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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
17/01/2019 |
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Data da última atualização: |
03/07/2023 |
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Autoria: |
PULINA, G.; AVONDO, M.; MOLLE, G.; FRANCESCONI, A. H. D.; ATZORI, A. S.; CANNAS, A. |
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Afiliação: |
Giuseppe Pulina, Dipartimento di AGRARIA, University of Sassari, Sassari, Italy.; Marcella Avondo, Dipartimento di Scienze delle Produzioni Agrarie e Alimentari, University of Catania, Catania, Italy.; Giovanni Molle, Department of Animal Production, AGRIS Sardegna, Bonassai, Sassari, Italy.; Ana Helena Dias Francesconi; Alberto Stanislao Atzori; Antonello Cannas. |
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Título: |
Models for estimating feed intake in small ruminants. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Revista Brasileira de Zootecnia, v. 42, n. 9, p. 675-690, 2013. |
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DOI: |
http://dx.doi.org/10.1590/S1516-35982013000900010 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: This review deals with the most relevant limits and developments of the modeling of intake of sheep and goats reared intensively and extensively. Because small ruminants are normally fed ad libitum, voluntary feed intake is crucial in feeding tactics and strategies aimed at optimal animal production. The effects of genetic, neuroendocrine, hormonal, feed and environmental factors on voluntary feed intake were discussed. Then, several mathematical models to estimate dry matter intake (DMI) were examined, with emphasis on empirical models for sheep and goats in intensive farm systems or in extensive areas under pasture or rangeland conditions. A sensitivity analysis of four models of prediction of DMI in housed lactating dairy sheep and meat sheep breeds was also presented. This work evidenced a large variability in the approaches used and in the variables considered for housed sheep and goats. Regarding the estimation of feed intake for grazing sheep and browsing goats, the accuracy of estimates based on empirical models developed so far is very low when applied out of the boundaries of the studied system. Feeding experiments indoors and outdoors remain fundamental for a better modeling and understanding of the interactions between feeds and small ruminants. However, there is a need for biological and theoretical frameworks in which these experiments should be carried out, so that appropriate empirical or mechanistic equations to predict DMI could be developed. |
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Thesaurus Nal: |
Dry matter intake; Feed intake; Feedlots; Goats; Grazing; Sheep feeding. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02236naa a2200265 a 4500
001 2104460
005 2023-07-03
008 2013 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1590/S1516-35982013000900010$2DOI
100 1 $aPULINA, G.
245 $aModels for estimating feed intake in small ruminants.$h[electronic resource]
260 $c2013
520 $aAbstract: This review deals with the most relevant limits and developments of the modeling of intake of sheep and goats reared intensively and extensively. Because small ruminants are normally fed ad libitum, voluntary feed intake is crucial in feeding tactics and strategies aimed at optimal animal production. The effects of genetic, neuroendocrine, hormonal, feed and environmental factors on voluntary feed intake were discussed. Then, several mathematical models to estimate dry matter intake (DMI) were examined, with emphasis on empirical models for sheep and goats in intensive farm systems or in extensive areas under pasture or rangeland conditions. A sensitivity analysis of four models of prediction of DMI in housed lactating dairy sheep and meat sheep breeds was also presented. This work evidenced a large variability in the approaches used and in the variables considered for housed sheep and goats. Regarding the estimation of feed intake for grazing sheep and browsing goats, the accuracy of estimates based on empirical models developed so far is very low when applied out of the boundaries of the studied system. Feeding experiments indoors and outdoors remain fundamental for a better modeling and understanding of the interactions between feeds and small ruminants. However, there is a need for biological and theoretical frameworks in which these experiments should be carried out, so that appropriate empirical or mechanistic equations to predict DMI could be developed.
650 $aDry matter intake
650 $aFeed intake
650 $aFeedlots
650 $aGoats
650 $aGrazing
650 $aSheep feeding
700 1 $aAVONDO, M.
700 1 $aMOLLE, G.
700 1 $aFRANCESCONI, A. H. D.
700 1 $aATZORI, A. S.
700 1 $aCANNAS, A.
773 $tRevista Brasileira de Zootecnia$gv. 42, n. 9, p. 675-690, 2013.
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| 2. |  | BOAVENTURA NETO, O.; TEIXEIRA, I. A. M. de A.; CANNAS, A.; MENDONCA, A. N.; SOUZA, S. F. de; OLIVIERA, D. de; FIGUEIREDO, F. O. de M.; LIMA, L. D. de. Equações para estimar a composição corporal em caprinos Saanen na fase inicial de crescimento. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 49., Brasília, DF. A produção animal no mundo em transformação: Anais. Brasília: SBZ, 2012.| Tipo: Artigo em Anais de Congresso |
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