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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidad Nacional Autónoma de México
2006
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| Acceso en línea: | https://www.redalyc.org/articulo.oa?id=42337101 |
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- Producción de enzimas hemicelulolíticas por fermentación sólida y su aplicación en alimento balanceado para pollo de engorda Ignacio Lagunas Bernabé Blanca E. García Almendárez Eduardo Castaño Tostado Carlos Regalado González Ernesto Ávila González Multidisciplinaria (Ciencias Naturales y Exactas) BROILERS HEMICELLULOLYTIC ENZYMES SOLID SUBSTRATE FERMENTATION Agroindustrial by-products may be recycled to reduce environmental pollution, by incorporating them into solid substrate fermentation(SSF) processes, where higher value-added products can be obtained. SSF can be carried out using coffee wastesfrom the soluble coffee industry and corn cobs as substrates, and the fi lamentous fungi Aspergillus niger GS1, in order to produceenzymatic complexes with hemicellulolytic activity. Two enzymatic extracts were obtained, one showing high mannanase (M)activity while the other showed high xylanase (X) activity. These extracts were concentrated and mixed in a 1:1 (v/v) ratio (MX).MX contained 143.6 U/mL of mannanase, and 268.7 U/mL of xylanase (1 U = µg of mannose and xylose released per min at 50°C,from locust bean gum and oat spelt xylan as substrates, respectively). MX was added to soybean-sorghum-based diets containinga metabolizable energy (ME) and crude protein 3% lower than the one employed for broiler chicks kept in metabolic chambers,over a period of 21 days. MX induced a signifi cant increase (P < 0.05) in ME (2%) that was attributed to partial hydrolysis ofthe hemicellulose available in the feed. Under commercial production conditions of broiler chicks (52 days), the addition of theenzymatic extracts M and MX to the feed signifi cantly improved (p < 0.05) body weight gain (BWG) and feed conversion index(FCI), when compared to the use of a commercial enzymatic additive. The M extract gave the best results, with 3132 g of averageBWG and a FCI of 1.55, while the control feed produced 2931 g of BWG and a FCI of 1.70. 2006 artículo científico 0301-5092 https://www.redalyc.org/articulo.oa?id=42337101 en http://www.redalyc.org/revista.oa?id=423 Veterinaria México application/pdf Universidad Nacional Autónoma de México Veterinaria México (México) Num.1 Vol.37