Modelling ammonia volatilisation associated with liquid manure application
Van der Beken, P.D.; Pieters, J.G.; Verschoore, R.A.
Communications in Agricultural and Applied Biological Sciences 69(2): 301-304
2004
ISSN/ISBN: 1379-1176 PMID: 15560246 Document Number: 567455
To predict ammonia volatilization, from in this case, field applied manure, a computational fluid dynamics model was designed in this study, which can describe the system two- and/or three-dimensionally. The model should enable the user to make an accurate estimate of expected ammonia losses after manure application as a function of parameters such as type of fertilizer, soil characteristics and weather conditions. The model was simulated in a virtual wind-tunnel. The model showed a more pronounced ammonia distribution in the wind-tunnel with lower wind speed. The air velocity resulted in a fast removal of emitted ammonia from the soil surface out of the wind-tunnel. It was observed that around the stubbles, air velocity almost reaches zero, resulting in high ammonia concentration at that level. Velocity contours with different specified inlet-velocity are similar, although the occurring velocity speeds in the wind-tunnel have different values.