Correlation between aggregate stability and microbiological activity in two Russian soil types

摘要

Two Russian soil type, soddy - podzolic soil from Vladimerskaya region and dark - gray forest soil from Korskya region were taken .some microbiological p arameters were assyed as basal respiration, substrate induced respiration, microbial biomass, microbial metabolic coefficient and correlated with soil aggregate stability concerning soil organic matter ,soil texture and soil bulk density . The result shown a positive correlation between all microbiological paramete rs with soil aggregate stability at this rank, microbial metabolic coefficient microbial biomass = substrate induced respiration basal respiration. Microbiological parameters and soil aggregate stability in dark - gray forest soil are greater than soddy - podzolic soil except basal respiration as a result of high organic content in this soil as will as the biomass as a percent of soil total organic matter. aggregate disintegration coefficient of dark - gray forest soil is 0.0028 with R 2 0.927 and need 85 ra in drop (equivalent to an energy of 83385 J Kg - 1 ) greater than soddy - podzolic which had disintegration coefficient 0.0039 with R 2 0.849 and needed only 40 rain drop (equivalent to an energy of 39240 J Kg - 1 ) .