Temporal Variation of Ammonium in Sulfic Tropaquept Cultivated with Rice in Experimental Pots

K. Nurulhuda, M.H.A. Husni, M.A.M. Zawawi, M.P. Zakaria, P.C. Struik, K.J. Keesman

Research output: Chapter in Book/Report/Conference proceedingConference paperAcademic


Hypothetically, monitoring of soil solution NH4+-N dynamics may allow estimation of nitrogen (N) transformation rates such as the rates of nitrification, denitrification, mineralisation and immobilisation. Such observations can be used to evaluate and improve performance of N dynamics models for flooded rice systems. Therefore, the objective of this study was to evaluate temporal variation of ammonium dynamics in fertilised and flooded rice pots. Concentrations of NH4+-N were determined in soil solutions that were extracted by MacroRhizon samplers. MacroRhizon is a soil solution sampler with a pore size of 0.15 μm manufactured by Rhizosphere Research, the Netherlands. In comparison to typical soil sampling methods, some advantages of using MacroRhizon are repeated sampling at the same spot possible, easy to install and less disturbance to the soil due to the small diameter, and maximum pore size of 0.2 μm which requires no further filtering prior to chemical analysis. Results showed that under current agronomic and management practices, broadcast N application had no obvious and consistent influence on soil solution NH4+-N. Analysis of the results suggest that suitability of soil solutions extracted using the MacroRhizon samplers as alternatives for the labourious and destructive conventional soil samplings is subject to further investigation.
Original languageEnglish
Title of host publicationKonvensyen Kebangsaan KejuruteraanPertanian Dan Makanan 2019, Mac 2019, Wisma Tani, Kementerian Pertanian dan Industri Asas Tani Malaysia, Putrajaya
ISBN (Electronic)9789671614518
Publication statusPublished - 2019
EventKonvensyen Kebangsaan Kejuruteraan Pertanian Dan Makanan 2019 - Dewan Serbaguna MOA, Wisma Tani, Putrajaya, Malaysia
Duration: 21 Mar 201921 Mar 2019
Conference number: MSAE2019-ARWM09


ConferenceKonvensyen Kebangsaan Kejuruteraan Pertanian Dan Makanan 2019
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