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Título

The effect of pattern of food supply on intake, growth, and body components in Beulah and Welsh Mountain lamb

AutorMantecón, Ángel R. ; Iason, G. R.; Milne, J. A.; Smith, A. D. M.; White, I. R.; Sim, D. A.
Fecha de publicación1989
EditorBritish Society of Animal Production
CitaciónBSAP Winter Meeting, Paper 96
Animal Production 48: 645 (1989)
ResumenThe effect of two patterns of nutrition in the post-weaning period on the performance to maturity of 78 wether lambs of each of the Beulah (B) and the Welsh Mountain (WM) breeds was studied... !".'ft tfif'"Á.irlah (B) and the Welsh Mountain (WM) breeds was studied. The two patterns of nutrition were A: a complete oii.tJ ii., (122 g ciude prolein and l0'1 M] metabolizable !;;üF kd¡ry ñ.,utt.' (bM)) otfere¿ ad tibitum.and R: the rárJ'¿i.t reá aí a level to máintain live weight (LW) for 3 r""t¡t'f"iá*iaty oa übitum feeding' Groups.of 12 lambs *"t"--J"rgft"red at the start (group I): -li€ht following rlii¡.ii."igr"up C) and ou"r a iungé of.I'W between 0'35 ,"J i'.oo oiíutur" Lw (zsl. The liñ'weighr gains-{LWG)' mature LW and voluntary intakes for B (140 g/day; 60 kg and Jle oM per kg LW pei day) were significantty-(P < 0 05) ni.?r..tr'án tho"se of ür'4 tt jsglday;50 kg and 35 g DM per itLw t., day), but there was no difference between breeds i.- f-WC relative to LW or in food conversion' LWG (A: ilt el¿uy; R: 160g/day) and LWG relative to Lw were iir"it."íir* (P < 0:00i) greater during the growth period ioiio*ing rástriction but ¡here uas no difference in voluntary intake ind thus food conversion efficiency was greater (P < 0'001) on lreatment R after restriction (A: 1l'7 kg/kg i-wct n,' 8'4kg/kg LWc). compensatory-.growth after restriction occurred equally in both breeds' I here were no interaction effects between breed and dietary treatment on úoáy.otpotition but the larger breed (B) allocated a greater proóortion of LW to .u..u., ihun the smaller WM breed (0'54 I. ó:+i' p . oOol). The proporrion of carcass^in LW declined foti"wing restrictián (I: b'5i; C: 0'45; P'0 001)' But was ;ilil;;;"".i;;;rowth periods A and R (0'4e v' 0'47)' A pellgg áii."¿ restr"ic"tion in ihe autumn increased subsequent LWG ,"J f*¿ efficiency but not the proportion of carcass in the LW. 97. ErpEcrs
DescripciónContributed to: 98th Meeting of the British Society of Animal Producion (Scarborough, UK, Mar 13-15, 1989).
Versión del editorhttp://www.bsas.org.uk/Meetings_&_Workshops/Past_Meetings/
URIhttp://hdl.handle.net/10261/17128
ISSN0003-3561
Aparece en las colecciones: (IGM) Comunicaciones congresos
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