Grazing management strategies for Urochloa decumbens (Stapf) R. Webster in a silvopastoral system under rotational stocking.
Our objective was to compare herbage accumulation and nutritive value of Urochloa decumbens (Stapf) R. Webster managed under pre-grazing canopy light interception (LI) targets of 90%, 95% and 100% in silvopastoral system (SPS) and 95% in open pasture (OP; U. decumbens under full sunlight) to establish a pre-grazing target for SPS of ~43% shade. The evaluations were made during two rainy seasons and one dry season. The total herbage accumulation in SPS was lower than in OP at all LI targets and seasons. However, the difference in total herbage accumulation between SPS and OP was reduced when SPS was harvested at 95% LI, with reductions of 20% and 28% in both rainy seasons (12,191 × 15,324 kg DM/ha and 11,158 × 15,424 kg DM/ha respectively). Moreover, under 95% LI in SPS, crude protein concentration was 18% and 19% greater than that in OP in both rainy seasons (155 × 131 g/kg DM and 144 × 121 g/kg DM respectively), thus representing the optimal pre-grazing LI target for U. decumbens in SPS. In addition, a canopy height of 20 cm was necessary for 95% LI in OP and a height of 40 cm in SPS. Therefore, U. decumbens should be grazed at 40 cm canopy height, in SPS with ~43% shade to keep 95% LI as the target. However, this target will only be effective if the shade level is maintained, which will reduce height variation over time.
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Format: | Artigo de periódico biblioteca |
Language: | Ingles English |
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2021-08-13
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Subjects: | Pastoreio, Sistema silvipastoril, Altura do dossel, Herbage accumulation, Light interception, Shading, Gramínea Forrageira, Sombreamento, Valor Nutritivo, Nutritive value, |
Online Access: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1133540 https://doi.org/10.1111/gfs.12491 |
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dig-alice-doc-11335402021-09-26T02:02:57Z Grazing management strategies for Urochloa decumbens (Stapf) R. Webster in a silvopastoral system under rotational stocking. MACHADO, V. D. FONSECA, D. M. da LIMA, M. A. MARTUSCELLO, J. A. PACIULLO, D. S. C. CHIZZOTTI, F. H. M. VITOR D. MACHADO, Universidade Federal de Viçosa; DILERMANDO M. DA FONSECA, Universidade Federal de Viçosa; MARINA A. LIMA, Universidade Federal de Viçosa; JANAINA A. MARTUSCELLO, Universidade Federal de São João del-Rei; DOMINGOS SAVIO CAMPOS PACIULLO, CNPGL; FERNANDA H. M. CHIZZOTTI, Universidade Federal de Viçosa. Pastoreio Sistema silvipastoril Altura do dossel Herbage accumulation Light interception Shading Gramínea Forrageira Sombreamento Valor Nutritivo Nutritive value Our objective was to compare herbage accumulation and nutritive value of Urochloa decumbens (Stapf) R. Webster managed under pre-grazing canopy light interception (LI) targets of 90%, 95% and 100% in silvopastoral system (SPS) and 95% in open pasture (OP; U. decumbens under full sunlight) to establish a pre-grazing target for SPS of ~43% shade. The evaluations were made during two rainy seasons and one dry season. The total herbage accumulation in SPS was lower than in OP at all LI targets and seasons. However, the difference in total herbage accumulation between SPS and OP was reduced when SPS was harvested at 95% LI, with reductions of 20% and 28% in both rainy seasons (12,191 × 15,324 kg DM/ha and 11,158 × 15,424 kg DM/ha respectively). Moreover, under 95% LI in SPS, crude protein concentration was 18% and 19% greater than that in OP in both rainy seasons (155 × 131 g/kg DM and 144 × 121 g/kg DM respectively), thus representing the optimal pre-grazing LI target for U. decumbens in SPS. In addition, a canopy height of 20 cm was necessary for 95% LI in OP and a height of 40 cm in SPS. Therefore, U. decumbens should be grazed at 40 cm canopy height, in SPS with ~43% shade to keep 95% LI as the target. However, this target will only be effective if the shade level is maintained, which will reduce height variation over time. 2021-09-26T02:02:45Z 2021-09-26T02:02:45Z 2021-08-13 2020 Artigo de periódico Grass and Forage Science, v. 75, p. 266-278, 2020. http://www.alice.cnptia.embrapa.br/alice/handle/doc/1133540 https://doi.org/10.1111/gfs.12491 Ingles en openAccess |
