Nutritional diversity of agricultural and agro-industrial by-products for ruminant feeding

Fifty-seven by-products were collected from regions throughout Brazil. Chemical composition, in vitro neutral detergent fiber digestibility (IVNDFD), and total digestible nutrients (TDN) were determined with the objective of grouping by-products with similar nutritional characteristics. The by-products belonging to group one (G1) presented the highest content of neutral detergent fiber exclusive of ash and nitrogenous compounds [aNDFom(n)] and lowest energy content, with 42.5% and 38.8% of IVNDFD and TDN, respectively. A new cluster analysis was carried in order to better characterize G2 by-products, six subgroups (SGs) were established (SG1 to SG6). SG1 by-products had the highest and the lowest values for lignin and TDN, respectively. SG2 by-products had the highest aNDFom(n) value, with TDN and IVNDFD values greater than 600 and 700g/kg, respectively, and crude protein (CP) value below 200g/kg in dry matter (DM). Among all the subgroups, SG3 had the highest TDN (772g/kg) and IVNDFD (934g/kg) values and the lowest lignin (23g/kg in DM) value. The ether extract was what most influenced the hierarchical establishment of residual grouping in SG4. SG5 by-products had the highest concentration of non-fibrous carbohydrate. Different from the other subgroups, SG6 by-products had the highest value of available CP.

Bibliographic Details

Main Authors:	Azevêdo,J.A.G., Valadares Filho,S.C., Pina,D.S., Detmann,E., Pereira,L.G.R., Valadares,R.F.D., Fernandes,H.J., Costa e Silva,L.F., Benedeti,P.B.
Format:	Digital revista
Language:	English
Published:	Universidade Federal de Minas Gerais, Escola de Veterinária 2012
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000500024
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