
TY  - JOUR
A1  - Leite, L. F. C. 
A1  - Mendonça, E. S. 
A1  - Machado, P. L. O. A. 
A1  - Matos, E. S. 
T1  - Total C and N storage and organic C pools of a Red-Yellow Podzolic under conventional and no tillage at the Atlantic Forest Zone, south-eastern Brazil
JF  - Soil Research
JO  - Soil Res.
Y1  - 2003
VL  - 41
IS  - 4
SP  - 717
EP  - 730
KW  - microbial biomass, labile carbon, humic substances, soil management, tropical soil.
UR  - https://doi.org/10.1071/SR02037 
N2  - A 15-year experiment in a clayey Red-Yellow Podzolic in the tropical highlands of Vi&#231;osa, Brazil, was studied in 2000, aiming to evaluate the impact of different management systems (no tillage, disk plowing, heavy scratcher + disk plowing, and heavy scratched) on the total organic carbon (TOC), total nitrogen (TN), and several organic carbon pools. A natural forest, adjacent to the experimental area, was used as reference. The greatest TOC and TN as well as microbial biomass C (CMB), light fraction C (CFL), and labile organic carbon (CL) stocks were observed in the Atlantic Forest, compared with all other systems. The long-term cultivation (&#177;70 years) of this area, prior to the installation of the experiment, has led to soil degradation, slowing the C recovery. No tillage had the higher C and N stocks and greater CL pool at the surface (0&#8211;10 cm), indicating improvement in soil nutrient status, although none of the systems presented potential to sequester C-CO2. Sustainable tropical agricultural systems should involve high residue input and conservative soil management in order to act as a C-CO2 sink. The C stocks in the CMB, CFL, and CL compartments were more reduced in relation to the natural vegetation with higher intensity management than the TOC stocks. This result indicates that these C compartments are more sensitive to changes in the soil management. 
ER  -

