کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4426536 1309128 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The importance of ammonium mobility in nitrogen-impacted unfertilized grasslands: A critical reassessment
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
The importance of ammonium mobility in nitrogen-impacted unfertilized grasslands: A critical reassessment
چکیده انگلیسی

The physico-chemical absorption characteristics of ammonium-N for 10 soils from 5 profiles in York, UK, show its high potential mobility in N deposition-impacted, unfertilized, permanent grassland soils. Substantial proportions of ammonium-N inputs were retained in the solution phase, indicating that ammonium translocation plays an important role in the N cycling in, and losses from, such soils. This conclusion was further supported by measuring the ammonium-N leaching from intact plant/soil microcosms. The ammonium-N absorption characteristics apparently varied with soil pH, depth and soil texture. It was concluded for the most acid soils especially that ammonium-N leached from litter horizons could be seriously limiting the capacity of underlying soils to retain ammonium. Contrary to common opinion, more attention therefore needs to be paid to ammonium leaching and its potential role in biogeochemical N cycling in semi-natural soil systems subject to atmospheric pollution.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 157, Issue 4, April 2009, Pages 1287–1293
نویسندگان
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