Dynamics of carbon and nitrogen in an extreme alkaline saline soil: A review

摘要: Abstract The soil of the former lake Texcoco is an ‘extreme’ alkaline saline with pH > 10 and electrolytic conductivity (EC) > 150 dS m−1. These conditions have created a unique environment. Application wastewater sludge to showed that large amounts NH4+ were immobilized, NO3− was reduced aerobically, NO2− formed mineralization organic material in inhibited. A series experiments initiated study processes inhibited decomposition affected dynamics mineral N. EC pH easily decomposable such as glucose maize, although cellulolytic activity observed 9.8 32.7 dS m−1. high favoured NH3 volatilization approximately 50 mg N kg−1 within day similar amount could be fixed on matrix due dispersed minerals their volcanic origin. Soil microorganisms immobilized when added excess what required for metabolic activity. Removal from amended not by 100% O2 indicating contribution denitrification assimilatory reduction minimal while formation 0.1% acetylene, known inhibit nitrification. Additionally, the reduction glucose-amended followed increase NH4+, which denitrification. It concluded result aerobic reduction. A phylogenetic analysis archaeal community some clones identified capable reducing aerobically added. A diversity the bacterial dissimilatory respiratory nitrate-reducing communities indicated bacteria contributed process.