不同剂量木醋液对苜蓿青贮品质的影响

Effects of Different Dosages of Wood Vinegar on the Nutrition and Fermentation Quality of Alfalfa Silage

试验以木醋液为青贮添加剂,设计4个剂量梯度(3、6、9和12mL/kg),以蒸馏水替代木醋液作为对照,探讨其对苜蓿青贮品质的影响。结果表明:(1)木醋液各剂量处理对青贮苜蓿粗蛋白、中性洗涤纤维、酸性洗涤纤维、木质素和淀粉含量无显著影响(P>0.05),但12mL/kg剂量处理显著降低了粗脂肪含量(P<0.05);(2)木醋液各剂量处理显著降低了青贮苜蓿酸性洗涤不溶蛋白和中性洗涤不溶蛋白的含量(P<0.05),说明木醋液可在一定程度上提高青贮苜蓿蛋白的利用率;(3)木醋液各剂量处理能显著降低青贮pH值(P<0.05),显著提高乳酸含量(P<0.05),说明木醋液在一定程度上提高了青贮苜蓿发酵品质;(4)隶属函数综合评价显示,木醋液3mL/kg、6mL/kg和9mL/kg可显著提高青贮苜蓿品质(P<0.05),其中以3mL/kg最佳。

The experiment was conducted to investigate the influences of different dosage of wood vinegar on the nutrition and fermentation quality of alfalfa silage.The experiment included four dosage gradients(3 ml/kg,6 ml/kg,9 ml/kg and 12 ml/kg)of wood vinegar,and the control replaced with the same amount of distilled water.The results showed that:1)Each dose of wood vinegar had no significant effect on neutral detergent fiber,acid detergent fiber,lignin and starch content of Alfalfa silage(P>0.05),but the dose of 12ml/kg significantly reduced the crude fat content of Alfalfa silage(P<0.05);2)Each dose of wood vinegar significantly reduced the insoluble protein of neutral detergent fiber and acid detergent fiber(P<0.05),indicating that wood vinegar could improve the protein utilization of Alfalfa silage(P<0.05);3)Each dose of wood vinegar could significantly reduce the pH value of Alfalfa silage(P<0.05),and significantly increased the lactic acid content(P<0.05),indicating that wood vinegar could improve the fermentation quality of Alfalfa silage;4)The subordinate function showed that the quality of Alfalfa silage could be significantly improved by 3 mL/kg,6 mL/kg and 9 mL/kg dosage of wood vinegar(P<0.05),and the 3 mL/kg dosage was the best one.