添加乳酸菌和纤维素酶对黄花苜蓿青贮品质的影响

发布时间：2018-08-30 17:45

【摘要】：选用半人工草地黄花苜蓿为青贮原料,分别添加0.02g/kg乳酸菌剂、0.15g/kg纤维素酶,以无添加为对照组,青贮60d后进行感官评定并测定发酵品质、营养品质。结果显示:添加乳酸菌剂和纤维素酶添加剂青贮苜蓿的pH值(4.18、4.30)、NDF含量(43.89%、40.78%)、ADF含量(28.65%、25.46%)、AN/TN(3.80%、4.70%)均显著降低;其中添加乳酸菌剂青贮苜蓿乳酸含量为2.90%,显著高于对照组的0.57%(P0.05);而添加纤维素酶的青贮苜蓿乳酸含量为1.11%,高于对照组,但差异不显著。其中添加乳酸菌的青贮苜蓿未检测出丁酸,显著低于对照组的0.57%(P0.05);而添加纤维素酶的青贮苜蓿丁酸含量为0.21%,低于对照组,但差异不显著。综合考虑:黄花苜蓿不宜单独青贮,添加乳酸菌显著改善黄花苜蓿青贮品质,添加纤维素酶对黄花苜蓿青贮品质稍有改善,但有些指标不达标,不适宜添加。
[Abstract]:Alfalfa in semi-artificial grassland was used as silage material and 0.15g / kg cellulase was added with 0.02g/kg lactobacillus agent respectively. After 60 days of silage, sensory evaluation and nutritional quality were carried out. The results showed that the pH value of silage with lactic acid bacteria and cellulase additive (4.18 ~ 4.30) (43.89 ~ 40.78%), (28.65 ~ 25.46%) and (3.80%) TN (4.70%) were significantly decreased. The lactic acid content of alfalfa with lactic acid bacteria was 2.90, which was significantly higher than that of control group (0.57%, P0.05), while the content of lactic acid in silage with cellulase was 1.11, which was higher than that in control group, but the difference was not significant. Butyric acid was not detected in silage with lactic acid bacteria, which was significantly lower than that in control group (P 0.05), but the content of clover butyric acid in silage with cellulase was 0.21, which was lower than that in control group, but the difference was not significant. Comprehensive consideration: alfalfa should not be silage alone, adding lactic acid bacteria to improve alfalfa silage quality significantly, adding cellulase to improve alfalfa silage quality slightly, but some indexes are not up to standard, not suitable to add.
【作者单位】：内蒙古农业大学草原与资源环境学院/饲草栽培加工与高效利用农业部重点实验室;
【基金】：农业部公益性行业项目“饲草青贮工艺技术及配套设施装备的研究与示范”(201303061) 天然牧草青贮基金“内蒙古典型草原天然牧草青贮饲料品质优化调控机制研究”(31460638)资助
【分类号】：S816.53

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