soil pollution index造句

• Soil pollution index and olsen - p content were more closely related to species diversity in polluted soil , while ph and olsen - p content were more closely related to spore den sity
  重金属污染土壤中，综合污染指数和速效磷含量是影响种的丰度的主要因素，土壤ph值与重金属综合污染指数是影响孢子密度的主要因素。