Vegetation composition and forage mass in grassland with a double structure under two winter grazing regimes
ABSTRACT: Remnant areas of Pampas grassland have a distinct double structure. Efficiency of livestock farming on these grasslands depends on practices that are synchronized with natural variation. This study examined the changes in vegetation composition and forage mass during winter to understand the effects of grazing methods in a natural pasture with a double structure that was grazed by heifers. An experimental area in the municipality of Bagé, Rio Grande do Sul, was subjected to continuous or rotational grazing treatments, with two replicates each. Frequency of the structural composition and forage mass of the lower stratum and animal weight was measured at the beginning and end of the experimental period (June 7 to October 7, 2016, respectively). Data were analysed with PCA ordination, regression and variance analysis. Both structural composition and forage mass changed during the experimental period. Axonopus affinis and Paspalum notatum were characteristic of continuous grazing, while Mnesithea selloana and Axonopus argentinus characterized rotational grazing (the latter had the highest levels of forage mass). Although, grazing methods changed the composition of forage mass in winter, they did not affect average daily gain of the animals.
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Universidade Federal de Santa Maria
2018
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oai:scielo:S0103-847820180006006512018-08-20Vegetation composition and forage mass in grassland with a double structure under two winter grazing regimesCoelho,André AlfredoTrindade,José Pedro PereiraVolk,Leandro Bochi da SilvaPinheiro,Clodoaldo LeitesQuadros,Fernando Luiz Ferreira de forage allowance grazing heifers native grassland ABSTRACT: Remnant areas of Pampas grassland have a distinct double structure. Efficiency of livestock farming on these grasslands depends on practices that are synchronized with natural variation. This study examined the changes in vegetation composition and forage mass during winter to understand the effects of grazing methods in a natural pasture with a double structure that was grazed by heifers. An experimental area in the municipality of Bagé, Rio Grande do Sul, was subjected to continuous or rotational grazing treatments, with two replicates each. Frequency of the structural composition and forage mass of the lower stratum and animal weight was measured at the beginning and end of the experimental period (June 7 to October 7, 2016, respectively). Data were analysed with PCA ordination, regression and variance analysis. Both structural composition and forage mass changed during the experimental period. Axonopus affinis and Paspalum notatum were characteristic of continuous grazing, while Mnesithea selloana and Axonopus argentinus characterized rotational grazing (the latter had the highest levels of forage mass). Although, grazing methods changed the composition of forage mass in winter, they did not affect average daily gain of the animals.info:eu-repo/semantics/openAccessUniversidade Federal de Santa MariaCiência Rural v.48 n.6 20182018-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000600651en10.1590/0103-8478cr20170154 |
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Coelho,André Alfredo Trindade,José Pedro Pereira Volk,Leandro Bochi da Silva Pinheiro,Clodoaldo Leites Quadros,Fernando Luiz Ferreira de |
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Coelho,André Alfredo Trindade,José Pedro Pereira Volk,Leandro Bochi da Silva Pinheiro,Clodoaldo Leites Quadros,Fernando Luiz Ferreira de Vegetation composition and forage mass in grassland with a double structure under two winter grazing regimes |
author_facet |
Coelho,André Alfredo Trindade,José Pedro Pereira Volk,Leandro Bochi da Silva Pinheiro,Clodoaldo Leites Quadros,Fernando Luiz Ferreira de |
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Coelho,André Alfredo |
title |
Vegetation composition and forage mass in grassland with a double structure under two winter grazing regimes |
title_short |
Vegetation composition and forage mass in grassland with a double structure under two winter grazing regimes |
title_full |
Vegetation composition and forage mass in grassland with a double structure under two winter grazing regimes |
title_fullStr |
Vegetation composition and forage mass in grassland with a double structure under two winter grazing regimes |
title_full_unstemmed |
Vegetation composition and forage mass in grassland with a double structure under two winter grazing regimes |
title_sort |
vegetation composition and forage mass in grassland with a double structure under two winter grazing regimes |
description |
ABSTRACT: Remnant areas of Pampas grassland have a distinct double structure. Efficiency of livestock farming on these grasslands depends on practices that are synchronized with natural variation. This study examined the changes in vegetation composition and forage mass during winter to understand the effects of grazing methods in a natural pasture with a double structure that was grazed by heifers. An experimental area in the municipality of Bagé, Rio Grande do Sul, was subjected to continuous or rotational grazing treatments, with two replicates each. Frequency of the structural composition and forage mass of the lower stratum and animal weight was measured at the beginning and end of the experimental period (June 7 to October 7, 2016, respectively). Data were analysed with PCA ordination, regression and variance analysis. Both structural composition and forage mass changed during the experimental period. Axonopus affinis and Paspalum notatum were characteristic of continuous grazing, while Mnesithea selloana and Axonopus argentinus characterized rotational grazing (the latter had the highest levels of forage mass). Although, grazing methods changed the composition of forage mass in winter, they did not affect average daily gain of the animals. |
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Universidade Federal de Santa Maria |
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2018 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000600651 |
work_keys_str_mv |
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