1
|
Plouhinec L, Neugnot V, Lafond M, Berrin JG. Carbohydrate-active enzymes in animal feed. Biotechnol Adv 2023; 65:108145. [PMID: 37030553 DOI: 10.1016/j.biotechadv.2023.108145] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 03/31/2023] [Accepted: 04/01/2023] [Indexed: 04/10/2023]
Abstract
Considering an ever-growing global population, which hit 8 billion people in the fall of 2022, it is essential to find solutions to avoid the competition between human food and animal feed for croplands. Agricultural co-products have become important components of the circular economy with their use in animal feed. Their implementation was made possible by the addition of exogenous enzymes in the diet, especially carbohydrate-active enzymes (CAZymes). In this review, we describe the diversity and versatility of microbial CAZymes targeting non-starch polysaccharides to improve the nutritional potential of diets containing cereals and protein meals. We focused our attention on cellulases, hemicellulases, pectinases which were often found to be crucial in vivo. We also highlight the performance and health benefits brought by the exogenous addition of enzymatic cocktails containing CAZymes in the diets of monogastric animals. Taking the example of the well-studied commercial cocktail Rovabio™, we discuss the evolution, constraints and future challenges faced by feed enzymes suppliers. We hope that this review will promote the use and development of enzyme solutions for industries to sustainably feed humans in the future.
Collapse
Affiliation(s)
- Lauriane Plouhinec
- INRAE, Aix-Marseille Univ., UMR1163 Biodiversité et Biotechnologie Fongiques, 13009 Marseille, France; ADISSEO, 135 Avenue de Rangueil, INSA Toulouse, Hall Gilbert Durand, 31400 Toulouse, France.
| | - Virginie Neugnot
- ADISSEO, 135 Avenue de Rangueil, INSA Toulouse, Hall Gilbert Durand, 31400 Toulouse, France
| | - Mickael Lafond
- INRAE, Aix-Marseille Univ., UMR1163 Biodiversité et Biotechnologie Fongiques, 13009 Marseille, France
| | - Jean-Guy Berrin
- INRAE, Aix-Marseille Univ., UMR1163 Biodiversité et Biotechnologie Fongiques, 13009 Marseille, France.
| |
Collapse
|
2
|
Li H, Zhang P, Li D, Chen B, Li J, Wang T. The Expression Patterns of Exogenous Plant miRNAs in Chickens. Genes (Basel) 2023; 14:genes14030760. [PMID: 36981030 PMCID: PMC10048663 DOI: 10.3390/genes14030760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/17/2023] [Accepted: 03/18/2023] [Indexed: 03/30/2023] Open
Abstract
(1) Background: MicroRNAs (miRNAs) are involved in a variety of biological processes, such as cell proliferation, cell differentiation, and organ development. Recent studies have shown that plant miRNAs may enter the diet and play physiological and/or pathophysiological roles in human health and disease; however, little is known about plant miRNAs in chickens. (2) Methods: Here, we analyzed miRNA sequencing data, with the use of five Chinese native chicken breeds and six different tissues (heart, liver, spleen, lung, kidney, and leg muscle), and used Illumina sequencing to detect the expression of plant miRNAs in the pectoralis muscles at fourteen developmental stages of Tibetan chickens. (3) Results: The results showed that plant miRNAs are detectable in multiple tissues and organs in different chicken breeds. Surprisingly, we found that plant miRNAs, such as tae-miR2018, were detectable in free-range Tibetan chicken embryos at different stages. The results of gavage feeding experiments also showed that synthetic tae-miR2018 was detectable in caged Tibetan chickens after ingestion. The analysis of tae-miR2018 showed that its target genes were related to skeletal muscle organ development, regulation of mesodermal cell fate specification, growth factor activity, negative regulation of the cell cycle, and regulation of growth, indicating that exogenous miRNA may regulate the development of chicken embryos. Further cell cultures and exogenous miRNA uptake assay experiments showed that synthetic wheat miR2018 can be absorbed by chicken myoblasts. (4) Conclusions: Our study found that chickens can absorb and deposit plant miRNAs in various tissues and organs. The plant miRNAs detected in embryos may be involved in the development of chicken embryos.
