Model components of forage-fed cattle systems: energy expenditure of grazing cattle and prediction of intake in dairy cows

Tesis para obtener el grado de Doctor of Philosophy, de la University of Florida (Estados Unidos), en 1998

Detalles Bibliográficos
Autor: Rochinotti, Diego
Tipo de recurso: tesis doctoral
Estado:Versión publicada
Fecha de publicación:1998
País:Argentina
Institución:Instituto Nacional de Tecnología Agropecuaria
Repositorio:INTA Digital (INTA)
Idioma:inglés
OAI Identifier:oai:localhost:20.500.12123/6453
Acceso en línea:http://hdl.handle.net/20.500.12123/6453
https://ufdc.ufl.edu/AA00038483/00001/
Access Level:acceso abierto
Palabra clave:Ganado Bovino
Alimentación de los Animales
Pastoreo
Forrajes
Vacas Lecheras
Pastizales
Cattle
Animal Feeding
Grazing
Forage
Dairy Cows
Pastures
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spelling Model components of forage-fed cattle systems: energy expenditure of grazing cattle and prediction of intake in dairy cowsRochinotti, DiegoGanado BovinoAlimentación de los AnimalesPastoreoForrajesVacas LecherasPastizalesCattleAnimal FeedingGrazingForageDairy CowsPasturesTesis para obtener el grado de Doctor of Philosophy, de la University of Florida (Estados Unidos), en 1998The maintenance energy requirements of cattle should include the activity component when cattle are grazing. The prediction of the voluntary dry matter intake (DMI) is also a factor of importance for feed management of cattle. The objectives were to develop a procedure to account for energy maintenance requirement of grazing cattle, and to develop predictive equations for voluntary DMI by dairy cattle fed high-forage diets. A literature review of factors affecting maintenance energy requirements was conducted. It is concluded that the principal factors affecting the additional requirements for maintenance of grazing cattle are the activities of walking and eating. Paddock size is an important factor affecting walking distance and a quadratic equation to calculate walking distance from paddock size is proposed. Adjustments for activity of grazing cattle, walking, ascent, and eating ranged from 15% for cattle grazing small paddocks of high quality forage, and high forage availability, to 70% for cattle grazing large paddocks of low quality forage, with limited forage availability. Data from published experiments with dairy cows fed high- forage diets were used to generate and evaluate equations for the prediction of voluntary DMI . Equations were developed by multiple regression and variable selection procedures. Three equations were evaluated together with three published equations. The equations including only the linear terms of the selected variables resulted in a better sensitivity of the model. The models generated had a mean square prediction error from 4.24 to 4.56 kg2 , lower than that obtained with the published equations. The model selected for voluntary DMI prediction includes body weight, days in milk, production of 4% fat corrected milk, forage dry matter, and diet neutral detergent fiber as independent variables.EEA MercedesFil: Rochinotti, Diego. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes; ArgentinaUniversity of FloridaMoore, John E. (director)2019-12-05T11:23:14Z2019-12-05T11:23:14Z1998info:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_db06info:ar-repo/semantics/tesisDoctoralapplication/pdfhttp://hdl.handle.net/20.500.12123/6453https://ufdc.ufl.edu/AA00038483/00001/enginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuaria2024-05-15T12:24:25Zoai:localhost:20.500.12123/6453instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2024-05-15 12:24:26.203INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Model components of forage-fed cattle systems: energy expenditure of grazing cattle and prediction of intake in dairy cows
title Model components of forage-fed cattle systems: energy expenditure of grazing cattle and prediction of intake in dairy cows
spellingShingle Model components of forage-fed cattle systems: energy expenditure of grazing cattle and prediction of intake in dairy cows
Rochinotti, Diego
Ganado Bovino
Alimentación de los Animales
Pastoreo
Forrajes
Vacas Lecheras
Pastizales
Cattle
Animal Feeding
Grazing
Forage
Dairy Cows
Pastures
title_short Model components of forage-fed cattle systems: energy expenditure of grazing cattle and prediction of intake in dairy cows
title_full Model components of forage-fed cattle systems: energy expenditure of grazing cattle and prediction of intake in dairy cows
title_fullStr Model components of forage-fed cattle systems: energy expenditure of grazing cattle and prediction of intake in dairy cows
title_full_unstemmed Model components of forage-fed cattle systems: energy expenditure of grazing cattle and prediction of intake in dairy cows
title_sort Model components of forage-fed cattle systems: energy expenditure of grazing cattle and prediction of intake in dairy cows
dc.creator.none.fl_str_mv Rochinotti, Diego
author Rochinotti, Diego
author_facet Rochinotti, Diego
author_role author
dc.contributor.none.fl_str_mv Moore, John E. (director)
dc.subject.none.fl_str_mv Ganado Bovino
Alimentación de los Animales
Pastoreo
Forrajes
Vacas Lecheras
Pastizales
Cattle
Animal Feeding
Grazing
Forage
Dairy Cows
Pastures
topic Ganado Bovino
Alimentación de los Animales
Pastoreo
Forrajes
Vacas Lecheras
Pastizales
Cattle
Animal Feeding
Grazing
Forage
Dairy Cows
Pastures
description Tesis para obtener el grado de Doctor of Philosophy, de la University of Florida (Estados Unidos), en 1998
publishDate 1998
dc.date.none.fl_str_mv 1998
2019-12-05T11:23:14Z
2019-12-05T11:23:14Z
dc.type.none.fl_str_mv info:eu-repo/semantics/doctoralThesis
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_db06
info:ar-repo/semantics/tesisDoctoral
format doctoralThesis
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12123/6453
https://ufdc.ufl.edu/AA00038483/00001/
url http://hdl.handle.net/20.500.12123/6453
https://ufdc.ufl.edu/AA00038483/00001/
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv University of Florida
publisher.none.fl_str_mv University of Florida
dc.source.none.fl_str_mv reponame:INTA Digital (INTA)
instname:Instituto Nacional de Tecnología Agropecuaria
instname_str Instituto Nacional de Tecnología Agropecuaria
reponame_str INTA Digital (INTA)
collection INTA Digital (INTA)
repository.name.fl_str_mv INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria
repository.mail.fl_str_mv tripaldi.nicolas@inta.gob.ar
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score 15,81155

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