Forage yield and grazing efficiency on rotationally stocked pastures of 'Tanzania-1' guineagrass and 'Guaçu' elephantgrass
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Scientia Agrícola (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000500004 |
Resumo: | The potential carrying capacity of tropical pastures depends not only on the productivity of the forage species and the amount of forage on offer, but also on the efficiency with which the produced herbage is harvested by the grazing animal. This study was conducted to assess the yield and grazing efficiency on 'Guaçu' elephantgrass (Pennisetum purpureum Schum.) and 'Tanzania-1' guineagrass (Panicum maximum Jacq.) pastures under rotational stocking. Forage accumulation, daily accumulation rates, grazing losses, bulk density, and utilization efficiency were measured. Treatments (forages) were replicated four times in a completely randomized design. Total forage dry matter (DM) yield over 214 days of grazing were 23850 and 15000 kg ha-1, for the elephantgrass and the guineagrass, respectively, using 250 kg N ha-1 in split applications after each grazing. Mean forage accumulation per grazing cycle was 7950 and 5010 kg ha-1 and mean daily accumulation rates were 137 and 86 kg-1 ha-1 d-1 for P. purpureum and P. maximum, respectively. Grazing losses per cycle averaged 1040 and 880 kg ha-1, for grazing efficiencies of 52 and 37% for the Pennisetum and the Panicum, respectively. Mean seasonal stocking rate was 5.1 AU (animal unit = 500 kg LW) per ha on P. purpureum and 3 AU ha-1 on P. maximum pastures. For both species, productivity potential resides on the high pasture carrying capacity, particularly when there are no soil fertility limitations during the warm/rainy season. Based on growth potential and stem elongation characteristics, 'Guaçu' requires better management skills and 'Tanzania-1' has a more pronounced seasonal growth, as expressed by seasonal yields, apparently due to their contrasting responses to temperature and daylength. |
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Forage yield and grazing efficiency on rotationally stocked pastures of 'Tanzania-1' guineagrass and 'Guaçu' elephantgrasslosses due to grazingforage accumulationaccumulation ratesforage allowanceThe potential carrying capacity of tropical pastures depends not only on the productivity of the forage species and the amount of forage on offer, but also on the efficiency with which the produced herbage is harvested by the grazing animal. This study was conducted to assess the yield and grazing efficiency on 'Guaçu' elephantgrass (Pennisetum purpureum Schum.) and 'Tanzania-1' guineagrass (Panicum maximum Jacq.) pastures under rotational stocking. Forage accumulation, daily accumulation rates, grazing losses, bulk density, and utilization efficiency were measured. Treatments (forages) were replicated four times in a completely randomized design. Total forage dry matter (DM) yield over 214 days of grazing were 23850 and 15000 kg ha-1, for the elephantgrass and the guineagrass, respectively, using 250 kg N ha-1 in split applications after each grazing. Mean forage accumulation per grazing cycle was 7950 and 5010 kg ha-1 and mean daily accumulation rates were 137 and 86 kg-1 ha-1 d-1 for P. purpureum and P. maximum, respectively. Grazing losses per cycle averaged 1040 and 880 kg ha-1, for grazing efficiencies of 52 and 37% for the Pennisetum and the Panicum, respectively. Mean seasonal stocking rate was 5.1 AU (animal unit = 500 kg LW) per ha on P. purpureum and 3 AU ha-1 on P. maximum pastures. For both species, productivity potential resides on the high pasture carrying capacity, particularly when there are no soil fertility limitations during the warm/rainy season. Based on growth potential and stem elongation characteristics, 'Guaçu' requires better management skills and 'Tanzania-1' has a more pronounced seasonal growth, as expressed by seasonal yields, apparently due to their contrasting responses to temperature and daylength.Escola Superior de Agricultura "Luiz de Queiroz"2005-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000500004Scientia Agricola v.62 n.5 2005reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0103-90162005000500004info:eu-repo/semantics/openAccessPedreira,Carlos Guilherme SilveiraRosseto,Frederico Alberto de AndradeSilva,Sila Carneiro daNussio,Luiz GustavoMoreno,Leonardo Simões de BarrosLima,Maria Lúcia PereiraLeme,Paulo Robertoeng2005-09-26T00:00:00Zoai:scielo:S0103-90162005000500004Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2005-09-26T00:00Scientia Agrícola (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Forage yield and grazing efficiency on rotationally stocked pastures of 'Tanzania-1' guineagrass and 'Guaçu' elephantgrass |
