不同日粮采食水平对青年母水牛尿中嘌呤衍生物排出规律的影响研究  

Effect of different dietary levels on excretion of urinary purine derivatives in young buffalo

作　　者：李丽莉[1] 梁坤[1,2] 韦升菊[1] 白剑飞[2] 邹彩霞[1] 庞春英[1] 梁贤威[1] 郑威[1] 李舒露[1] 夏中生[2] 杨炳壮[1] 

机构地区：[1]中国农业科学院(广西)水牛研究所,广西南宁530001 [2]广西大学动物科技学院,广西南宁530005

出　　处：《黑龙江畜牧兽医》2009年第12期11-14,共4页Heilongjiang Animal Science And veterinary Medicine

基　　金：广西科学基金资助项目(桂科青0991066;桂科青0832071;桂科青0832072;桂科转0718005-4A);广西水牛所基本科研业务费项目(水牛基0830006;水牛基0830007)

摘　　要：为了探讨青年母水牛尿中嘌呤衍生物排出量的变化规律,试验选取3头24月龄左右、体重相近的青年瘘管母水牛,采用随机区组试验设计,分别饲喂3种不同采食水平的试验日粮。结果表明:随着采食水平的降低,营养物质的表观消化率呈递增趋势(P<0.05);粪氮(P<0.01)、尿氮(P<0.05)呈递减趋势;尿中嘌呤衍生物的排出量显著降低(P<0.05),且与微生物氮估测值之间有显著的回归关系:Y=3.5427X-25.2850(R2=0.9907;n=3),Y=6.2093X+7.5679(R2=0.9907;n=3;P<0.05),与可消化有机物干物质采食量之间也有存在显著的线性相关:Y=6.2093X+7.5679(R2=0.9961;n=3;P<0.05);肌酸酐的排出量稳定在40mmol/d左右,各处理间无显著差异(P>0.05)。Three young fistulae buffalos （ 24 - month - old） were selected to divide into three periods, to study the effects of feeding different dietary levels on urinary excretion of PD and ereatinine of young buffalo. The results showed that with the level of nutrition decreased, the apparent digestibility of the the feed nutrients were increased （ P 〈 0.05 ）. Fecal nitrogen （ P 〈 0.01 ） and urine nitrogen （ P 〈 0.05 ） were significantly decreased. Urinary excretion of PD significantly decreased （P 〈 0. 05 ） , moreover. In this study two equations were available from the relativity of PD excretion （Y） with MN （X） and DOMI （X） , as follows respectively ： Y = 3. 542 7X - 25. 285 0 （ R^2 = 0. 990 7 ; n = 3 ）, Y = 6. 209 3X ＋ 7. 567 9 （ R^2 = 0. 996 1 ; n = 3 ）. Urinary excretion of creatinine was not significantly affected by concentrate, roughage ration and the number stabilized at about 40 mmol/d（ P 〉 0.05 ）.

关 键 词：水牛 采食水平 嘌呤衍生物 

分 类 号：S816[农业科学—饲料科学]