CO2 efflux and microbial activities in undisturbed soil columns in different nitrogen management

E. Molnár, T. Szili-Kovács, I. Villányi, M. Knáb, Á. Bálint, K. Kristóf and G. Heltai
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E. Molnár: Szent István University, Gödöllő, Hungary
T. Szili-Kovács: Centre for Agricultural Research of the Hungarian Academy of Sciences, Budapest, Hungary
I. Villányi: Centre for Agricultural Research of the Hungarian Academy of Sciences, Budapest, Hungary
M. Knáb: Centre for Agricultural Research of the Hungarian Academy of Sciences, Budapest, Hungary
Á. Bálint: Sándor Rejtő Faculty of Light Industry and Environmental Protection Engineering, Óbuda University, Budapest, Hungary
K. Kristóf: Szent István University, Gödöllő, Hungary
G. Heltai: Szent István University, Gödöllő, Hungary

Plant, Soil and Environment, 2016, vol. 62, issue 9, 402-407

Abstract: The surface carbon dioxide (CO2) fluxes together with the soil microbial biomass and activity in undisturbed soil columns were studied in three growing seasons. Soil columns had six treatments: (1) control without plants; (2) mineral fertilized without plants; (3) no fertilizer and maize plants; (4) mineral fertilized and maize plants; (5) manure and maize plants; (6) mineral fertilized plus manure and maize plants. Soil microbial biomass was measured by substrate-induced respiration (SIR) and microbial activity as fluorescein-diacetate hydrolysing activity (FDA). Treatments had a significant effect (P < 0.001) on CO2 fluxes, SIR and FDA. The presence of maize increased CO2 efflux, SIR and FDA compared to unplanted column. Fertilizer + manure treatment resulted in the greatest plant biomass and the greatest CO2 efflux. Significant correlation (r = 0.680; r = 0.586 in two consecutive years) between SIR and FDA was found.

Keywords: farmyard manure; root respiration; soil carbon budget; soil respiration; soil temperature (search for similar items in EconPapers)
Date: 2016
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:62:y:2016:i:9:id:216-2016-pse

DOI: 10.17221/216/2016-PSE

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