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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
07/06/1995 |
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Data da última atualização: |
07/06/1995 |
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Autoria: |
ANDREASI, F.; MASOTTI, N.; VEIGA, J. S. M. |
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Título: |
Aplicabilidade dos metodos indicadores - oxido cromico e cromogenios - para a determinacao da digestibilidade a.parente, em Zebu (Bos indicus). |
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Ano de publicação: |
1960 |
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Fonte/Imprenta: |
Revista da Faculdade de Medicina Veterinaria, Sao Paulo, v.6, n.4, p.401-433, 1960. |
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Idioma: |
Português |
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Conteúdo: |
A trial was carried out the objectives of which were: a) to examine the applicability of the indicator methods - chronic oxide and chromogens - for determining the apparent digestibility and, b) to study the excretion pattern of the two indicators. As experimental animals, were used young Brahman cattle (Bos indicus) that were born free on the range while the experiment was conducted in the stall. A small amount of chromic oxide was administrated in gelatine capsules once daily and the animals received a ration containing concentrate and roughages - Sugar cane (Sacharum officinarum L.) and Guatemala grass (Tripsacum laxum, Nash). Fecal samples were taken at 6 A.M., noon and 6 P.M. Feces were also totally collected during 7 days of the same collection period. Chromic oxide per cent of fecal dry matter and chromogens in units per gram of roughage or feces (dry basis), were determined on all the samples. The results referring to the digestibility obtained by the chromic oxide method comparing with the concentional showed significant differences in total, noon and 6 P.M., collections periods. The pooled values from 6 A.M. and noon, at one side, and 6 A.M., noon and 6 P.M., at the other, showed no significant differences in relation with the conventional. In spite of the fact that a reduced number of chromogens units was found in the roughages and fecal samples, the results obtained with this method, exception made to the noon collection period, compared with the conventional, showed no significant differences. As it occurs with European cattle, the hand-feed animals showed the highest recovery level of chromic oxide at 6 A.M. and the lowest at 6 P.M. Part of the variability was probably associated with the recognized variation in the total amount of feces voided from day to day and during the hours of the same day. The total fecal output during the interval of time between 6 A.M. till 6 P.M. was 30% higher than during the same period at night. It was also recognized that complete recovery of ingested chromic oxide from the feces is not essential in the computation of digestibility. The data suggested that sampling times should be selected, so that the most accurate estimates of digestibility may be obtained. It appears more important to secure aliquots of feces samples than to obtain equal weights of them due to the large variations in the excretion pattern. The digestibility coefficients found in relation with the nutrients of the ration, disclosed that the chromic oxide method presented also lower results than the other two methods investigated. The highest digestibility levels were found for the crude fiber and fat. In Brahman cattle, it was observed that the preliminary period maybe shortened by five or six days, maybe due to the smaller intestinal tract compared with the European cattle (Bos taurus). MenosA trial was carried out the objectives of which were: a) to examine the applicability of the indicator methods - chronic oxide and chromogens - for determining the apparent digestibility and, b) to study the excretion pattern of the two indicators. As experimental animals, were used young Brahman cattle (Bos indicus) that were born free on the range while the experiment was conducted in the stall. A small amount of chromic oxide was administrated in gelatine capsules once daily and the animals received a ration containing concentrate and roughages - Sugar cane (Sacharum officinarum L.) and Guatemala grass (Tripsacum laxum, Nash). Fecal samples were taken at 6 A.M., noon and 6 P.M. Feces were also totally collected during 7 days of the same collection period. Chromic oxide per cent of fecal dry matter and chromogens in units per gram of roughage or feces (dry basis), were determined on all the samples. The results referring to the digestibility obtained by the chromic oxide method comparing with the concentional showed significant differences in total, noon and 6 P.M., collections periods. The pooled values from 6 A.M. and noon, at one side, and 6 A.M., noon and 6 P.M., at the other, showed no significant differences in relation with the conventional. In spite of the fact that a reduced number of chromogens units was found in the roughages and fecal samples, the results obtained with this method, exception made to the noon collection period, compared with the conventional, sh... Mostrar Tudo |
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Palavras-Chave: |
Bovine. |
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Thesagro: |
Bos Indicus; Bos Taurus; Bovino; Digestibilidade; Excreção; Nutrição. |
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Thesaurus Nal: |
digestibility; excretion; nutrition; zebu. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03651naa a2200277 a 4500
001 1784360
005 1995-06-07
008 1960 bl --- 0-- u #d
100 1 $aANDREASI, F.
245 $aAplicabilidade dos metodos indicadores - oxido cromico e cromogenios - para a determinacao da digestibilidade a.parente, em Zebu (Bos indicus).
260 $c1960
520 $aA trial was carried out the objectives of which were: a) to examine the applicability of the indicator methods - chronic oxide and chromogens - for determining the apparent digestibility and, b) to study the excretion pattern of the two indicators. As experimental animals, were used young Brahman cattle (Bos indicus) that were born free on the range while the experiment was conducted in the stall. A small amount of chromic oxide was administrated in gelatine capsules once daily and the animals received a ration containing concentrate and roughages - Sugar cane (Sacharum officinarum L.) and Guatemala grass (Tripsacum laxum, Nash). Fecal samples were taken at 6 A.M., noon and 6 P.M. Feces were also totally collected during 7 days of the same collection period. Chromic oxide per cent of fecal dry matter and chromogens in units per gram of roughage or feces (dry basis), were determined on all the samples. The results referring to the digestibility obtained by the chromic oxide method comparing with the concentional showed significant differences in total, noon and 6 P.M., collections periods. The pooled values from 6 A.M. and noon, at one side, and 6 A.M., noon and 6 P.M., at the other, showed no significant differences in relation with the conventional. In spite of the fact that a reduced number of chromogens units was found in the roughages and fecal samples, the results obtained with this method, exception made to the noon collection period, compared with the conventional, showed no significant differences. As it occurs with European cattle, the hand-feed animals showed the highest recovery level of chromic oxide at 6 A.M. and the lowest at 6 P.M. Part of the variability was probably associated with the recognized variation in the total amount of feces voided from day to day and during the hours of the same day. The total fecal output during the interval of time between 6 A.M. till 6 P.M. was 30% higher than during the same period at night. It was also recognized that complete recovery of ingested chromic oxide from the feces is not essential in the computation of digestibility. The data suggested that sampling times should be selected, so that the most accurate estimates of digestibility may be obtained. It appears more important to secure aliquots of feces samples than to obtain equal weights of them due to the large variations in the excretion pattern. The digestibility coefficients found in relation with the nutrients of the ration, disclosed that the chromic oxide method presented also lower results than the other two methods investigated. The highest digestibility levels were found for the crude fiber and fat. In Brahman cattle, it was observed that the preliminary period maybe shortened by five or six days, maybe due to the smaller intestinal tract compared with the European cattle (Bos taurus).
650 $adigestibility
650 $aexcretion
650 $anutrition
650 $azebu
650 $aBos Indicus
650 $aBos Taurus
650 $aBovino
650 $aDigestibilidade
650 $aExcreção
650 $aNutrição
653 $aBovine
700 1 $aMASOTTI, N.
700 1 $aVEIGA, J. S. M.
773 $tRevista da Faculdade de Medicina Veterinaria, Sao Paulo$gv.6, n.4, p.401-433, 1960.
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Embrapa Pantanal (CPAP) |
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