J Soils Sediments (2017) 17:2338–2345 DOI 10.1007/s11368-016-1461-y 2015 INTERNATIONAL SYMPOSIUM ON FOREST SOILS Mechanisms behind the stimulation of nitrification by N input in subtropical acid forest soil 1,2 1,3,4,5 6,7 1,3,4,5 Wei Zhao & Jinbo Zhang & Christoph Müller & Zucong Cai Received: 24 January 2016 /Accepted: 19 May 2016 /Published online: 26 May 2016 Springer-Verlag Berlin Heidelberg 2016 Abstract established between the gross nitrification rate of NH and Purpose Input of N as NH is known to stimulate nitrifica- the gross mineralization rate (R = 0.991, P < 0.01), so was − + tion and to enhance the risk of N losses through NO leaching between net nitrification rate of NH and the net mineraliza- 3 4 in humid subtropical soils. However, the mechanisms respon- tion rate (R =0.973, P<0.05). sible for this stimulation effect have not been fully addressed. Conclusions Stimulation effect of N input on the gross rate of Materials and methods In this study, an acid subtropical forest nitrification of NH -N in the acid soil, partially, resulted from −1 soil amended with urea at rates of 0, 20, 50, 100 mg N kg stimulation effect of N input on organic N mineralization, was pre-incubated
Journal of Soils and Sediments – Springer Journals
Published: May 26, 2016
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