کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8894159 1629398 2018 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Soil carbon redistribution and organo-mineral associations after lateral soil movement and mixing in a first-order forest watershed
ترجمه فارسی عنوان
توزیع مجدد کربن خاک و انجمن مواد معدنی پس از حرکت خاک جانبی و مخلوط کردن در یک حوضه جنگلی مرتبه
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی
We test the hypothesis that erosion driven soil movement on hillslopes results in an increase in new organomineral associations and overall organic matter storage in colluvial deposits within a forested hillslope. We measured mineral specific surface area (SSA), organic carbon (OC), meteoric radioisotopes (210Pb, 137Cs, 10Be), soil physical properties, C/N, δ15N, δ13C, and ∆14C in bulk soil and density fractions in a hillslope transect of soil pits. The quantity of OC per unit of mineral surface area (OC/SA) and OC inventories increased by a factor of 2-3 in depositional sites as result of soil mixing due to erosional movement as confirmed by 210Pb, 137Cs, and 10Be profiles and inventories. Soil mixing systematically decreased C/N and enriched stable isotopes of δ13C and δ15N, revealing that formation of organomineral associations instead of microbial processing was responsible for depth trends in organic matter composition. Our findings indicate that the processes that associate organic matter and minerals are fundamentally linked with organic matter composition, and OC/SA, C/N, δ13C, and δ15N provide proxies for organic matter stabilization by soil minerals.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geoderma - Volume 319, 1 June 2018, Pages 142-155
نویسندگان
, , , , ,