| Journal: | Terra latinoamericana (Edo. de Méx.) |
| Database: | PERIÓDICA |
| System number: | 000408729 |
| ISSN: | 1870-9982 |
| Authors: | Matus, Francisco1 Garrido, Estrella2 Hidalgo, Claudia3 Paz, Fernando3 Etchevers, Jorge3 Merino, Carolina1 Báez, Aurelio4 |
| Institutions: | 1Universidad de La Frontera, Temuco, Cautín. Chile 2Universidad Católica del Maule, Escuela de Agronomía, Talca. Chile 3Colegio de Postgraduados, Campus Montecillo, Montecillo, Estado de México. México 4Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias, Texcoco, Estado de México. México |
| Year: | 2016 |
| Season: | Jul-Sep |
| Volumen: | 34 |
| Number: | 3 |
| Pages: | 311-319 |
| Country: | México |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, analítico |
| English abstract | The silt and clay particles play a key role as stabilizing agents of soil organic carbon (SOC). Several lines of evidence indicate a theoretical maximum or C saturation in individual particles. In the present study, we hypothesized that a C fraction displaying linear accumulation relative to the SOC is not influenced by C saturation, while a fraction displaying an asymptotic relationship is regarded as saturated (Stewart et al., 2008). The aim of the present study was to compare the amount of C in the silt and clay sized fractions in temperate and subtropical cropping soils across a range of textures with different mineralogy. Twenty-one and 18 soil samples containing 1:1 and 2:1 clay of temperate soil from Chile under monoculture of maize (Zea maiz L.) for at least 30 years and 9 subtropical soils from Mexico under maize and bean (Phaseolus vulgaris L.) cropping for 9 years having mixed clay were collected at 0-0.1 m. The SOC of 2:1 soils was significantly higher (14±0.5 g kg-1 dry soil) than 1:1 soils (10±0.7 g kg-1). However, subtropical soils showed the highest values (59±0.5 g kg-1). A positive (P < 0.01) relationship was observed between the SOC and the C in the silt fraction (R2 0.80-0.97, P < 0.01). In contrast, the clay fraction remained constant or showed asymptotic behavior. We conclude that the silt fraction, unlike clay, showed no evidence of C saturation, while clay accumulates C to a maximum. On average, the 2:1 clay was saturated at 1-2 g C kg-1 and 1:1 at 1 g C kg-1, and subtropical soils at 14 g C kg-1 |
| Disciplines: | Agrociencias, Geociencias |
| Keyword: | Suelos, Mineralogía, petrología y geoquímica, Saturación del carbono, Carbono orgánico en los suelos (COS), Limo, Arcillas, Mineralogía, Edafología |
| Keyword: | Agricultural sciences, Earth sciences, Soils, Mineralogy, petrology and geochemistry, Carbon saturation, Soil organic Carbon (SOC), Silt, Clays, Mineralogy, Edaphology |
| Full text: | Texto completo (Ver HTML) |
