Abstract
The aim of this study was to evaluate the effect of wheat bran in increasing amounts on the total apparent dry matter digestibility (DM), the fiber (NDF, ADF) and the protein (CP) in goat diets. Eight Criollo x Nubian goats were used in a 4x4 Latin square experimental design. Four diets were provided: alfalfa hay (D0); alfalfa hay + wheat bran (WB) (0.5% of BW/day) (D1), alfalfa hay + WB (1% of BW/day) (D2) and alfalfa hay + WB (1.5% of BW/day) (D3). All the treatments consisted of alfalfa hay delivered ad libitum. In vivo total apparent digestibility of the DM intake and its fractions was calculated as a result of the difference between the ingested and excreted amounts in relation to the intake. Forage intake and the relation forage/concentrate decreased linearly (p 0.05) with the WB increase in the different treatments. We can conclude that the addition of WB in Criollo x Nubian goats improved the total apparent digestibility of the ingested DM by replacing hay for concentrate, without altering NDF, ADF and CP fractions.
Highlights
Success in ruminant production is explained, to a significant extent, by the animal’s capacity to digest fibrous vegetal materials
The objective of this study was to evaluate the effect of increasing amounts of wheat bran on the total apparent digestibility of dry matter, neutral detergent fiber (NDF), ADF and CP, in goat diets
The amount of wheat bran was delivered in an increasing manner, starting from 70 g per animal per day, until reaching each treatment’s proportions at the beginning of the second week of the adaptation period
Summary
Success in ruminant production is explained, to a significant extent, by the animal’s capacity to digest fibrous vegetal materials. Rumen and host animal’s health (Russell & Rychlik, 2001). To know the forage digestibility is not useful unless knowing the amount animals will ingest (Ørskov & Ryle, 1990). The combination of both in vivo apparent digestibility of dry matter and dry matter intake results in the digestible dry matter intake. This value provides a more effective means for the assessment of feed potential than either of them separately (Coleman et al, 1999)
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