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 0
WT5BZ]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).
出处
《畜牧兽医学报》
CAS
CSCD
北大核心
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
