize cage management without having to worry about the significant effect of tier differences on chicken performance.