Effect of Lysophospholipids Supplementation on Growth Performance, Nutrient Digestibility, Blood Profiles and Carcass Traits in Broilers

Abstract

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 (PC

T1): 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 company

2) negative control (NC

T2): the diets contained less 150 kcal/kg of ME than PC treatment

3) 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 (P<0.01). The supplementation of lysophospholipids showed positive responses to BW, BWG and FCR during grower, finisher and overall periods (P<0.01). But no significant difference was detected in feed intake (FI) throughout the entire experimental periods (P>0.05). 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<0.05). No significant differences were observed in aspartate transaminase, total cholesterol, triglyceride, low density lipoprotein cholesterol and high density lipoprotein cholesterol among treatments. Consequently, dietary lysophospholipids could be used to low energy diet of broilers in order to improve growth performance, feed efficiency, carcass compositions with improvement of nutrients digestibility and without any detrimental effects on lymphoid and metabolic function of organ.