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Registro Completo |
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Biblioteca(s): |
Embrapa Suínos e Aves. |
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Data corrente: |
01/09/1998 |
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Data da última atualização: |
11/07/2007 |
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Autoria: |
COOK, D. A. |
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Título: |
The conceptual analysis of a dynamic mathematical model for the estimation of the amino acid requirements for pigs from weaning to maturity. |
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Ano de publicação: |
1991 |
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Fonte/Imprenta: |
Urbana: University of Illinois at Urbana-Champaign, 1991. |
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Páginas: |
168p. |
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Idioma: |
Inglês |
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Notas: |
Tese Doutorado |
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Conteúdo: |
A deterministic model for the prediction of amino acid requirements ofgrowing pigs was developed. Comparisons between model outputs and literature values indicated that the model adequately predicts amino acid requirements. During the development of the model, limitations in the literature were identified. Therefore, the following experiments were conducted to provide needed components of the model. Two experiments were conduced to characterize the potential gain in body nitrogen (GBN)of growing pigs. In experiment 1, pigs were grow from weaning to 150 kg to characterize protein and fat growth. In experiment 2, proximate analysis of the whole body of pigs raised to maturity provided estimates of the nitrogen content of the body at maturity (NBmx). The following equation was used to characterize GBN: GBN = KNmx* FFBWaN* ((NBmx-BN)/NBmx). From data colleted above, three relationships were used to describe DE intake. Two exponential equations, containing body weight (BW) or body protein (BP) as variables, were used. Use of BP in place ofBW did not improve the statistical fit of the equation. Calculation ofDE intake from estimated utilization of energy provided values that followed a similar pattern but were consistently lower than observed feed intakes. An experiment was conducted to quantify the effect of energy density on DE intake and growth. Four DE levels (2.9, 3.2, 3.5 and 3.8 Mcal DE/kg) were fed. Increasing DE content resulted in a quadraticresponse (P<.01) for ADG and gain/feed and a cubic response (P<.05) for daily DE intake. A response surface regression (R2=.93) was used to describe the change in DE intake relative to DE concentration and BW. In a final experiment, the effect of energy intake on protein and fat growth was investigated. Treatments consisted of four levels of feed intake: ad libitum (100%), 70%, 50% and 30%. Increasing ME intake resulted in a quadratic response (P<.05) for ADG and gain/feed. The response of GBN was dependent upon gender and BW gain in body fat response linearly (P<.001). An equation to describe GBN relative to BW and ME intake was developed. The use of fat-free BW in place of BW did not improve the statistical fit. MenosA deterministic model for the prediction of amino acid requirements ofgrowing pigs was developed. Comparisons between model outputs and literature values indicated that the model adequately predicts amino acid requirements. During the development of the model, limitations in the literature were identified. Therefore, the following experiments were conducted to provide needed components of the model. Two experiments were conduced to characterize the potential gain in body nitrogen (GBN)of growing pigs. In experiment 1, pigs were grow from weaning to 150 kg to characterize protein and fat growth. In experiment 2, proximate analysis of the whole body of pigs raised to maturity provided estimates of the nitrogen content of the body at maturity (NBmx). The following equation was used to characterize GBN: GBN = KNmx* FFBWaN* ((NBmx-BN)/NBmx). From data colleted above, three relationships were used to describe DE intake. Two exponential equations, containing body weight (BW) or body protein (BP) as variables, were used. Use of BP in place ofBW did not improve the statistical fit of the equation. Calculation ofDE intake from estimated utilization of energy provided values that followed a similar pattern but were consistently lower than observed feed intakes. An experiment was conducted to quantify the effect of energy density on DE intake and growth. Four DE levels (2.9, 3.2, 3.5 and 3.8 Mcal DE/kg) were fed. Increasing DE content resulted in a quadraticresponse (P<.01) for ADG and ... Mostrar Tudo |
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Palavras-Chave: |
Amino acid; Growing; Mathematical model; Predicao; Requerimento; Requirements. |
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Thesagro: |
Aminoácido; Crescimento; Modelo Matemático; Suíno; Terminação. |
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Thesaurus Nal: |
finishing; prediction; swine. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03038nam a2200301 a 4500
001 1433532
005 2007-07-11
008 1991 bl uuuu m 00u1 u #d
100 1 $aCOOK, D. A.
