کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4570903 1629207 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Drying-rewetting cycles alter carbon and nitrogen mineralization in litter-amended alpine wetland soil
ترجمه فارسی عنوان
چرخه خشک کردن rewetting را تغییر کربن و کانی نیتروژن در بستر اصلاح خاک آلپی تالاب
کلمات کلیدی
تالاب آلپ؛ کانی سازی C؛ چرخه خشک کردن و چرت زدن؛ علاوه بر این بستر؛ کانی سازی N؛ خاک ارگانیک C
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی


• Drying-rewetting cycles significantly regulated C mineralization and N immobilization.
• C mineralization and N immobilization were greatly increased with litter addition.
• A significant positive relationship between C and N mineralization became more pronounced when litter was added.
• Drying-rewetting cycles can alter C and N mineralization, and such effect strongly depend on litter in alpine wetlands.

Wetting-drying cycles can influence decomposition of litter and soil organic carbon (SOC) and their mineralization, but such effects have seldom been explored in alpine wetland soils. We conducted a 120-day incubation experiment with alpine wetland soils to which we added litter or not. These soil samples were assigned to two constant moisture treatments (60% or 100% soil water-holding capacity, WHC) or to a wetting-drying treatment that cycled between 60% and 100% WHC. Drying-rewetting cycles significantly accelerated carbon (C) mineralization and nitrogen (N) immobilization compared to soil under saturated soil moisture conditions. Litter addition greatly increased C mineralization and N immobilization, but the intensity of mineralization was regulated by soil moisture through microbial biomass. A significantly negative relationship between C and N mineralization became more pronounced when litter was added. Thus, drying-rewetting cycles can alter C and N mineralization, and this effect can strongly depend on litter in alpine wetlands. This indicates that future climate change could affect C stocks in alpine wetland soil through altering moisture and litter production.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: CATENA - Volume 145, October 2016, Pages 285–290
نویسندگان
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