Effect of feeding various roughage based processed complete rations on growth performance and carcass characteristics in growing ram lambs

摘要

Threecompleterations(SS,MSandSSB)wereformulatedbyincludingjowarstover,maizestoverandanagroindustrialbyproductsweetsorghum(Sorghumbicolor(L)Moench)bagasserespectivelyalongwithconcentratein(50:50)ratioandprocessedintoexpanderextrudedpellets.Theserationswerecomparativelyevaluatedin18growingramlambsaged3months(averagebodyweight11.9kg)randomlyallottedintothreegroupsandfedindividuallyforaperiodof120days.Nodifferenceswereobservedinfeedintake.ThelambsfedonrationsSS,MSandSSBgrewwithanaveragedailygain(ADG)of70.2,77.3and81.3g,respectivelyandwerestatisticallycomparable.Thefeedconversionefficiency(kg/kggain)wasalsosimilaramonggroupsandrangedbetween9.5to10.1.Therewerenodifferenceswithregardtodressingpercentage,proportionoflean,bone,fatandedibleandinedibleorgans,wholesalecutsandorganweightsamongthelambs.ThefatproportionwashigherinramlambsfedMSrationcomparedtoSSorSSBration.Theresultsindicatethatsweetsorghumbagassecanbeutilizedat50%levelincompleterationasexpanderextrudedpelletswithoutaffectingthegrowthperformanceandcarcasscharacteristicsinramlambs.