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Effect of Direct Seeding Mulch-Based Systems on Soil Carbon Storage and Macrofauna in Central Brazil

Eric Blanchart
Martial Bernoux
Xavier Sarda
Marcos Siqueira Neto
Carlos C. Cerri
Marisa Piccolo
Jean-Marie Douzet
Eric Scopel
Christian Feller

Puni tekst: engleski, pdf (191 KB) str. 81-87 preuzimanja: 552* citiraj
APA 6th Edition
Blanchart, E., Bernoux, M., Sarda, X., Siqueira Neto, M., Cerri, C.C., Piccolo, M., ... Feller, C. (2007). Effect of Direct Seeding Mulch-Based Systems on Soil Carbon Storage and Macrofauna in Central Brazil. Agriculturae Conspectus Scientificus, 72 (1), 81-87. Preuzeto s https://hrcak.srce.hr/12906
MLA 8th Edition
Blanchart, Eric, et al. "Effect of Direct Seeding Mulch-Based Systems on Soil Carbon Storage and Macrofauna in Central Brazil." Agriculturae Conspectus Scientificus, vol. 72, br. 1, 2007, str. 81-87. https://hrcak.srce.hr/12906. Citirano 19.10.2021.
Chicago 17th Edition
Blanchart, Eric, Martial Bernoux, Xavier Sarda, Marcos Siqueira Neto, Carlos C. Cerri, Marisa Piccolo, Jean-Marie Douzet, Eric Scopel i Christian Feller. "Effect of Direct Seeding Mulch-Based Systems on Soil Carbon Storage and Macrofauna in Central Brazil." Agriculturae Conspectus Scientificus 72, br. 1 (2007): 81-87. https://hrcak.srce.hr/12906
Harvard
Blanchart, E., et al. (2007). 'Effect of Direct Seeding Mulch-Based Systems on Soil Carbon Storage and Macrofauna in Central Brazil', Agriculturae Conspectus Scientificus, 72(1), str. 81-87. Preuzeto s: https://hrcak.srce.hr/12906 (Datum pristupa: 19.10.2021.)
Vancouver
Blanchart E, Bernoux M, Sarda X, Siqueira Neto M, Cerri CC, Piccolo M i sur. Effect of Direct Seeding Mulch-Based Systems on Soil Carbon Storage and Macrofauna in Central Brazil. Agriculturae Conspectus Scientificus [Internet]. 2007 [pristupljeno 19.10.2021.];72(1):81-87. Dostupno na: https://hrcak.srce.hr/12906
IEEE
E. Blanchart, et al., "Effect of Direct Seeding Mulch-Based Systems on Soil Carbon Storage and Macrofauna in Central Brazil", Agriculturae Conspectus Scientificus, vol.72, br. 1, str. 81-87, 2007. [Online]. Dostupno na: https://hrcak.srce.hr/12906. [Citirano: 19.10.2021.]

Sažetak
Soils represent a large carbon pool, approximately 1500 Gt, equivalent to almost three times the quantity stored in terrestrial biomass and twice the amount stored in the atmosphere. Any modification of land-use or land management can induce variations in soil carbon stocks, even in agricultural systems that are perceived to be in a steady state. These modifications also alter soil macrofauna that is known to affect soil carbon dynamics. Direct seeding Mulch-based Cropping (DMC) systems with two crops per year without soil tillage have widely been adopted over the last 10 to 15 years in the Cerrado (central region) of Brazil. They are replacing the traditional soybean monocropping with fallow under conventional tillage (CT). The objective of this study was to examine how DMC practices affect soil organic carbon (SOC) dynamics and macrofauna (Rio Verde, Goias State). The approach was to determine soil C stocks and macrofauna in five fields under DMC aged 1, 5, 7, 11 and 13 years. In order to compare DMC systems with the native system of the region and previous land-use, a situation under native Cerrado (tree-savanna like vegetation) and a field conducted traditionally (CT) were also studied. Soil C stocks were calculated for the 0-10 and 0-40 cm soil depth and also for the first 400 kg m-2 of soil to compare the same amount of soil and to suppress the potential artefact of soil compaction when sample is based on fix layer depth. Soil macrofauna was hand-sorted from soil monoliths (30 cm depth, TSBF method). In our study, the annual rate of carbon storage was equal to ca. 1.6 MgC ha-1, which is in the range of values measured for DMC in different areas of Brazil, i.e., 0.4 to 1.7 MgC ha-1 with the highest rates obtained in the Cerrado region. Compared to natural vegetation, soil macrofauna in cropped systems was strongly modified. In CT, biomass and density were very low and much lower than in DMC systems. With increasing age of DMC, total macrofauna density increased and then decreased while total macrofauna biomass continuously increased due to a strong increase in Coleoptera larvae biomass. These modifications in macrofauna density and biomass are discussed with regard to soil SOC dynamics (decomposition, mineralization and physical protection).

Ključne riječi
Brazil; Cerrado; carbon storage; earthworms; Coleoptera larvae

Hrčak ID: 12906

URI
https://hrcak.srce.hr/12906

Posjeta: 1.091 *