Collapse
Affiliation(s)
- Hao Li
- College of Animal Science, Xichang University, Xichang 615013, China
| | - Pu Zhang
- College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
| | - Diyan Li
- School of Pharmacy, Chengdu University, Chengdu 610106, China
| | - Binlong Chen
- College of Animal Science, Xichang University, Xichang 615013, China
| | - Jing Li
- College of Agricultural and Life Sciences, Kunming University, Kunming 650214, China
| | - Tao Wang
- School of Pharmacy, Chengdu University, Chengdu 610106, China
| |
Collapse
|
3
|
Ribeiro T, Cardoso V, Ferreira LMA, Lordelo MMS, Coelho E, Moreira ASP, Domingues MRM, Coimbra MA, Bedford MR, Fontes CMGA. Xylo-oligosaccharides display a prebiotic activity when used to supplement wheat or corn-based diets for broilers. Poult Sci 2019; 97:4330-4341. [PMID: 30101299 DOI: 10.3382/ps/pey336] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 07/27/2018] [Indexed: 01/11/2023] Open
Abstract
It is now well established that exogenous β-1,4-xylanases improve the nutritive value of wheat-based diets for poultry. Among other factors, the mechanism of action of exogenous enzymes may involve a microbial route resulting from the generation of prebiotic xylo-oligosaccharides (XOS) in the birds' gastro-intestinal (GI) tract. In a series of three experiments, the effect of XOS on the performance of broilers fed wheat or corn-based diets was investigated. In experiment 1, birds receiving diets supplemented with XOS displayed an increased weight gain (P = 0.08). The capacity of XOS to improve the performance of animals during a longer trial (42 d) was investigated (Experiment 2). The data revealed that diet supplementation with XOS, tested at two incorporation rates (0.1 and 1 g/kg), or with an exogenous β-1,4-xylanase resulted in an increased nutritive value of the wheat-based diet. An improvement in animal performance was accompanied by a shift in the microbial populations colonizing the upper portions of the GI tract. XOS were also able to improve the performance of broilers fed a corn-based diet, although the effects were not apparent at incorporation rates of 10 g/kg. Together these studies suggest that in some cases the capacity of β-1,4-xylanases to improve the nutritive value of wheat-based diets is more related to their ability to produce prebiotic XOS than to their ability to degrade arabinoxylans. The extremely low quantities of XOS used in this study also challenge the depiction of a prebiotic being a quantitatively fermented substrate. These data also bring into question the validity of the "cell wall" mechanism, as XOS elicited an effect with clearly no action on endosperm cell wall integrity and yet the performance effects noted were equivalent or superior to the added enzymes.
Collapse
Affiliation(s)
- T Ribeiro
- CIISA-Faculdade de Medicina Veterinária, Universidade de Lisboa, Pólo Universitário do Alto da Ajuda, Avenida da Universidade Técnica, 1300-477 Lisboa, Portugal
| | - V Cardoso
- CIISA-Faculdade de Medicina Veterinária, Universidade de Lisboa, Pólo Universitário do Alto da Ajuda, Avenida da Universidade Técnica, 1300-477 Lisboa, Portugal.,NZYTech - genes & enzymes - Estrada do Paço do Lumiar, Campus do Lumiar, Edif. E, R/C, 1649-038 Lisboa, Portugal
| | - L M A Ferreira
- CIISA-Faculdade de Medicina Veterinária, Universidade de Lisboa, Pólo Universitário do Alto da Ajuda, Avenida da Universidade Técnica, 1300-477 Lisboa, Portugal
| | - M M S Lordelo
- Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal
| | - E Coelho
- QOPNA, Departamento de Química, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - A S P Moreira
- QOPNA, Departamento de Química, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - M R M Domingues
- QOPNA, Departamento de Química, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - M A Coimbra
- QOPNA, Departamento de Química, Universidade de Aveiro, 3810-193 Aveiro, Portugal
| | - M R Bedford
- AB Vista, Woodstock Court, Blenheim Rd. Marlborough, UK
| | - C M G A Fontes
- CIISA-Faculdade de Medicina Veterinária, Universidade de Lisboa, Pólo Universitário do Alto da Ajuda, Avenida da Universidade Técnica, 1300-477 Lisboa, Portugal.,NZYTech - genes & enzymes - Estrada do Paço do Lumiar, Campus do Lumiar, Edif. E, R/C, 1649-038 Lisboa, Portugal
| |
Collapse
|
4
|
Fernandes V, Costa M, Ribeiro T, Serrano L, Cardoso V, Santos H, Lordelo M, Ferreira L, Fontes C. 1,3-1,4-β-Glucanases and not 1,4-β-glucanases improve the nutritive value of barley-based diets for broilers. Anim Feed Sci Technol 2016. [DOI: 10.1016/j.anifeedsci.2015.11.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
5
|
Recombinant CBM-fusion technology - Applications overview. Biotechnol Adv 2015; 33:358-69. [PMID: 25689072 DOI: 10.1016/j.biotechadv.2015.02.006] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Revised: 02/06/2015] [Accepted: 02/09/2015] [Indexed: 02/04/2023]
Abstract
Carbohydrate-binding modules (CBMs) are small components of several enzymes, which present an independent fold and function, and specific carbohydrate-binding activity. Their major function is to bind the enzyme to the substrate enhancing its catalytic activity, especially in the case of insoluble substrates. The immense diversity of CBMs, together with their unique properties, has long raised their attention for many biotechnological applications. Recombinant DNA technology has been used for cloning and characterizing new CBMs. In addition, it has been employed to improve the purity and availability of many CBMs, but mainly, to construct bi-functional CBM-fused proteins for specific applications. This review presents a comprehensive summary of the uses of CBMs recombinantly produced from heterologous organisms, or by the original host, along with the latest advances. Emphasis is given particularly to the applications of recombinant CBM-fusions in: (a) modification of fibers, (b) production, purification and immobilization of recombinant proteins, (c) functionalization of biomaterials and (d) development of microarrays and probes.
