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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Pantanal. |
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Data corrente: |
13/06/1995 |
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Data da última atualização: |
13/06/1995 |
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Autoria: |
CHACON, E.; STOBBS, T. H.; SANDLAND, R. L. |
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Título: |
Estimation of herbage consumption by grazing cattle using measurements of eating behaviour. |
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Ano de publicação: |
1976 |
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Fonte/Imprenta: |
Journal of the British Grassland Society, v.31, n.2, p.81-87, 1976. |
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Idioma: |
Inglês
Português |
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Conteúdo: |
Feed consumption (I) of a group of eight non-lacting Jersey cows strip-grazing oats at three stages of growth was estimated from number of cating bites (N) and bite size (S) measurements using the expression, I = N x S. N was measured with four non-fistulated animals while S was determined independently with four oesophageal fistulated animals. These estimates were compared with herbage consumption estimates using a cutting technique (fourteen samples of both herbage offered and refused). Eating behaviour estimates of intake based on N and S were 29% higher than cutting estimates due to fistulated animals having a high number of mastication bites with the head up during sampling and a large diurnal variation in bite size. After allowing for these sources of error eating behaviour estimates were only 2% higher than cutting estimates. Sampling variability was similar for tboth cutting and eating behaviour techniques; on an individual plot basis the poercentage coeficients of variation were 11.2 and 10.1 for cutting and eating behaviour techniques, respectively. Methods for reducting sample variability are discussed and tables of numbers of animals required to deyect true differences in intake at various levels of precision are presented. It is concluded that herbage consumption by grazing animals can be obtained from measurements of eating behaviour. |
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Palavras-Chave: |
Behaviour; Comportamento; FORRAGEIRA; Pasture. |
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Thesagro: |
Gado; Genética; Gramínea; Pastagem. |
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Thesaurus Nal: |
cattle; Jersey. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02062naa a2200265 a 4500
001 1784534
005 1995-06-13
008 1976 bl --- 0-- u #d
100 1 $aCHACON, E.
245 $aEstimation of herbage consumption by grazing cattle using measurements of eating behaviour.
260 $c1976
520 $aFeed consumption (I) of a group of eight non-lacting Jersey cows strip-grazing oats at three stages of growth was estimated from number of cating bites (N) and bite size (S) measurements using the expression, I = N x S. N was measured with four non-fistulated animals while S was determined independently with four oesophageal fistulated animals. These estimates were compared with herbage consumption estimates using a cutting technique (fourteen samples of both herbage offered and refused). Eating behaviour estimates of intake based on N and S were 29% higher than cutting estimates due to fistulated animals having a high number of mastication bites with the head up during sampling and a large diurnal variation in bite size. After allowing for these sources of error eating behaviour estimates were only 2% higher than cutting estimates. Sampling variability was similar for tboth cutting and eating behaviour techniques; on an individual plot basis the poercentage coeficients of variation were 11.2 and 10.1 for cutting and eating behaviour techniques, respectively. Methods for reducting sample variability are discussed and tables of numbers of animals required to deyect true differences in intake at various levels of precision are presented. It is concluded that herbage consumption by grazing animals can be obtained from measurements of eating behaviour.
650 $acattle
650 $aJersey
650 $aGado
650 $aGenética
650 $aGramínea
650 $aPastagem
653 $aBehaviour
653 $aComportamento
653 $aFORRAGEIRA
653 $aPasture
700 1 $aSTOBBS, T. H.
700 1 $aSANDLAND, R. L.
773 $tJournal of the British Grassland Society$gv.31, n.2, p.81-87, 1976.
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Registro original: |
Embrapa Pantanal (CPAP) |
