Consulta: subjectFacets:"Metabolizable protein"
Registros recuperados: 4
Data/hora: 13/06/2024 02:17:39

Predicting post-absorptive protein and amino acid metabolism
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Hanigan,Mark D.; White,Robin R.; Apelo,Sebastian I. Arriola; Aguilar,Michelle; Estes,Kari A.; Myers,Adelyn.
ABSTRACT Sustainable production of adequate quantities of food to support a growing human population is a worldwide goal. Under current feeding conditions in the United States, dairy cattle convert dietary nitrogen to milk nitrogen with 25% efficiency. The remaining 75% is excreted, which contributes to air and water quality problems and reduces economic performance of the industry. Efficiency could be improved to 29% if protein was given to just meet current NRC requirements. Additional improvements may be achievable, but only with improved knowledge of amino acid (AA) requirements. The current metabolizable protein requirement model overestimates true requirements due to lack of knowledge of AA supply and requirements and to intrinsic limitations in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino acids; Lactation; Metabolizable protein; Milk urea nitrogen; Nutrient requirements.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100614

Chemical composition and ruminal degradation kinetics of crude protein and amino acids, and intestinal digestibility of amino acids from tropical forages
Provedor de dados: Revista Brasileira de Zootecnia
Autores: Miranda,Lidia Ferreira; Rodriguez,Norberto Mario; Pereira,Elzânia Sales; Queiroz,Augusto César de; Sainz,Roberto Daniel; Pimentel,Patrícia Guimarães; Gontijo Neto,Miguel Marques.
The objective of this research was to determine the chemical composition and ruminal degradation of the crude protein (CP), total and individual amino acids of leaves from tropical forages: perennial soybean (Neonotonia wightii), cassava (Manihot esculenta), leucaena (Leucaena leucocephala) and ramie (Boehmeria nivea), and to estimate the intestinal digestibility of the rumen undegradable protein (RUDP) and individual amino acids of leaves from the tropical forages above cited, but including pigeon pea (Cajanus cajan). Three nonlactating Holstein cows were used to determine the in situ ruminal degradability of protein and amino acids from leaves (6, 18 and 48 hours of ruminal incubation). For determination of the intestinal digestibility of RUDP, the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Intestinal digestion; In vitro; Metabolizable protein; Total aminoacids digestibility.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000300035

Diet crude protein content and sources for lactating dairy cattle
Provedor de dados: Scientia Agricola
Autores: Imaizumi,Hugo; Santos,Flávio Augusto Portela; Bittar,Carla Maris Machado; Correia,Paulo Sérgio; Martinez,Júnio César.
Feeding extra protein as an attempt to increase amino acid flux to the intestine may increase lactational performance of dairy cattle. The objective of this study was to compare lactating dairy cow diets containing 16% crude protein (CP), adequate in rumen degradable protein (RDP) and metabolizable protein (MP) according to NRC (2001), with diets containing 17.5% CP. Forty-two Holstein cows (27 primiparous and 15 multiparous, with 172 days in milk) were used in a 3 ´ 3 Latin Square design with 14 replicates. Control diet consisted of 16% CP, adequate in RDP and MP . Crude protein content of diets was increased to 17.5% by feeding extra soybean meal and cottonseed meal (SBCS17.5) to increase diet MP, or extra urea (U-17.5) to increase diet RDP. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cottonseed meal; Metabolizable protein; Protein sources; Rumen degradable protein; Soybean meal.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000100003

Composição corporal, exigências em proteína e energia para ganho de peso de caprinos em pastejo - DOI: 10.4025/actascianimsci.v30i4.4798
Provedor de dados: Acta Scientiarum: Animal Sciences
Autores: Nóbrega, Giovanna Henriques da; CSTR/UFCG; Silva, Aderbal Marcos de Azevêdo; CSTR/UFCG; Pereira Filho, José Morais; CSTR/UFCG; Azevedo, Solange Absalão; CSTR/UFCG; Carvalho Júnior, Aloisio Monteiro de; CSTR/UFCG; Alcalde, Claudete Regina; UEM.
Objetivou-se com este trabalho estimar a composição corporal e as exigências nutricionais em proteína e energia para ganho de peso de cabritos ½ Boer ½ SRD, na fase de crescimento, em pastejo na região semiárida. O experimento foi desenvolvido na fazenda ‘Nupeárido’, no município de Patos, Paraíba. Foram utilizados 24 cabritos com peso corporal médio inicial de 15 kg, em pastejo, distribuídos em quatro tratamentos com níveis crescentes de suplementação concentrada (0; 0,5; 1,0 e 1,5% do peso corporal). Os animais, mantidos em sistema de semiconfinamento, receberam suplementação alimentar, em baias individuais, ao serem recolhidos diariamente. Quando um dos animais de cada grupo atingia 30 kg de peso corporal, todos os demais animais do grupo eram abatidos...
Palavras-chave: 5.04.03.00-1 Nutrição e Alimentação Animal Capra hircus; Energia metabolizável; Exigência líquida; Proteína metabolizável; Semiárido. Exigências Nutricionais dos Animais Capra hircus; Metabolizable energy; Net requirement; Metabolizable protein; Semi-arid.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/4798