不同精粗比对木薯茎叶型全混合日粮山羊瘤胃降解率的影响  

Effect of Different Concentrate-roughage Ratios on Rumen Degradability of Cassava Stems and Leaves Total Mixed Ration in Goat

作　　者：胡琳[1,2] 王定发[2] 李韦[1,2] 周璐丽[2] 李茂[2] 周汉林[2] HU Lin WANG Ding-fa LI Wei ZHOU Lu-li LI Mao ZHOU Han-lin(Agronomy of Hainan University, Haikou 570100, China Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou 571737, China)

机构地区：[1]海南大学农学院,海口570100 [2]中国热带农业科学院热带作物品种资源研究所,儋州571737

出　　处：《中国畜牧兽医》2016年第11期2914-2921,共8页China Animal Husbandry & Veterinary Medicine

基　　金：海南省社会发展科技专项(SF201447);公益性行业(农业)科研专项经费项目(201403049)

摘　　要：本试验研究了以木薯茎叶为粗料、不同精粗比全混合日粮（TMR）养分在山羊瘤胃中的降解率,旨在为木薯茎叶在羊生产中的应用提供试验依据。选用6只装有永久性瘤胃瘘管的海南黑山羊作为试验动物,采用尼龙袋法评定6种不同精粗比（2∶8、3∶7、4∶6、5∶5、6∶4和7∶3）的TMR中干物质（DM）、粗蛋白质（CP）、中性洗涤纤维（NDF）和酸性洗涤纤维（ADF）的瘤胃降解率。结果表明,精粗比为4∶6、5∶5、6∶4、7∶3时的DM有效降解率均显著高于精粗比为2∶8、3∶7时的DM有效降解率（P〈0.05）;精粗比为2∶8、3∶7、4∶6的CP有效降解率显著高于精粗比例为5∶5、6∶4、7∶3的CP有效降解率（P〈0.05）;精粗比为5∶5时的NDF有效降解率显著高于其他各组（P〈0.05）;精粗比为3∶7时的ADF有效降解率显著高于精粗比为4∶6、5∶5、6∶4和7∶3时的ADF有效降解率（P〈0.05）。本试验中,精饲料与木薯茎叶比例为3∶7、4∶6和5∶5的全混合日粮养分有较高的瘤胃有效降解率,实际生产中建议使用精粗比4∶6~5∶5范围的TMR。The rumen degradations of TMR were studied in this experiment,in which cassava stems and leaves were used as roughage and formulated with concentrate in different proportions.The purpose of this study was to formulate the available TMR for finishing goat,and provide a theoretical basis for the applications of cassava stems and leaves in goat production.Six Hainan Black goats with permanent rumen fistulas were selected,the rumen degradabilities of DM,CP,NDF and ADF of TMR with 6different concentrate to forage ratio（2∶8,3∶7,4∶6,5∶5,6∶4and 7∶3）were tested using nylon bag method.The results showed that,the DM effective degradabilities at the ratio of 4∶6,5∶5,6∶4,7∶3were significantly higher than that of 2∶8and 3∶7（P〈0.05）.CP effective degradabilities at the ratio of 2∶8,3∶7,4∶6were significantly higher than that of 5∶5,6∶4and 7∶3（P〈0.05）.The NDF effective degradation at the ratio of 5∶5was significantly higher than that in the other groups（P〈0.05）.The ADF degradation at the ratio of 3∶7was significantly higher than that of 4∶6,5∶5,6∶4and 7∶3（P〈0.05）.The results indicated that,the nutrient degradation in rumen were higher when the concentrate to forage（cassava stems and leaves）ratio in TMR were 3∶7,4∶6and 5∶5,and the recommended ratiorange were 4∶6to 5∶5in production practice.

关 键 词：全混合日粮 精粗比 木薯茎叶 瘤胃降解率 

分 类 号：S816[农业科学—饲料科学]