Background:Two studies were conducted to evaluate the effects of dietary natural betaine on sow reproductive performance......

目的:观察哺乳期后幼鼠在不同饲料锌水平条件下的生长情况,探讨饲料中锌水平对幼鼠大脑皮质、海马及睾丸组织锌转运体3(ZnT3)mRNA......