245 $aThe conceptual analysis of a dynamic mathematical model for the estimation of the amino acid requirements for pigs from weaning to maturity.
260 $aUrbana: University of Illinois at Urbana-Champaign$c1991
300 $a168p.
500 $aTese Doutorado
520 $aA deterministic model for the prediction of amino acid requirements ofgrowing pigs was developed. Comparisons between model outputs and literature values indicated that the model adequately predicts amino acid requirements. During the development of the model, limitations in the literature were identified. Therefore, the following experiments were conducted to provide needed components of the model. Two experiments were conduced to characterize the potential gain in body nitrogen (GBN)of growing pigs. In experiment 1, pigs were grow from weaning to 150 kg to characterize protein and fat growth. In experiment 2, proximate analysis of the whole body of pigs raised to maturity provided estimates of the nitrogen content of the body at maturity (NBmx). The following equation was used to characterize GBN: GBN = KNmx* FFBWaN* ((NBmx-BN)/NBmx). From data colleted above, three relationships were used to describe DE intake. Two exponential equations, containing body weight (BW) or body protein (BP) as variables, were used. Use of BP in place ofBW did not improve the statistical fit of the equation. Calculation ofDE intake from estimated utilization of energy provided values that followed a similar pattern but were consistently lower than observed feed intakes. An experiment was conducted to quantify the effect of energy density on DE intake and growth. Four DE levels (2.9, 3.2, 3.5 and 3.8 Mcal DE/kg) were fed. Increasing DE content resulted in a quadraticresponse (P<.01) for ADG and gain/feed and a cubic response (P<.05) for daily DE intake. A response surface regression (R2=.93) was used to describe the change in DE intake relative to DE concentration and BW. In a final experiment, the effect of energy intake on protein and fat growth was investigated. Treatments consisted of four levels of feed intake: ad libitum (100%), 70%, 50% and 30%. Increasing ME intake resulted in a quadratic response (P<.05) for ADG and gain/feed. The response of GBN was dependent upon gender and BW gain in body fat response linearly (P<.001). An equation to describe GBN relative to BW and ME intake was developed. The use of fat-free BW in place of BW did not improve the statistical fit.
650 $afinishing
650 $aprediction
650 $aswine
650 $aAminoácido
650 $aCrescimento
650 $aModelo Matemático
650 $aSuíno
650 $aTerminação
653 $aAmino acid
653 $aGrowing
653 $aMathematical model
653 $aPredicao
653 $aRequerimento
653 $aRequirements
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Registro original: |
Embrapa Suínos e Aves (CNPSA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Acre. |
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Data corrente: |
04/04/2006 |
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Data da última atualização: |
28/06/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Nacional - A |
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Autoria: |
CARDOSO, G. C.; GARCIA, R.; SOUZA, A. L. de; PEREIRA, O. G.; ANDRADE, C. M. S. de; PIRES, A. J. V.; BERNARDINO, F. S. |
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Afiliação: |
Gláucon César Cardoso; Rasmo Garcia, UFV; Alexandre Lima de Souza, UFMT; Odilon Gomes Pereira, UFV; CARLOS MAURICIO SOARES DE ANDRADE, CPAF-AC; Aureliano José Vieira Pires, UESB; Fernando Salgado Bernardino, UFV. |
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Título: |
Desempenho de novilhos Simental alimentados com silagem de sorgo, cana-de-açúcar e palhada de arroz tratada ou não com amônia anidra. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Revista Brasileira de Zootecnia, Piracicaba, v. 33, n. 6, p. 2132-2139, 2004. Suplemento 2. |
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ISSN: |
1806-9290 (online) |
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DOI: |
10.1590/S1516-35982004000800026. |
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Idioma: |
Português |
