Main content area

Effect of forest and soil type on microbial biomass carbon and respiration

Habashi, Hashem
Eurasian soil science 2016 v.49 no.9 pp. 1084-1089
Cambisols, Fagus, Leptosols, Luvisols, analysis of variance, carbon, carbon nitrogen ratio, forest soils, forest types, microbial biomass, organic compounds, pH, plant litter, regression analysis, soil microorganisms, soil respiration
The aim of study was to evaluate the variation of soil microbial biomass carbon (Cₘᵢc) and microbial respiration (MR) in three types soil (Chromic Cambisols, Chromic Luvisols and Eutric Leptosols) of mixed beech forest (Beech- Hornbeam and Beech- Maple). Soil was randomly sampled from 0–10 cm layer (plant litter removed), 90 soil samples were taken. Cₘᵢc determined by the fumigation-extraction method and MR by closed bottle method. Soil Cₒᵣg, Nₜₒₜ and pH were measured. There are significant differences between the soil types concerning the Cₘᵢc content and MR. These parameters were highest in Chromic Cambisols following Chromic Luvisols, while the lowest were in Eutric Leptosols. A similar trend of Cₒᵣg and Nₜₒₜ was observed in studied soils. Two-way ANOVA indicated that soil type and forest type have significantly effect on the most soil characteristics. Chromic Cambisols shows a productive soil due to have the maximum Cₘᵢc, MR, Cₒᵣg and Nₜₒₜ. In Cambisols under Beech- Maple forest the Cₘᵢc value and soil C/N ratio were higher compared to Beech-Hornbeam (19.5 and 4.1 mg C g–¹, and 16.3 and 3.3, respectively). This fact might be indicated that Maple litter had more easy decomposable organic compounds than Hornbeam. According to regression analysis, 89 and 68 percentage of Cₘᵢc variability could explain by soil Cₒᵣg and Nₜₒₜ respectively.