添加乳酸菌和纤维素酶对玉米秸秆青贮饲料品质的影响

为研究纤维素酶和乳酸菌对玉米秸秆青贮饲料品质的影响，分别设乳酸菌处理组、纤维素酶处理组、纤维素酶和乳酸菌共同处理组及对照组进行玉米秸秆青贮饲料的发酵试验。结果表明：添加纤维素酶使玉米秸秆青贮饲料中氮态氮与总氮质量比(m(VBN)／m(TN))和丁酸与总酸摩尔比分别下降28％和100％，ADF质量分数下降20％，显著提高了玉米秸秆青贮饲料的营养价值。乳酸菌的添加虽然使青贮饲料的色泽、气味和质地明显改善，但也使NDF，ADF含量明显提高，氢态氮与总氮质量比也明显上升，这说明玉米秸秆青贮饲料的品质明显下降。乳酸菌和纤维素酶的共同作用使玉米秸秆青贮饲料的干物质消失率提高8％，氨态氮与总氮质量比降低33％，丁酸质量分数降低82％，同时使NDF，ADF质量分数分别降低10％和7％，说明玉米秸秆青贮饲料的品质明显提高。

Effects of lactobacillus and cellulase on the quality of corn stover silage

Effects of lactobacillus and cellulase on quality of corn stover silage were studied by the experimentation of ferment which was designed and controled in groups of lactobacillus, cellulase, lactobacillus and cellulase. Results showed that the treatment of corn stover silage with cellulase was reduced the ratio of m(VBN)/m(TN) to 28%, ADF 20% and butyric acid-to-total acid 100% as compared with the controled silage. This silage quality turned out to be better as compared with controled silage. Lactobacillus treatment can increase concentrations of NDF, m(VBN)/m(TN) although this silage had good color, odor and texture. Treatment of corn stover silage with cellulase and lactobacillus improved DM digestibility 8%, decreased m(VBN)/m(TN) 33% and lower butyric acid-to-total acid ratios 82%, NDF content 10%, ADF content 7%. The results showed that their quality could be improved obviously.