Mun Jun Young, Tajudeen Habeeb, Ha Sang Hun, Lee Jun Hyung, Lokhande Anushka, Ingale Santosh Laxman, Kim Jin Soo, Kim Min Ju
Department of Animal Industry Convergence, Kangwon National University, Chuncheon, 24341, Korea.
Department of Animal Biosciences (ABSc), University of Guelph, Guelph, ON N1G 2W1, Canada.
Anim Biosci. 2025 Jan;38(1):131-141. doi: 10.5713/ab.24.0233. Epub 2024 Oct 24.
This study evaluates the collaborative effect of exogenous enzyme blend and dietary nutrient density on the performance of broiler chicken.
A total of 600 Ross 308 broiler chickens with same average initial body weight were randomly assigned to 5 treatments. Each treatment contained 8 replicates, and 15 birds per replicate. The diets included a control (CON) starter/finisher (S/F) diet with metabolizable energy (ME) 3,100/3,200 in Kcal/kg and crude protein (CP) content 22.0.0/20.00 in % as (S/F 3,100/3,200 Kcal/kg + CP [22.00/20.00]%), S/F with ME 3,060/3,150 Kcal/kg + CP (21.50/19.50)% with and without the exogenous enzyme blend as (S/F 3,060/3,150 Kcal/kg + [21.50/19.50]% with, and without the exogenous enzyme blend), and lastly, S/F with ME 3,010/3,100 Kcal/kg + CP (21.50/19.50)% with, and without the exogenous enzyme blend as (S/F 3,010/3,100 Kcal/kg + [21.50/19.50]% with, and without the exogenous enzyme blend). The impact of the treatments was tested on growth performance, nutrient digestibility, blood metabolites, intestinal microflora, and morphology of broiler chicken.
The inclusion of exogenous enzyme blend in the nutrient-deficient diet S/F 3,060/3,150 + 21.50/19.50 increased (p<0.05) broilers body weight, feed conversion ratio, nutrient digestibility of CP, gross energy, phosphorus, and blood phosphorus, with tendency (p<0.10) of higher dry matter. The treatment also showed lower (p<0.05) total anaerobic bacteria, coliform, and higher (p<0.05) villus height (VH) in the jejunum, with tendencies (p<0.10) of higher lactobacillus in the ileum and caecum, and higher tendency (p<0.10) of VH in duodenum and ileum.
We concluded that the improved performance could be attributed to the potency of S/F 3,060/3,150 + 21.50/19.50 supplemented with 0.05% of the multienzyme to reduce the level of potential pathogenic bacteria with an increased level of positive bacteria, which in turn creates an enabling intestinal villi structure in broiler chicken.
本研究评估外源酶混合物与日粮营养密度对肉鸡生产性能的协同作用。
将600只平均初始体重相同的罗斯308肉鸡随机分为5个处理组。每个处理组有8个重复，每个重复15只鸡。日粮包括对照（CON）的开食/育成（S/F）日粮，代谢能（ME）为3100/3200千卡/千克，粗蛋白（CP）含量为22.00/20.00%（S/F 3100/3200千卡/千克 + CP [22.00/20.00]%），ME为3060/3150千卡/千克 + CP（21.50/19.50）%且添加或不添加外源酶混合物的S/F日粮（S/F 3060/3150千卡/千克 + [21.50/19.50]%添加和不添加外源酶混合物），以及最后，ME为3010/3100千卡/千克 + CP（21.50/19.50）%且添加或不添加外源酶混合物的S/F日粮（S/F 3010/3100千卡/千克 + [21.50/19.50]%添加和不添加外源酶混合物）。测试这些处理对肉鸡生长性能、养分消化率、血液代谢物、肠道微生物群和肠道形态的影响。
在营养缺乏的日粮S/F 3060/3150 + 21.50/19.50中添加外源酶混合物可提高（p<0.05）肉鸡体重、饲料转化率、CP、总能、磷的养分消化率以及血液磷含量，干物质含量有升高趋势（p<0.10）。该处理还使空肠中总厌氧菌、大肠菌数量降低（p<0.05），空肠绒毛高度（VH）升高（p<0.05），回肠和盲肠中乳酸杆菌数量有升高趋势（p<0.10），十二指肠和回肠中VH有更高的升高趋势（p<0.10）。
我们得出结论，性能的改善可归因于在S/F 3060/3150 + 21.50/19.50中添加0.05%的复合酶能够降低潜在病原菌水平，同时增加有益菌水平，进而在肉鸡中形成有利的肠绒毛结构。