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Pastoreio Sistema silvipastoril Altura do dossel Herbage accumulation Light interception Shading Gramínea Forrageira Sombreamento Valor Nutritivo Nutritive value Pastoreio Sistema silvipastoril Altura do dossel Herbage accumulation Light interception Shading Gramínea Forrageira Sombreamento Valor Nutritivo Nutritive value |
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Pastoreio Sistema silvipastoril Altura do dossel Herbage accumulation Light interception Shading Gramínea Forrageira Sombreamento Valor Nutritivo Nutritive value Pastoreio Sistema silvipastoril Altura do dossel Herbage accumulation Light interception Shading Gramínea Forrageira Sombreamento Valor Nutritivo Nutritive value MACHADO, V. D. FONSECA, D. M. da LIMA, M. A. MARTUSCELLO, J. A. PACIULLO, D. S. C. CHIZZOTTI, F. H. M. Grazing management strategies for Urochloa decumbens (Stapf) R. Webster in a silvopastoral system under rotational stocking. |
description |
Our objective was to compare herbage accumulation and nutritive value of Urochloa decumbens (Stapf) R. Webster managed under pre-grazing canopy light interception (LI) targets of 90%, 95% and 100% in silvopastoral system (SPS) and 95% in open pasture (OP; U. decumbens under full sunlight) to establish a pre-grazing target for SPS of ~43% shade. The evaluations were made during two rainy seasons and one dry season. The total herbage accumulation in SPS was lower than in OP at all LI targets and seasons. However, the difference in total herbage accumulation between SPS and OP was reduced when SPS was harvested at 95% LI, with reductions of 20% and 28% in both rainy seasons (12,191 × 15,324 kg DM/ha and 11,158 × 15,424 kg DM/ha respectively). Moreover, under 95% LI in SPS, crude protein concentration was 18% and 19% greater than that in OP in both rainy seasons (155 × 131 g/kg DM and 144 × 121 g/kg DM respectively), thus representing the optimal pre-grazing LI target for U. decumbens in SPS. In addition, a canopy height of 20 cm was necessary for 95% LI in OP and a height of 40 cm in SPS. Therefore, U. decumbens should be grazed at 40 cm canopy height, in SPS with ~43% shade to keep 95% LI as the target. However, this target will only be effective if the shade level is maintained, which will reduce height variation over time. |
author2 |
VITOR D. MACHADO, Universidade Federal de Viçosa; DILERMANDO M. DA FONSECA, Universidade Federal de Viçosa; MARINA A. LIMA, Universidade Federal de Viçosa; JANAINA A. MARTUSCELLO, Universidade Federal de São João del-Rei; DOMINGOS SAVIO CAMPOS PACIULLO, CNPGL; FERNANDA H. M. CHIZZOTTI, Universidade Federal de Viçosa. |
author_facet |
VITOR D. MACHADO, Universidade Federal de Viçosa; DILERMANDO M. DA FONSECA, Universidade Federal de Viçosa; MARINA A. LIMA, Universidade Federal de Viçosa; JANAINA A. MARTUSCELLO, Universidade Federal de São João del-Rei; DOMINGOS SAVIO CAMPOS PACIULLO, CNPGL; FERNANDA H. M. CHIZZOTTI, Universidade Federal de Viçosa. MACHADO, V. D. FONSECA, D. M. da LIMA, M. A. MARTUSCELLO, J. A. PACIULLO, D. S. C. CHIZZOTTI, F. H. M. |
format |
Artigo de periódico |
topic_facet |
Pastoreio Sistema silvipastoril Altura do dossel Herbage accumulation Light interception Shading Gramínea Forrageira Sombreamento Valor Nutritivo Nutritive value |
author |
MACHADO, V. D. FONSECA, D. M. da LIMA, M. A. MARTUSCELLO, J. A. PACIULLO, D. S. C. CHIZZOTTI, F. H. M. |
author_sort |
MACHADO, V. D. |
title |
Grazing management strategies for Urochloa decumbens (Stapf) R. Webster in a silvopastoral system under rotational stocking. |
title_short |
Grazing management strategies for Urochloa decumbens (Stapf) R. Webster in a silvopastoral system under rotational stocking. |
title_full |
Grazing management strategies for Urochloa decumbens (Stapf) R. Webster in a silvopastoral system under rotational stocking. |
title_fullStr |
Grazing management strategies for Urochloa decumbens (Stapf) R. Webster in a silvopastoral system under rotational stocking. |
title_full_unstemmed |
Grazing management strategies for Urochloa decumbens (Stapf) R. Webster in a silvopastoral system under rotational stocking. |
title_sort |
grazing management strategies for urochloa decumbens (stapf) r. webster in a silvopastoral system under rotational stocking. |
publishDate |
2021-08-13 |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1133540 https://doi.org/10.1111/gfs.12491 |
work_keys_str_mv |
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