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Conteúdo: |
Avaliou-se o desempenho de novilhos alimentados com dietas contendo palhada de arroz amonizada, palhada de arroz + uréia, cana-de-açúcar + uréia e silagem de sorgo. Utilizaram-se 16 novilhos, Simental PO, com peso vivo médio de 400 kg, distribuídos em delineamento inteiramente casualizado. O experimento teve duração de 88 dias, sendo 15 de adaptação e 61 dias de avaliação, divididos em três períodos de 21 dias. O consumo total de MS, que variou de 7,1 a 10,0 kg/dia, diferiu entre as dietas, registrando-se maiores consumos para os animais que receberam dietas contendo palhada de arroz amonizada e silagem de sorgo, que, por sua vez, não diferiram entre si. A conversão alimentar não diferiu entre as diferentes dietas, registrando-se valor médio de 6,6. Observou-se maior ganho de peso para os animais que receberam palhada de arroz amonizada (1,59 kg/dia) em relação à palhada mais uréia (1,25 kg/dia). O efeito da amonização, melhorando o valor nutritivo da palhada de arroz, resultou em maior consumo voluntário deste volumoso e, conseqüentemente, em maior ganho diário de peso vivo dos animais, em relação à palhada de arroz não-tratada e suplementada com uréia. |
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Palavras-Chave: |
Amônia anidra; Anydrous ammonia; Caña de azucar; Ensilado de sorgo; Ganado de carne; Nutrición animal; Paja de arroz; Raça Simental; Simental steers; Terneros. |
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Thesagro: |
Cana de açúcar; Novilho de corte; Nutrição animal; Palha de arroz; Silagem; Sorgo; Uréia. |
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Thesaurus NAL: |
Animal nutrition; Beef cattle; Rice straw; Sorghum silage; Steers; Sugarcane; Urea. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/112454/1/12806.pdf
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Marc: |
LEADER 02665naa a2200505 a 4500
001 1503936
005 2021-06-28
008 2004 bl uuuu u00u1 u #d
022 $a1806-9290 (online)
024 7 $a10.1590/S1516-35982004000800026.$2DOI
100 1 $aCARDOSO, G. C.
245 $aDesempenho de novilhos Simental alimentados com silagem de sorgo, cana-de-açúcar e palhada de arroz tratada ou não com amônia anidra.$h[electronic resource]
260 $c2004
520 $aAvaliou-se o desempenho de novilhos alimentados com dietas contendo palhada de arroz amonizada, palhada de arroz + uréia, cana-de-açúcar + uréia e silagem de sorgo. Utilizaram-se 16 novilhos, Simental PO, com peso vivo médio de 400 kg, distribuídos em delineamento inteiramente casualizado. O experimento teve duração de 88 dias, sendo 15 de adaptação e 61 dias de avaliação, divididos em três períodos de 21 dias. O consumo total de MS, que variou de 7,1 a 10,0 kg/dia, diferiu entre as dietas, registrando-se maiores consumos para os animais que receberam dietas contendo palhada de arroz amonizada e silagem de sorgo, que, por sua vez, não diferiram entre si. A conversão alimentar não diferiu entre as diferentes dietas, registrando-se valor médio de 6,6. Observou-se maior ganho de peso para os animais que receberam palhada de arroz amonizada (1,59 kg/dia) em relação à palhada mais uréia (1,25 kg/dia). O efeito da amonização, melhorando o valor nutritivo da palhada de arroz, resultou em maior consumo voluntário deste volumoso e, conseqüentemente, em maior ganho diário de peso vivo dos animais, em relação à palhada de arroz não-tratada e suplementada com uréia.
650 $aAnimal nutrition
650 $aBeef cattle
650 $aRice straw
650 $aSorghum silage
650 $aSteers
650 $aSugarcane
650 $aUrea
650 $aCana de açúcar
650 $aNovilho de corte
650 $aNutrição animal
650 $aPalha de arroz
650 $aSilagem
650 $aSorgo
650 $aUréia
653 $aAmônia anidra
653 $aAnydrous ammonia
653 $aCaña de azucar
653 $aEnsilado de sorgo
653 $aGanado de carne
653 $aNutrición animal
653 $aPaja de arroz
653 $aRaça Simental
653 $aSimental steers
653 $aTerneros
700 1 $aGARCIA, R.
700 1 $aSOUZA, A. L. de
700 1 $aPEREIRA, O. G.
700 1 $aANDRADE, C. M. S. de
700 1 $aPIRES, A. J. V.
700 1 $aBERNARDINO, F. S.
773 $tRevista Brasileira de Zootecnia, Piracicaba$gv. 33, n. 6, p. 2132-2139, 2004. Suplemento 2.
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