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

Plant, Soil and Environment

G. Heltai¹  T. Szili-Kovács¹  I. Villányi¹  K. Kristóf¹  M. Knáb¹  Á. Bálint¹  E. Molnár¹ 

关键词: farmyard manure;    root respiration;    soil carbon budget;    soil respiration;    soil temperature;   

DOI  :  10.17221/216/2016-PSE

学科分类：农业科学（综合）

来源: Czech Academy of Agricultural Sciences

【 摘 要 】

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. 

【 授权许可】

Unknown