Profiling Of the Selected Residual Soil Enzymes Associated With Glyphosate Impacted Top Soils (Short Communication)

Abstract

The edaphic enzyme profiles associated with compounded top herbicide; Glyphosate impacted and control soils sourced from a commercial farm setting and a fallow land were determined using routine methodologies. The commercial farm establishment and the fallow farm were sited in Amukpe and Adavware communities both located in Sapele Local Government Area, Delta State, Nigeria. The amylase and invertase content of the soils ranged from 11.43 μg glucose/g soil ± 0.24 to 52.15 μg glucose/g soil ± 0.68 and 55.46 μg sucrose/g soil ± 1.25 to 548.13 μg sucrose/g soil ± 15.56 respectively. The mean protease, urease, and dehydrogenase activities varied from 59.24 μg tyrosine/g soil ± 1.59 to 122.65 μg tyrosine/g soil ± 0.59, 6.34 μg NH4+/g soil ± 0.22 to 25.63 μg NH4+/g soil ± 0.46 and 5.61 μg TPF/g soil ± 0.18 to 13.86 μg TPF/g soil ± 0.26. The differences in soil enzymatic activity amongst the glyphosate exposed soils and the control soil were statistically significant (p<0.001). The usage of glyphosates impacted negatively on the analyzed soil invertase, protease, amylase, and urease activities but had no observable effect on dehydrogenase activity.