title |
Forage yield and grazing efficiency on rotationally stocked pastures of 'Tanzania-1' guineagrass and 'Guaçu' elephantgrass |
spellingShingle |
Forage yield and grazing efficiency on rotationally stocked pastures of 'Tanzania-1' guineagrass and 'Guaçu' elephantgrass Pedreira,Carlos Guilherme Silveira losses due to grazing forage accumulation accumulation rates forage allowance |
title_short |
Forage yield and grazing efficiency on rotationally stocked pastures of 'Tanzania-1' guineagrass and 'Guaçu' elephantgrass |
title_full |
Forage yield and grazing efficiency on rotationally stocked pastures of 'Tanzania-1' guineagrass and 'Guaçu' elephantgrass |
title_fullStr |
Forage yield and grazing efficiency on rotationally stocked pastures of 'Tanzania-1' guineagrass and 'Guaçu' elephantgrass |
title_full_unstemmed |
Forage yield and grazing efficiency on rotationally stocked pastures of 'Tanzania-1' guineagrass and 'Guaçu' elephantgrass |
title_sort |
Forage yield and grazing efficiency on rotationally stocked pastures of 'Tanzania-1' guineagrass and 'Guaçu' elephantgrass |
author |
Pedreira,Carlos Guilherme Silveira |
author_facet |
Pedreira,Carlos Guilherme Silveira Rosseto,Frederico Alberto de Andrade Silva,Sila Carneiro da Nussio,Luiz Gustavo Moreno,Leonardo Simões de Barros Lima,Maria Lúcia Pereira Leme,Paulo Roberto |
author_role |
author |
author2 |
Rosseto,Frederico Alberto de Andrade Silva,Sila Carneiro da Nussio,Luiz Gustavo Moreno,Leonardo Simões de Barros Lima,Maria Lúcia Pereira Leme,Paulo Roberto |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Pedreira,Carlos Guilherme Silveira Rosseto,Frederico Alberto de Andrade Silva,Sila Carneiro da Nussio,Luiz Gustavo Moreno,Leonardo Simões de Barros Lima,Maria Lúcia Pereira Leme,Paulo Roberto |
dc.subject.por.fl_str_mv |
losses due to grazing forage accumulation accumulation rates forage allowance |
topic |
losses due to grazing forage accumulation accumulation rates forage allowance |
description |
The potential carrying capacity of tropical pastures depends not only on the productivity of the forage species and the amount of forage on offer, but also on the efficiency with which the produced herbage is harvested by the grazing animal. This study was conducted to assess the yield and grazing efficiency on 'Guaçu' elephantgrass (Pennisetum purpureum Schum.) and 'Tanzania-1' guineagrass (Panicum maximum Jacq.) pastures under rotational stocking. Forage accumulation, daily accumulation rates, grazing losses, bulk density, and utilization efficiency were measured. Treatments (forages) were replicated four times in a completely randomized design. Total forage dry matter (DM) yield over 214 days of grazing were 23850 and 15000 kg ha-1, for the elephantgrass and the guineagrass, respectively, using 250 kg N ha-1 in split applications after each grazing. Mean forage accumulation per grazing cycle was 7950 and 5010 kg ha-1 and mean daily accumulation rates were 137 and 86 kg-1 ha-1 d-1 for P. purpureum and P. maximum, respectively. Grazing losses per cycle averaged 1040 and 880 kg ha-1, for grazing efficiencies of 52 and 37% for the Pennisetum and the Panicum, respectively. Mean seasonal stocking rate was 5.1 AU (animal unit = 500 kg LW) per ha on P. purpureum and 3 AU ha-1 on P. maximum pastures. For both species, productivity potential resides on the high pasture carrying capacity, particularly when there are no soil fertility limitations during the warm/rainy season. Based on growth potential and stem elongation characteristics, 'Guaçu' requires better management skills and 'Tanzania-1' has a more pronounced seasonal growth, as expressed by seasonal yields, apparently due to their contrasting responses to temperature and daylength. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005-10-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000500004 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000500004 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-90162005000500004 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Escola Superior de Agricultura "Luiz de Queiroz" |
publisher.none.fl_str_mv |
Escola Superior de Agricultura "Luiz de Queiroz" |
dc.source.none.fl_str_mv |
Scientia Agricola v.62 n.5 2005 reponame:Scientia Agrícola (Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Scientia Agrícola (Online) |
collection |
Scientia Agrícola (Online) |
repository.name.fl_str_mv |
Scientia Agrícola (Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
scientia@usp.br||alleoni@usp.br |
_version_ |
1748936459749949440 |