孕酮调节瘤胃消化代谢的研究  

STUDIES ON THE REGULATION OF THE RUMINAL DIGESTION AND METABOLISM BY PROGESTERONE

作　　者：王金洛[1] 韩正康[1] 陈杰[1] 

机构地区：[1]南京农业大学家畜生理研究室

出　　处：《南京农业大学学报》1991年第2期74-78,共5页Journal of Nanjing Agricultural University

摘　　要：5头装有瘤胃瘘管、十二指肠瘘管以及临时血管瘘管的土种成年空怀母山羊,于颈部皮下注射孕酮1.25mg/kg·WB。约3～8小时后,血液及瘤胃液中孕酮相继出现峰值,而对照期无这种变化。孕嗣能促进干青草摄入,并提高瘤胃pH、NH_3-N浓度、总脱氢酶活力(THDA)、瘤胃稀释率和瘤胃容积;昼夜通过十二指肠的食糜量、非氨氮(NAN)、微生物蛋白(MCP)量及其合成效率均明显提高。体外试验表明,以孕酮处理母水牛瘤胃液后,NH_3-N、TVFA浓度和THDA活性亦显著增加。提示:孕酮能直接或间接影响瘤胃微生物的代谢活动。Five native femal goats fitted with chronie rumen cannula, duodenal re-entranced cannula and temperory juglar vein cannula were used to study the effects of subcutandous injection of progesterone (1.25mg/kg body weight) on the ruminal digestion and metabolism. The progesterone concentration in the serum and ruminal fluid was elevated to the peak successfully alter injecting progesterone about 5～8 h. As compared with control period, the goats had intake of more roughage, the rumen pH, NH_3-N, total dehydrogenase activity, dilution rate and volume increased significantly, and the amount of digcsta, MCP, NAN passing through duodenum daily and the efficiency of rumen MCP synthesis were also raised considerably. In vitro experiment of water buffaloes showed that the corcertration of TVFA, NH_3-N was increased by adding progesterone. Results suggest that progesterone could regulate the digestion and metabolism of rumen microorganisms by direct or indirect patterns.

关 键 词：反刍动物 瘤胃 孕酮 代谢 

分 类 号：S852.2[农业科学—基础兽医学]