添加菜籽壳对甜玉米秸秆青贮品质的影响

Effect of rapeseed shell addition on fermentation quality of sweet corn straw silage

试验旨在探究添加菜籽壳后对甜玉米秸秆青贮发酵品质的影响。甜玉米秸秆青贮时分别添加0(对照组)、5%、10%和20%的菜籽壳,每个混合比例分为植物乳杆菌添加组和不添加组。青贮45 d,测定甜玉米秸秆的化学成分和发酵品质。结果显示,与对照组相比,添加5%菜籽壳的甜玉米秸秆青贮的干物质含量和乳酸菌数量显著提高(P<0.05),丁酸、氨态氮含量和好氧细菌数量显著降低(P<0.05),且不受植物乳杆菌影响。各处理间甜玉米秸秆青贮的干物质、粗蛋白、中性洗涤纤维和酸性洗涤纤维含量均差异显著(P<0.05)。综合V-Score评分,所有处理评分均在80分以上,达到良好水平。研究表明,添加菜籽壳能够提高甜玉米秸秆的青贮品质,添加5%菜籽壳效果最好。

The experiment was to explore the effect of rapeseed shell addition on fermentation quality of sweet corn straw silage. Adding 0(control), 5%, 10% and 20% of rape seed shell in sweet corn straw silage, respectively, each mixture ratio was divided into plant Lactobacillus add and didn’t add group. The chemical composition and fermentation quality of sweet corn straw were determined after ensiling for 45 d. The results showed that compared with control group, adding 5%rapeseed shell could significantly increased the dry matter content and the number of lactic acid bacteria(P<0.05),significantly reduced the butyric acid content, ammonia nitrogen content and the number of aerobic bacteria(P<0.05),which was not affected by Lactobacillus plantarum. The content of dry matter, crude protein, neutral detergent fiber and acid detergent fiber were significantly different among treatments(P<0.05). Comprehensive V-Score scores, all treatment scores were above 80, reaching a good level. The experiment indicates that the addition of rapeseed husks can improve the silage quality of sweet corn stalks, the treatment with the best addition effect is 5%.