不同日粮对奶牛瘤胃发酵模式及泌乳性能的影响

畜牧兽医学报 ›› 2005, Vol. 36 ›› Issue (6): 569-573.doi:

不同日粮对奶牛瘤胃发酵模式及泌乳性能的影响

王吉峰;王加启;李树聪; 汪水平; 姚美蓉; 刘仕军

1. 中国农业科学院饲料研究所，北京 100081；2.中国农业科学院畜牧研究所，北京 100094

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2005-06-25 发布日期:2005-06-25

Effects of Forage to Concentrate Ratio on Pattern of Rumen Fermentation and Performance of Lactating Dairy Cows

WANG Ji-feng; WANG Jia-qi; LI Shu-cong; WANG Shui-ping; YAO Mei-rong; LIU Shi-jun

1. Feed Research Institute，Chinese Academy of Agricultural Sciences, Beijing 100081,China;2. Institute of Animal Science，Chinese Academy of Agricultural Sciences, Beijing 100094, China

Received:1900-01-01 Revised:1900-01-01 Online:2005-06-25 Published:2005-06-25

摘要/Abstract

摘要： 选用4头安装永久瘤胃瘘管和十二指肠瘘管的泌乳奶牛（体重为483 kg±21 kg，泌乳日龄为175 d±6 d），研究4种日粮，分别为30∶70CW(粗料由羊草组成)、30∶70CCA（粗料为玉米青贮+苜蓿+羊草混合型）、50∶50CCA、65∶35CCA日粮对泌乳奶牛瘤胃内pH、NH₃-N浓度、VFA的动态变化及奶牛生产性能的影响。试验采用4×4拉丁方设计，每期23 d。结果表明，精粗比为65∶35CCA日粮条件下奶牛瘤胃内pH显著低于其它组(P＜0.01)， 65∶35CCA及50∶50CCA日粮组瘤胃内NH₃-N浓度显著高于精粗比30∶70 日粮组(P＜0.01)，瘤胃内乙酸浓度随精料比例的提高而降低（P=0.10），丙酸浓度、丁酸浓度及乙酸/丙酸比例差异均为极显著（P＜0.01）；在不同精粗比日粮条件下，乳脂率差异显著（P＜0.01）,以30∶70CCA组为最高;产奶量、乳蛋白率及非乳脂固形物含量均呈极显著差异（P＜0.01），均以高精料组65∶35CCA组为最高。

Abstract: Effects of forage to concentrate ratio on dynamic changes of pH, NH₃-N concentration, VFA pattern of rumen fermentation were studied. Four Holstein cows with rumenal cannula in mid lactation were used in 4×4 Latin square design experiment with 23 d each period. Dietary forage to concentrate ratios were 30∶70CW(forage was composed of Chinese wildrye,CW), 30∶70CCA（forage was composed of corn silage, Chinese wildrye and alfalfa, blend）, 50∶50CCA and 65∶35CCA, respectively. The results indicated there were significant changes in pH value and ammonia N concentration (P＜0.05), acetate tended to be higher in 30∶70CW (P=0.10), acetate to propionate ratio and butyrate concentration in the rumen were significantly different (P＜0.01). Milk fat percentages were significant different (P＜0.01), highest in 30∶70（blend）; Milk yield, protein percentages, and solid nonfat (SNF) contents were significantly different (P＜0.01).

王吉峰;王加启;李树聪;汪水平;姚美蓉;刘仕军. 不同日粮对奶牛瘤胃发酵模式及泌乳性能的影响[J]. 畜牧兽医学报, 2005, 36(6): 569-573.

WANG Ji-feng;WANG Jia-qi;LI Shu-cong;WANG Shui-ping;YAO Mei-rong;LIU Shi-jun. Effects of Forage to Concentrate Ratio on Pattern of Rumen Fermentation and Performance of Lactating Dairy Cows[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2005, 36(6): 569-573.

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