Multiprotease supplementation in laying hen diets: Impact on performance, egg quality, digestibility, gut histomorphology, and sustainability

被引：0

作者：

Oketch, Elijah Ogola ^{[1
]}

Yu, Myunghwan ^{[1
]}

Nawarathne, Shan Randima ^{[1
]}

Chaturanga, Nuwan Chamara ^{[1
]}

Maniraguha, Venuste ^{[1
]}

Cruz, Bernadette Gerpacio Sta. ^{[1
]}

Seo, Eunsoo ^{[1
]}

Lee, Jeseok ^{[1
]}

Park, Haeeun ^{[1
]}

Lee, Hans ^{[2
]}

Heo, Jung Min ^{[1
]}

机构：

[1] Chungnam Natl Univ, Dept Anim Sci & Biotechnol, Daejeon 34134, South Korea

[2] Kemin Anim Nutr & Hlth, Asia Pacific, Seongnam Si, Gyeonggi Do, South Korea

来源：

POULTRY SCIENCE | 2025年 / 104卷 / 04期

关键词：

Egg quality; Digestibility; Laying hen; Performance; Protease; APPARENT ILEAL DIGESTIBILITY; BROILER-CHICKENS; NUTRIENT DIGESTIBILITY; GROWTH-PERFORMANCE; AMINO-ACIDS; INTESTINAL MORPHOLOGY; EXOGENOUS PROTEASE; POULTRY; EXPRESSION; RESPONSES;

D O I：

10.1016/j.psj.2025.104977

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

Laying hen responses to supplemental multiprotease on performance, egg quality, digestibility, gut histomorphology, nitrogen excretion, and economic performance of laying hens until 37 weeks of age were investigated. A total of 189 25-week-old Hy-Line Brown hens were housed in enriched cages (7 birds/cage) and randomly allocated to 1 of 3 diets with 9 replicates per treatment. Dietary treatments included: an adequate positive control- PC [met the breed and age standards for crude protein (CP) and amino acids (AA)]; negative control- NC (90 % CP and AA requirement); and NC supplemented with multiprotease - NCMP. Multiprotease was supplemented at 300 g/t of feed equating to 2400 U/kg. Egg production rate and feed intake were not altered (P > 0.10) by the dietary treatments. Between 25 and 37 weeks of age (woa), the NCMP diet reduced the feed conversion ratios by 3 % (1.91 vs 1.97; P < 0.05) in comparison to the NC diet while improving (P < 0.05) the egg weights by 3 % (58.56 vs 56.68); Haugh units by 2 % (91.78 vs 90.20); and breaking strength by 1 % (4.65 vs 4.61). Marginally intensified yolk color and albumen height (P < 0.10) were also observed with the NCMP diet. Furthermore, the NCMP diet marginally improved the villus height, width, and absorptive surface area (P < 0.10) relative to NC. Multiprotease-supplemented NCMP diet improved (P < 0.05) the digestibility of crude protein; and amino acids including lysine, methionine, phenylalanine, isoleucine, leucine, glutamine, tyrosine, relative to the NC diet. Lowered AA/CP diets (NC and NCMP) reduced the N excreted and feed costs (P < 0.05) relative to the PC diet. Multiprotease increased the returns on investment (P < 0.10), and nitrogen retained in egg (P < 0.05) from 25- 37woa. Conclusively, feeding reduced CP/AA diets maintained the egg production rate while reducing the N excreted and feed costs. Multiprotease modulation of ileal absorptive capacity and nutrient digestibility is linked to improved feed efficiency, egg quality, and revenue estimates of supplemented hens.

引用

页数：10

共 72 条

[1] Effects of reduced crude protein diets while maintaining essential amino acid concentrations on growth performance, nitrogen output, ammonia production, and meat yield [J].