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| Velásquez,Alejandro; Rivero,Jordana; Marnet,Pierre-Guy. |
| The object of the present review is to analyze the methodologies that are commonly used to estimate protein degradability in the rumen, focusing on their attributes and limitations to offer suggestions for improving their use. This information is essential for selecting food types when formulating feed diets. A reliable prediction of the digestibility of ruminal proteins is basic information necessary for optimizing the use of nitrogenous sources because digestibility can translate, on the one hand, into higher yields of milk, milk protein, meat or wool and, on the other hand, into lower excretion of nitrogenous compounds into the environment; it also has an impact on animal health and welfare. Traditionally, the digestibility of feed proteins in the rumen... |
| Tipo: Journal article |
Palavras-chave: Ruminal protein degradability; Methodologies; Limitations. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202016000200001 |
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| Velásquez,Alejandro; Marnet,Pierre-Guy; Arias,Rodrigo. |
| In a first experiment, the effect of in vitro incubation with Aspergillus niger (An) on the chemical composition of different fibrous substrates was studied. In a second experiment, the effect of incubation time (0,72 and 144 h) on in vitro digestion with An of dry matter (IVDMD), neutral detergent fiber (DVNDF) and acid detergent fiber (DVADF) was evaluated for different substrates. Wheat straw, WS; barley straw, BS; oat hulls, OH; dehydrated alfalfa, DA; and dehydrated ryegrass, DB substrates were evaluated. In both experiments, incubations were performed in 250 mL Erlenmeyer flasks; 2 g of substrate was added to a culture medium (pH = 6), and incubated at 28 °C with constant ventilation. The An dose consisted of 3 mL of a solution of 5.3 χ... |
| Tipo: Journal article |
Palavras-chave: Aspergillus niger; Fibrous substrates; In vitro digestion; Nutritional quality. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000100005 |
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