发现地势低、沙淤两合土质地区的鼠密度与鼠带毒率均大于地势高、沙矼土质地区。
It was found that the rodent 's density and the positive rate of HFRS virus antigens in shoaly land with lower terrain and silt loam were all higher than those in hillock land with higher tertian and shandy loam .
矼