Comparative effects of the recovery from sulfuric and nitric acid rain on the soil enzyme activities and metabolic functions of soil microbial communities.

摘要: Acid rain (AR) is a serious issue in China, particularly the Yangtze River Delta region where economy has undergone rapid development. Over last few years, composition of acid gradually changed from sulfuric (SAR) to nitric (NAR) due controls on SO2 emissions, but increased NOx emissions. These changes have made ecosystems more complex. For this study, we halted AR treatments Quercus acutissima forest plots that had received simulated for one year and monitored them following February November. We investigated their soil resident enzyme microbial metabolic activities, as well community functional diversity. The results revealed negatively affected both activity diversity; however, managed recover over time, once were stopped. During treatment recovery periods, four main categories (carbohydrates, carboxylic acids, amino polymers) dominantly utilized. utilization pyruvic acid, which was by treatments, d-mannitol tween 80, accounted peak values C substrate groups during period. Finally, activities enzymes recorded recovery, closely related six groups. Our suggested soils cessation NAR stress than SAR. Further, short-term could be easily treated transformation SAR region. might also enrich basic data relating post-AR environment, while having significance toward guiding further studies AR.