Haze of fine particulate matter (Particulate Matter 2.5,PM2.5) as an important environmental pollutant has a huge threat......

选择３０头２８±２日龄断奶仔猪（平均体重４．５ｋｇ），研究饲粮粗蛋白质（ＣＰ）水平对早期断奶仔猪组织病理变化的影响。试验结果显示：（１）饲粮ＣＰ水平分别与仔猪的ＣＰ摄......