کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6368584 | 1623238 | 2015 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Tillage systems effects on soil carbon stock and physical fractions of soil organic matter
ترجمه فارسی عنوان
سیستم های خاکورزی بر میزان ذخیره کربن خاک و فیزیکی خاک آلی خاک تاثیر می گذارد
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم کشاورزی و بیولوژیک (عمومی)
چکیده انگلیسی
Changes in soil management and land use influence soil organic matter (SOM) turnover through changes in quantity and quality of plant residues entering the soil, their seasonal and spatial distribution, the ratio between above- and bellow-ground inputs and through changes in soil disturbance. We hypothesized that the sequestered C is stored mainly in the mineral associated fraction (C associated in sand, silt and clay fraction). The objective of this study was to evaluate the C stock and stabilization in a tropical Dystrophic Red Latosol (Typic Haplortox) (Paty do Alferes, Brazil) subjected to 6-years soil tillage systems and soil cover. Treatments included no-tillage (NT), animal traction (AT) and conventional tillage (CT). Two additional treatments were evaluated: grass coverage (GC) and bare soil (BS). After six years crop, soil C stock in the 0-10âcm layer was higher in NT than in CT (17.6 vs. 12.3âMgâhaâ1, Pâ<â0.05). It resulted an increase of 5.3âMgâCâhaâ1 in NT when comparing to CT. In NT, most of the C accumulation compared to CT occurred in the mineral associated fraction. Although, only the C associated in sand fraction was statistically different (6.7 vs. 1.2âgâkgâ1 soil, Pâ<â0.05). GC had the highest C sequestration and C and N associated in the mineral fraction (14.9âgâCâkgâ1 and 5.1âgâNâkgâ1) in the 0-5âcm depth. For all treatments, most of the soil organic C was in the heavy fraction (>â55%). GC incorporated to soil annually 0.6âMgâCâhaâ1. C associated with sand fractions was the most sensible mineral associated C fraction compared to C in silt and clay fraction, and can be used as a suitable soil quality indicator for sustainable use.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Agricultural Systems - Volume 132, January 2015, Pages 35-39
Journal: Agricultural Systems - Volume 132, January 2015, Pages 35-39
نویسندگان
Ãrika Flávia Machado Pinheiro, David Vilas Boas de Campos, Fabiano de Carvalho Balieiro, Lúcia Helena Cunha dos Anjos, Marcos Gervasio Pereira,