Soil net nitrogen mineralisation across global grasslands

Risch, A.C. and Zimmermann, S. and Ochoa-Hueso, R. and Schütz, M. and Frey, B. and Firn, J.L. and Fay, P.A. and Hagedorn, F. and Borer, E.T. and Seabloom, E.W. and Harpole, W.S. and Knops, J.M.H. and McCulley, R.L. and Broadbent, A.A.D. and Stevens, C.J. and Silveira, M.L. and Adler, P.B. and Báez, S. and Biederman, L.A. and Blair, J.M. and Brown, C.S. and Caldeira, M.C. and Collins, S.L. and Daleo, P. and di Virgilio, A. and Ebeling, A. and Eisenhauer, N. and Esch, E. and Eskelinen, A. and Hagenah, N. and Hautier, Y. and Kirkman, K.P. and MacDougall, A.S. and Moore, J.L. and Power, S.A. and Prober, S.M. and Roscher, C. and Sankaran, M. and Siebert, J. and Speziale, K.L. and Tognetti, P.M. and Virtanen, R. and Yahdjian, L. and Moser, B. (2019) Soil net nitrogen mineralisation across global grasslands. Nature Communications, 10 (1). ISSN 2041-1723

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Abstract

Soil nitrogen mineralisation (Nmin), the conversion of organic into inorganic N, is important for productivity and nutrient cycling. The balance between mineralisation and immobilisation (net Nmin) varies with soil properties and climate. However, because most global-scale assessments of net Nmin are laboratory-based, its regulation under field-conditions and implications for real-world soil functioning remain uncertain. Here, we explore the drivers of realised (field) and potential (laboratory) soil net Nmin across 30 grasslands worldwide. We find that realised Nmin is largely explained by temperature of the wettest quarter, microbial biomass, clay content and bulk density. Potential Nmin only weakly correlates with realised Nmin, but contributes to explain realised net Nmin when combined with soil and climatic variables. We provide novel insights of global realised soil net Nmin and show that potential soil net Nmin data available in the literature could be parameterised with soil and climate data to better predict realised Nmin.

Item Type:
Journal Article
Journal or Publication Title:
Nature Communications
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
138951
Deposited By:
Deposited On:
15 Nov 2019 10:25
Refereed?:
Yes
Published?:
Published
Last Modified:
30 Sep 2020 09:26