کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8894062 | 1629395 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Phosphorus speciation in a long-term manure-amended soil profile - Evidence from wet chemical extraction, 31P-NMR and P K-edge XANES spectroscopy
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Topsoil P contents were with 42â¯mmolâ¯kgâ1 more than twice as high as in the sub soil (14-18â¯mmolâ¯kgâ1). Linear combination fitting (LCF) of P K-edge XANES spectra indicated that P accumulation in the topsoil occurred predominantly via adsorption of inorganic P to Fe/Al hydroxide surfaces, resulting in substantial P saturation of these mineral phases. Up to 76% of the topsoil P was associated with Al or Fe. The organic P content was low (5-10%), but an additional important topsoil P pool identified with XANES-LCF was amorphous calcium phosphate (30%), which may have been added with manure or formed in situ. Towards the deeper subsoil the relative portion of primary apatite increased progressively and reached 80% of total P at a depth of 70 to 80â¯cm. These results highlight the importance of Fe and Al mineral phases for P retention in long-term manure-amended soils also under non-acidic conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geoderma - Volume 322, 15 July 2018, Pages 19-27
Journal: Geoderma - Volume 322, 15 July 2018, Pages 19-27
نویسندگان
Frank Schmieder, Lars Bergström, Matthew Riddle, Jon-Petter Gustafsson, Wantana Klysubun, Franz Zehetner, Leo Condron, Holger Kirchmann,