Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 558456
Title Temporal Variation of Ammonium in Sulfic Tropaquept Cultivated with Rice in Experimental Pots
Author(s) Nurulhuda, K.; Husni, M.H.A.; Zawawi, M.A.M.; Zakaria, M.P.; Struik, P.C.; Keesman, K.J.
Source In: Konvensyen Kebangsaan KejuruteraanPertanian Dan Makanan 2019, Mac 2019, Wisma Tani, Kementerian Pertanian dan Industri Asas Tani Malaysia, Putrajaya. - - p. 32 - 35.
Event Konvensyen Kebangsaan Kejuruteraan Pertanian Dan Makanan 2019, Putrajaya, 2019-03-21/2019-03-21
Department(s) PE&RC
Crop Physiology
Mathematical and Statistical Methods - Biometris
Publication type Contribution in proceedings
Publication year 2019
Abstract 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.
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