不同青贮方式对奶牛生产性能和经济效益的影响

目的]以石玉13号玉米为材料，比较全株玉米裹包青贮和窖贮对奶牛生产性能和经济效益的影响。方法]对裹包青贮和窖贮全株玉米在干物质营养成分，奶牛干物质采食量、产奶量、乳品质等方面进行对比分析。结果]玉米裹包青贮干物质含量高于窖贮，裹包青贮奶牛14 d和28 d的干物质采食量显著高于窖贮玉米（P<0.05）;饲喂裹包青贮和窖贮对奶牛的产奶量影响差异不显著（P>0.05）;窖贮奶牛28 d乳脂率极显著低于裹包青贮（P<0.01），乳蛋白率显著低于裹包青贮组（P<0.05）;裹包青贮与窖贮全株玉米对奶牛的产奶量影响差异不显著，但与窖贮相比，裹包青贮每头奶牛增加产奶量0.06 kg/d，每头奶牛增加效益0.23 元/d。

Effects of Different Silage Methods on Production Performance and Economic Benefits of Dairy Cows

Objective]Shiyu 13 was used as material to compare the effects of whole corn silage and silage on performance and economic benefit of dairy cows. Method]The dry matter nutrient composition，dry matter intake，milk yield and milk quality of the two groups were compared and analyzed. Result]Dry matter content of wrapped silage was higher than that of cellar silage，and dry matter intake of wrapped silage group was significantly higher than that of cellar silage group at 14 and 28 days（P<0.05）. There was no significant difference in milk yield between wrapped silage and cellar silage（P>0.05）. The milk fat percentage of dairy cows in cellar silage group was significantly lower than that in wrapped silage group（P<0.01），and the milk protein percentage was significantly lower than that of wrapped silage group（P<0.05）. Compared with cellar silage，milk yield increased by 0.06 kg and milk benefit increased by 0.23 yuan per cow per day in cellar silage group.