目的:本研究评估了亚麻籽粕被蛋白酶降解的效果,植物乳杆菌,或者两者兼有增长表现,营养素消化率,和肉鸡的健康状况。
方法:有四种日粮含有非降解形式的亚麻籽粉(对照,CON),用3,000U/kg蛋白酶降解(酶,ELM),1.0×109CFU/kg植物乳杆菌(发酵,FLM),或两者(双重降级,DLM)。每种形式的亚麻籽粉以饮食的15%添加。将480只22d龄的黄羽肉鸡分为4组,每组6只,每组20只鸡。饲喂试验持续42d。生长性能,表观粪便消化率(干物质,能源,粗蛋白,和灰),在42和63d时测定血清免疫球蛋白和抗氧化酶。
结果:结果表明,ELM,FLM,DLM增加(p<0.001)肽的含量,减少(p<0.001)氰苷,与CON相比。在整个饲喂试验中,亚麻籽粉降解的日粮增加了(p<0.05)采食量和体重增加,和能量的消化率,粗蛋白,和灰分在喂养试验结束时。此外,所有降解组通过增加血清免疫球蛋白A和G来增强(p<0.05)肉鸡健康状况。与ELM或FLM相比,DLM对这些参数显示出更明显的影响(p<0.05)。
结论:亚麻籽粉通过酶解降解,发酵,或两者都改善了肉鸡的营养和应用。
OBJECTIVE: The present study evaluated the effect of flaxseed meal degraded by a protease, Lactobacillus plantarum, or both on the growth performance, nutrient digestibility, and health status of broilers.
METHODS: There were four diets containing flaxseed meals in its non-degraded form (control, CON), degraded with 3,000 U/kg of protease (enzymatic, ELM), 1.0×109 CFU/kg of Lactobacillus plantarum (fermented, FLM), or both (dual-degraded, DLM). Each form of flaxseed meals was added at 15% of diet. A total of 480 yellow-feathered broilers at 22 d of age were distributed into 4 groups with 6 replicates of 20 chickens each. The feeding trial lasted for 42 d. Growth performance, apparent fecal digestibility (dry matter, energy, crude protein, and ash), and serum immunoglobins and antioxidases were determined at 42 and 63 d of age.
RESULTS: Results showed that ELM, FLM, and DLM increased (p<0.001) the contents of peptides and decreased (p<0.001) cyanogenic glycosides, compared to CON. The diets with degraded flaxseed meals increased (p<0.05) feed intake and body weight gain throughout the feeding trial, and the digestibility of energy, crude protein, and ash at the end of feeding trial. Furthermore, all degraded groups enhanced (p<0.05) broiler health status by increasing serum immunoglobulins A and G. Additinally, DLM showed more pronounced effects (p<0.05) on these parameters than ELM or FLM.
CONCLUSIONS: Flaxseed meals degraded by
enzymolysis, fermentation, or both had improved nutrition and application in broilers.