乳酸菌对凤梨渣青贮品质及干物质降解率的影响  

Effects of Lactic Acid Bacteria on the Quality and Dry Matter Degradation Rate of Pineapple Residue Silage

作　　者：王志敬 吴征敏 尹福泉[1] 谭伟军 高振华[1] 赵志辉 WANG Zhijing;WU Zhengmin;YIN Fuquan;TAN Weijun;GAO Zhenhua;ZHAO Zhihui(College of Coastal Agricultural Sciences,Guangdong Ocean University,Zhanjiang 524000,Guangdong,China;Qingyuan Animal Disease Prevention Control Center,Qingyuan 511518,Guangdong,China)

机构地区：[1]广东海洋大学滨海农业学院,广东湛江524000 [2]清远市动物疫病预防控制中心,广东清远511518

出　　处：《四川农业大学学报》2022年第5期683-689,共7页Journal of Sichuan Agricultural University

基　　金：2020年广东省科技专项资金(“大专项+任务清单”)项目(2020A03025、2021A05209);广东省现代草牧业(羊)产业技术体系项目(2019KJ127);广东省教育厅项目(A21035);2020年度清远市社会发展领域自筹经费科技计划项目(200805164563031)。

摘　　要：【目的】探究乳酸菌对凤梨渣青贮品质及干物质降解率的影响。【方法】将乳酸菌以0、2.5×10^(8)、5.0×10^(8)、1.0×10^(9)cfu/kg添加量添加至凤梨渣中(Ⅰ、Ⅱ、Ⅲ、Ⅳ组),每组3个重复,常温青贮4周后取样测定发酵品质和干物质降解率。【结果】乳酸菌添加组的CP(P<0.05)、AA、PA均高于对照组;Ⅱ、Ⅳ组的LA、TVFA高于对照组(P>0.05);Ⅱ组亚硝酸盐(P<0.05)、DM低于对照组;乳酸菌添加组的NH-N、NH-N/TN均显著小于对照组(P<0.05)。乳酸菌添加水平与DMD呈显著相关性(P<0.05);瘤胃液体外发酵时间对DMD呈极显著相关性(P<0.01)。乳酸菌可能是通过降低DM、P、NH-N、NH-N/TN或者提高Ash、Ca、CP、LA、AA、TVFA来调节DMD。【结论】乳酸菌可改善凤梨渣青贮饲料品质和干物质降解率,以2.5×10^(8)cfu/kg添加剂量为宜。[Objective] This study was comducted to explore the effects of lactic acid bacteria on the silage quality and dry matter degradation rate of pineapple residue,[Method] The lactic acid bacteria were added to pineapple residue with concentration of 0 and 2.5×10^(8),5.0×10^(8),1.0×10^(9) cfu/kg(groups Ⅰ,Ⅱ,Ⅲ and Ⅳ), with 3 repetitions in each group.The samples were taken after silage at room temperature for 4 weeks to determine the fermentation quality and dry matter degradation rate.[Result] The results showed that CP(P<0.05),AA and PA in the Lactobacillus addition group were higher than that in the control group;La and tvfa in group Ⅱ and Ⅳ were higher than that in the control group(P>0.05);Ⅱ nitrite(P<0.05) and DM were lower than that in the control group;NH3-N and NH3-N/TN in the Lactobacillus addition group were significantly lower than those in the control group(P<0.05).The addition level of lactic acid bacteria was significantly correlated with DMD(P<0.05);Rumen fermentation time was significantly correlated with DMD(P<0.01).Lactic acid bacteria can improve DMD by reducing DM,P,NH-N,NH-N/TN or increasing ash,CA,CP,La,A A and tvfa.[Conclusion] In conclusion,lactic acid bacteria are found to be able to improve the quality and dry matter degradation rate of pineapple residue silage,and the value of 2.5×10^(8) cfu/kg additive amount is appropriate.

关 键 词：凤梨渣 青贮品质 干物质降解率 相对饲喂价值 乳酸菌 

分 类 号：S816[农业科学—饲料科学]