酶制剂对绿狐尾藻、稻秸粉与玉米粉混合青贮品质的影响

Effects of enzyme preparation on mixed silage from Myriophyllum elatinoides,corn flour,and rice straw powder

将新鲜绿狐尾藻(Myriophyllum elatinoides)、稻(Oryza sativa)秸粉和玉米(Zea mays)粉按质量比70%:15%:15%混合作为青贮原料,分别添加纤维素酶、木聚糖酶和复合纤维素酶3组添加剂,以未添加为对照,研究不同酶制剂对绿狐尾藻混合青贮发酵品质、营养品质及有氧稳定性的影响。结果表明:与未添加对照相比,添加酶制剂可显著降低绿狐尾藻混合青贮的pH和氨态氮/总氮(P<0.05),显著提高可溶性碳水化合物含量(P<0.05);复合纤维素酶处理组感官评分和V-Score评分、pH、氨态氮/总氮、乳酸等发酵指标均最优;木聚糖酶处理组有氧稳定性最优;纤维素酶处理组的粗蛋白质含量最高,中性洗涤纤维含量最低,且V-Score评分、pH、氨态氮/总氮等发酵相关指标属于优质青贮发酵范畴。综合发酵品质、营养品质以及有氧稳定性指标,纤维素酶处理组效果最佳。

The mixed silage materials of Myriophyllum elatinoides,corn flour,and rice straw were 70%:15%:15%for fresh ingredients.Cellulase,xylanase,or composite cellulase was added to the mixed silage but not in the control group.The effects of different enzyme preparations on fermentation quality,nutritional quality,and aerobic stability of mixed silage from M.elatinoides were studied.Compared with the control,the addition of enzyme preparation significantly reduced pH,ammonia nitrogen/total nitrogen(P<0.05),and significantly increased soluble carbohydrate content(P<0.05).The sensory score,V-score,pH,ammonia nitrogen/total nitrogen,and lactic acid content of the compound cellulase treatment group were the best.The xylanase treatment group had the best aerobic stability.The cellulase treatment group had the highest crude protein,neutral detergent fiber content,V-score,pH value,and ammonia nitrogen/total nitrogen;these fermentation-related indicators belong to the category of high-quality silage fermentation.Comprehensive fermentation quality,nutritional quality,and aerobic stability of the cellulase treatment group had the best effect.