Effects of nitrogen and phosphorus additions on CH4 flux in wet meadow of Qinghai-Tibet Plateau

Wu, Jiangqi; Lü, Yanhua; Wang, Haiyan; Li, Guang

doi:10.1016/j.scitotenv.2023.163448

Cited by 7 publications

(2 citation statements)

References 53 publications

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“…In May 2019, we selected an area with a terrain relatively, and vegetation was evenly distributed as the test area. Based on previous studies, the current background value of nitrogen deposition in this area is 5.0 kg N ha − 1 yr − 1 (Wu et al, 2023). It is anticipated that the rate of nitrogen deposition will increase by 2-3 times in the future.…”

Section: Experimental Designmentioning

confidence: 98%

Response of soil nitrogen pool to nitrogen and phosphorus addition in the wet meadow of the Qinghai-Tibet Plateau

LU,

Li,

et al. 2024

Preprint

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Background and aims The soil nitrogen (N) conversion process is an important part of the N cycle in wetland ecosystems, which regulates the content of soil available N and determines the retention status of soil N. N deposition and phosphorus (P) input caused by human activities will change the soil N pool, thereby affecting the soil function and conversion process. However, the responses of soil nitrogen pools to N and P addition in the QTP remain unknown. Methods In this study, an experiment was carried out for two years in wetlands situated on the Qinghai-Tibet Plateau. We analyzed the effects of N and P additions on soil nitrogen pool (i.e., blank control (CK), N addition (15 kg N ha− 1 yr− 1, N15), P addition (15 kg P ha− 1 yr− 1, P15), and NP co-addition (15 kg NP ha− 1 yr− 1, N15P15)), and discussed the main driving factors. Results The results showed that N and P addition significantly increased the contents of total nitrogen (TN) and ammonia nitrogen (NH4+-N) in 0-40cm soil layer, and decreased the contents of soil dissolved organic nitrogen (DON), but had no significant effect on the contents of soil microbial biomass nitrogen (MBN). The nitrate nitrogen (NO3−-N) content decreased under the N15 addition, and the TN storage was the highest under the P15 addition. Under each treatment, the surface soil (0-10cm) was more sensitive to N and P addition, while the deep soil was relatively stable. Redundancy analysis (RDA) showed that soil organic carbon (Explanation = 40.80%), soil density (Explanation = 8.70%), and carbon-to-nitrogen ratio (Explanation = 8.40%) were the main environmental factors affecting the content of each N fraction under the N and P addition. Conclusion N and P addition would affect the stability and transformation of wetland soil nitrogen pool, and the nitrogen transformation process was mainly regulated by soil physicochemical properties.

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Section: Experimental Designmentioning

confidence: 98%

Response of soil nitrogen pool to nitrogen and phosphorus addition in the wet meadow of the Qinghai-Tibet Plateau

LU,

Li,

et al. 2024

Preprint

Self Cite

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“…Montane peatlands are huge nitrogen (N) pools, but not a significant source of N 2 O emissions due to phosphorus (P) limitations and low temperature [2][3][4][5][6][7]. However, the increase in P deposition and continuous warming caused by global changes will change the current status of peatlands, which may increase the possibility of peatlands being a hotspot of N 2 O emissions [8][9][10]. Nevertheless, the underlying mechanism that influences the response of N 2 O emissions and biotic/abiotic factors in peatlands to the interaction of P addition and warming has rarely been studied.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Warming-Amplified Phosphorus Addition on a Peatland’s N2O Emissions

Yi,

Lu,

Chen

et al. 2023

Agronomy

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Natural montane peatlands are generally not a significant source of nitrous oxide (N2O) due to environment limitations, including phosphorus (P) scarcity and temperature lowness. Phosphorus enrichment and warming caused by global change are altering these limitations, and are likely to increase the source function of N2O. However, the combined effects of P addition and warming on N2O fluxes and biotic/abiotic factors in peatlands are still uncertain. To address this, we investigated the long-term (12 yrs) effects of P addition (5 and 10 kg ha−1 yr−1) and its interaction with warming on N2O fluxes in a peatland. The results showed that although long-term P addition did not significantly affect the source/sink function of N2O in the peatland, it stimulated enzyme activities and promoted peat decomposition. However, warming amplified the effect of P addition to increase N2O emissions by stimulating enzyme activities and changing soil stoichiometry, so even turned the peatland into a significant source of N2O with an emission of approximate 100 g m−2 during the growing season. Our study suggests that P enrichment against the current background of global warming will enhance the possibility of strong N2O emissions in montane peatlands, which may increase the risk that global warming will be further aggravated.

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Global Systematic Review with Meta-analysis Shows Responses of Forest Greenhouse Gas Emissions under Single Nitrogen, Single Phosphorus, or Interactive Nitrogen and Phosphorus Addition

Wang,

Guo,

Cui

et al. 2024

J Soil Sci Plant Nutr

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Effects of nitrogen and phosphorus additions on CH4 flux in wet meadow of Qinghai-Tibet Plateau

Cited by 7 publications

References 53 publications

Response of soil nitrogen pool to nitrogen and phosphorus addition in the wet meadow of the Qinghai-Tibet Plateau

Response of soil nitrogen pool to nitrogen and phosphorus addition in the wet meadow of the Qinghai-Tibet Plateau

The Effect of Warming-Amplified Phosphorus Addition on a Peatland’s N2O Emissions

Global Systematic Review with Meta-analysis Shows Responses of Forest Greenhouse Gas Emissions under Single Nitrogen, Single Phosphorus, or Interactive Nitrogen and Phosphorus Addition

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