Consequences of new approach in production system of commercial layer (Isa Brown) in Iraqi Kurdistan region

Abstract

This was study under taken as a first attempt to investigate the effect of new production system of commercial layer with special emphasis on organic technique. A total 360 one-day-old Isa Brown chicks were obtained from Evan hatchery-Erbil. The birds assigned into 18 indoor pens (2×2 m) for the first 18 weeks . Each pen represented a replicate with 20 chicks. At beginning, birds assigned to the same condition and fed their daily requirements according to Isa Brown guide (2018). The fed as commercial and organic feed. Birds were randomly divided into six treatment groups of three replicates. the treatments were as follows; first treatment (T1): as control birds fed their full requirements according to Isa Brown layers guid (2018), fed commercial feed, reared indoor house, second treatment (T2): birds fed organic feed full requirements according to Isa Brown layers (2018) reared indoor house, third treatment (T3): birds fed 75% of full requirements commercial feed + pasture indoor and outdoor, fourth treatment (T4): birds fed 75% full requirement organic feed + pasture indoor and outdoor, fifth treatment (T5): birds fed full requirements according to Isa Brown layers guide (2018) commercial feed + pasture indoor and outdoor housed, sixth treatment (T6): birds fed full requirements according to Isa Brown layers guide (2018) organic feed + pasture indoor and outdoor housed. At the beginning of week 19, birds had free access to pasture through a hole from indoor to the outdoor except control (T1) and (T2). The outdoor area measured 2 × 10 m (1 m2/bird) for each pen and separated by fence. The outdoor area designed to provide bird a natural behavior and covered with alfalfa(Medicagosativa).The results of this study indicates that commercial strain had higher (P<0.01) haugh unit (73.08),the highest Haugh unit was recorded in T1 72.89.Birds in T2 of commercial strain had higher (P< 0.01) total UFA content 71.42, total n-3 in T4 was 1.80. n-6 was higher in T2 21.48 comparing to the other treatments. Significant differences (p≤ 0.01) for amino acids in commercial eggs found among treatments and T6 content higher percentage of all amino acids. The overall means of profit from only eggs was 197,403 ID and for eggs with hen was 282,208 ID. Significant differences found among treatments for sensory evaluation of commercial eggs. T6 had higher (P<0.01) score of overall acceptances for both commercial eggs.