Nitrogen additions reduce rhizospheric and heterotrophic respiration in a subtropical evergreen broad-leaved forest

Peng, Yong; Chen, Guantao; Li, Shun; Hu, Hongling; Ting-xing, HU; Liu, Li; Tang, Yi; Tu, Lihua

doi:10.1007/s11104-018-3751-1

Cited by 19 publications

(11 citation statements)

References 69 publications

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“…As intended, simulated N deposition significantly decreased soil respiration, and this was most pronounced in the M and H treatments ( Fig 3 and Table 1 ), which induced decreases in CO 2 transfer from the soil to the atmosphere. Recently, a study conducted in a secondary evergreen broad-leaved forest in the rainy area of western China also found that N deposition (150 kg N ha −1 ·a −1 ) significantly decreased soil respiration [ 22 , 52 ]. These findings agree with several studies that revealed that N deposition leads to short-term decreases in soil respiration [ 26 – 28 , 53 ]; however, these results are contradictory to the results of other studies [ 18 , 23 , 54 – 56 ].…”

Section: Discussionmentioning

confidence: 99%

“…These findings agree with several studies that revealed that N deposition leads to short-term decreases in soil respiration [ 26 – 28 , 53 ]; however, these results are contradictory to the results of other studies [ 18 , 23 , 54 – 56 ]. Generally, soil respiration comprises both heterotrophic respiration from fauna and free-living soil microorganisms (actinomycetes, bacteria, fungi and protozoans) and rhizosphere respiration from mycorrhizae, roots and other microorganisms associated with root systems [ 26 , 52 , 57 , 58 ]. Soil respiration can also be roughly divided into microbial respiration and root respiration on the basis of CO 2 emissions [ 23 , 58 ].…”

Section: Discussionmentioning

confidence: 99%

“…In general, plant root respiration contributes a large proportion to soil respiration. Previous studies found that fine root biomass is significantly and positively correlated with soil respiration [ 52 , 59 , 60 ]. Similar to the results of this study, many previous studies found that N deposition can decrease root biomass, which leads to less input from belowground roots to the soil [ 22 , 27 , 28 , 61 ].…”

Section: Discussionmentioning

confidence: 99%

“…Second, N deposition may reduce heterotrophic respiration from the microbial community. Soil microbial respiration depends on soil temperature, moisture, microbial biomass and extracellular enzyme activities, as well as substrate quality and quantity [ 18 , 27 , 28 , 52 ]. In our study, we found that N deposition significantly decreased the pH ( Fig 6D ).…”

Section: Discussionmentioning

confidence: 99%

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Simulated nitrogen deposition significantly reduces soil respiration in an evergreen broadleaf forest in western China

et al. 2018

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Soil respiration is the second largest terrestrial carbon (C) flux; the responses of soil respiration to nitrogen (N) deposition have far-reaching influences on the global C cycle. N deposition has been documented to significantly affect soil respiration, but the results are conflicting. The response of soil respiration to N deposition gradients remains unclear, especially in ecosystems receiving increasing ambient N depositions. A field experiment was conducted in a natural evergreen broadleaf forest in western China from November 2013 to November 2015 to understand the effects of increasing N deposition on soil respiration. Four levels of N deposition were investigated: control (Ctr, without N added), low N (L, 50 kg N ha−1·a−1), medium N (M, 150 kg N ha−1·a−1), and high N (H, 300 kg N ha−1·a−1). The results show that (1) the mean soil respiration rates in the L, M, and H treatments were 9.13%, 15.8% (P < 0.05) and 22.57% (P < 0.05) lower than that in the Ctr treatment (1.56 ± 0.13 μmol·m−2·s−1), respectively; (2) soil respiration rates showed significant positive exponential and linear relationships with soil temperature and moisture (P < 0.01), respectively. Soil temperature is more important than soil moisture in controlling the soil respiration rate; (3) the Ctr, L, M, and H treatments yielded Q10 values of 2.98, 2.78, 2.65, and 2.63, respectively. N deposition decreased the temperature sensitivity of soil respiration; (4) simulated N deposition also significantly decreased the microbial biomass C and N, fine root biomass, pH and extractable dissolved organic C (P < 0.05). Overall, the results suggest that soil respiration declines in response to N deposition. The decrease in soil respiration caused by simulated N deposition may occur through decreasing the microbial biomass C and N, fine root biomass, pH and extractable dissolved organic C. Ongoing N deposition may have significant impacts on C cycles and increase C sequestration with the increase in global temperature in evergreen broadleaf forests.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Simulated nitrogen deposition significantly reduces soil respiration in an evergreen broadleaf forest in western China