Collapse
|
6
|
Temporal restriction of enzyme supplementation in barley-based diets has no effect in broiler performance. Anim Feed Sci Technol 2014. [DOI: 10.1016/j.anifeedsci.2014.09.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
7
|
Costa M, Fernandes VO, Ribeiro T, Serrano L, Cardoso V, Santos H, Lordelo M, Ferreira LMA, Fontes CMGA. Construction of GH16 β-glucanase mini-cellulosomes to improve the nutritive value of barley-based diets for broilers. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:7496-7506. [PMID: 25010714 DOI: 10.1021/jf502157y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Anaerobic cellulolytic bacteria organize a comprehensive range of cellulases and hemicellulases in high molecular weight multienzyme complexes termed cellulosomes. Integration of cellulosomal components occurs via highly ordered protein-protein interactions between cohesins and dockerins. This paper reports the production of mini-cellulosomes containing one (GH16-1C) or three (GH16-3C) copies of Clostridium thermocellum glucanase 16A (CtGlc16A). Barley β-1,3-1,4-glucans are known to be antinutritive for monogastric animals, particularly for poultry. GH16-1C and GH16-3C were used to supplement barley-based diets for broilers. The data revealed that the two mini-cellulosomes effectively improved the nutritive value of barley-based diets for broilers. Analysis of mini-cellulosome molecular integrity revealed that linker sequences separating protein domains in scaffoldins and cellulosomal catalytic units are highly susceptible to proteolytic attack in vivo. The data suggest that linker protection could result in further improvements in enzyme efficacy to improve the nutritive value of barley-based diets for monogastric animals.
Collapse
Affiliation(s)
- Mónica Costa
- CIISA-Faculdade de Medicina Veterinária, Universidade de Lisboa , Avenida da Universidade Técnica, 1300-477 Lisboa, Portugal
| | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Mendes A, Ribeiro T, Correia B, Bule P, Maçãs B, Falcão L, Freire J, Ferreira L, Fontes C, Lordelo M. Low doses of exogenous xylanase improve the nutritive value of triticale-based diets for broilers. J APPL POULTRY RES 2013. [DOI: 10.3382/japr.2012-00610] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
9
|
Ribeiro T, Lordelo M, Prates J, Falcão L, Freire J, Ferreira L, Fontes C. The thermostable β-1,3-1,4-glucanase fromClostridium thermocellumimproves the nutritive value of highly viscous barley-based diets for broilers. Br Poult Sci 2012; 53:224-34. [DOI: 10.1080/00071668.2012.674632] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
10
|
|
11
|
Ribeiro T, Lordelo MMS, Ponte PIP, Maçãs B, Prates JAM, Aguiar Fontes M, Falcão L, Freire JPB, Ferreira LMA, Fontes CMGA. Levels of endogenous β-glucanase activity in barley affect the efficacy of exogenous enzymes used to supplement barley-based diets for poultry. Poult Sci 2011; 90:1245-56. [PMID: 21597066 DOI: 10.3382/ps.2010-01218] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
To improve the nutritive value of barley-based diet for broilers, 2 experiments using 2 different barley lots were performed to evaluate the capacity of a mesophilic cellulase when fused to a β-glucan specific family 11 carbohydrate-binding module. The data revealed that the recombinant β-glucanase derivatives were not appropriate for feed supplementation because of a lack of stability at acidic pH levels. However, under the same experimental conditions, a commercial enzyme mixture improved the nutritive value of 1 of the cereal lots used. Analysis of the nutritive value of the 2 barleys revealed intrinsic differences in the levels of endogenous β-glucanase activity. These differences were extensively evident when the studies were expanded to a range of 64 barley lots. Thus, to clarify the effect of endogenous cellulases on the efficacy of exogenous β-glucanases used to supplement barley-based diets for poultry, 2 barley lots presenting low and high levels of endogenous plant cell wall-degrading enzymes were selected. These lots were used to prepare 2 barley-based diets, which were supplemented with or without a commercial enzyme product and fed to broiler chicks. The data revealed that the exogenous enzymes were effective when the basal diet presented low levels of endogenous β-glucanases but were unable to improve the nutritive value of the barley lot displaying higher β-glucanase activity. Thus, these studies suggest that levels of endogenous β-glucanases may affect the efficacy of exogenous enzymes used to improve the nutritive value of barley-based diets for broilers. The development of a quick β-glucanase assay that could be applied for cereal-based feeds may help identify those barley-based diets that are more responsive to the action of feed enzymes.
