Abstract
Nitrogen release from several thermoplastic resin-coated urea (P-CU) and thermosetting resin-coated urea (S-CU) was proportional to the differences in water vapor pressures between inside and outside of the coatings. The N release was so widely different with individual granules, and each curve followed the first-order release pattern. The sigmoidal curves found with the bulk samples were only the mean of the individual release curves. We proposed a new release simulation model, introducing a factor to correct for the variance in the initial lag period of the release. The validity of the model was verified with the data obtained in the actual paddy soils.
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References
Ishibashi E, Konno T and Kimoto H 1992 Jpn. J. Soil Sci. Plant Nutr. 63, 664–668.
Kobayashi A, Fujisawa E and Hanyu T 1997 Jpn. J. Soil Sci. Plant Nutr. 68, 8–13, 14–22.
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© 1997 Kluwer Academic Publishers
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Fujisawa, E., Kobayashi, A., Hanyu, T. (1997). A mechanism and an improved simulation of nitrogen release from resin-coated urea. In: Ando, T., Fujita, K., Mae, T., Matsumoto, H., Mori, S., Sekiya, J. (eds) Plant Nutrition for Sustainable Food Production and Environment. Developments in Plant and Soil Sciences, vol 78. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0047-9_206
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DOI: https://doi.org/10.1007/978-94-009-0047-9_206
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-6510-8
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