Xác định thời điểm thu hoạch và mức bổ sung rỉ mật phù hợp cho cỏ Panicum maximum cv. Hamil ủ chua
Two experiments were conducted at the Ruminant research and Development Center, Binh Duong, from March 2019 to January 2020 to study effect ofharvested at different regrowth intervals on yield and quality of Hamil grass (experiment 1: Harvested at three intervals 40, 50 and 60 days) and molasses at levels (experiment 2: Three molasses addition 0, 3, 5%) on quality of Hamil grasssilages. Results showed that, Hamil grass harvested at 50 days for fresh yield was 23.9 tons/ha, had dry mater (VCK) 22%, crude protein 11.2%; crude fiber 33.9% and water-soluble carbohydrates 3.4% are suitable for fermentation. Hamil grass silage with 0.5% salt and 3% molasses has the best quality. Grass silage golden yellow color, soft, no viscosity, no mold growth, acidic smell; pH value (4.0), the lowest ratio of ammonia nitrogen to the total nitrogen (8.1%); the highest content of lactic acid (1.45%), butyric acid was not detected. It was therefore, Hamil grass harvested at 50 days and when silages additional 0.5% salt with 3% molasses for the bestquality of silage.
