Priming of soil organic carbon decomposition induced by corn compared to soybean crops
The rate of soil organic carbon [CS] loss via microbial respiration [decomposition rate k, y-1], and the rate of stabilization of vegetation inputs [CV] into CS [humification rate h, y-1] are usually considered independent of CV. However, short-term laboratory studies suggest that the quality and qu...
Guardado en:
| Otros Autores: | , , , , |
|---|---|
| Formato: | Artículo |
| Lenguaje: | Español |
| Materias: | |
| Acceso en línea: | http://ri.agro.uba.ar/files/intranet/articulo/2014mazzilli.pdf LINK AL EDITOR |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
| LEADER | 03579cab a22006617a 4500 | ||
|---|---|---|---|
| 001 | AR-BaUFA000679 | ||
| 003 | AR-BaUFA | ||
| 005 | 20220808123311.0 | ||
| 008 | 181208t2014 |||||o|||||00||||spa d | ||
| 999 | |c 47075 |d 47075 | ||
| 999 | |d 47075 | ||
| 022 | |a 0038-0717 | ||
| 024 | |a 10.1016/j.soilbio.2014.04.005 | ||
| 040 | |a AR-BaUFA |c AR-BaUFA | ||
| 245 | 1 | 0 | |a Priming of soil organic carbon decomposition induced by corn compared to soybean crops |
| 520 | |a The rate of soil organic carbon [CS] loss via microbial respiration [decomposition rate k, y-1], and the rate of stabilization of vegetation inputs [CV] into CS [humification rate h, y-1] are usually considered independent of CV. However, short-term laboratory studies suggest that the quality and quantity of CV controls k, which is often referred to as a priming effect. We investigated how the chemical composition of different residues, [corn and soybean] controls k and h under field conditions in a no-till ecosystem. Using CV-driven shifts in ?13C, we estimated changes in carbon [C] stocks, k and h of both the labile particulate organic matter fraction [CPOM] and the stabilized mineral associated organic matter fraction [CMAOM]. After two years of high C inputs [corn: 4.4Mgha-1y-1 aboveground and C:N=78; soybean: 3.5Mgha-1y-1, C:N=17], we found no changes in CPOM and CMAOM stocks in the top 5-cm of soil or in deeper layers. However, CMAOM in corn had higher k [0.06y-1] and C output fluxes [0.67Mgha-1y-1] than in soybean [0.03y-1 and 0.32Mgha-1y-1], but similar rates and fluxes in CPOM in the top 5-cm of soil. In addition, while C inputs to CPOM were also similar for both crops, C inputs from CV to CMAOM were higher in corn [0.51Mgha-1y-1] than in soybean [0.19Mgha-1y-1]. Overall, corn plots had higher k and C inputs into CMAOM and therefore higher C cycling in this fraction. Our data suggests that the type of crop residue strongly influences C cycling in the topsoil of no-till cropping systems by affecting both the stabilization and the decomposition of soil organic matter. | ||
| 650 | |2 Agrovoc |9 26 | ||
| 653 | 0 | |a AGRICULTURAL WASTES | |
| 653 | 0 | |a BIODEGRADATION | |
| 653 | 0 | |a BIOGEOCHEMISTRY | |
| 653 | 0 | |a BIOLOGICAL MATERIALS | |
| 653 | 0 | |a CARBON FLUX | |
| 653 | 0 | |a CHEMICAL COMPOSITION | |
| 653 | 0 | |a COMPARATIVE STUDY | |
| 653 | 0 | |a CORN | |
| 653 | 0 | |a CROP RESIDUE | |
| 653 | 0 | |a CROPS | |
| 653 | 0 | |a DECOMPOSITION | |
| 653 | 0 | |a HUMIFICATION | |
| 653 | 0 | |a HUMIFICATION RATE | |
| 653 | 0 | |a IN-FIELD | |
| 653 | 0 | |a MAIZE | |
| 653 | 0 | |a MICROBIAL ACTIVITY | |
| 653 | 0 | |a ORGANIC COMPOUNDS | |
| 653 | 0 | |a PARTICULATE ORGANIC MATTER | |
| 653 | 0 | |a PRIMING EFFECT IN FIELD CONDITIONS | |
| 653 | 0 | |a QUALITY CONTROL | |
| 653 | 0 | |a SOIL CARBON | |
| 653 | 0 | |a SOIL ORGANIC CARBON | |
| 653 | 0 | |a SOIL ORGANIC CARBON DECOMPOSITION | |
| 653 | 0 | |a SOIL ORGANIC MATTER | |
| 653 | 0 | |a SOIL RESPIRATION | |
| 653 | 0 | |a SOILS | |
| 653 | 0 | |a SOYBEAN | |
| 653 | 0 | |a STABILIZATION | |
| 653 | 0 | |a TOPSOIL | |
| 653 | 0 | |a ZERO TILLAGE | |
| 700 | 1 | |a Mazzilli, Sebastián R. |9 71691 | |
| 700 | 1 | |a Kemanian, Armen R. |9 71692 | |
| 700 | 1 | |a Ernst, Oswaldo |9 42558 | |
| 700 | 1 | |9 67510 |a Jackson, Robert B. | |
| 700 | 1 | |9 22554 |a Piñeiro, Gervasio | |
| 773 | |t Soil Biology and Biochemistry |g vol.75 (2014), p.273-281 | ||
| 856 | |u http://ri.agro.uba.ar/files/intranet/articulo/2014mazzilli.pdf |i En reservorio |q application/pdf |f 2014mazzilli |x MIGRADOS2018 | ||
| 856 | |u http://www.elsevier.com/ |x MIGRADOS2018 |z LINK AL EDITOR | ||
| 942 | 0 | 0 | |c ARTICULO |
| 942 | 0 | 0 | |c ENLINEA |
| 976 | |a AAG | ||