Effect of replacing concentrate by molasses urea blocks (mub) and Acacia mangium leaves for crossbred milking cows fed grasses of low nutritive value

[摘要] EighteencrossbredHolsteinxSindhidairycowsinearlylactationwerefedabasaldietofgrassesoflownutritivevalueadlibitumand2kg/dofcottonseedcake.Thefollowingsupplementswerecompared:C:560gconcentrate/kgmilk(Control).MUB:Molasses-ureablock(10%urea)adlibitumand200gofricebran/kgmilk.AmMUB:Acaciamangiumfreshleaves(1.5kg/100kgLWt),MUBadlibitumand100gricebran/kgmilk.nbsp;Milkyieldduringthefirst26dayswhencowswerefedthecontroldietwasusedascovarianttocorrecttheexperimentalyieldmeasuredduringthenext30days.Therewerenosignificantdifferences(Pgt;0.05)betweenaverage(corrected)milkyieldsforthethreetreatments(9.9,9.8,9.0kg/dforC,MUBandAmMUB,respectively).

[学科分类] 农业科学（综合）