Effect of Salinity on Soil Microorganisms

Abstract

Masum Billah AA, Ferdous MH, Taufique T, Mehraj H, Jamal Uddin AFM (2014) Effect of insecticides on soil microorganisms. Int. J. Expt. Agric. 4(4), 24-28. know the impact of 4 selected insecticides (i.e., Diazinon 60 EC, Marshal 20 EC, Dursban 20 EC and Admire 200 SL) on soil microorganisms. The impact was expressed as amount of CO2 evolution/gram soil and dehydrogenase activity (TPF formation). CO2 evolution in soils indicates a great activity of soil microorganisms and maximum CO2 evolution was found from Marshal 20 EC (74.8, 281.2 and 142.4 μg/g soil) at 2, 8 and 24 days of incubation while Admire 200 SL (126.5 and 222.4 μg/g soil) at 4 and 16 days of incubation. Diazinon 60 EC (0.073, 0.075, 0.079, 0.072 and 0.067 µmole/ml at 2, 4, 8, 16 and 24 days of incubation respectively) had maximum TPF formation.