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Effects of fibre and non-fibre carbohydrate and level of intake on microbial protein yield in Sarda sheep

Boe, Filippo and Giovanetti, Valeria and Zerbini, Ercole and Bomboi, Giovanni Cristoforo and Floris, Basilio Remo (2007) Effects of fibre and non-fibre carbohydrate and level of intake on microbial protein yield in Sarda sheep. Italian Journal of Animal Science, Vol. 6 (Suppl. 1), p. 263-265. ISSN 1828-051X. Article.

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Three studies using Sarda dairy sheep in dry, mid-lactation and late-lactation were carried out. Forty ewes for each physiological stage were fed 8 complete pelleted diets, which differed from each other in NDF and NFC content and source. Based on their main ingredient, diets were denominated: corn meal (CM), wheat middlings (WM), corn flakes (CF), barley meal (BM), corn cobs (CC), beet pulp (BP), alfalfa (AA), and soybean hulls (SH). In each study, rumen microbial protein (MCP) synthesis was estimated measuring urinary purine derivatives. In dry sheep, MCP synthesis was not affected by diet, while in mid- and late-lactation sheep dietary effects were observed. In mid-lactation, the highest MCP production was found for BM and BP (171 and 166 g/d, respectively), while the lowest was observed with AA (63 g/d). In late-lactation, the highest MCP yield (146 g/d) was observed in BP, while the lowest were for SH and CM. MCP synthesis, for each diet, was higher in mid-lactation than in latelactation, which in turn were higher than in the dry period. Dry matter intake (DMI) was positively associated to MCP. The MCP synthesis was best predicted by dietary energy (NEL) or digestible organic matter intake (dOMI).

Item Type:Article
ID Code:2724
Uncontrolled Keywords:Microbial protein, purine derivatives, sheep, urea
Subjects:Area 07 - Scienze agrarie e veterinarie > VET/02 Fisiologia veterinaria
Area 07 - Scienze agrarie e veterinarie > AGR/19 Zootecnica speciale
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze zootecniche
002 Altri enti e centri di ricerca del Nord Sardegna > Istituto zootecnico e caseario per la Sardegna, Olmedo
001 Università di Sassari > 01 Dipartimenti > Biologia animale
Publisher:Avenue media on behalf of Scientific Association of Animal Production (ASPA)
Publisher Policy:Depositato per gentile concessione dell'ASPA
Additional Information:Relazione al 17. Congresso nazionale ASPA, Alghero, 29 maggio-1 giugno 2007.
Deposited On:18 Aug 2009 10:08

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