Effect of organic/inorganic compounds on the enzymes in soil under acid rain stress

The main effects of pollutions including acid rain, Cu 2 ,atrazine and their combined products on the activities of urease, invertin, acid phosphatase and catalase were studied by means of orthogonal test. The results showed that H and Cu 2 had significant influence on the activities of four enzymes and the ability of their inhibiting followed the order: H >Cu 2 . Al 3 and atrazine only had litter effects on the activity of urease and phosphatase, respectively. Furthermore, interaction analysis revealed that Cu 2 -H affected on the activity of acid phosphatase significantly and antagonism on invertin and urease, Cu 2 -atrazine only exhibited the synergism on the activity of acid phosphatase. But atrazine-H had non-interaction within the investigated concentration range. Among four enzymes, acid phosphatase was the most sensitive one to the contaminations.