Two trials were carried out to evaluate the feeding of high moisture sorghumsilage (HMSS) of high or low tannin contents for piglets. In the digestibilitytrial, twelve crossbred, castrated males, averaging initial body weight of 15.9±1.9kg were allotted to metabolism cages, as a completely randomized design, withfour experimental units and one piglet per cage. The total feces and urine collectionmethod was used. The values of digestible DM, digestible protein, digestiblestarch, digestible OM, digestible energy and ME of HMSS of high tannin were,respectively, of 43.94, 5.45, 46.67, 63.46%, 2,700, and 2,674 kcal/kg and ofHMSS of low tannin were of 40.72, 5.92, 44.08, 63.75%, 2,641, and 2,608 kcal/kgrespectively, as-fed basis (68.75% DM). The second trial was carried out toevaluate piglet performance and economic viability of diets with different dryyellow corn replacement levels with HMSS of high or low tannin contents. Fifty-sixcrossbred piglets (14.7±1.9 and 29.2±3.0 kg initial and finalbody weight) were allotted to four treatments as a completely randomized design,with four experimental units of two piglets. The treatments consisted of a basalcorn-soybean meal based diet and six diets of dry corn replacement with 33,66, and 100% of HMSS of high or low tannin contents based on the digestibleenergy contents of these feedstuffs. No treatment effect on piglet performancewas observed, however, there was linear increasing effect on daily feed intakefor HMSS of low tannin and linear decreasing effect for diet cost per kilogramof weight gain for HMSS of high tannin.
