Effect of different protein levels derived from mixtures of water spinach and fresh sweet potato vines in basal diets of broken rice or cassava root meal and rice bran for growing pigs

摘要

Thirtytwocrossbredpigs(meaninitialweight11.33kg)werehousedinindividualpensandallocatedto8treatmentsaccordingtoa2*4factorialarrangement.Thefactorsweretwosourcesofenergy:brokenricecomparedwithcassavarootmealmixedwithricebran;andfourlevelsofcrudeprotein(10,12,14and16%indrymatter(DM)).Thesourceofsupplementarycrudeproteinwasamixture(50:50asDM)ofwaterspinachwithsweetpotatovines.Thedurationoftheexperimentwas150days,fromJuly02toDecember02,2006.nbsp;Therewerecurvilinearrelationshipsbetweendietarycrudeproteinconcentrationandliveweightgainandfeedconversionwiththeoptimumpointat14%crudeproteininthedietDM.Growthrateswerethesamebutfeedconversionwasbetterwhentheenergysourcewasbrokenriceratherthancassavarootmealandricebean.Growthratesandfeedconversionimprovedwithtimeontheexperiment.nbsp;