Response and feedback of C mineralization to P availability driven by soil microorganisms

Jing, Zhongwang; Chen, Ruirui; Wei, Shiping; Feng, Youzhi; Zhang, Jiabao; Lin, Xiangui

doi:10.1016/j.soilbio.2016.11.014

Cited by 101 publications

(53 citation statements)

References 60 publications

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“…With C addition, CO 2 emission rate increased dramatically and showed a pulse response, whereas a monotonic declining pattern was observed for all soils without C addition (Figures 1 and 3). This supports the idea that the microorganisms in the soils collected from the field might have limited access to readily available C. The pulse response pattern is common in response to C substrate addition (Cleveland et al, 2002;Kuzyakov, 2010;Tian et al, 2014), although some incubation studies report a decline of CO 2 emission rates due to rapid metabolism of the labile C substrate (e.g., Bradley-Cook, Petrenko, Friedland, & Viginia, 2016;Jing et al, 2017;Tian et al, 2014;Zhou, Hui, & Shen, 2014). Increasing emissions with C addition could indicate the growth of the microbial population, decomposition of the added labile substrate and/or increasing microbial activity through the priming (Blagodatskaya & Kuzyakov, 2008;Blagodatsky et al 2010;Mehnaz et al 2019).…”

Section: Discussionsupporting

confidence: 63%

“…Increases in bacterial gene copy numbers were also observed with CNP additions, but the shift in the fungal to bacterial ratio indicates a distinct response on the part of fungi. The dramatic increase in CO 2 emission rates was due to the addition of the readily available C substrate, glucose, which stimulated microbial metabolism (Jia et al, 2013;Jing et al, 2017) and tended to increase the abundance of fungi and the fungal to bacterial ratio, but only when additional nutrients were supplied. This implies that the addition of C, N and P together enhanced microbial reproduction.…”

Section: Discussionmentioning

confidence: 99%

“…Microorganisms serve as dominant "metabolic machines" that drive ecosystem functions such as soil C decomposition (Falkowski, Fenchel, & Delong, 2008). Nutrient availability may regulate microbial physiology and activity and eventually influence ecosystem C cycling (Jing et al, 2017;Mackenzie, Ver, & Lerman, 2002). However, although many fertilization experiments have been conducted in the field, there are limited studies on soil microbial CO 2 emissions in response to P addition (Cleveland, Townsend, & Schmidt, 2002;Qian, He, & Wang, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Phosphorus rather than nitrogen enhances CO₂ emissions in tropical forest soils: Evidence from a laboratory incubation study

Hui

Porter

Phillips

et al. 2020

European J Soil Science

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Ecosystem functional responses such as soil CO 2 emissions are constrained by microclimate, available carbon (C) substrates and their effects upon microbial activity. In tropical forests, phosphorus (P) is often considered as a limiting factor for plant growth, but it is still not clear whether P constrains microbial CO 2 emissions from soils. In this study, we incubated seven tropical forest soils from Brazil and Puerto Rico with different nutrient addition treatments (no addition, Control; C, nitrogen (N) or P addition only; and combined C, N and P addition (CNP)). Cumulative soil CO 2 emissions were fit with a Gompertz model to estimate potential maximum cumulative soil CO 2 emission (C m ) and the rate of change of soil C decomposition (k). Quantitative polymerase chain reaction (qPCR) was conducted to quantify microbial biomass as bacteria and fungi. Results showed that P addition alone or in combination with C and N enhanced C m , whereas N addition usually reduced C m , and neither N nor P affected microbial biomass. Additions of CNP enhanced k, increased microbial abundances and altered fungal to bacterial ratios towards higher fungal abundance. Additions of CNP, however, tended to reduce C m for most soils when compared to C additions alone, suggesting that microbial growth associated with nutrient additions may have occurred at the expense of C decomposition. Overall, this study demonstrates that soil CO 2 emission is more limited by P than N in tropical forest soils and those effects were stronger in soils low in P. Highlights• A laboratory incubation study was conducted with nitrogen, phosphorus or carbon addition to tropical forest soils. Soil CO 2 emission was fitted with a Gompertz model and soil microbial abundance was quantified using qPCR. Phosphorus addition increased model parameters C m and soil CO 2 emission, particularly in the Puerto Rico soils. Soil CO 2 emission was more limited by phosphorus than nitrogen in tropical forest soils.

