NUTRITIONAL QUALITY OF WILTED NAPIER GRASS (Pennisetum purpureum Schum.) ENSILED WITH OR WITHOUT MOLASSES
1992
H.Yokota | J.H.Kim Department of Grassland Science, The Farm, School of Agriculture Nagoya University, Togo, Aichi 470-01, Japan
To investigate the effects of molasses addition at ensiling on nutritional quality of wilted napier grass, chemical quality and nutrient composition of the silages, digestibility and nitrogen retention at feeding trials were analysed using 4 goats in a cross over disign. The results are as follows: 1. Molasses addition at ensiling decreased pH value (3.99) and ammonia nitrogen, and increased lactic acid content by 285% compared to non-additive silage (83.5 g/kg dry matter). 2. There were no differences in digestibilities of dry matter, crude protein, neutral detergent fiber, acid detergent fiber, hemicellulose and cellulose between the silage ensiled with molasses (MS silage) and the silage ensiled without molasses (WS silage). Urinary nitrogen excretion, however, significantly (p0.05) decreased in goats fed the MS silage, and nitrogen retention was positive in goats fed the MS silages, but negative in goats fed the WS silage. 3. Acetic concentration in ruminal fluids in goats fed the MS silage was lower and propionic and butyric acid concentrations were higher than those in goats fed the WS silage. As water soluble carbohydrate content was higher in the MS silage than in the WS silage, a part of added molasses was still remained in the silage at the feeding trials and could be utilised for energy sources by the goats. Nitrogen may be also effectively utilised in goats fed the MS silage, becaues the silage were inhibited in proteolysis during ensiling.
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