期刊论文

中文

草业学报

1004-5759

2015

24

12

102-111

10.11686/cyxb2015060

“十二五”科技支撑计划（2012BAD12B02-5）； 动物营养与饲料基础数据的整合与应用（2013ywf-zd-3）； 湖南省“海外名师”项目计划（湘教通[2014]309号）资助；

本校为第一机构

利用体外产气法研究不同能量水平与不同加工方式玉米对瘤胃体外发酵参数的影响。试验以玉米秸秆为主要粗饲料来源设计精粗比为65∶35的等氮饲粮，选用玉米青贮与过瘤胃脂肪调整低、高能量水平，普通玉米与蒸汽压片玉米作为不同加工方式，采用2×2因子试验设计。结果表明，高能水平饲粮的理论最大产气量、48 h 总产气量、干物质降解率均显著高于低能（P ＜0．05），普通玉米高能组的乙酸、丙酸含量显著高于低能组（P ＜0．05）。同一能量水平下，蒸汽压片处理组的48 h 总产气量均显著高于普通玉米组（P ＜0．05）；而低能条件下蒸汽压片组的总挥发酸、丙酸含量显著高于普通玉米组（P ＜0．05）。...

In vitro batch cultures were grown to investigate the effect of different energy levels and corn pro-cessing diets on ruminal fermentation parameters in a 2×2 factorial experiment.Isonitrogenous diets were con-structed with a concentrate-to-forage ratio of 65∶35 using corn straw as the main forage,and corn silage and rumen-protected fat were added to adjust the diets’energy levels.In addition,steam-flaked corn and ground corn were tested as different corn processing products.The results showed that the theoretical maximum gas production,48 h...