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Diurnal vertical and seasonal changes in non-structural carbohydrates in Marandu palisade grass

Published online by Cambridge University Press:  31 May 2018

F. C. Leite De Oliveira ,
J. M. D. Sanchez ,
J. M. B. Vendramini ,
C. G. Lima ,
P. H. C. Luz ,
C. O. Rocha ,
L. E. T. Pereira Open the ORCID record for L. E. T. Pereira [Opens in a new window]  and
V. R. Herling
F. C. Leite De Oliveira
Affiliation:
Department of Animal Science, University of São Paulo, College of Animal Science and Food Engineering (FZEA/USP), Pirassununga, 13635-900 SP, Brazil
J. M. D. Sanchez
Affiliation:
Range Cattle Research and Education Center, University of Florida, Ona, 33865 FL, USA
J. M. B. Vendramini
Affiliation:
Range Cattle Research and Education Center, University of Florida, Ona, 33865 FL, USA
C. G. Lima
Affiliation:
Department of Basic Sciences, FZEA/USP, Pirassununga, 13635-900 SP, Brazil
P. H. C. Luz
Affiliation:
Department of Animal Science, University of São Paulo, College of Animal Science and Food Engineering (FZEA/USP), Pirassununga, 13635-900 SP, Brazil
C. O. Rocha
Affiliation:
Department of Animal Science, University of São Paulo, College of Animal Science and Food Engineering (FZEA/USP), Pirassununga, 13635-900 SP, Brazil
L. E. T. Pereira
Affiliation:
Department of Animal Science, University of São Paulo, College of Animal Science and Food Engineering (FZEA/USP), Pirassununga, 13635-900 SP, Brazil
V. R. Herling*
Affiliation:
Department of Animal Science, University of São Paulo, College of Animal Science and Food Engineering (FZEA/USP), Pirassununga, 13635-900 SP, Brazil
*
Author for correspondence: V.R. Herling, E-mail: vrherlin@usp.br
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Abstract

Forage is the primary feed source for livestock in tropical regions and energy is one of the most important nutrients for ruminant nutrition. The effects of harvest management of Marandu palisade grass (Brachiaria brizantha cv. Marandu Syn. Urochloa brizantha cv. Marandu) on non-structural carbohydrate (NSC) concentrations were evaluated. A plot (Experiment 1) and a greenhouse study (Experiment 2) were conducted in 2013–14. In Experiment 1, treatments were the factorial arrangement of two harvest times and two vertical canopy layers (upper and intermediate), distributed in a completely randomized design with five replicates. In Experiment 2, treatments were the factorial arrangement of six harvest times and two morphological fractions (leaf blade and pseudostem). In both experiments, NSC concentration increased during the day. Upper and intermediate canopy layers had greater NSC concentration at 15.00 than 06.00 h during spring and summer. In addition, the magnitude of NSC increase was greater in the upper than intermediate canopy layer and in spring than summer. Marandu palisade grass shows greater digestibility in the afternoon than morning, representing an opportunity to optimize energy concentration through harvest management.

Keywords

In vitro digestible dry matterneutral detergent fibrenitrogenstarch
Type
Animal Research Paper
Information
The Journal of Agricultural Science , Volume 156 , Issue 3 , April 2018 , pp. 457 - 464
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Copyright
Copyright © Cambridge University Press 2018 

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