사료 내 Lysophospholipids의 첨가가 육계의 성장성적, 영양소 소화율, 혈액 성상 및 도체특성에 미치는 영향

학위논문 (석사)-- 서울대학교 대학원 : 농생명공학부, 2014. 8. 김유용.This study was conducted to evaluate effects of dietary lysophospholipids supplementation to low-energy diet on growth performance, nutrient digestibility, blood profiles, and carcass traits in broilers. A total of 300 male (Ross308®) day-old broilers, with an average initial body weight of 47.0 g were allotted to 1 of 5 dietary treatments with 6 replicates and 10 chicks per pen in randomized complete block (RCB) design. The five dietary treatments were : 1) positive control (PCT1): the diet was 3,025 (starter period), 3,150 (grower period), and 3,200 kcal/kg (finisher period) of ME that recommended by the breeding company2) negative control (NCT2): the diets contained less 150 kcal/kg of ME than PC treatment3) T3: NC + lysophospholipids 0.05%4) T4: NC + lysophospholipids 0.10%5) T5: NC + lysophospholipids 0.15%. Results revealed that the birds fed with lysophospholipids had greater body weight (BW), body weight gain (BWG) and better feed conversion ratio (FCR) during grower and finisher periods than that of birds in NC (P0.05). Supplementation of lysophospholipids had a positive effect on digestibility of dry matter (P<0.05), crude protein (P<0.01) and fat (P=0.08) compared with NC. Especially dry matter and crude protein digestibility had were improved by lysophospholipids addition (P<0.01) whereas digestibility of amino acids had no significant difference among treatments. The relative organ weights of abdominal fat, bursa of fabricius, and spleen of birds were not affected by dietary treatments, however, the relative weight of breast muscle was increased with lysophospholipids inclusion (P<0.05). Moreover, at the level of 0.15% lysophospholipids, the relative weight of liver was decreased compared to NC (P