Collapse
Affiliation(s)
- T Ribeiro
- Faculdade de Medicina Veterinária, Pólo Universitário do Alto da Ajuda, Avenida da Universidade Técnica, Lisboa, Portugal
| | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Ribeiro T, Ponte PIP, Guerreiro CIPD, Santos HM, Falcão L, Freire JPB, Ferreira LMA, Prates JAM, Fontes CMGA, Lordelo MM. A family 11 carbohydrate-binding module (CBM) improves the efficacy of a recombinant cellulase used to supplement barley-based diets for broilers at lower dosage rates. Br Poult Sci 2009; 49:600-8. [PMID: 18836907 DOI: 10.1080/00071660802345749] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
1. Exogenous microbial beta-1,3-1,4-glucanases and hemicellulases contribute to improving the nutritive value of cereals rich in soluble non-starch polysaccharides for poultry. 2. In general, plant cell wall hydrolases display a modular structure comprising a catalytic module linked to one or more non-catalytic carbohydrate-binding modules (CBMs). Based on primary structure similarity, CBMs have been classified in 50 different families. CBMs anchor cellulases and hemicellulases into their target substrates, therefore eliciting efficient hydrolysis of recalcitrant polysaccharides. 3. A study was undertaken to investigate the effects of a family 11 beta-glucan-binding domain in the function of recombinant derivatives of cellulase CtLic26A-Cel5E of Clostridium thermocellum that were used to supplement a barley-based diet at lower dosage rates. 4. The results showed that birds fed on diets supplemented with the recombinant CtLic26A-Cel5E modular derivative containing the family 11 CBM or the commercial enzyme mixture Rovabio Excel AP tended to display improved performance when compared to birds fed diets not supplemented with exogenous enzymes. 5. It is suggested that at lower than previously reported enzyme dosage (10 U/kg vs 30 U/kg of basal diet), the beta-glucan-binding domain also elicits the function of the recombinant CtLic26A-Cel5E derivatives. 6. Finally, the data suggest that exogenous enzymes added to barley-based diets act primarily in the proximal section of the gastrointestinal tract.
Collapse
Affiliation(s)
- T Ribeiro
- CIISA-Faculdade de Medicina Veterinária, Pólo Universitário do Alto da Ajuda, Avenida da Universidade Técnica, Lisboa, Portugal
| | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Guerreiro C, Ribeiro T, Ponte P, Lordelo M, Falcão L, Freire J, Ferreira L, Prates J, Fontes C. Role of a family 11 carbohydrate-binding module in the function of a recombinant cellulase used to supplement a barley-based diet for broiler chickens. Br Poult Sci 2008; 49:446-54. [DOI: 10.1080/00071660802216676] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
14
|
Ponte PIP, Lordelo MMS, Guerreiro CIPD, Soares MC, Mourao JL, Crespo JP, Crespo DG, Prates JAM, Ferreira LMA, Fontes CMGA. Crop beta-glucanase activity limits the effectiveness of a recombinant cellulase used to supplement a barley-based feed for free-range broilers. Br Poult Sci 2008; 49:347-59. [PMID: 18568760 DOI: 10.1080/00071660802158340] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
1. The supplementation of diets rich in soluble polysaccharides with microbial cellulases and hemicellulases decreases digesta viscosity and promotes broiler performance. 2. In contrast, recent experiments suggest that polysaccharidases are ineffective for improving the nutritive value of pasture biomass used by free-range broilers. However, the feasibility of using cellulases and hemicellulases to improve the utilisation of cereal-based feeds by pastured poultry remains to be established. 3. A study was undertaken to investigate the capacity of a recombinant cellulase from Clostridium thermocellum to improve the nutritive value of a barley-based feed for free-range pastured broilers of the RedBro Cou Nu x RedBro M genotype. 4. The results show that supplementation of a barley-based diet with a recombinant beta-glucanase had no effect on the performance of free-range broilers, foraging in legume-based diets from d 28 to 56. In addition, the results confirm that the lack of effect of the recombinant enzyme in improving the nutritive value of the barley-based feed does not result from enzyme proteolysis or inhibition in the gastrointestinal tract. 5. Significantly, beta-glucanase activity was identified in the crop of non-supplemented animals. The data suggest that endogenous cellulases originated both from the barley-based feed and from the crop microflora. 6. The results presented here suggest that in older birds of slow-growing genotypes associated with free-range production systems, previously unknown sources of beta-glucanases, such as the feed and microbial symbiotic microflora, can affect the effectiveness of exogenous enzymes added to the feed.
