Effects of Nitrogen Deposition on Soil Dissolved Organic Carbon and Nitrogen in Moso Bamboo Plantations Strongly Depend on Management Practices

Lei, Zhaofeng; Sun, Huanfa; Li, Quan; Zhang, Junbo; Song, Xinzhang

doi:10.3390/f8110452

Cited by 12 publications

(12 citation statements)

References 33 publications

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“…To date, it is still unclear whether Moso bamboo can emit CH 4 and how N deposition may influence plant CH 4 emissions, which contributes to uncertainty of our results. Our previous study in the same site also found that N deposition significantly increased the loss of soil DOC and dissolved organic nitrogen (28) and soil respiration rate (41), which might contribute to soil C variation and N 2 O emission. In addition, continued N fertilization and atmospheric N deposition can result in continuous declines in soil pH, which likely induce aluminum toxicity or other problems, and eventually maybe suppress plant growth and C uptake capacity.…”

Section: Bcmentioning

confidence: 58%

“…Different lowercase letters indicate significant differences among N addition rates for the same variable (P < 0.05). − induced by N deposition in this study site (28), and thus also inhibit CH 4 oxidation. The optimum pH range for most methanotrophic bacteria is from 4 to 7.5.…”

Section: Discussionmentioning

confidence: 72%

“…Our previous studies at this site indicated that N deposition increased soil available N (NO 3 − -N and NH 4 + -N) (28) and that N released from the larger litterfall and N return (32) and faster decomposition of leaf litter and fine roots (26,27) produced more reaction substrates for nitrification and denitrification and thus increase N 2 O emissions. In the present study, N addition treatments significantly decreased the diversity of ammonia oxidizing archaea and denitrobacteria (norB) Previous studies in temperate woodlands found that N addition decreased soil CH 4 consumption by 14 to 51% (36,37), consistent with our results.…”

Section: Discussionmentioning

confidence: 81%

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Nitrogen addition increased CO ₂ uptake more than non-CO ₂ greenhouse gases emissions in a Moso bamboo forest

et al. 2020

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Atmospheric nitrogen (N) deposition affects the greenhouse gas (GHG) balance of ecosystems through the net atmospheric CO2 exchange and the emission of non-CO2 GHGs (CH4 and N2O). We quantified the effects of N deposition on biomass increment, soil organic carbon (SOC), and N2O and CH4 fluxes and, ultimately, the net GHG budget at ecosystem level of a Moso bamboo forest in China. Nitrogen addition significantly increased woody biomass increment and SOC decomposition, increased N2O emission, and reduced soil CH4 uptake. Despite higher N2O and CH4 fluxes, the ecosystem remained a net GHG sink of 26.8 to 29.4 megagrams of CO2 equivalent hectare−1 year−1 after 4 years of N addition against 22.7 hectare−1 year−1 without N addition. The total net carbon benefits induced by atmospheric N deposition at current rates of 30 kilograms of N hectare−1 year−1 over Moso bamboo forests across China were estimated to be of 23.8 teragrams of CO2 equivalent year−1.

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Section: Bcmentioning

confidence: 58%

Section: Discussionmentioning

confidence: 72%

Section: Discussionmentioning

confidence: 81%

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Nitrogen addition increased CO ₂ uptake more than non-CO ₂ greenhouse gases emissions in a Moso bamboo forest

et al. 2020

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“…Literature data also shows, that the fertilizer effect on DOC leaching is time depended. Immediately after fertilization, effects on DOC leaching could be observed (Lei et al, 2017;Long et al, 2015), while 4 month after fertilization no response was found (Wang et al, 2008).…”

Section: Amounts Of Leached Docmentioning

confidence: 89%

Short-term effects of fertilization on dissolved organic matter (DOM) in soil leachate

Tiefenbacher

Weigelhofer

Klik

et al. 2020

Preprint

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Abstract. Besides the importance of dissolved organic matter (DOM) in soil biogeochemical processes, there is still a debate on how agricultural intensification affects the composition and concentration of dissolved organic matter leached from soils into adjacent aquatic ecosystems. In order to investigate the immediate response of DOM leaching to fertilization, we conducted a short-term (45 day) lysimeter experiment with undisturbed silt loam and loamy sand soil cores. Mineral (calcium ammonium nitrate) or organic (pig slurry) fertilizer was applied on the soil surface with a concentration equivalent to 130 kg N ha−1. After fertilization, soil leachate was collected in 6-days intervals. Dissolved organic carbon concentrations (DOC) were measured with gas chromatography, while shifts in DOM composition were analysed using absorbance and excitation- emission fluorescence indices from peak-picking as well as from PARAFAC analysis. During the first 12 days, fertilization of a silt loam reduced DOC concentrations in the leachate and shifted its composition towards more microbial- like compounds. Additionally, the discrepancy in DOM composition between fertilizer and control treatments of a silt loam increased with time. However, in loamy sand only mineral fertilization affected organic matter leaching and decreased DOC concentrations in the leachate during the first 12 days. Furthermore, mineral fertilization of the loamy sand led to DOM compounds with low molecular size in the first 12 days. Our results show that fertilization tends to increase microbial transformed DOM, while it reduces leached DOC concentrations. Furthermore, the magnitude of fertilization on DOC concentrations and DOM composition was highly depending on the soil texture they originate from. However, in our set-up, the experimental soil units were restricted to a soil depth of 16 cm (Ap horizon). At ecosystem level, a sufficiently long soil passage might mitigate the impact of fertilization on soil DOM.

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“…The samples in subsample 2 were passed through a 2 mm mesh sieve and used to determine the soil extractable dissolved organic C (DOC) and microbial biomass C and N (MBC and MBN). The soil samples were extracted with distilled water (soil:water ratio, 2:1), shaken for 0.5 h (170 rpm) at 25°C, and centrifuged for 20 min at 3500 rpm; the supernatant was filtered through a membrane (0.45 μm, Millipore, Xingya Corporation, Shanghai, China) into a plastic bottle [ 39 ]. Then, the DOC concentrations were determined using a total C and N analyzer (Shimadzu model TOC-V CPH +TNM-1, Kyoto, Japan).…”

Section: Methodsmentioning

confidence: 99%

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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Effects of Nitrogen Deposition on Soil Dissolved Organic Carbon and Nitrogen in Moso Bamboo Plantations Strongly Depend on Management Practices

Cited by 12 publications

References 33 publications

Nitrogen addition increased CO ₂ uptake more than non-CO ₂ greenhouse gases emissions in a Moso bamboo forest

Nitrogen addition increased CO ₂ uptake more than non-CO ₂ greenhouse gases emissions in a Moso bamboo forest

Short-term effects of fertilization on dissolved organic matter (DOM) in soil leachate

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

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Effects of Nitrogen Deposition on Soil Dissolved Organic Carbon and Nitrogen in Moso Bamboo Plantations Strongly Depend on Management Practices

Cited by 12 publications

References 33 publications

Nitrogen addition increased CO 2 uptake more than non-CO 2 greenhouse gases emissions in a Moso bamboo forest

Nitrogen addition increased CO 2 uptake more than non-CO 2 greenhouse gases emissions in a Moso bamboo forest

Short-term effects of fertilization on dissolved organic matter (DOM) in soil leachate

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

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Nitrogen addition increased CO ₂ uptake more than non-CO ₂ greenhouse gases emissions in a Moso bamboo forest

Nitrogen addition increased CO ₂ uptake more than non-CO ₂ greenhouse gases emissions in a Moso bamboo forest