In addition, the concentration of P in decomposing litter showed an overall trend of decline followed by rise, and the P concentration in the nutrient enrichment treatment showed more violent changes than that in the nutrient control treatment ( Fig 2c and 2f ).
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The decomposition process and nutrient release of invasive plant litter regulated by nutrient enrichment and water level change.
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The nutrient release of decomposing litter including C and N increased in the same trend over the study period, while the P release showed a trend of increasing first and then decreasing ( Fig 3 ).