ArticleFrontiers in plant science2026
Nitrogen deposition significantly alters the nonadditive effects of mixed litter decomposition on soil bio and chemical properties.
Article in Frontiers in plant science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: Nitrogen deposition has been confirmed to significantly affect mixed decomposition of litter. However, it remains unclear whether it alters the nonadditive effects (NAEs) of this process on soil bio and chemical properties and whether such alterations are mediated by the diversity and species composition of litter mixtures. Methods: In this study, a decomposition experiment was conducted with seven litter mixtures composed of four dominant plant species in Results: The main results are as follows: (1) Generally, nitrogen deposition altered the NAEs of mixed litter on soil organic carbon and available phosphorus replenishment toward synergistic effects (including weakening antagonistic effects, enhancing synergistic effects, and their intermediate states) and shifted its effects on soil available nitrogen replenishment toward antagonistic effects, whereas no consistent pattern was observed in the alterations of its effects on soil acidification. (2) Nitrogen deposition shifted the NAEs of mixed litter on stimulating soil sucrase and urease activities toward antagonistic and synergistic effects, respectively. Its effects on catalase activity shifted toward antagonism under low nitrogen deposition rates but remained additive under high nitrogen deposition rates. In contrast, no consistent regulatory pattern was detected for its effects on alkaline phosphatase activity. (3) Under the conditions of high chemical diversity (richness and dispersion) of mixed litter and the presence of Conclusion: Nitrogen deposition alters the nonadditive effects of mixed litter decomposition on soil properties and enzyme activities, with these changes regulated by litter diversity and species composition.
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