Effect of pendimethalin and oxyfluorfen on soil enzyme activity.

Abstract

A.fie.Id exper~ment was conducted to study tire effect of pendimellralin and oxyjluorfen on soil enzyme activities in raddish crop There was s1g;ifica;1 dif[e~ence o~served . in acid, alkaline phosphatase and dehydrogenase activities between the herbicide treatments and periods of :tu fa a; tlreif/1r mterac~1on: Acid, alkaline phosphatase and delrydrogenase activity was found to be increased from O days after application o ays a er app/ica11on (DAA) all tire treatments and there was a decrease al tire time of harvest. In the two seasons of study plrOSP_hatases and delrydrogenase showed maximum activity at 30 DAA. T71e interaction effect (treatments and DAA) showed that tire acid alk~l1;e phosphatase and d~h?'drogen.ase . act~vity in tire herbicide treated plots was significantly higher Jiran tire control among all th~ pe~:o s. low~r l~v~I of lrerb1c1de application increased enzyme activity as compared Jo higher dose of herbicide. Oxyjluorfen @ O. I 5 kg a i Ira slr 1 ofiwed 1 1 1 nl11b1tory effect on enzyme activity where as urease levels in tire herbicide treated plots were significantly lower than tlr.e con/ro or a tire growth stages.