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Section: Discussionsupporting

confidence: 63%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phosphorus rather than nitrogen enhances CO₂ emissions in tropical forest soils: Evidence from a laboratory incubation study

Hui

Porter

Phillips

et al. 2020

European J Soil Science

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“…In previous investigations, we found that soils with balanced fertilizations typically have higher carbon sequestration efficiency than that of P-deficient treated soils ( Zheng et al, 2009 ). More recently, we found that P-deficiency decreases the retention of exogenous labile C in soil through increases in soil microbial respiration ( Jing et al, 2017 ). Therefore, under P-deficient fertilizations, a significant amount of C is readily lost as CO 2 through respiration, resulting in a lower percentage of C retained as biomass in soil.…”

Section: Discussionmentioning

confidence: 99%

Balanced Fertilization Decreases Environmental Filtering on Soil Bacterial Community Assemblage in North China

et al. 2017

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Although increasing evidences have emerged for responses of soil microorganisms to fertilizations, the knowledge regarding community assemblages that cause variations in composition is still lacking, as well as the possible feedback to soil fertility. Phylogenetic conservatism of species indicates their similar environmental preferences and/or function traits and phylogenetic signals further can infer community assemblages and influenced ecological processes. Here, we calculated the mean pairwise phylogenetic distance and nearest relative index, characterizing phylogenetic signal and the undergone ecological process to evaluate the community assembly of soil bacterial phylotypes in 20-year fertilized soils. The bacterial community assembly is structured by environmental filtering, regardless of fertilization regime. Soil phosphorous (P) availability imposes selection on community assemblage and influences their community turnover among fertilizations. When P nutrient lacks, the effect of environmental filtering becomes stronger, hence bacterial functional traits become more coherent; this process results into increased intraspecific interactions characterized by co-occurrence network analysis. In contrast, when P nutrient becomes abundant, the environmental selection is mitigated; function traits are evened. This process reduces intraspecific interactions and increases carbon sequestration efficiency, which is finally of great favor to the increases in soil fertility. This study has made the first attempt, at the bacterial level, to understand how fertilization affects agroecosystems. When more phylogenetic information on how nutrient cycling-related microbes respond to fertilization becomes available, the systematic knowledge will eventually provide guidance to optimal fertilization strategies.

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“…Wang et al, 2015a), and, given the highly interconnected relationship between C and N, this is unsurprising. In addition, potential priming effects have also been identified for other nutrients such as P (Jing et al, 2017;Kuzyakova et al, 2000;Nottingham et al, 2016Nottingham et al, , 2012 and S (Chapman, 1997;Lefroy et al, 1994;O'Donnell et al, 1994), however, these have been covered to a far less extent in since N is a more commonly limiting nutrient in agricultural ecosystems.…”

Section: N-mining Theorymentioning

confidence: 99%

Soil organic matter turnover over decadal to millennial timescales

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Response and feedback of C mineralization to P availability driven by soil microorganisms

Cited by 101 publications

References 60 publications

Phosphorus rather than nitrogen enhances CO₂ emissions in tropical forest soils: Evidence from a laboratory incubation study

Phosphorus rather than nitrogen enhances CO₂ emissions in tropical forest soils: Evidence from a laboratory incubation study

Balanced Fertilization Decreases Environmental Filtering on Soil Bacterial Community Assemblage in North China

Soil organic matter turnover over decadal to millennial timescales

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Response and feedback of C mineralization to P availability driven by soil microorganisms

Cited by 101 publications

References 60 publications

Phosphorus rather than nitrogen enhances CO2 emissions in tropical forest soils: Evidence from a laboratory incubation study

Phosphorus rather than nitrogen enhances CO2 emissions in tropical forest soils: Evidence from a laboratory incubation study

Balanced Fertilization Decreases Environmental Filtering on Soil Bacterial Community Assemblage in North China

Soil organic matter turnover over decadal to millennial timescales

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Phosphorus rather than nitrogen enhances CO₂ emissions in tropical forest soils: Evidence from a laboratory incubation study

Phosphorus rather than nitrogen enhances CO₂ emissions in tropical forest soils: Evidence from a laboratory incubation study