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当前位置: 首页 > 文章 > 不同NFC/NDF饲粮和硫胺素对奶牛瘤胃代谢的影响 动物营养学报 2013,25 (9) 2012-2020
Position: Home > Articles > Effects of Different Dietary NFC/NDF and Thiamine on Rumen Metabolism in Dairy Cows Chinese Journal of Animal Nutrition 2013,25 (9) 2012-2020

不同NFC/NDF饲粮和硫胺素对奶牛瘤胃代谢的影响

作  者：
蔡晶晶;王洪荣;付聪;李志腾;朱婧靓
单  位：
扬州大学动物科学与技术学院
关键词：
NFC/NDF;硫胺素;亚急性瘤胃酸中毒;瘤胃发酵
摘  要：
本试验旨在研究不同非纤维性碳水化合物和中性洗涤纤维比(NFC/NDF)饲粮和硫胺素对荷斯坦奶牛瘤胃代谢的影响。选用3头健康状况良好且安装永久性瘤胃瘘管的荷斯坦奶牛,采用3×3完全拉丁方试验设计。试验分3期进行,每期23 d,每期中预试期20 d,正试期3 d;3个试验组分别饲喂NFC/NDF为1.41(精粗比5∶5)、NFC/NDF为2.01(精粗比7∶3)、NFC/NDF为2.01(精粗比7∶3)+180 mg/kg硫胺素的试验饲粮。结果表明:提高饲粮NFC/NDF,瘤胃液pH显著降低(P<0.05),氨态氮(NH3-N)浓度显著或极显著上升(P<0.05或P<0.01),乳酸浓度显著或极显著升高(P<0.05或P<0.01),乙酸比例(P<0.05)、乙酸/丙酸(P<0.05或P<0.01)显著或极显著降低,丙酸、丁酸比例显著或极显著上升(P<0.05或P<0.01)。高NFC/NDF饲粮添加硫胺素后,瘤胃液pH有升高趋势,差异不显著(P>0.05),NH3-N浓度显著降低(P<0.05),乳酸浓度显著或极显著降低(P<0.05或P<0.01),乙酸比例和乙酸/丙酸显著或极显著降低(P<0.05或P<0.01),丙酸比例显著或极显著升高(P<0.05或P<0.01)。由此可见,饲粮NFC/NDF的增加能够诱导瘘管奶牛产生亚急性瘤胃酸中毒,添加180 mg/kg硫胺素能够缓解这一现象。
译  名：
Effects of Different Dietary NFC/NDF and Thiamine on Rumen Metabolism in Dairy Cows
作  者：
CAI Jingjing;WANG Hongrong;FU Cong;LI Zhiteng;ZHU Jingjing;College of Animal Science and Technology,Yangzhou University;
关键词：
NFC/NDF;;thiamin;;subactue ruminal acidosis;;rumen fermentation
摘  要：
This experiment was conducted to study the effects of different dietary non-fiber carbohydrates to neutral detergent fiber ratios(NFC/NDF) and thiamine on rumen metabolism in Holstein dairy cows.Three healthy Holstein dairy cows equipped with rumen fistulous were used in a 3 × 3 Latin square design experiment.The experiment was carried out for 3 periods with 23 days(20-day pre-trial period and 3-day trial period) per period.The cows were fed three different diets,which were NFC/NDF = 1.41(concentrate to forage 5: 5),NFC/NDF = 2.01(concentrate to forage 7∶3) and NFC/NDF = 2.01(concentrate to forage 7 ∶ 3)+180 mg/kg thiamine,respectively.The results showed as follows: with the increase of dietary NFC/NDF,rumen fluid pH was significantly decreased(P < 0.05),the NH 3-N concentration of rumen fluid was significantly increased(P < 0.05 or P < 0.01),and the lactic acid concentration of rumen fluid was also significantly increased(P < 0.05 or P < 0.01),while the acetic acid proportion(P < 0.05) and acetic acid/propionic acid(P <0.05 or P <0.01) of rumen fluid were significantly decreased,and the proportions of propionic acid proportion and butyric acid of rumen fluid were significantly increased(P < 0.05 or P < 0.01).The dietary supplementation of thiamine tended to increase rumen fluid pH(P > 0.05),while rumen fluid NH 3-N concentration was significantly decreased(P < 0.05),lactic acid concentration was decreased significantly(P < 0.05 or P < 0.01),and acetic acid proportion and acetic acid/propionic acid of rumen fluid were significantly decreased(P < 0.05),while propionic acid proportion was significantly increased(P < 0.05 or P < 0.01).These results indicate that the increase of dietary NFC/NDF can induce subactue ruminal acidosis,and the alterative dietary supplementation of thiamine at 180 mg/kg can release the rumen acidosis.

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