Comparative digestion of herbage by two breeds of sheep: effects of grass maturity stage and level of intake

10 pages, 4 tables, 3 figures.

Detalhes bibliográficos
Autores: López, Secundino, Frutos, Pilar, Mantecón, Ángel R., Giráldez, Francisco Javier
Formato: artículo
Fecha de publicación:2001
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/13287
Acesso em linha:http://hdl.handle.net/10261/13287
Access Level:acceso abierto
Palavra-chave:Digestibility
Food intake
Herbage
Rumen digestion
Sheep breeds
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spelling Comparative digestion of herbage by two breeds of sheep: effects of grass maturity stage and level of intakeLópez, SecundinoFrutos, PilarMantecón, Ángel R.Giráldez, Francisco JavierDigestibilityFood intakeHerbageRumen digestionSheep breeds10 pages, 4 tables, 3 figures.Two trials were conducted to study the effect of the stage of maturity of fresh herbage on its digestibility by two breeds of sheep (Churra v. Merino). The sward consisted of a mixture of grasses and clover, and was harvested either in late May (early cut, EC) or in late July (late cut, LC). In each trial, 12 mature sheep of each breed were used. Each animal received a different amount of fresh herbage, so that levels of food intake ranged between 8(.)1 and 24(.)7g dry matter (DM) per kg body weight per day. EC herbage showed higher crude protein content (116 v. 67g/kg DM), lower neutral-detergent fibre concentration (494 v. 664 g/kg DM) and higher DM digestibility (0(.)687 (s.e. 0(.)005) v. 0(.)463 (s.e. 0(.)007)) than the LC herbage. DM digestibility coefficients observed in Churra (0(.)694 (s.e. 0(.)028)for EC and 0(.)476 (s.e. 0(.)028)for LC herbage) tended to be greater than those observed in Merino sheep (0(.)680 (s.e. 0(.)021) for EC and 0(.)452 (s.e. 0(.)040) for LC herbage). With the EC herbage DM digestibility tended to decrease as the level of intake increased. Samples of dried herbage were incubated in the rumen of Churra and Merino sheep to determine the DM degradability by the in situ technique. Fractional degradation rates (c values) were significantly faster in the rumen of Churra than in Merino (0(.)046 (s.e. 0(.)003) v. 0(.)031, (s.e. 0(.)002)), with large differences between breeds in the DM disappearance rates at intermediate incubation times, and no significant differences between Churra and Merino sheep in the mean a + b values, Microbial N supply, calculated from the urinary excretion of purine derivatives, was significantly affected by the herbage maturity stage and by the level of DM intake, but not by the breed of sheep. It is suggested that differences between breeds of sheep in food digestibility may be related to their ability to digest fibrous diets.Financial support received from Comisión Interministerial de Ciencia y Tecnología of Spain (Project AGF98-0188) is gratefully acknowledged.Peer reviewedCambridge University PressBritish Society of Animal Science200920092001info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_65018333525 bytesapplication/pdfhttp://hdl.handle.net/10261/13287reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://www.bsas.org.uk/Publications/Animal_Science/2001/info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/132872026-05-22T06:33:51Z
dc.title.none.fl_str_mv Comparative digestion of herbage by two breeds of sheep: effects of grass maturity stage and level of intake
title Comparative digestion of herbage by two breeds of sheep: effects of grass maturity stage and level of intake
spellingShingle Comparative digestion of herbage by two breeds of sheep: effects of grass maturity stage and level of intake
López, Secundino
Digestibility
Food intake
Herbage
Rumen digestion
Sheep breeds
title_short Comparative digestion of herbage by two breeds of sheep: effects of grass maturity stage and level of intake
title_full Comparative digestion of herbage by two breeds of sheep: effects of grass maturity stage and level of intake
title_fullStr Comparative digestion of herbage by two breeds of sheep: effects of grass maturity stage and level of intake
title_full_unstemmed Comparative digestion of herbage by two breeds of sheep: effects of grass maturity stage and level of intake
title_sort Comparative digestion of herbage by two breeds of sheep: effects of grass maturity stage and level of intake
dc.creator.none.fl_str_mv López, Secundino
Frutos, Pilar
Mantecón, Ángel R.
Giráldez, Francisco Javier
author López, Secundino
author_facet López, Secundino
Frutos, Pilar
Mantecón, Ángel R.
Giráldez, Francisco Javier
author_role author
author2 Frutos, Pilar
Mantecón, Ángel R.
Giráldez, Francisco Javier
author2_role author
author
author
dc.subject.none.fl_str_mv Digestibility
Food intake
Herbage
Rumen digestion
Sheep breeds
topic Digestibility
Food intake
Herbage
Rumen digestion
Sheep breeds
description 10 pages, 4 tables, 3 figures.
publishDate 2001
dc.date.none.fl_str_mv 2001
2009
2009
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/13287
url http://hdl.handle.net/10261/13287
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://www.bsas.org.uk/Publications/Animal_Science/2001/
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 8333525 bytes
application/pdf
dc.publisher.none.fl_str_mv Cambridge University Press
British Society of Animal Science
publisher.none.fl_str_mv Cambridge University Press
British Society of Animal Science
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869405877398667264
score 15,812455

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