Nitrogen addition reduces soil bacterial richness, while phosphorus addition alters community composition in an old-growth N-rich tropical forest in southern China

Hui, Wu; Liu, Shirong; Zhang, Xiao; Mao, Qigui; Li, Xiangzhen; You, Yeming; Wang, Jingxin; Zheng, Mianhai; Zhang, Wei; Lu, Xiankai

doi:10.1016/j.soilbio.2018.08.022

Cited by 106 publications

(81 citation statements)

References 74 publications

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“…Furthermore, N addition reduced the fungi:bacteria ratio, reduced the relative abundances of arbuscular mycorrhizal fungi and Gram‐negative bacteria and increased the abundance of Gram‐positive bacteria (Zhang et al, ). Continuous N addition promoted soil acidification, which could also directly or indirectly affect soil microbial diversity and community composition (Wang et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…N addition often initially stimulates plant growth and thus C inputs to soil, resulting in a significant increase in root respiration and consequently in soil CO 2 emissions (Lu, Zhou, et al, ). Over the long term, the increase in soil CO 2 emissions may gradually disappear due to declining soil bacterial diversity and decreased soil pH (Phoenix et al, ; Treseder, ; Wang et al, ). The negative effect of N addition on microbial respiration increased with the N application experimental duration, but N addition did not have a positive effect on root respiration (Zhang et al, ).…”

Section: Discussionmentioning

confidence: 99%

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Soil GHG fluxes are altered by N deposition: New data indicate lower N stimulation of the N₂O flux and greater stimulation of the calculated C pools

Deng

Huang

Kim

et al. 2020

Global Change Biology

141

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The effects of nitrogen (N) deposition on soil organic carbon (C) and greenhouse gas (GHG) emissions in terrestrial ecosystems are the main drivers affecting GHG budgets under global climate change. Although many studies have been conducted on this topic, we still have little understanding of how N deposition affects soil C pools and GHG budgets at the global scale. We synthesized a comprehensive dataset of 275 sites from multiple terrestrial ecosystems around the world and quantified the responses of the global soil C pool and GHG fluxes induced by N enrichment. The results showed that the soil organic C concentration and the soil CO2, CH4 and N2O emissions increased by an average of 3.7%, 0.3%, 24.3% and 91.3% under N enrichment, respectively, and that the soil CH4 uptake decreased by 6.0%. Furthermore, the percentage increase in N2O emissions (91.3%) was two times lower than that (215%) reported by Liu and Greaver (Ecology Letters, 2009, 12:1103–1117). There was also greater stimulation of soil C pools (15.70 kg C ha−1 year−1 per kg N ha−1 year−1) than previously reported under N deposition globally. The global N deposition results showed that croplands were the largest GHG sources (calculated as CO2 equivalents), followed by wetlands. However, forests and grasslands were two important GHG sinks. Globally, N deposition increased the terrestrial soil C sink by 6.34 Pg CO2/year. It also increased net soil GHG emissions by 10.20 Pg CO2‐Geq (CO2 equivalents)/year. Therefore, N deposition not only increased the size of the soil C pool but also increased global GHG emissions, as calculated by the global warming potential approach.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Soil GHG fluxes are altered by N deposition: New data indicate lower N stimulation of the N₂O flux and greater stimulation of the calculated C pools

Deng

Huang

Kim

et al. 2020

Global Change Biology

141

View full text Add to dashboard Cite

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“…Dębska et al [27] pointed out that the use of a bio-fertilizer that increased the formation of permanent humus compounds provided evidence of an increase in SOM stability. Furthermore, the added N hurt the richness of soil bacteria, which likely reduced SOC mineralization and increased soil C sequestration [28]. Long-term nutrient enrichment might have shifted the mechanisms of C stabilization from physical protection to chemical stabilization via shifting microbial community composition [29].…”

Section: Wave Numbers (Cm −1 )mentioning

confidence: 99%

Influences of Nitrogen Application Levels on Properties of Humic Acids in Chernozem Amended with Different Types of Organic Materials

et al. 2019

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The objective of this study was to examine the structure changes in humic acids (HAs) in Chernozem after the application of different types of organic materials (OMs) under an indoor simulation condition for plastic mulched drip irrigation, measured with Fourier transform infrared (FTIR) spectroscopy. The biotechnological extract of fulvic acid (BFA), decomposed sheep manure (M), corn straw pellets (Ps) and corn straw powder (Pr) were used as the four OMs for testing, and they were applied to Chernozem at the same amount of actual material; three nitrogen (N) levels (no N, low N, and high N supply) were applied to each type of (OMs), separately. The total culture period was set to 90 days and soil sampling was taken at 0, 30, 60 and 90 days, respectively. The results showed that different types of OMs exerted different effects on Chernozem based on the FTIR spectra of HAs. The application of M combined with high N supply was the best way to fertilize Chernozem, under which the H-bonded OH groups and aromatic compounds were enhanced, resulting in increased soil carbon (C) sequestration; while the carbohydrates in HAs was easily consumed as microbial energy substance. The HAs from the Chernozem amended with BFA became more aliphatic, simpler and younger. High N supply was beneficial for increasing the complexity of HAs from Chernozem amended with Ps, but was not conducive to soil cation retention. Within a short time of incubation, the application of Pr combined with high N was detrimental to the C sequestration in Chernozem, and inhibited the consumption of carbohydrates by microorganisms.

