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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
24/11/1997 |
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Data da última atualização: |
03/10/2016 |
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Autoria: |
ABATE, A. L.; MAYER, M. |
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Título: |
Prediction of the useful energy in tropical feeds from proximate composition and in vivo derived energetic contents. 2. Starch equivalents. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
Small Ruminant Research, v. 25, n. 1, p. 61-68, 1997. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Starch equivalent (SE) values of 345 tropical forages and 37 concentrates derived from digestibility experiments with sheep and cattle formed the data set. Through multiple regression analyses, SE was related to linear, quadratic and cubic terms of the nutrients CP, ether extract (EE), crude fibre (CF), NFE and ash as independent variables. The models were assessed by coefficient of determination (R2) and practicality. Under these conditions the following prediction equations were recommended: (a) forages: SE (%) = ? 19.48 + 1.4329CP + 2.4494EE + 0.8083NFE; R2 = 0.46, P < 0.0001, RSD = 6.89%; SE (%) = 134.70 ? 1.5703CF ? 0.7180NFE ? 1.4327ASH; R2 = 0.45, P < 0.0001, RSD = 6.94%; SE (%) = 65.11 + 0.7427CP ? 0.8789CF ? 0.7301ASH; R2 = 0.44, P < 0.0001, RSD = 6.99%; SE (%) = 71.48 ? 1.1155CF; R2 = 0.33, P < 0.0001, RSD = 7.65% (b) concentrates: SE (%) = ? 36.46 + 6.1478CF ? 0.6414CF2 + 0.0158CF3 + 7.7236NFE ?0.1649NFE2 + 0.0010NFE3; R2 = 0.67, P < 0.0001, RSD = 7.76%; SE (%) = 80.15 ? 1.2200CF + 1.1005EE; R2 = 0.42, P < 0.0001, RSD = 10.30%.
Crude fibre had a strong influence in the prediction of SE, although it was preferable to predict SE using a combination of nutrients because of a substantial increase in R2. It was concluded that SE may be estimated using our predictors to within a range of ± 8.8 to 9.8% for tropical forages and to within ± 9.9 to 13.2% for concentrates with a probability of 80%. This level of accuracy was considered high given the diverse nature of the feeds and the wide tropical area for which the predictors may be applied. MenosAbstract: Starch equivalent (SE) values of 345 tropical forages and 37 concentrates derived from digestibility experiments with sheep and cattle formed the data set. Through multiple regression analyses, SE was related to linear, quadratic and cubic terms of the nutrients CP, ether extract (EE), crude fibre (CF), NFE and ash as independent variables. The models were assessed by coefficient of determination (R2) and practicality. Under these conditions the following prediction equations were recommended: (a) forages: SE (%) = ? 19.48 + 1.4329CP + 2.4494EE + 0.8083NFE; R2 = 0.46, P < 0.0001, RSD = 6.89%; SE (%) = 134.70 ? 1.5703CF ? 0.7180NFE ? 1.4327ASH; R2 = 0.45, P < 0.0001, RSD = 6.94%; SE (%) = 65.11 + 0.7427CP ? 0.8789CF ? 0.7301ASH; R2 = 0.44, P < 0.0001, RSD = 6.99%; SE (%) = 71.48 ? 1.1155CF; R2 = 0.33, P < 0.0001, RSD = 7.65% (b) concentrates: SE (%) = ? 36.46 + 6.1478CF ? 0.6414CF2 + 0.0158CF3 + 7.7236NFE ?0.1649NFE2 + 0.0010NFE3; R2 = 0.67, P < 0.0001, RSD = 7.76%; SE (%) = 80.15 ? 1.2200CF + 1.1005EE; R2 = 0.42, P < 0.0001, RSD = 10.30%.
Crude fibre had a strong influence in the prediction of SE, although it was preferable to predict SE using a combination of nutrients because of a substantial increase in R2. It was concluded that SE may be estimated using our predictors to within a range of ± 8.8 to 9.8% for tropical forages and to within ± 9.9 to 13.2% for concentrates with a probability of 80%. This level of accuracy was considered high given the diverse nature... Mostrar Tudo |
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Thesagro: |
Amido; Energia; Forragem; Ovino. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02128naa a2200181 a 4500
001 1517802
005 2016-10-03
008 1997 bl uuuu u00u1 u #d
100 1 $aABATE, A. L.
245 $aPrediction of the useful energy in tropical feeds from proximate composition and in vivo derived energetic contents. 2. Starch equivalents.
260 $c1997
520 $aAbstract: Starch equivalent (SE) values of 345 tropical forages and 37 concentrates derived from digestibility experiments with sheep and cattle formed the data set. Through multiple regression analyses, SE was related to linear, quadratic and cubic terms of the nutrients CP, ether extract (EE), crude fibre (CF), NFE and ash as independent variables. The models were assessed by coefficient of determination (R2) and practicality. Under these conditions the following prediction equations were recommended: (a) forages: SE (%) = ? 19.48 + 1.4329CP + 2.4494EE + 0.8083NFE; R2 = 0.46, P < 0.0001, RSD = 6.89%; SE (%) = 134.70 ? 1.5703CF ? 0.7180NFE ? 1.4327ASH; R2 = 0.45, P < 0.0001, RSD = 6.94%; SE (%) = 65.11 + 0.7427CP ? 0.8789CF ? 0.7301ASH; R2 = 0.44, P < 0.0001, RSD = 6.99%; SE (%) = 71.48 ? 1.1155CF; R2 = 0.33, P < 0.0001, RSD = 7.65% (b) concentrates: SE (%) = ? 36.46 + 6.1478CF ? 0.6414CF2 + 0.0158CF3 + 7.7236NFE ?0.1649NFE2 + 0.0010NFE3; R2 = 0.67, P < 0.0001, RSD = 7.76%; SE (%) = 80.15 ? 1.2200CF + 1.1005EE; R2 = 0.42, P < 0.0001, RSD = 10.30%. Crude fibre had a strong influence in the prediction of SE, although it was preferable to predict SE using a combination of nutrients because of a substantial increase in R2. It was concluded that SE may be estimated using our predictors to within a range of ± 8.8 to 9.8% for tropical forages and to within ± 9.9 to 13.2% for concentrates with a probability of 80%. This level of accuracy was considered high given the diverse nature of the feeds and the wide tropical area for which the predictors may be applied.
650 $aAmido
650 $aEnergia
650 $aForragem
650 $aOvino
700 1 $aMAYER, M.
773 $tSmall Ruminant Research$gv. 25, n. 1, p. 61-68, 1997.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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