Comparative effects of proteases on performance, carcass traits and gut structure of broilers fed diets reduced in protein and amino acids

被引:4
|
作者
Wealleans, Alexandra L. [1 ]
Ashour, Roba Abo [1 ]
Abu Ishmais, Majdi A. [2 ]
Al-Amaireh, Sadiq [3 ]
Gonzalez-Sanchez, David [1 ]
机构
[1] Kemin Anim Nutr & Hlth, B-2200 Herentals, Belgium
[2] Jordan Univ Sci & Technol, Fac Agr, Dept Anim Prod, Irbid 22110, Jordan
[3] Suliman Al Amaireh & Partners Co, Amman 11731, Jordan
关键词
Broiler; Protease enzyme; Growth performance; Gut morphology; Carcass trait; COMPONENT EXOGENOUS PROTEASE; GROWTH-PERFORMANCE; NUTRIENT DIGESTIBILITY; CLOSTRIDIUM-PERFRINGENS; MONOCOMPONENT PROTEASE; GASTROINTESTINAL-TRACT; ASCORBIC-ACID; CHICKENS; SUPPLEMENTATION; RESPONSES;
D O I
10.5187/jast.2023.e20
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
This study aimed to evaluate the effect of supplementing different protease enzymes on growth performance, intestinal morphology, and selected carcass traits in broilers fed diets reduced 3.5% in crude protein (CP) and amino acids (AA). One thousand one-day-old Ross 308 broilers (41 g) were assigned to five dietary treatments with ten replicates of 20 birds each: a positive control (PC) diet formulated to meet Ross 308 AA requirements, a negative control (NC) diet reformulated to provide 3.5% lower CP and AA compared to PC, NC supplemented with a multi-protease (PR1) solution, containing 3 different coated proteases produced from Aspergillus niger, Bacillus subtilis and Bacillus licheniformis, NC supplemented with a serine protease (PR2) produced from Bacillus licheniformis, and NC supplemented with an alkaline protease (PR3) produced from Bacillus licheniformis. At slaughter, 40 birds per treatment were used to assess the effect of the different treatments on carcass traits. At 32 days, samples of the duodenum, jejunum, and ileum of 10 birds per treatment were collected for intestinal morphology evaluation. Birds fed PC and NC supplemented with multi-protease exhibited better (p < 0.05) feed efficiency compared to NC and NC supplemented with all the other protease enzymes. Multi-protease supplementation was linked to the highest (p < 0.05) carcass weight and yield. There were significant differences (p < 0.05) between treatments in all gut segments, with PC, PR1, PR2, and PR3 exhibiting longer villi height (VH) compared to NC. This study demonstrates that 3.5% reduction of CP and AA negatively affected for the overall period feed efficiency, carcass yield, and intestinal morphology. The supplementation of the multi-protease restored feed efficiency and improved carcass yield.
引用
收藏
页码:457 / 470
页数:14
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