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Productive and nutritive traits of Piatã palisadegrass after thinning the forest component of a silvopastoral system in southeastern Brazil

Published online by Cambridge University Press:  25 August 2022

H. B. Brunetti Open the ORCID record for H. B. Brunetti [Opens in a new window] ,
J. R. M. Pezzopane ,
W. L. Bonani ,
C. Bosi ,
R. Pasquini Neto ,
A. C. de C. Bernardi  and
P. P. A. de Oliveira
H. B. Brunetti*
Affiliation:
Embrapa Pecuária Sudeste, km 234 Washington Luiz Highway, ‘Fazenda Canchim’, PO Box 339, São Carlos, São Paulo 13560-970, Brazil
J. R. M. Pezzopane
Affiliation:
Embrapa Pecuária Sudeste, km 234 Washington Luiz Highway, ‘Fazenda Canchim’, PO Box 339, São Carlos, São Paulo 13560-970, Brazil
W. L. Bonani
Affiliation:
Embrapa Pecuária Sudeste, km 234 Washington Luiz Highway, ‘Fazenda Canchim’, PO Box 339, São Carlos, São Paulo 13560-970, Brazil
C. Bosi
Affiliation:
Embrapa Pecuária Sudeste, km 234 Washington Luiz Highway, ‘Fazenda Canchim’, PO Box 339, São Carlos, São Paulo 13560-970, Brazil
R. Pasquini Neto
Affiliation:
Embrapa Pecuária Sudeste, km 234 Washington Luiz Highway, ‘Fazenda Canchim’, PO Box 339, São Carlos, São Paulo 13560-970, Brazil
A. C. de C. Bernardi
Affiliation:
Embrapa Pecuária Sudeste, km 234 Washington Luiz Highway, ‘Fazenda Canchim’, PO Box 339, São Carlos, São Paulo 13560-970, Brazil
P. P. A. de Oliveira
Affiliation:
Embrapa Pecuária Sudeste, km 234 Washington Luiz Highway, ‘Fazenda Canchim’, PO Box 339, São Carlos, São Paulo 13560-970, Brazil
*
Author for correspondence: H. B. Brunetti, E-mail: henrique.brunetti@alumni.usp.br
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Abstract

Silvopastoral systems (SPSs) are sustainable alternatives for pasture intensification. Management practices such as thinning are options to diminish competition for resources between pasture and trees, ensuring appropriate forage production. The objective of this study was to evaluate the productive and nutritive traits of Piatã palisadegrass (Urochloa brizantha cv. BRS Piatã) after thinning the forest component of a SPS. Forage production and nutritive value, along with microclimate variables were assessed in a SPS and in an intensive system (INT) in São Carlos-SP, Brazil, from 2016 to 2018. The INT was a full sun pasture of Piatã palisadegrass, while the SPS was established with Piatã palisadegrass shaded by eucalyptus (Eucalyptus urograndis clone GG100) spaced 15 × 2 m but thinned to 15 × 4 m before the onset of the experiment. In the SPS, measurements were made under the tree row (SPS_1), 3.75-m (SPS_2), 7.5-m (SPS_3) and 11.25-m (SPS_4) distant from the North row. Forage accumulation in the two systems were similar, whereas the pre-grazing forage mass in most of the SPS positions were smaller than that of the INT during the autumn of 2017 and summer of 2018. Crude protein (CP) content was greater in the SPS than in the INT in most positions and seasons. Forage production was favoured by the thinning of the trees mainly in the seasons close to the event, while forage CP was consistently greater in the understory pasture. Thinning of trees in SPSs can be adopted to provide forage production similar to intensive pastures with higher protein content.

Keywords

(Eucalyptus urograndis) clone GG100forage accumulationintegrated systemsphotosynthetically active radiationUrochloa (syn. Brachiaria) brizantha (Hochst ex A. Rich.) Stapf cv. BRS Piatã
Type
Crops and Soils Research Paper
Information
The Journal of Agricultural Science , Volume 160 , Issue 5 , October 2022 , pp. 338 - 348
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Copyright
Copyright © The Author(s), 2022. Published by Cambridge University Press

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