et al. 2018

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“…Most existing SHR‐related research has focused on testing the sensitivities of SHR to environmental variations through multi‐factorial manipulation experiments at small scales like soil warming (Noh et al., 2016; Schindlbacher et al., 2009), rainfall exclusion (Hinko‐Najera et al., 2015; S. Huang et al., 2018), water addition (Liu, Lü, et al., 2018; Zou et al., 2018), and nitrogen fertilization experiments (Z. Chen et al., 2018; Peng et al., 2018). Although these studies enable us to understand local SHR responses under different environmental conditions, large‐scale spatial information of SHR is still limited, and contains large uncertainty.…”

Section: Introductionmentioning

confidence: 99%

A Data‐Driven Global Soil Heterotrophic Respiration Dataset and the Drivers of Its Inter‐Annual Variability

Yao

Ciais

Viovy

et al. 2021

Global Biogeochemical Cycles

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Soil heterotrophic respiration (SHR), the CO 2 flux produced by free-living microbial heterotrophs and soil fauna feeding on soil organic matter (Carbone et al., 2016;Hanson et al., 2000), constitutes a key ecosystem-to-atmosphere carbon flux that affects soil carbon storage and carbon-climate feedbacks. Since the magnitude of SHR is roughly four times of global annual anthropogenic fossil fuel emission (Le Quéré et al., 2018) and SHR can regulate the net ecosystem carbon exchange variability in some regions (Liu, Ballantyne, et al., 2018), even small changes in this flux can cause carbon redistribution between soil and atmosphere, and modify the carbon sink. Enhanced microbial dynamics in soil organic matter decomposition have been detected as the dominant factor in an increasing imbalance between higher CO 2 loss rate and CO 2 uptake by plants . Therefore, a detailed understanding of the SHR spatial and temporal dynamics under changing climate conditions is pivotal to improve projections of the carbon-climate feedback (Ballantyne et al., 2017;Bradford et al., 2019).However, unlike other components of the terrestrial carbon cycle like gross primary productivity (GPP) that can be measured through eddy covariance flux tower at plot scale, SHR observations mainly come from small-scale chambers, combined with intrusive methods (trenching, root exclusion, root extraction), or non-intrusive methods of isotope labeling with uncertainty in 14 C measurements (Bond-Lamberty et al., 2004;Hanson et al., 2000) to partition the heterotrophic and autotrophic soil fluxes. Due to the considerable uncertainty underlying these measurements, SHR is the most poorly constrained ecosystem and global carbon flux (Ciais et al., 2020;Konings et al., 2019).

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Interactive effects of plant litter chemistry and organic/inorganic forms of nitrogen addition on Moso bamboo (Phyllostachys edulis) soil respiration

Zhuo,

Fang,

Chen

et al. 2024

Biol Fertil Soils

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Nitrogen additions reduce rhizospheric and heterotrophic respiration in a subtropical evergreen broad-leaved forest

Cited by 19 publications

References 69 publications

Simulated nitrogen deposition significantly reduces soil respiration in an evergreen broadleaf forest in western China

Simulated nitrogen deposition significantly reduces soil respiration in an evergreen broadleaf forest in western China

A Data‐Driven Global Soil Heterotrophic Respiration Dataset and the Drivers of Its Inter‐Annual Variability

Interactive effects of plant litter chemistry and organic/inorganic forms of nitrogen addition on Moso bamboo (Phyllostachys edulis) soil respiration

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