کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8364989 | 1542616 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Loss of labile carbon following soil disturbance determined by measurement of respired â13CO2
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش خاک شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Loss of labile carbon following soil disturbance determined by measurement of respired â13CO2 Loss of labile carbon following soil disturbance determined by measurement of respired â13CO2](/preview/png/8364989.png)
چکیده انگلیسی
Soils are the largest pool of carbon (C) in terrestrial ecosystems with labile C being particularly vulnerable to loss. In this study we incubated a range of soils in both the short- (minutes) and long-term (months) to assess the loss of labile soil C by measuring the isotopic signature of soil respired CO2 (â13CO2). Strong temporal trends in â13CO2 values were observed following soil disturbance: â13CO2 rapidly changed from a range of â22.5 to â23.9â° to â25.8 to â27.5â° during short-term incubations and reverted back to the initial values in long-term incubations. The shifts in â13CO2 over the course of soil incubations were consistent with changes in labile C substrate utilization following the disturbance of sampling the soil. An independent experimental approach which immobilised labile soil C onto allophane and included chemical extractions as a measure of extractable C in soils also confirmed this interpretation. Collectively, these results indicate that the isotopic analysis of respired CO2 can be a powerful technique which enables us to probe mechanisms and examine the consequences of disturbance on the labile component of soil C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Soil Biology and Biochemistry - Volume 68, January 2014, Pages 125-132
Journal: Soil Biology and Biochemistry - Volume 68, January 2014, Pages 125-132
نویسندگان
A. Zakharova, A.J. Midwood, J.E. Hunt, S.L. Graham, R.R.E. Artz, M.H. Turnbull, D. Whitehead, P. Millard,