xxch 發(fā)表于 2010-11-17 08:20 同意樓上的,理論上是那樣,但是如果劃分過細(xì)的話,會(huì)讓養(yǎng)殖戶更無所適從,而且對(duì)于換料對(duì)腸道的應(yīng)激上來看,也是 ...