In order to investigate the relationship between soil enzyme activities and soil fertility with controlled release coated urea application

soil samples from protected vegetable field grown with cucumber

tomato and pepper were taken

and soil enzyme acitivities as well as nutrient content were determined. Results showed that application of coated urea significantly improved soil organic matter

total N

alkali soluble N

nitrate

ammonium

available potash

and decreased available P content in comparison to urea. Coated urea application increased the activities of polyphenol oxidase

phosphatase

and urease

which were significantly correlated with soil nutrient factors. However

coated urea application did not increased the activities of catalse and invertase

and no significant relationship was observed between catalse and invertase and soil nutrient factors

It is concluded that it is important to consider specific crop when studying the relationship between soil enzyme activities and soil nutrient.