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South African Journal of Animal Science

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Evaluation of faba beans (Vicia faba cv. Fiord) and sweet lupins (Lupizus albus cv. Kiev) as protein sources for growing pigs

T.S Brand, R.C. Olckers, J.P. van der Merwe

Abstract


Three diets were formulated to contain16 % acrude protein( CP),1 2.8M J/kg digestiblee nergy( DE) and0 .9% lysineo n an air-dry basis.T he diets eitherc ontained8 .37of -ishmeal,207foa bab eansp lus 7.9%,s oybeano ilcakem eal (SBOK) or 20o/o low alkaloidl upinsp lus 8.8%S BOK as proteins ourcesT. he lattert wo dietsw erec omparedin a metabolisma nd nitrogen (N) balancet rial usinga completelyr andomizedd esigna nds ix pigs/treatmenAt.l l threed ietsw eree valuatedin a growth trial using l0 pigs( flveb oarsa ndf lve gilts)o vert heg rowthi nterval3 0-90 kg. The experimentadle signw asa 3 (diets)x 2 (sex)f 'actorialC. arcassc haracteristicwse red etermineda t thee ndo f theg rowtht rial.P igsi n the metabolisrna ndN balance trial consurned5 % less( P < 0.01)o 1'thel upind ietc omparedto the fabab eand iet (l 370 vs. | 440 gld).N o significandt ift'erenceisn the digestiblee nergy( DE) contenta nd in apparenNt retentionb etweent he two dietso ccurred.I n the growth trial loweri ntakel evels( P < 0.01)w ereo ncea gaino bservedin pigso n thel upin diet( 2 489g id) cornparedto the fabab ean (2 631g id) andf lshmeadl iets( 2 668g id).P igso n thel upind ietg rew( P < 0.01)s lowert hanp igso n theo thert wo diets( 768 g/d vs. 857 g/d and 869 g/d for the fabab eana ndf lshmeald ietsr espectively)T. he feedc onversionr atio of pigs on the lupin diet (3.27k g/kg gain)t endedt o be poorerthanf orthoseo n the fababean( 3.03k g/kg gain)a ndf ishmeald iets( 3.12kgkg gain).N o signilicantd ifferencesw ereo bservedin dressingp ercentag(em eanv alueo f 78Vo)e, yem usclea rea( meanv alue of 4l .3 cmll or Pr-back-af t thickness(m eanv alueo f 16 mm) ol pigso n thed iff-erendti ets.B oth fabab eana ndl ow alkaloid lupinsc an be useda t levelso f up to 207oi n dietso f growingp igs,a lthoughlo werp roductionfi guresm ay be expected on lupin diets.

Drie garsgebaseerddeiC tem et 8.3% vismeel,207rf,a babonep lus7 .9Vos ojaboon-oliekoekme(eSlB OK) en 20% lae-alkaloied- lupieneplus8.S%SBOKasproteienbronneissaamognetsotnegl eveer167oruproteie1n2e.,8 MJ-ver teerbareenergie cn0.9o/ r , l isieonp 'n lLrgdrobda sist e bevatD. ie lababoone-n lupicrndieitsc m etm ekaarv ergelykin 'n metabol isnteen st ikstol'( N)-balansstr.rndticet sesv arke/diectA. l die di€te( n = l0/dieet)i s in'n groeistudiem et l0 varke( 30-90 kg) vergelyk. Karkaseienskappise a and ie eindev and ie periodeb epaalM. et die metabolisniestudhieet v arkeo p die lupien dieet( I 370g /d) laer( P < 0.01) innarnesg ehada s varkeo p die fababoond ieet( 14'10g /d).I n die groeistudieh et varkeo p die lupiendieet (2489 g/d) erveneenlsa cr( P< 0.01)i nnamesa so p die fababoon(2 637 g/d)o f vismeeldiee(t2 668 g/d)g ehad.V arkeo p die lupiendiee(t7 68 g/d; het I I c/a( P 3 0.01)s tadigegr egroeia s varkeo p die fababoone- n vismeeldiete(8 57 g/d en 869 g/d rcspektieu,elikD).i e voeromsettingsdoeltreffendh(neiied b etekenisvolw) as onderskeideli3k. 27k g/kg toename( lupiene), 3.03 kg/kg toename( fababone)e n 3.12 kglkg toename( vismeel).G een betekenisvolleve rskillei n uitslagpersentasie (gemicldelc7l8 Va)o, ogspieroppervlak(tgee middeld4 1.3c mr)of P.-rugvetdikt(eg emiddeldl6 mm) tussend ietei s waargeneemn ie.D it blyk dat sowelf ababonea sl ae-alkaloied-lupietneee nv lakkev ant ot 20% in dietev ir groeiendev arkeg ebruik kan word, alhoervel 'n lacrp roduksiepersentabsyie v arkeo p lupiengevoerddeie tev erwagk an word.

Keywords: Faba bean, lupin, pigs, protein source.




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