Nutritional evaluation of cattle manure silage with molasses for ruminants

Abstract

Two experiments were conducted to evaluate the nutritional quality of cattle manure silage for ruminants. In experiment 1 a silage containing 50% cattle manure, 20% cane molasses (containing 0.4% urea) mixed with water in a 1:1.5 ratio, and 30% corn stover replaced 0, 50, 75 and 100% of corn stover in isonitrogenous diets (1.92% N) containing 70 or 80% corn stover (dry matter (DM) basis) in a 4×2 factorial arrangement. Forty lambs (34.5±3.2 kg body weight (BW)) were used to measure apparent digestibility and nitrogen balance in a completely randomized design with factorial arrangement (4×2) with five lambs per treatment. The cattle manure silage was also evaluated in growing Holstein heifers (212±32 kg BW) replacing 0, 25 or 37.5% of corn stover with cattle manure silage in isonitrogenous diets (2.24% N). Apparent digestibility of DM, organic matter (OM), neutral detergent fibre (NDF) and acid detergent fibre (ADF) were not affected. According to these results, digestibility is not affected by the level of cattle manure silage; however, intake was depressed at the highest levels of silage in lambs. Cattle manure silage may be considered as a potential by-product to be included in heifer's diet up to 37.5%, apparently without affecting performance. Recycling cattle manure through silage for ruminants is a viable alternative. © 1997 Elsevier Science B.V.