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“…Several studies have revealed that bacterial diversity declines with the rate of N addition (Kaspari et al 2017, Wang et al 2018b, while a reduction in oligotrophic bacteria was often concomitantly found with decreased enzyme activity related to cellulose breakdown. This further supports that the N addition negatively affects microbial SOM (soil organic matter) decomposition.…”

Section: Introductionmentioning

confidence: 99%

“…As the result of high N deposition, P limitation may occur in soil bacterial communities. The addition of P could partially mitigate the negative effects of N ad-dition on Shannon's indices (Wang et al 2018b), as well as the biomass of soil bacteria (Cui et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Response of soil bacterial communities to nitrogen and phosphorus additions in an age-sequence of subtropical forests

Dai¹,

Wang²,

Chen³

et al. 2021

iForest

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With global nitrogen (N) deposition continuously increasing, few reports exist describing how soil bacteria respond at the molecular level to long-term addition of excess N in variously aged forests. To reveal the responses of soil bacteria to the elevated N, an experiment was conducted with a chronic nutrient addition within differently aged stands (46-, 78-, and 200-years-old) in the northern subtropical China since 2011, including three treatments, CK (no N nor phosphorus (P) additions), N treatment (N, 100 kg N ha-1), and N with P (N+P, 100 kg N ha-1 + 50 kg P ha-1) to examine potential P limitation under N deposition. Metagenomic sequencing was used to examine the snapshot responses of soil bacterial communities. Soil moisture and texture, ammonium, nitrate, SOC (soil organic carbon), TN (soil total nitrogen), TP (total phosphorus), DOC (dissolved organic carbon), DON (dissolved organic nitrogen) were measured to explain the influence mechanism of forest age and fertilization on changes of microbial community. Following N addition, soil bacterial community diversity and most dominant phyla increased, but they showed a decrease with increasing stand age. The effects of fertilization on the same taxa were variable across forest ages. Soil bacterial community responded differently in 7-year fertilization, with distinct shift in 46-year-old forest and adaptability to long-term N addition in the 200-year-old forest. Soil texture and moisture, DOC, DON, pH, SOC/TN and TP were significantly correlated with bacterial community across stand ages, while N fertilization affected the bacterial community mostly via inducing soil moisture, NO3-N, DOC and pH in the 46-year-old forest, whose effects decreased with increasing stand age. Our results suggest that due to the variation of soil physicochemical properties among forest ages, soil bacterial communities are more stable and resilient to N deposition with increasing the age of stands. Soil bacterial communities might not encounter P limitation following the long-term addition of N in the subtropics.

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Nitrogen addition reduces soil bacterial richness, while phosphorus addition alters community composition in an old-growth N-rich tropical forest in southern China

Cited by 106 publications

References 74 publications

Soil GHG fluxes are altered by N deposition: New data indicate lower N stimulation of the N₂O flux and greater stimulation of the calculated C pools

Soil GHG fluxes are altered by N deposition: New data indicate lower N stimulation of the N₂O flux and greater stimulation of the calculated C pools

Influences of Nitrogen Application Levels on Properties of Humic Acids in Chernozem Amended with Different Types of Organic Materials

Response of soil bacterial communities to nitrogen and phosphorus additions in an age-sequence of subtropical forests

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Nitrogen addition reduces soil bacterial richness, while phosphorus addition alters community composition in an old-growth N-rich tropical forest in southern China

Cited by 106 publications

References 74 publications

Soil GHG fluxes are altered by N deposition: New data indicate lower N stimulation of the N2O flux and greater stimulation of the calculated C pools

Soil GHG fluxes are altered by N deposition: New data indicate lower N stimulation of the N2O flux and greater stimulation of the calculated C pools

Influences of Nitrogen Application Levels on Properties of Humic Acids in Chernozem Amended with Different Types of Organic Materials

Response of soil bacterial communities to nitrogen and phosphorus additions in an age-sequence of subtropical forests

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Soil GHG fluxes are altered by N deposition: New data indicate lower N stimulation of the N₂O flux and greater stimulation of the calculated C pools

Soil GHG fluxes are altered by N deposition: New data indicate lower N stimulation of the N₂O flux and greater stimulation of the calculated C pools