Microbial activity in soils under mediterranean environmental conditions

摘要: Thirty-six soils from twelve different arid zones SE Spain under Mediterranean environmental conditions were characterized by a range of measurements indicative soil microbiological activity. Our aim was to relate the degradation undergone these with their and enzymatic characteristics. In general, studied had low These showed similar values pH total organic-C (TOC) available nutrient content. The behaviour dehydrogenase activity that CO2 emission biomass-C, ranging 4 148 μg iodo-nitrotetrazolium formazan g−1 soil. A positive correlation found between above indices which, in turn, negatively correlated metabolic quotient values. No physical variables such as clay content, WHC soils. However, there negative electrical conductivity. urease, protease which hydrolyses N-α-benzoil-l-argininamide, casein, phosphatase β-glucosidase were, low. There hydrolases studied. also emission, biomass-C-to-TOC ratio dehydrogenase.