دورية أكاديمية
Comparisons of the effects of different drying methods on soil nitrogen fractions: Insights into emissions of reactive nitrogen gases (HONO and NO)
العنوان: | Comparisons of the effects of different drying methods on soil nitrogen fractions: Insights into emissions of reactive nitrogen gases (HONO and NO) |
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المؤلفون: | Dianming WU, Lingling DENG, Yanzhuo LIU, Di XI, Huilan ZOU, Ruhai WANG, Zhimin SHA, Yuepeng PAN, Lijun HOU, Min LIU |
المصدر: | Atmospheric and Oceanic Science Letters, Vol 13, Iss 3, Pp 224-231 (2020) |
بيانات النشر: | KeAi Communications Co., Ltd., 2020. |
سنة النشر: | 2020 |
المجموعة: | LCC:Environmental sciences LCC:Oceanography |
مصطلحات موضوعية: | freeze-dried, nitrogen cycling, nox, soil ph, gas flux, Environmental sciences, GE1-350, Oceanography, GC1-1581 |
الوصف: | Reactive nitrogen (Nr) emission from soils, e.g., nitrous acid (HONO) and nitric oxide (NO), is a key process of the global nitrogen (N) cycle and has significant implications for atmospheric chemistry. To understand the underlying mechanisms of soil Nr emissions, air-dried or oven-dried soils are commonly used in the laboratory. To date, few studies have compared the effects of different drying methods on soil Nr gas fluxes and N fractions. Here, the authors studied soil water content, pH, (in)organic N content, and Nr gas fluxes of air-dried, freeze-dried, oven-dried, and fresh soils from different land-use types. The results showed that the soil pH of air-dried and oven-dried samples was significantly lower compared with fresh soil from farmland and grassland, but higher compared with forest soil. The difference in soil pH between freeze-dried and fresh soil (mean ± standard deviation: 0.52 ± 0.31) was the lowest. In general, all drying methods increased the soil NH4+-N, NO3−-N, and dissolved organic N contents compared with fresh soil (P 0.2). In conclusion, all drying methods should be considered for use in studies on the land–atmosphere interface and biogeochemical N cycling, whereas the freeze-drying method might be better for studies involving the measurement of soil Nr gas fluxes. |
نوع الوثيقة: | article |
وصف الملف: | electronic resource |
اللغة: | English |
تدمد: | 1674-2834 2376-6123 16742834 |
Relation: | https://doaj.org/toc/1674-2834; https://doaj.org/toc/2376-6123 |
DOI: | 10.1080/16742834.2020.1733388 |
URL الوصول: | https://doaj.org/article/c5df3f49b88745eaa9cd2db1d357f953 |
رقم الأكسشن: | edsdoj.5df3f49b88745eaa9cd2db1d357f953 |
قاعدة البيانات: | Directory of Open Access Journals |
تدمد: | 16742834 23766123 |
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DOI: | 10.1080/16742834.2020.1733388 |