Responses of soil extracellular enzyme activities to simulated erosion and fertilization in the Chinese black soil region

• DOI: 10.5194/egusphere-egu25-9738
• Publication Date: 2025-03-14T22:04:43Z
• Authors: Yangyang Li; Hongxiang Zhao; Zhiqiang Wang; Gema Guzmán
• Keywords: Soil enzyme

Soil extracellular enzyme activities play a crucial role in soil organic matter decomposition and nutrient cycling. erosion is major threat to health sustainable crop productivity worldwide, the use of chemical fertilizers an important management practice combat degradation increase yields. How respond combined fertilization, whether these can be used as indicators under erosion, remains unclear. Based on long-term field simulated experiment (2005-2022) black region northeast China, 12 [ including 5 C-acquiring enzymes: β-1,4-glucosidase (BG), β-D-cellobiohydrolase (CBH), β-xylosidases (BX), α-glycosidase (α-GC) invertase; 3 N-acquiring β-1,4-N-acetylglucosaminidase (NAG), leucine amino peptidase (LAP) urease; 1 P-acquiring enzyme: acid phosphatase (ACP); oxidative catalase, phenol oxidase (POX), peroxidase (POD)] relevant physicochemical microbial properties were carried out along gradient both unfertilized fertilized conditions during fallow season. The results showed that: (1) Simulated significantly decreased invertase, urease, ACP, POD, had no effect other 8 enzymes. Long-term fertilization increased urease NAG POD activities. No interactions between found for all measured (2) invertase mainly caused by decrease (SOM), or not. Decreased ACP activity was attributed SOM but pH BD fertilization. determined alkali-hydrolyzed N (AN) none explain changes (3) positively correlated with multiyear average yield across conditions, only highlight that potential erosion-induced degradation, fertilizer application improve degraded soils partly increasing yield.