SciELO - Scientific Electronic Library Online

 
vol.13 issue3Lactating cows fed with silage of sugar cane with and without additive bacterial: intake, digestibility, milk production and compositionSilages and hays in association with spineless cactus for lactating cows. Intake, digestibility and performance author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Revista Brasileira de Saúde e Produção Animal

On-line version ISSN 1519-9940

Abstract

GOMES, Silas Prímola et al. Forage particle size and the number of feedings over energy and protein metabolism in sheep. Rev. bras. saúde prod. anim. [online]. 2012, vol.13, n.3, pp.732-744. ISSN 1519-9940.  https://doi.org/10.1590/S1519-99402012000300013.

This study aimed to evaluate the effect of different forage particle sizes and the feeding frequency on the animals metabolism. Eight lambs with 52.5kg live weight were distributed in a randomized block design according the 2x4 factorial, corresponding to two feeding frequencies and four particle sizes (2mm; 5mm; 10mm and 25mm). The forage used was the Tifton-85 hay (Cynodon spp.) and commercial concentrate, adjusting the forage: concentrate ratio to 25:75%. The respirometry experiment was conducted in an open circuit respiration chamber for small ruminants. The concentrations of oxygen, carbon dioxide and methane were determined. Nitrogen content was determined in urine. With these parameters was determined heat production (PC). The nitrogen retained represented 36.0% of Nitrogen (N) intake (g/day) and 46.8% of N absorbed (g/day). The CH4 average production was 1.45L/UTM/day. The PC was approximately 40.0% of crude energy intake. The metabolizable energy was 73.2% of crude energy intake and the average value of net energy was 1807.35kcal/day. There was no effect of particle size and feeding frequency on the nitrogen balance and energy metabolism.

Keywords : calorimetry; net energy; physically effective fiber; respirometry.

        · abstract in Portuguese     · text in Portuguese     · Portuguese ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License