Cassava root silage for crossbred pigs under village conditions in Central Vietnam

摘要

Anon-farmtrialinBinhDienandXuanLocvillagesinCentralVietnamcomparedensilingofcassavaroots(ECR)(chippedbyhandorgroundbymachine)withsun-driedcassavarootmeal(CRM)withsupplementsofquot;Aquot;molassesatlevelsfromzeroto20%.TheHCNcontentofthegroundwholecassavarootafterensilingfor60dayswasreducedfrom109ppmto64ppm,whileensilingthechippedrootreducedHCNfrom111to71ppm.Theoptimumlevelsofquot;Aquot;molassesreplacingcassavaroot(ensiledordried)inpigdietswithproteinsupplykeptconstantat200g/daywasintherangeof15to20%forliveweightgainandeconomicpurposes.Meanliveweightgainswere465g/pig/dayforthecassavarootmealdietand453g/pig/dayfortheensiledcassavarootdieteachwith20%ofquot;Aquot;molasses.Feedcosts/kggainforthe20%molassesdietwithdriedandensiledcassavarootwere11%and27%lessthanforcorrespondingdietswithoutmolasses.