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Comparisons of the effects of different drying methods on soil nitrogen fractions: Insights into emissions of reactive nitrogen gases (HONO and NO)

التفاصيل البيبلوغرافية
العنوان: Comparisons of the effects of different drying methods on soil nitrogen fractions: Insights into emissions of reactive nitrogen gases (HONO and NO)
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
الوصف
تدمد:16742834
23766123
DOI:10.1080/16742834.2020.1733388