试验旨在研究荷斯坦奶牛日粮中添加丝兰提取物产品是否能消除或是减弱其尿液中氨氮含量,从而降低粪尿臭味,提升牛舍内空气质量;同......

试验旨在研究荷斯坦奶牛日粮中添加丝兰提取物产品是否能消除或是减弱其尿液中氨氮含量,从而降低粪尿臭味,提升牛舍内空气质量;同......

The Gansu zokor ( Myospalax cansus) is a solitary fossorial rodent, which inhabits its own tunnel system. The Gansu zoko......