水分含量对杂交臂形草青贮品质的影响OA北大核心CSTPCD

The purpose of this experiment was to investigate the effect of moisture content of different raw materials on the silage quality of Brachiaria hybrid.Morat Ⅱ Brachiaria hybrid was used as silage material.The moisture content of Morat Ⅱ Brachiaria hybrid was 35.0％,45.0％,55.0％,65.0％,and 70.4％(CK).The silage was stored at room temperature for 60 days.After opening,samples were taken to test its silage quality and nutritional quality.The results showed that the pH value,sensory quality,crude fat,crude protein,crude ash and soluble carbohydrate contents of silage all increased at first and then decreased with the decrease of moisture content of silage raw materials,while the content of neutral detergent fiber increased and the content of acid detergent fiber decreased gradually.Compared with CK,the ratio of NH3-N/TN,propionic acid,and butyric acid contents of silage in each treatment group decreased significantly(P＜0.05),while lactic acid,acetic acid,and crude protein contents increased significantly(P＜0.05).When the moisture content of raw materials is 45.0％～55.0％,the pH value of silage was 4.08～4.10,and the sensory quality was the best,which was a first-class excellent silage.The study indicates that the moisture content of raw materials has a certain influence on the content of conventional nutrients in silage,and the contentrations of crude protein and crude fat have great influence.It is suggeste that the moisture content of raw materials of Morat Ⅱ Brachiaria hybrid silage should be controlled between 45％.0 and 55.0％.