添加酶制剂对饲用苎麻与麦麸混合青贮品质的影响

为了探究酶制剂对苎麻混合青贮品质的影响,本试验在苎麻与麦麸(80%苎麻+18%麦麸+2%蔗糖)混合青贮中分别添加10 mL蒸馏水(对照组)、纤维素酶2 g/kg、纤维素酶2 g/kg+半纤维素酶0.4 g/kg、纤维素酶2 g/kg+半纤维素酶0.4 g/kg+果胶酶0.7 g/kg,30天后开包取样分析各项指标。结果表明,苎麻与麦麸混合青贮发酵品质和营养品质均较好。与对照相比,添加酶制剂显著提高了碳水化合物、干物质和粗蛋白含量(P<0.05),显著降低了中性洗涤纤维、酸性洗涤纤维、粗纤维的含量和氨态氮/总氮比值(P<0.05),但是对pH值、乳酸、乙酸和丙酸含量无显著影响(P<0.05)。本试验条件下,添加酶制剂能够有效提高苎麻混合青贮的品质,单独添加纤维素酶与复合酶制剂无显著性差异,从节约成本角度考虑,单独添加纤维素酶组为最佳选择。

Effects of Different Enzyme on Nutrition and Fermentation Quality of Ramie Silage

This study aims to explore the effects of enzyme in the mixed feeding ramie.In the experiment,10 mL distilled water(control group),cellulose 2 g/kg,cellulose 2 g/kg+hemicellulose 0.4 g/kg,cellulose 2 g/kg,hemicellulose 0.4 g/kg,pectinase 0.7 g/kg were added into mixed silage of ramie,wheat bran and sucrose(mass ratio of 80%:18%:2%).The samples were unpacked and analyzed after 30 days of ensling.The results showed that fermentation quality and nutrionnal quality of mixed silage were good.Cellulose treatment,cellulase+hemicellulose treatment and cellulase+hemicel-70 lulase+pectinase treatment significantly increased water-soluble carbohydrate concent,dry matter and rude protein(P<0.05),and significantly reduced neutral detergent fiber,acid detergent fiber,crude fiber and NH3-N/TN content of mixed silage(P<0.05).But it had no significant effect on pH,lactic acid,acetic acid and propionic acid content.Under this test condition,adding enzyme can effectively improve the quality of ramie mixed silage;while there is no significant difference between the addition of cellulase alone and the compound enzyme preparation.From the perspective of cost savings,adding the cellulase alone is the optimal choice.