Value of grass silage, dried pelleted grass and malt distillers' grains as supplements to barley straw
[摘要] Anexperimentwascarriedouttodetermineintakeanddigestibilityincattleoflongbarleystrawsupplementedwithgrasssilage(S),driedpelletedgrass(G),maltdistillers'grains(D)orbarleyandsoyabeanmeal(B).Thesupplementswereofferedattwolevels,low(L)andhigh(H).Thelowlevelwas2.5kgandhighlevel3.25kgDMperanimalperday.EightBritishFriesiansteersinitiallyweighing378kgliveweightwereusedinanincompleteblockdesignderivedfromhalfofan8x8latinsquare.AllsupplementsdepressedstrawintakeandtotaldietDMintakewhencomparedwiththebasaldietinwhichbarleyandsoyabeanmealwereused.Similareffectswerenotedondigestibilityexceptforthesilagesupplementwhichdidnoteffectdigestibility.Themostnoticeabledepressingeffectwaswiththemaltdistiller'ssolubles.Itissuggestedthatthebarley/soyabeanwasmoreeffectivethantheothersupplementsinmaintainingahighprotein:energyratiointhemixtureofnutrientspresentedformetabolism,probablybecausethesoyabeanmealsuppliedmorebypassproteinthantheothersupplements.Thefactthatthedistiller'sgrainshadthemostnegativeeffectbothonintakeanddigestibility(especiallyofthefibre)isprobablybecauseofitshighlipidcontentandtheknownbacteriostaticeffectoffatoncellulolyticmicroorganisms.
[发布日期] [发布机构]
[效力级别] [学科分类] 农业科学（综合）
[关键词] [时效性]
