摘要
试验旨在探讨不同青贮添加剂对谷草青贮的营养价值、发酵品质及康奈尔净碳水化合物及净蛋白质体系(CNCPS)组分的影响。以全株谷草为原料进行青贮,设置4个处理组,每组3个重复。对照组不添加任何添加剂,菌制剂组添加0.1%的复合菌制剂,酶制剂组添加0.2%的纤维素酶,菌酶复合组添加0.1%复合菌制剂+0.2%纤维素酶。青贮60 d后,分析各组青贮饲料的营养成分、发酵指标及CNCPS组分。结果显示,对照组和酶制剂组谷草青贮饲料的感官评分为良好,菌制剂组和菌酶复合组谷草青贮感官评分为优等,且菌酶复合组评分最高,为18分。与对照组相比,菌制剂组和菌酶复合组谷草青贮的粗蛋白含量显著增加(P<0.05),分别增加13.00%和16.96%;菌酶复合组酸性洗涤木质素含量显著降低了24.01%(P<0.05);菌制剂组、酶制剂组和菌酶复合组谷草青贮的中性洗涤纤维含量显著降低(P<0.05),分别降低了6.14%、9.33%和12.56%。与对照组相比,菌制剂组、酶制剂组和菌酶复合组谷草青贮的氨态氮/总氮比例显著降低(P<0.05),pH值显著降低(P<0.05),乳酸含量显著增加(P<0.05);菌酶复合组丙酸含量显著增加(P<0.05)。与对照组相比,酶制剂组和菌酶复合组谷草青贮的不可降解碳水化合物(CC)含量显著降低(P<0.05),菌酶复合组谷草青贮的中速降解碳水化合物(CB_(1))含量显著降低(P<0.05);菌制剂组、酶制剂组和菌酶复合组谷草青贮的非蛋白氮(PA)含量显著降低(P<0.05),中速降解蛋白(PB_(2))含量显著增加(P<0.05);菌酶复合组快速降解蛋白(PB_(1))含量显著增加(P<0.05)。研究表明,添加菌制剂和酶制剂可以改善谷草青贮的感官品质、营养价值、发酵品质及CNCPS组分,且菌酶复合组的效果较好。
This experiment aimed to investigate the effects of different silage additives on the nutritional value,fermentation quality,and CNCPS components of grain and grass silage.Whole-plant grain and grass silage was used as the raw material for silage,with four treatment groups and three replicates per group.The control group receives no additives,the microbial inoculant group was treated with 0.1%compound microbial inoculant,the enzyme preparation group was treated with 0.2%cellulase,and the microbial-enzyme combination group was treated with 0.1%compound microbial inoculant+0.2%cellulase.After 60 days of ensiling,the nutritional composition,fermentation parameters,and CNCPS components of the silage were analyzed.The results showed that the sensory evaluation scores of grain and grass silage in the control and enzyme preparation groups were rated as good,while those in the microbial inoculant and microbial-enzyme combination groups achieved excellent ratings,with the combination group scoring the highest(18 points).Compared to the control,the crude protein content significantly increased by 13.00%and 16.96%in the microbial inoculant and microbial-enzyme combination groups,respectively(P<0.05).The acid detergent lignin content in the combination group decreased by 24.01%(P<0.05),and the neutral detergent fiber content declined by 6.14%,9.33%,and 12.56%in the microbial inoculant,enzyme preparation,and microbial-enzyme combination groups,respectively(P<0.05).Compared with the control group,the ratios of ammonia nitrogen to total nitrogen in the grain and grass of the microbial inoculant group,the enzyme preparation group and the microbial-enzyme combination group were significantly decreased(P<0.05),the pH value was significantly decreased(P<0.05),and the lactic acid content was significantly increased(P<0.05),the propionic acid content in the microbial-enzyme combination group was significantly increased(P<0.05).Compared with the control group,the contents of non-degradable carbohydrates(CC)in the grain and grass silage of the enzyme preparation group and the microbial-enzyme combination group were significantly decreased(P<0.05),and the content of medium-speed degradable carbohydrates(CB1)in the grain and grass silage of the microbial-enzyme combination group was significantly decreased(P<0.05),the contents of non-protein nitrogen(PA)and medium-speed degradable protein(PB_(2))in the grain and grass silage of the microbial inoculant group,the enzyme preparation group and the microbial-enzyme combination group were significantly decreased(P<0.05),and the content of rapid-degradable protein(PB_(1))in the microbial-enzyme combination group was significantly increased(P<0.05).The study shows that adding bacterial preparations and enzyme preparations can improve the sensory quality,nutritional value,fermentation quality and CNCPS components of glutaraldehyde silage,and the effect of the bacterial-enzyme composite group is better.
作者
魏杰
丁丹丹
张广平
WEI Jie;DING Dandan;ZHANG Guangping
出处
《饲料研究》
北大核心
2025年第11期123-127,共5页
Feed Research
