Effect of Supplementing Some Chemical Agents to Ensiled Vegetable and Fruit Market Wastes on Silage Quality and Digestibility Coefficients (in vitro and in vivo)

Abstract. Five types of silage were made from vegetable and fruitmarket wastes (VFMW) to evaluate silage quality. The different typesof silage were, VFMW (S1), VFMW + 5% ortho-phosphoric-acid(ortho-p-acid (S2), VFMW + 5% formic acid (S3), VFMW + 5% 1: 1ortho-p-acid : formic acid (S4) and VFMW + 5% sodium acetate (S5).After 21, 42 and 64 days the silos were opened and the silages characteristicswere examined. Dry matter (DM), ether extract (EE) andnitrogen free extract (NFE) contents of different silage types were increasedwhile, crude fiber (CF) content was decreased by chemicaltreatment compared with control (S1). Supplementing sodium acetateimproved in vitro dry matter and organic matter (OM) disappearancescompared with other treatments. Silage pH, NH3-N, lactic acid andbutyric acid were not different between treatments. There were no significantdifferences of silage quality after 42 and 64 days of ensiledVFMW. Nine castrated male goats of about 26.2 kg and 4 years agewere divided into three groups using 3 × 3 Latin square design with30-day periods to study the effect of treatments on nutrients coefficientdigestibility. Animals were fed on concentrate feed mixture(CFM) : VFMW silage (S1) , CFM : VFMW treated with 5% formicacid (S2) and CFM : VFMW treated with 5 % sodium acetate (S3).DM, OM, crude protein (CP), CF, EE and NFE digestibilities were increased(P 0.05) among treatments compared with control. Also, thelevels of total nitrogen, true protein and non-protein nitrogen increasedsignificantly (5%), while the levels of ammonia in theanimals’ rumen were not affected. The levels of blood sugar in-creased (5%) while that of urea and total lipids decreased in the bloodof animals fed on silage. Liver enzymes were not affected by the differenttreatments. It can be concluded that VFMW supplemented withformic acid or sodium acetate can be used for feeding ruminantswithout adverse health effects.