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Predicting N2O Emission from Upland Cultivated with Pepper through Related Soil Parameters  

Kim, Gun-Yeob (National Institute of Agricultural Science and Technology, RDA)
Song, Beom-Heon (Department of Agronomy, College of Agriculture, Chungbuk National University)
Hyun, Byung-Keun (National Institute of Agricultural Science and Technology, RDA)
Shim, Kyo-Moon (National Institute of Agricultural Science and Technology, RDA)
Lee, Jeong-Taek (National Institute of Agricultural Science and Technology, RDA)
Lee, Jong-Sik (National Institute of Agricultural Science and Technology, RDA)
Kim, Won-Il (National Institute of Agricultural Science and Technology, RDA)
Shin, Joung-Du (National Institute of Agricultural Science and Technology, RDA)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.39, no.5, 2006 , pp. 253-258 More about this Journal
Abstract
An empirical model of nitrous oxide emission from agricultural soil has been applied. It is based on the relationship between $N_2O$ and three soil parameters, soil mineral N(ammonium plus nitrate) content in the topsoil(0-15cm), soil water-field pore space, and soil temperature, determined in a study on clay loam and sandy loam at the pepper field in 2004. For comparisons between estimated and observed values of $N_2O$ emissions in the pepper field, it was investigated that $N_2O$ amount in the clay loam and sandy loam were overestimated as 12.2% and less estimated as 30%, respectively. However, $N_2O$ emissions were overestimated as 27.1% in the clay loam and 14.7% in the sandy loam from $N_2O$ gas samples collected once a week at the same time analyzing soil parameters. This modelling approach, based as it is well established and widely used soil measurements, has the potential to provide flux estimates from a much wider range of agricultural sites than would be possible by direct measurement of $N_2O$ emissions.
Keywords
Soil parameter; $N_2O$ emission; Empirical model;
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