银合欢涠洲DHP－降解细菌脱毒及饲喂乳牛效果的研究  

EFFECT OF INTRODUCING WEIZHOU DHP-DEGRADING BACTERIA ON DAIBY HEIFEKRS FED WITH LEUCAENA LEUCOCEPHALA

作　　者：汪儆[1] 雷祖玉[1] 冯学勤[1] 杨家晃[1] 吴柱月[1] 宋光谟[1] 黄增发 

机构地区：[1]中国农业科学院畜牧研究所,广西壮族自治区畜牧研究所,广西壮族自治区北海市农牧局

出　　处：《畜牧兽医学报》1994年第3期206-212,共7页ACTA VETERINARIA ET ZOOTECHNICA SINICA

基　　金：国家自然科学基金

摘　　要：将１８头乳用后备母牛分为３组，其中Ⅲ组为对照组，喂象草，Ⅰ、Ⅱ组喂银合欢并分别以灌胃接种和接触感染方式使试牛获得涸洲ＤＨｐ－降解细菌，观察银合欢的脱毒和饲养效果。结果指出，接种后Ⅰ、Ⅱ组试牛尿中３－羟基－４（１氢）吡啶酮（ＤＨＰ）浓度明显降低，其中Ⅰ组各试牛最后均为零，Ⅰ、Ⅱ组试牛瘤胃液抽出后在３７℃体外培养一周，可使培养基中ＤＨＰ全部降解，由此说明涸洲ＤＨｐ～降解细菌可在试牛瘤胃中充分繁殖生长并发挥脱毒作用。Ⅰ、Ⅱ、Ⅲ组试牛的平均日增重分别为０．８２千克、０．７１千克和０．３３千克，饲料报酬分别为５．７３、１．７０和１３．８１，１、Ⅱ组试牛平均日增重和饲料报酬均极显著高于ｍ组（Ｐ＜０．０１），而Ⅰ、Ⅱ组之间无显著差异（Ｐ＞０．０５），故经涠洲ＤＨＰ－降解细菌脱毒后，银合欢是一种优良的蛋白质饲料。Eigliteen heifers were blocked into three groups randomly. Group Ⅲ was controlfed with elephant grass, Group Ⅰ and Ⅱ were fed with Leucaena leucocephala and in-troduced Weizhou DHP-degrading bacteria by dosing or spreading to observe the effecton the animals feeding Leucaena. Results in this trial indicated that DHP concentrationin the urine of all animals in group Ⅰ and Ⅱ were very low or free and the rumenfluid from those groups could degrade DHP in vitro in the late period of the trial. Theaverage daily auain and feed conversion rate in groupⅠ, Ⅱ and Ⅲ were 0.82kg and5.730, 0.71kg and 4.703, and 0.33kg and 13.805 respectively. Both average daily gainand feed conversion rate in group Ⅰ and Ⅱ were significantly higher than those in groupⅢ (P<0.01) , but there were no difference between group Ⅰand Ⅱ (P/0.05) , Ithas been shown that DHP in rumen from mimosine in Leucaena consummed by the ani-mals in this trial was completely degraded, so an excellent animal performance couldoccure when Weizhon DHP-degrading bacteria was introduced to the dairy heifers.

关 键 词：DHP-降解细菌 乳牛 银合欢 脱毒 

分 类 号：S823.5[农业科学—畜牧学]