College of Animal Science and Technology and State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing 100193, China; Department of Animal Sciences, The Ohio State University, Columbus, OH 43210-1094, USA.
College of Animal Science and Technology and State Key Laboratory of Animal Nutrition, China Agricultural University, Beijing 100193, China.
Bioresour Technol. 2015 Jun;186:25-33. doi: 10.1016/j.biortech.2015.02.110. Epub 2015 Mar 14.
The effects of three types of dietary sulfur on in vitro fermentation characteristics, sulfide production, methane production, and microbial populations at two different buffer capacities were examined using in vitro rumen cultures. Addition of dry distilled grain with soluble (DDGS) generally decreased total gas production, degradation of dry matter and neutral detergent fiber, and concentration of total volatile fatty acids, while increasing ammonia concentration. High buffering capacity alleviated these adverse effects on fermentation. Increased sulfur content resulted in decreased methane emission, but total Archaea population was not changed significantly. The population of sulfate reducing bacteria was increased in a sulfur type-dependent manner. These results suggest that types of dietary sulfur and buffering capacity can affect rumen fermentation and sulfide production. Diet buffering capacity, and probably alkalinity, may be increased to alleviate some of the adverse effects associated with feeding DDGS at high levels.
采用体外瘤胃培养的方法，研究了 3 种饲粮硫对不同缓冲能力下体外发酵特性、硫化物生成、甲烷生成和微生物种群的影响。添加含可溶物的干蒸馏谷物（DDGS）通常会降低总气体生成量、干物质和中性洗涤剂纤维的降解量以及总挥发性脂肪酸的浓度，同时提高氨浓度。高缓冲能力缓解了这些对发酵的不利影响。增加硫含量会减少甲烷排放，但总古菌种群没有明显变化。硫酸盐还原菌的数量以硫依赖的方式增加。这些结果表明，饲粮硫的类型和缓冲能力会影响瘤胃发酵和硫化物生成。可以增加日粮缓冲能力，可能还有碱度，以缓解高浓度 DDGS 喂养相关的一些不利影响。
