The effects of Al and F interaction on the soil enzyme of Bai tea and Zhirenzao tea rhizosphere were studied by means of pot culture experiments.Results revealed that Al significantly inhibited urease activity and polyphenoloxidase activity

and the activities of the other eight enzymes were increased significantly under low Al concentration(200 mg/kg)

but decreased slightly under higher concentration(400 mg/kg).With the addition of F

polyphenoloxidase activity slightly decreased

and the activities of the others increased at low F concentration(40 mg/kg) and then decreased at higher F concentration(120 mg/kg)

but there was no obvious effect on phosphatase or uric acidase.The effect of F on soil enzyme of tea rhizosphere was less significant than that of Al.When Al and F coexisted

interaction of Al and F showed different significant combination effects on enzyme activity

synergistic or antagonistic

which depending on the concentration association of Al and F

the specie of soil enzyme

as well as the variety of tea plant treated.We also found that with the coexistence of 40 mg/kg F and 200 mg/kg Al

almost all of the enzyme activities were stimulated and reached the highest point which indicating that some certain ratio of Al/F was needed for tea plant.In addition

obvious different response of soil enzyme to Al and F stress occurred between Bai tea and Zhirenzao tea rhizosphere

whether the difference had relation with the different tolerance to Al and F remain to probe into further.