Microorganisms are key actors in soil quality.However,their activity is influenced by various factors including agricultural practices.This study aimed to assess the effects of 4 agroecological practices on soil micro...Microorganisms are key actors in soil quality.However,their activity is influenced by various factors including agricultural practices.This study aimed to assess the effects of 4 agroecological practices on soil microbiological activity in the Sudano-Sahelian area of Burkina Faso.These practices involved(a)the use of organic matter(OM)spread over a plot,with and without micro-dose mineral fertilization and(b)the localized application of organic manure in planting pits dug into hard pan land(zaï),with and without cereal-legume rotation.Microbial biomass(MB)by fumigation-extraction and soil respiration by incubation-extraction were measured on 40 soil samples,taken at 0-10 cm depth.The results indicated higher cumulative values of carbon from respiration on plots with generalized application of OM,with and without mineral fertilizers(113 and 111 mg C-CO_(2)/kg soil respectively),than on plots with localized application,with and without cereal-legume rotation(72.9 and 98 mg C-CO_(2)/kg soil respectively).MB follows the same trend as soil respiration with lower values(21.9 to 50.9 mg C/kg soil respectively).Generalized application of OM with or without mineral fertilizers was more favorable to soil microbial activity.展开更多
文摘Microorganisms are key actors in soil quality.However,their activity is influenced by various factors including agricultural practices.This study aimed to assess the effects of 4 agroecological practices on soil microbiological activity in the Sudano-Sahelian area of Burkina Faso.These practices involved(a)the use of organic matter(OM)spread over a plot,with and without micro-dose mineral fertilization and(b)the localized application of organic manure in planting pits dug into hard pan land(zaï),with and without cereal-legume rotation.Microbial biomass(MB)by fumigation-extraction and soil respiration by incubation-extraction were measured on 40 soil samples,taken at 0-10 cm depth.The results indicated higher cumulative values of carbon from respiration on plots with generalized application of OM,with and without mineral fertilizers(113 and 111 mg C-CO_(2)/kg soil respectively),than on plots with localized application,with and without cereal-legume rotation(72.9 and 98 mg C-CO_(2)/kg soil respectively).MB follows the same trend as soil respiration with lower values(21.9 to 50.9 mg C/kg soil respectively).Generalized application of OM with or without mineral fertilizers was more favorable to soil microbial activity.
