饲粮中添加单月桂酸甘油酯对肉鸡生长性能、消化能力及鸡肉营养品质的影响

为研究饲粮中添加单月桂酸甘油酯（glycerol monolaurate，GML）对肉鸡生长性能、消化能力及鸡肉营 养品质的影响，以1 日龄三黄鸡为研究对象，在饲粮中添加150 mg/kg GML饲喂49 d后分析肉鸡生长性能、肠道结 构、营养成分表观代谢率及鸡肉中营养成分含量的变化。结果表明：与对照组相比，150 mg/kg GML饲喂可以显著 提高肉鸡22～49 d的饲料转化率；显著提高十二指肠、空肠、回肠的肠段长度，空肠的绒毛长度和十二指肠、空肠 的绒隐比（绒毛长度/隐窝深度），并显著提高肉鸡粗蛋白、铜和钙的表观代谢率；显著提高鸡肉中C18:2、C20:4、必 需脂肪酸、多不饱和脂肪酸的比例，以及粗蛋白、赖氨酸、天冬氨酸、谷氨酸、酪氨酸、鲜味氨基酸和总氨基酸的 含量。总体来看，GML饲喂对提高肉鸡生长性能、消化能力和鸡肉营养品质具有积极的作用。

Effect of Dietary Supplementation with Glycerol Monolaurate on Growth Performance,Digestive Ability and Chicken Nutritional Components of Broilers

This study was designed to determine the effect of dietary supplementation with glycerol monolaurate (GML) on the growth perfo4rmance, digestive ability and chicken nutritional compounds of broilers. For this purpose, 1-day-old broilers were fed on a basal diet with or without 150 mg/kg GML for 49 d and the growth performance, intestinal structure, nutrient apparent metabolic rate of broilers and chicken nutritional compounds were measured during this period. The results showed that compared with the control, the GML group could significantly improve feed conversion rate from day 22 to day 49, increased the length of duodenum, jejunum and ileum, villus length in the jejunum and villus height to crypt depth ratio in the duodenum and ileum, and elevate the apparent metabolic rate of crude protein, cuprum and calcium. In addition, dietary GML supplementation significantly increased the relative levels of C18:2 and C20:4, essential fatty acids and polyunsaturated fatty acids in chicken, as well as the contents of crude protein, lysine, aspartate, glutamate, tyrosine, flavor amino acids and total amino acids. In conclusion, dietary GML supplementation could improve the growth performance, digestive ability and meat nutritional compounds of broilers effectively.