Seasonal variation of microbial activity in soil and forest floor under three different fir plantations

Authors : Serdar AKBURAK

Pages : 109-122

Doi:10.31195/ejejfs.695673

View : 18 | Download : 14

Publication Date : 2020-06-15

Article Type : Research Paper

Abstract :Microbil activity is one of the important process for biochemical cycles in soil and forest floor of ecosystems. Because, , the carbon dioxide and nutrients needed by plants are released during the microbial activity. In this study, we were investigated releationships between environmental factors insert ignore into journalissuearticles values(mositure, temperature, pH, electric conductivity, C, N, Na, Ca, Mg, K, P); and seasonal variations of microbal respiration, microbial biomass-C and metabolic quotient insert ignore into journalissuearticles values(qCO2); in the forest floor and soil insert ignore into journalissuearticles values(0-5cm); under three adjacent Abies plantation plots insert ignore into journalissuearticles values(Abies nordmanniana ssp. bornmuelleriana Mattf. insert ignore into journalissuearticles values(Ab);, Abies cilicica Carr. insert ignore into journalissuearticles values(Ac); and Abies nordmanniana ssp. nordmanniana Mattf insert ignore into journalissuearticles values(An);); in Atatürk Arboretum located in Istanbul-Turkey. Sampling was carried out by collecting bimonthly insert ignore into journalissuearticles values(from May-2012 to March-2013); both soil insert ignore into journalissuearticles values(54 sample); and forest floor insert ignore into journalissuearticles values(54 sample); samples within each species. According to the results of the study, soil microbial respiration insert ignore into journalissuearticles values(SMR); has significantly lower value in Ab plot. Although SMR and soil microbial biomass-C insert ignore into journalissuearticles values(SMBC); were correlated with moisture and temperature in An plot, they were correlated with nutrients in other plots. In general, an increase in soil respiration rates was showed in autumn and early spring. Forest floor microbial respiration insert ignore into journalissuearticles values(FFMR);, microbial biomass-C insert ignore into journalissuearticles values(FFMBC); and metabolic quotent insert ignore into journalissuearticles values(qCO2); did not differ among the plots. The measured FFMR, FFMBC and qCO2 parameters were lower in autumn than spring. Forest floor microbial parameters were drived by the variation of nutrients amounts. As a result, microbial processes in both soil and forest floor changed with the effect of different factors although there was no clear difference among the plots,
Keywords : Microbial respiration, Microbial biomass C, qCO2