Plants with nitrate preference can regulate nitrification to meet their nitrate demand

He, Xiaoxiang; Chi, Qiang; Ling, Meng; Zhao, Chang; He, Mengqiu; Dan, Xiaoqian; Huang, Xinqi; Zhao, Jun; Cai, Zucong; Zhang, Jinbo; Müller, Christoph

doi:10.1016/j.soilbio.2021.108516

Cited by 25 publications

(24 citation statements)

References 49 publications

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“…Sustained N processing during drought could thus lead to greater N losses during subsequent wetting events. This can also be seen in the increasing soil δ 15 N values, which are due to the effects of drier conditions 49 .…”

Section: Importance Of Forests In the Global N Cyclementioning

confidence: 88%

“…To fill these knowledge gaps, we compiled 4,032 observations from 398 published 15 N pool dilution and tracing studies (Supplementary References and Supplementary Data 1) incorporating gross N cycling rate data across various ecosystems (Supplementary Fig. 1a,b) to characterize the spatial patterns of global soil N cycling.…”

Section: Global Patterns Of Internal N Cyclingmentioning

confidence: 99%

“…It is critical to understand the variability of soil gross N cycling rates resulting from the global spatial heterogeneity of climatic and edaphic variables, which is important for estimating the potential risk of N loss. Our study aimed to predict the global spatial variations of soil gross N cycling rates and highlights promising areas for future 15 N gross transformation studies. The type of data used in this study has also been used in previous meta-studies, the last one almost 20 years ago 8 .…”

Section: The Implications Of This Studymentioning

confidence: 99%

“…Estimates of soil gross N cycling rates in our analysis should therefore be interpreted with caution. Moreover, most of our data were based on laboratory studies, which do not necessarily reflect the in situ conditions of soil N cycling 8,[13][14][15] . Hence, we recognize that a number of the soil N cycling rates used in our study are possibly more in line with potential rates, a circumstance that also applies to all other studies of this kind.…”

mentioning

confidence: 99%

“…Understanding the variability of gross N cycling rates resulting from the global spatial heterogeneity of climatic and edaphic variables is essential for estimating the potential risk of N loss. Here we compiled 4,032 observations from 398 published 15 N pool dilution and tracing studies to analyse the interactions between soil internal potential N cycling and environmental effects. We observed that the global potential N cycle changes from a conservative cycle in forests to a less conservative one in grasslands and a leaky one in croplands.…”

mentioning

confidence: 99%

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Expanding agroforestry can increase nitrate retention and mitigate the global impact of a leaky nitrogen cycle in croplands

et al. 2022

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The internal soil nitrogen (N) cycle supplies N to plants and microorganisms but may induce N pollution in the environment. Understanding the variability of gross N cycling rates resulting from the global spatial heterogeneity of climatic and edaphic variables is essential for estimating the potential risk of N loss. Here we compiled 4,032 observations from 398 published 15N pool dilution and tracing studies to analyse the interactions between soil internal potential N cycling and environmental effects. We observed that the global potential N cycle changes from a conservative cycle in forests to a less conservative one in grasslands and a leaky one in croplands. Structural equation modelling revealed that soil properties (soil pH, total N and carbon-to-N ratio) were more important than the climate factors in shaping the internal potential N cycle, but different patterns in the potential N cycle of terrestrial ecosystems across climatic zones were also determined. The high spatial variations in the global soil potential N cycle suggest that shifting cropland systems towards agroforestry systems can be a solution to improve N conservation.

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Section: Importance Of Forests In the Global N Cyclementioning

confidence: 88%

Section: Global Patterns Of Internal N Cyclingmentioning

confidence: 99%

Section: The Implications Of This Studymentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Expanding agroforestry can increase nitrate retention and mitigate the global impact of a leaky nitrogen cycle in croplands

et al. 2022

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Ammonia‐oxidizing bacteria rather than ammonia‐oxidizing archaea dominates soil nitrification during vegetation restoration in karst areas

Sun,

Xiao,

Zhang

et al. 2024

Land Degrad Dev

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Soil nitrification, driven by ammonia‐oxidizing archaea (AOA) and ammonia‐oxidizing bacteria (AOB), is a crucial process in maintaining the soil nitrogen (N) balance. However, the influence of AOA and AOB on soil gross nitrification rates (GNR) in response to vegetation restoration remains unclear, particularly in karst regions. In this study, we investigated soil GNR and the abundance, diversity, and community composition of AOA and AOB across after vegetation restoration. Four land use types were examined: plantation forest (PF), forage grass (FG), a combination of plantation forest and forage grass (FG), and cropland (CR, control). Soil ammonium N () was higher in the vegetation restoration compared to that in cropland, whereas nitrate N () exhibited the opposite trend. Soil GNR were reduced by 55.4%–90.3% in the vegetation restorations compared to that in cropland. The abundance, Chao1, and Shannon index of AOB were lower in vegetation restorations compared to cropland, respectively. The abundance and diversity of AOA were higher than those of AOB but were unaffected by vegetative restoration. Furthermore, AOB community is more sensitive to vegetation restoration than AOA community. Specifically, the abundance of AOB taxa belonging to the genera Nitrosospira and Nitrosovibrio was decreased by the restoration efforts. In addition, soil nutrients availability (e.g., , , and phosphorus) and AOB index (e.g., Shannon index) were the main factors driving soil GNR. This study highlights the importance of AOB in driving soil nitrification during vegetation restoration and emphasizes the necessity to optimize soil nitrogen management in karst ecosystems.

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Heterotrophic nitrification of organic nitrogen in soils: process, regulation, and ecological significance

et al. 2023

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Plants with nitrate preference can regulate nitrification to meet their nitrate demand

Cited by 25 publications

References 49 publications

Expanding agroforestry can increase nitrate retention and mitigate the global impact of a leaky nitrogen cycle in croplands

Expanding agroforestry can increase nitrate retention and mitigate the global impact of a leaky nitrogen cycle in croplands

Ammonia‐oxidizing bacteria rather than ammonia‐oxidizing archaea dominates soil nitrification during vegetation restoration in karst areas

Heterotrophic nitrification of organic nitrogen in soils: process, regulation, and ecological significance

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