کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2026009 | 1070016 | 2006 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Organic C and N stabilization in a forest soil: Evidence from sequential density fractionation
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کلمات کلیدی
15N13CMRT14Camino acid - آمینو اسیدSmectite - اﺳﻤﻜﺘﻴﺖcutin - ببرparticle density - تراکم ذراتSuberin - زیررینSulfur - سولفور یا گوگردAmino sugar - شکر آمینوLignin - لیگنینSoil organic matter - ماده آلی خاکMagnetite - مگنتیت Nitrogen - نیتروژنX-ray diffraction - پراش اشعه ایکسProtein - پروتئینCarbon - کربنGlycoprotein - گلیکوپروتئین
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش خاک شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
X-ray diffraction before and after separation of magnetic materials showed that the sequential density fractionation (SDF) isolated pools of differing mineralogy, with layer-silicate clays dominating in two of the intermediate fractions and primary minerals in the heaviest two fractions. There was no indication that these differences in mineralogy controlled the differences in density of the organo-mineral particles in this soil. Thus, our data are consistent with the hypothesis that variation in particle density reflects variation in thickness of the organic accumulations and with an “onion” layering model for organic matter accumulation on mineral surfaces. However, the mineralogy differences among fractions made it difficult to test either the layer-thickness or “onion” layering models with this soil. Although SDF isolated pools of distinct mineralogy and organic-matter composition, more work will be needed to understand mechanisms relating the two factors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Soil Biology and Biochemistry - Volume 38, Issue 11, November 2006, Pages 3313-3324
Journal: Soil Biology and Biochemistry - Volume 38, Issue 11, November 2006, Pages 3313-3324
نویسندگان
Phillip Sollins, Christopher Swanston, Markus Kleber, Timothy Filley, Marc Kramer, Susan Crow, Bruce A. Caldwell, Kate Lajtha, Richard Bowden,