Collapse
Affiliation(s)
- P I P Ponte
- CIISA-Faculdade de Medicina Veterinaria, Pólo Universitário do Alto da Ajuda, Avenida da Universidade Técnica, Lisboa, Portugal
| | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Ponte PIP, Rosado CMC, Crespo JP, Crespo DG, Mourão JL, Chaveiro-Soares MA, Brás JLA, Mendes I, Gama LT, Prates JAM, Ferreira LMA, Fontes CMGA. Pasture intake improves the performance and meat sensory attributes of free-range broilers. Poult Sci 2008; 87:71-9. [PMID: 18079453 DOI: 10.3382/ps.2007-00147] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Free-range chickens are assumed to consume low to moderate levels of pasture, although the effects of forage intake in broiler performance and poultry meat quality remain to be established. In addition, despite cellulases and hemicellulases being widely used as feed supplements to improve the nutritive value of cereal-based diets for fast-growing broilers, the potential interest of these biocatalysts in the production of free-range chicken is yet to be established. In this study, broilers of the RedBro Cou Nu x RedBro M genotype were fed a cereal-based diet in portable floorless pens located either on a rainfed subterranean clover (Trifolium subterraneum) pasture or on an irrigated white clover (Trifolium repens) pasture. Control birds were maintained at the same site in identical pens but with no access to pastures. The importance of pasture intake and enzyme supplementation in the performance and meat sensory properties of the free-range chicken from d 28 to 56 was investigated. The results revealed that although cellulase and hemicellulase supplementation had no impact on broiler performance (P > 0.05), birds foraging on legume-based pastures reached significantly greater final BW. The data suggest that the improvement in broiler performance results from increased intake of the cereal-based feed rather than from an improvement in the efficiency of nutrient utilization per se. Interestingly, although the intake of the subterranean clover pasture had no impact on the tenderness, juiciness, and flavor of broiler meat, members of a 30-person consumer panel classified the meat from grazing broilers with greater scores for overall appreciation. Together, the results suggest that pasture intake promotes bird performance while contributing to the production of broiler meat with preferred sensory attributes.
Collapse
Affiliation(s)
- P I P Ponte
- CIISA - Faculdade de Medicina Veterinária, Pólo Universitário do Alto da Ajuda, Avenida da Universidade Técnica, 1300-477, Lisbon, Portugal
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Cowieson AJ, Hruby M, Pierson EEM. Evolving enzyme technology: impact on commercial poultry nutrition. Nutr Res Rev 2007; 19:90-103. [DOI: 10.1079/nrr2006121] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
AbstractThe use of exogenous enzymes to improve the nutritional value of poultry diets is a relatively new concept. The technology is rapidly evolving, with new enzymes, enzyme combinations, and novel applications being developed as rapidly as regulatory restrictions will allow. Most researchers in the field of poultry nutrition would consider phytase to be the last significant leap forward in terms of enzyme use in the animal feed industry. However, there is a great deal of ongoing research into the next generation of enzymes with a focus on ingredient quality, predictability of response via least-square models, improvements in food safety, effect of bird age, effect of various side activities and enzyme dose, maximisation of net income and reduction in environmental pollution. It is the purpose of the present review article to summarise the current research in the area of feed enzymes for poultry and to speculate on future applications of enzymes and new enzyme technologies that may be of value to the industry in the coming years.
Collapse
|
17
|
Galactanases and Mannanases Improve the Nutritive Value of Maize and Soybean Meal Based Diets for Broiler Chicks. J Poult Sci 2006. [DOI: 10.2141/jpsa.43.344] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|