Penelitian ini bertujuan untuk mengetahui perbedaan morfometrik organ pencernaan ayam ras petelur antara sistem pemeliharaan intensif dan free-range. sebanyak 30 ekor ayam (Isa Brown) berumur 18 – 22 minggu dipeliharan dengan sistem intensif dan free-range. Metode dalam penelitian ini merupakan penelitian eksperimental menggunakan uji-t dengan membandingkan dua sistem pemeliharaan intensif dan free-range. Penelitian dilaksanakan dengan dua model pemeliharaan dengan mengelompokkan ayam berdasarkan nilai HRFI dan LRFI dari pemeliharaan sistem intensif dan free-range. Hasil penelitian menunjukkan bahwa terdapat perbedaan signifikan pada morfometrik organ pencernaan ayam ras
petelur terhadap panjang jejenum, ileum, rektum dan bobot ileum (P<0.05) namun tidak berpengaruh terhadap panjang esophagus, crop, proventriculus, gizzard, duodenum sekum, cloaka dan bobot esophagus, crop, proventriculus, gizzard, duodenum, jejenum, sekum, rektum dan cloaka. Dapat disimpulkan bahwa terdapat perbedaan signifikan terhadap morfometrik organ pencernaan ayam ras petelur pada pemeliharaan sistem intensif dan free-range, yang di pengaruhi oleh adanya pakan alami dan serat kasar yang tinggi dari hijauan pada sistem free-range. Perlu dikaji lebih lanjut mengenai faktor lain yang mempengaruhi morfometrik organ pencernaan ayam ras petelur pada sistem intensif dan free -range.
This study aimed to determine the morphometric differences in the digestive organs of laying hens between intensive and free-range rearing systems. As many as 30 laying hens (Isa Brown) aged 18 – 22 weeks were reared using an intensive and free-range system. The method in this research is experimental research using the t-test by comparing two intensive and free-range system maintenance systems. The research was carried out with two rearing models, at the end of the rearing, 4 samples were taken from the HRFI and LRFI values. The results of the study showed that there were significant differences in the morphometrics of the digestive organs of laying hens on the length of the jejunum, ileum, rectum and ileum weight (P<0.05) but had no effect on the length of the esophagus, crop, proventriculus, gizzard, duodenum, cecum, cloaca and weight of the esophagus, crop, proventriculus, gizzard, duodenum, jejunum, cecum, rectum and cloaca. It can be concluded that there are significant differences in the morphometrics of the digestive organs of laying hens in intensive and free-range systems, which are influenced by the presence of additional feed and high crude fiber from forage in the free-range system. It is necessary to study further regarding other factors that influence the morphometrics of the digestive organs of laying hens in intensive and free-range systems