Evaluation of N₂O Emissions with Changes of Soil Temperature, Soil Water Content and Mineral N in Red Pepper and Soybean Field
2010
Kim, G.Y., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | So, K.H., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Jeong, H.C., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Shim, K.M., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Lee, S.B., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea | Lee, D.B., National Academy of Agricultural Science, RDA, Suwon, Republic of Korea
Importance of climate change and its impact on agriculture and environment has increased with a rise of greenhouse gases (GHGs) concentration in Earth's atmosphere. Nitrous oxide (N₂O) emission in upland fields were assessed in terms of emissions and their control at the experimental plots of National Academy of Agricultural Science (NAAS), Rural Development Administration (RDA) located in Suwon city. It was evaluated N₂O emissions at different soil water content, soil temperature, and mineral N conditions in a upland cultivating red pepper and soy bean. The results were as follows: 1) There were significant correlation between amount of N₂O emissions and soil temperature, soil water content and mineral N conditions showed 0.528**, 0.790*** and 0.937*** in red pepper field and 0.658***, 0.710*** and 0.865*** in soybean field, respectively. 2) From the contribution rate analysis as to contribution factors for N₂O emission, it appeared that contribution rate was in the order of mineral N (71.9%), soil moisture content (23.6%), and soil temperature (4.5%) in pepper field and mineral N (65.5%), soil moisture contents (19.2%), and soil temperature (15.2%) in soybean field.
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