Nutritive value of leaf meal of Cowpea (Vigna unguiculata (l) walp.) for growing pigs

摘要

Pigsof22-29kgbodyweight(n=24)wereusedtoassesstheeffectonconsumptionanddigestibilityofinclusionof0,15and30%(drybasis)ofleafmealofcowpea(Vignaunguiculata)(CLM).Themainelementsinthecontroldietweremaizeandsoybeanmeal.Theintaketriallasted10daysafteranadaptationperiodof10days,withtheofferlevelofthedietsetat90gDM/kgLW0.75(40gDM/kgLW).Digestibilitycoefficientsweremeasuredinthreeways:totalcollectionoffeces,useofchromiumoxide(Cr2O)asinternalmarkertodeterminetheilealdigestibilityanddigestibilitybyquot;differencequot;toestimatethecoefficientsofdigestibilityofCLMalone.IntheseteststheCLMcontributed0,15or30%ofthecrudeproteinofthediet.TheinclusionofCLMupto30%ofthedietincreasedDMintakeinacurvilinearway.nbsp;Thecoefficientsofapparentdigestibility(totalcollection)oftheDM,GE(grossenergy),nbsp;NDFandADFweresimilarinthethreetreatments.Incontrast,theapparentdigestibilityofcrudeproteinshowedadownwardtrendastheleveloftheCLMincreased.Attheleveloftheileum,thedigestibilitycoefficientsofDM,CPandGEwerelowerinthedietwith30%proteincomingfromtheCLM.TheapparentdigestibilitycoefficientsoftheCLM,determinedbythequot;differencemethodquot;were57and53%nbsp;forDMandcrudeprotein,respectively.Pigsfedthedietwith30%ofthecrudeproteinfromCLMhadgreaterdevelopmentofthelargeintestineandlessdevelopmentofthesmallintestine,comparedwithpigsfedthecontroldiet.ItisconcludedthattheCLMwaswellacceptedbythepigs,increasingconsumptionby8%withoutaffectingtheapparentdigestibilityofDMandGE.However,thedigestibilityofcrudeproteinwasdecreasedinacurvilinearwaywithincreasingCLMinthedietupto30%.