不同添加剂对菊芋茎叶青贮品质及营养价值的影响  

Effects of different additives on the quality and nutritional value of the stem and leaf silage of Helianthus tuberosus

作　　者：吴涛 柳永丽 赵芳芳[1] WU Tao;LIU Yongli;ZHAO Fangfang(College of Animal Science and Technology,Gansu Agricultural University,Lanzhou 730070,Gansu,China)

机构地区：[1]甘肃农业大学动物科学技术学院,甘肃兰州730070

出　　处：《草业科学》2022年第4期770-777,共8页Pratacultural Science

基　　金：甘肃省自然科学基金(20JR10RA536);甘肃省高等学校创新基金(2020B-124)。

摘　　要：为了合理开发和利用菊芋(Helianthus tuberosus)茎叶资源,本研究以成熟期菊芋茎叶为原料,研究添加0.28%乳酸菌(乳酸菌组)和0.28%菊粉(菊粉组)对菊芋茎叶青贮品质的影响。采用两极离体法评定其营养价值,以期为菊芋茎叶的饲料化利用提供参考依据。试验结果表明,1)与对照组(无添加剂)相比,乳酸菌组和菊粉组的感官评定为优级。2)与对照组相比,乳酸菌组pH、丁酸、氨态氮占总氮量(NH3-N/TN)均显著低于对照组(P<0.05),而乙酸、乳酸含量显著高于对照组;菊粉组pH显著低于对照组(P<0.05),乙酸、乳酸含量显著高于对照组;乳酸菌组与菊粉组相比,乳酸菌组pH、丁酸含量显著低于菊粉组(P<0.05),而乙酸含量和NH3-N/TN则显著高于菊粉组。3)与对照组相比,乳酸菌组和菊粉组的粗灰分含量显著降低(P<0.05),水溶性碳水化合物显著升高。4)与对照组相比,乳酸菌组干物质、中性洗涤纤维消化率显著升高(P<0.05),菊粉组干物质消化率显著升高而酸性洗涤纤维消化率显著降低;乳酸菌组中性洗涤纤维、酸性洗涤纤维消化率显著高于菊粉组,而干物质消化率差异不明显(P>0.05);综上所述,添加0.28%乳酸菌和0.28%菊粉均可提高菊芋茎叶青贮饲料的发酵品质和营养价值,且同等浓度下,乳酸菌的改善效果更优。In this study,the stems and leaves of matured Jerusalem artichoke plants were used as raw materials to develop and utilize the stem and leaf resources of Helianthus tuberosus.The effects of the addition of 0.28%lactic acid bacteria(lactic acid bacteria group)and 0.28%inulin(inulin group)on the silage quality of H.tuberosus stem and leaf were studied.To provide a reference for fodder utilization of H.tuberosus stems and leaves,the nutritional value of H.tuberosus was evaluated using a bipolar in vitro method.The results are as follows:1)The sensory evaluation of the lactic acid bacteria and inulin groups was superior to that of the control group(no additive).2)The p H,butyric acid content,and ammonia nitrogen content in total nitrogen(NH3-N/TN)in the lactic acid bacteria group were significantly lower than those in the control group(P<0.05);however,acetic and lactic acid contents were significantly higher than those in the control group.The pH in the inulin group was significantly lower than that in the control group(P<0.05),but the acetic and lactic acid contents were significantly higher than those in the control group(P<0.05).The p H and butyric acid content in the lactic acid bacteria group were significantly lower than those in the inulin group(P<0.05),whereas the acetic acid content and NH3-N/TN in the lactic acid bacteria group were significantly higher than those in the inulin group.3)The crude ash content in the lactic acid bacteria and inulin groups was significantly lower than that in the control group(P<0.05),but the water-soluble carbohydrate content was significantly higher than that in the control group.4)Compared with that in the control group,the digestibility of dry matter and neutral detergent fiber in the lactic acid bacteria and inulin groups were significantly higher(P<0.05);however,the digestibility of acid detergent fiber was significantly lower than that of the control group.The digestibility of neutral detergent fiber and acid detergent fiber in the lactic acid bacteria group was signific

关 键 词：菊芋茎叶 乳酸菌 菊粉 两极离体法 青贮品质 养分表观消化率 感官评定 

分 类 号：S816.53[农业科学—饲料科学]