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Effects of xylanase on the fermentation profile and chemical composition of sugarcane silage

Published online by Cambridge University Press:  09 January 2019

T. A. Del Valle*
Affiliation:
Department of Biotechnology Vegetal and Animal Production, Center of Agricultural Sciences, Federal University of São Carlos, Araras, Brazil Department of Animal Nutrition and Production, University of São Paulo, Pirassununga, Brazil
G. Antonio
Affiliation:
Department of Biotechnology Vegetal and Animal Production, Center of Agricultural Sciences, Federal University of São Carlos, Araras, Brazil
T. F. Zenatti
Affiliation:
Department of Biotechnology Vegetal and Animal Production, Center of Agricultural Sciences, Federal University of São Carlos, Araras, Brazil
M. Campana
Affiliation:
Department of Biotechnology Vegetal and Animal Production, Center of Agricultural Sciences, Federal University of São Carlos, Araras, Brazil
E. M. C. Zilio
Affiliation:
Department of Animal Nutrition and Production, University of São Paulo, Pirassununga, Brazil
L. G. Ghizzi
Affiliation:
Department of Animal Nutrition and Production, University of São Paulo, Pirassununga, Brazil
J. R. Gandra
Affiliation:
Department of Animal Science, Federal University of Grande Dourados, Dourados, Brazil
J. A. C. Osório
Affiliation:
Department of Animal Science, Maringá State University, Maringá, Brazil
J. P. G. de Morais
Affiliation:
Department of Biotechnology Vegetal and Animal Production, Center of Agricultural Sciences, Federal University of São Carlos, Araras, Brazil
*
Author for correspondence: T. A. Del Valle, E-mail: [email protected]

Abstract

The current study aims to evaluate the effects of increasing levels of xylanase enzyme (XYL) on sugarcane silage fermentation, fermentative losses, chemical composition, dry matter (DM), neutral detergent fibre (NDF) degradation and aerobic stability. A completely randomized design trial was performed with five treatments and 50 experimental silos. Treatments were: 0, 100, 200, 300 and 400 mg of XYL per kg of DM. XYL contained 10 000 U/g. There was a quadratic effect of XYL on silage pH and acetic acid concentration: lower pH and higher acetic acid concentrations were found at intermediary levels of the enzyme. XYL decreased lactic acid concentration linearly. Furthermore, the enzyme had a quadratic effect on effluent and total losses, with higher losses at intermediary XYL levels. There was a quadratic effect of XYL on organic matter (OM), non-fibre carbohydrates (NFC) and crude protein (CP) content. In addition, a quadratic effect of XYL was observed on NDF content and degradation. Intermediary levels of XYL showed higher concentration of OM and NFC. The addition of XYL had no effect on silage temperature and pH after aerobic exposure. Thus, intermediate levels of XYL increased acetic acid and decreased silage pH. Besides positive effects on silage composition, intermediary XYL levels decreased NDF degradation.

Type
Animal Research Paper
Copyright
Copyright © Cambridge University Press 2019 

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