This experiment was conducted to study the effects of soybean lecithin emulsifier supplementation in two energy level diets on growth performance, nutrient availability and serum biochemical indices of broilers. A randomized complete block design with 2?2 factors was adopted in the experiment and 960 one-day-old Cobb 500 male broilers were randomly assigned to 4 groups with 6 replicates in each group and 40 birds in each replicate. Chickens were fed the experimental diets composed of two energy levels and two emulsifier supplementation levels. Dietary metabolizable energy levels were 12.13 and 11.92 MJ/kg for chickens at 1 to 21 days of age, and were 12.96 and 12.65 MJ/kg for chickens at 22 to 49 days of age. Meanwhile, the supplementation levels of emulsifier were 0 and 265 mg/kg for chickens at 1 to 21 days of age, and were 0 and 400 mg/kg for chickens at 22 to 49 days of age. Growth performance of chickens, apparent availability of energy, dry matter, crude protein and crude fat, as well as contents of glucose, lipids and bile acid were measured in the experiment. The results showed that the average daily gain of broilers at 1 to 21 days of age fed normal energy diet was significantly higher than that of broilers fed low energy diet (P<0.01), and the feed/gain of broilers at 1 to 49 days of age fed low energy diet with emulsifier supplementation could reach that the level of broilers fed normal energy diet. The supplementation of emulsifier in diets could increase the average daily gain and the apparent availability of ether extract and energy of diets, promote bile secretion, and significantly decrease the feed/gain of broilers at 1 to 21 days and 1 to 49 days of age (P<0.05). In conclusion, the decrease of dietary energy can significantly decrease the average daily gain of broilers at 1 to 21 days of age, and increase feed/gain of broilers at 1 to 21 days and 1 to 49 days of age; the supplementation of emulsifier in diets can improve feed efficiency, especially in low energy diets of broilers at 1 to 21 days of age.
HU Ling
,
ZENG Qiufeng
,
DING Xuemei
,
ZHE Li
,
ZHANG Keying
,
WU Xiuqun
. Diets Supplemented with Soybean Lecithin Emulsifier Affect Growth Performance, Nutrient Availability and Serum Biochemical Indices of Broilers[J]. Chinese Journal of Animal Nutrition, 2012
, 24(10)
: 1928
-1938
.
DOI: 10.3969/j.issn.1006-267x.2012.10.012
[1] MOSSAB A,HALLOUIS J M,LESSIRE M.Utilization of soybean oil and tallow in young turkeys compared with young chickens[J].Poultry Science,2000,79:1326-1331.
[2] GUERREIRO NETO A C,PEZZATO A C,SARTORI J R,et al.Emulsifier in broiler diets containing different fat sources[J].Brazilian Journal of Poultry Science,2011,13(2):119-125.
[3] 谭权,张克英,丁雪梅.木聚糖酶对肉鸡能量饲料养分利用率和表观代谢能值的影响[J].动物营养学报,2008,20(3):311-317.
[4] ALAO S J,BALNAVE D.Nutritional significance of different fat sources for growing broilers[J].Poultry Science,1985,64:1602-1604.
[5] DEATON J W,LOTT B D.Age and dietary energy effect on broiler abdominal fat deposition[J].Poultry Science,1985,64:2161-2164.
[6] DONALDSON W E.Lipogenesis and body fat in chicks:effects of calorie-protein ratio and dietary fat[J].Poultry Science,1985,64:1199-1204.
[7] 蔡泽华,郭建同.肉用仔鸡日粮添加棕榈油饲养试验[J].福建畜牧兽医,2000,22(5):4-5.
[8] AL-ATHARI A K,GUENTER W.The effect of fat level and type on the utilization of triticale(cultivar Carman)by broiler chicks[J].Animal Feed Science and Technology,1989,22(4):273-284.
[9] 李杰,许振英.能量水平对轻重型鸡生长发育、体成分及营养物质利用的影响[J].畜牧兽医学报,1990,21(3):216-221.
[10] 井文倩.三类型黄羽肉鸡适宜能量水平的比较研究.硕士学位论文.泰安:山东农业大学,2002:18-21.
[11] KOLLÁROVÁE,SALAGOVÁ Z.Effect of energy intake on lipid profile in pigs[J].Acta Fytotechnica et Zootechnica,2001,4:176-177.
[12] 米玉玲,王安.低温高能饲粮对笼养产蛋鸭生产性能及生化指标的影响[J].动物营养学报,2003,15(1):21-25.
[13] 张炳坤,李海涛,赵冬琴,等.溶血卵磷脂提高肉仔鸡对禽脂的表观消化率[J].动物营养学报,2010,22(3):662-669.
[14] 秦全忠.外源性脂肪乳化剂饲喂肉仔鸡的试验[J].饲料研究,2007(10):51-55.
[15] POLIN D,WING T L.The effect of bile acids and lipase on absorption of tallow by young chicks[J].Poultry Science,1980,59:2738-2743.
[16] KUSSAIBATI R,GUILLAUME J,ECLERCQL B.The effects of age,dietary fat and bile salts,and feeding rate on apparent and true metabolisable energy values in chickens[J].British Poultry Science,1982,23:393-403.
