Advanced tool for analysing 15N tracing data

Jansen-Willems, Anne; Zawallich, Jan; Müller, Christoph

doi:10.1016/j.soilbio.2021.108532

Cited by 7 publications

(1 citation statement)

References 24 publications

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“…Nitrogen availability in soil is regulated by numerous gross N transformation processes (Elrys, Wang, et al, 2021). The advancement of 15 N isotope tracing technologies has led to an improved understanding mechanisms of N transformations (Jansen‐Willems et al, 2022; Zaman et al, 2021). Soil gross N transformations to N addition differ among ecosystems (Dai et al, 2017; Kwak et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Impact of nitrogen and phosphorus additions on soil gross nitrogen transformations in a temperate desert steppe

Yue,

Zhang,

Zhu

et al. 2023

European J Soil Science

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Nutrient addition has a significant impact on plant growth and nutrient cycling. Yet, the understanding of how the addition of nitrogen (N) or phosphorus (P) significantly affects soil gross N transformations and N availability in temperate desert steppes is still limited. Therefore, a 15N tracing experiment was conducted to study these processes and their underlying mechanism in a desert steppe soil that had been supplemented with N and P for 4 years in northwestern China. Soil N mineralization was increased significantly by P addition, and N and P additions significantly promoted soil autotrophic nitrification, rather than NH4+‐N immobilization. The addition of N promoted dissimilatory NO3− reduction to NH4+, while that of P inhibited it. Soil NO3−‐N production was greatly increased by N added alone and by that of N and P combined, while net NH4+‐N production was decreased by these treatments. Soil N mineralization was primarily mediated by pH, P content or organic carbon, while soil NH4+‐N content regulated autotrophic nitrification mainly, and this process was mainly controlled by ammonia‐oxidizing bacteria rather than archaea and comammox. NH4+‐N immobilization was mainly affected by functional microorganisms, the abundance of narG gene and comammox Ntsp‐amoA. In conclusion, gross N transformations in the temperate desert steppe largely depended on soil inorganic N, P contents and related functional microorganisms. Soil acidification plays a more key role in N mineralization than other environmental factors or functional microorganisms.

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