The effects of different types of compound acidifiers (encapsulated and non-encapsulated) in maize-soybean basic diets on acidity and development of the gastroi
[Objective] To understand the overwintering of Rana dybowskii under four overwintering modes in northern Guangdong′s mountainous areas. [Method] The overwinter
[Objective] To study the correlation between HI titer and protection against IBV challenge in SPF layers. [Method] SPF layers were randomly divided into four gr