粗料型日粮真胃灌注棕榈油对肉牛能量和蛋白质转化效率影响的初步研究  

PRELIMINARY STUDY ON THE EFFECTS OF INTRA ABOMASUM INFUSION OF DIFFERENT PALM OIL LEVELS ON ENERGY AND PROTEIN CONVERTION IN STEERS FED FORAGE BASED DIETS

作　　者：李建国[1] 冯仰廉[2] 莫放[2] 赵广永[2] 杨雅芳[2] 

机构地区：[1]河北农业大学动物科技学院,保定071001 [2]中国农业大学动物科技学院,北京100094

出　　处：《畜牧兽医学报》2000年第5期385-389,共5页ACTA VETERINARIA ET ZOOTECHNICA SINICA

基　　金：国家自然科学基金项目!"反刍动物能量转化规律及营养调控"(39330 1 70 )的资助

摘　　要：用安装真胃瘘管体重 370kg的 4头阉牛 ,按 4× 4完全拉丁方设计 ,用KB 1型自控大型呼吸测热室 ,研究真胃灌注不同水平棕榈油 (10 0 g/d、2 0 0 g/d、30 0g/d和 0 g/d)对能量、蛋白质转化效率及血液生化指标的影响。结果表明 :(1)真胃灌注棕榈油显著降低HP/ME ,并以灌注 2 0 0 g最低 ,分别比对照组、10 0 g和 30 0 g组低 12 76 % (P <0 0 1)、6 53% (P <0 0 5)和 0 48% (P >0 0 5) ;(2 )真胃灌注棕榈油的平均Kf值比未灌注组增加 50 91% (P <0 0 1) ,灌注 2 0 0 g和 30 0 g组的Kf值高于 10 0g组 (P <0 0 5) ,但 2 0 0 g组与 30 0 g组差异不显著 (P >0 0 5) ;(3)与未灌注组相比 ,真胃灌注棕榈油可使能量、脂肪和蛋白质沉积量显著增加 (P <0 0 1)。真胃灌注 2 0 0g组的能量沉积最高 ,分别比对照组、10 0 g组和 30 0g组提高 7 16MJ/d(P <0 0 1)、3 82MJ/d(P <0 0 5)和 0 2 8MJ/d(P >0 0 5)。脂肪沉积量分别提高 172 35g/d(P <0 0 1)、92 0 8g/d(P <0 0 1)和10 54g/d(P >0 0 5)。 (4 )真胃灌注棕榈油可显著提高氮沉积 (P <0 0 5) ,沉积氮 (RN ,g/d)或可消化氮 (DN)转化为RN的效率 (% )与棕榈油灌注量 (X ,g/d)均存在线性正相关关系 ,RN(g/d) =5 0 1+0 0WT5BZ]Four adult castrated steers with permanent abomasum cannulas according to a complete 4×4 Latin square design in respiratory double chambers (BAU KB 1)were used to determine the effects of abomasal infusion with palm oil of 0,100,200,and 300 g/d on the energy conversion.The results demonstrated that (1) the intra abomasal infusion of different level of palm oil significantly decreased HP/ME (P<0 05),markedly increased Kf and fat retention (P<0 01).The HP/ME of infusion of 200g palm oil was the lowest compared with other treatment (P<0 05).There was no difference in Kf between infusion of 200g and of 300g palm oil.(2)Energy retention,fat retention,nitrogen retention and the efficiency of digestible nitrogen conversion to retention N were improved markedly (P<0 01) with the increment of infusion with palm oil.Energy retention of infusion of 200g palm oil was the highest,and 7 16MJ/d (P<0 05),3 82MJ/d (P<0 05) as well as 0 28MJ/d (P>0 05) higher than that of infusion of 0g,100g and 300g palm oil,respectively.There was highly correlation between nitrogen retention and the infusion levels of palm oil y=5 01+0 01x,r=0 9998,P<0 01,between nitrogen retention/digestible nitrogen and the infusion levels of palm oil y=22 21+0 06x,r=0 9991,P<0 01.(3)The blood glucose and insulin concentration increased significantly after intra abomasal infusion of palm oil (P<0 05).

关 键 词：肉牛 真胃灌注 棕榈油 能量代谢 蛋白质转化 

分 类 号：S823.92[农业科学—畜牧学] S823.5[农业科学—畜牧兽医]