Catálogo CEIBA de la Biblioteca Central de FAUBA


Vista normal Vista MARC Vista ISBD

Soil carbon and phosphorus pools in field crop rotations in pampean soils of Argentina

Por: Ciampitti, I. A.
Colaborador(es): García, Fernando Oscar | Picone, Liliana Inés | Rubio, Gerardo.
ISSN: 0361-5995.Tipo de material: Artículos y capítulos. Recurso electrónico.Tema(s): CORN [ZEA MAYS L.] | CROP MANAGEMENTS | CROPPING SYSTEMS | GLYCINE MAX | IN-FIELD | MEDIUM TERM | PARTICULATE ORGANIC MATTERS | POTENTIAL INDICATORS | SOIL CARBON | SOIL DEPTH | SURFACE SOIL LAYERS | TOTAL ORGANIC C | VERTICAL DISTRIBUTIONS | WHEAT [TRITICUM AESTIVUM L.] | AMINO ACIDS | CROPS | NITROGEN FIXATION | PHOSPHORUS | RATING | SOILS | AGRICULTURAL SOIL | BIOAVAILABILITY | CROP ROTATION | EXPERIMENTAL STUDY | FERTILIZER APPLICATION | MAIZE | NUTRIENT AVAILABILITY | NUTRIENT UPTAKE | PARTICULATE ORGANIC MATTER | SIZE DISTRIBUTION | SOIL CARBON | SOYBEAN | TOTAL ORGANIC CARBON | TRANSFORMATION | VERTICAL DISTRIBUTION | WHEAT | ARGENTINA | PAMPAS | Recursos en línea: Haga clic para acceso en línea | LINK AL EDITOR. En: Soil Science Society of America Journal vol.75, no.2 (2011) p.616-625Resumen: In temperate cropping systems, a better understanding of soil C and P transformations is pertinent to evaluate crop management consequences in the medium term. Six-year cropping systems experiments consisting of corn [Zea mays L.]-double-cropped wheat [Triticum aestivum L.]/soybean [Glycine max [L.] Merr.] [two sites] and corn-soybean-double-cropped wheat/soybean [two sites], with [Fp] or without P added [Wp], were evaluated in the Pampean soils of Argentina. The objectives were [i] to quantify the effects of continuous P fertilization on the size and vertical distribution of C and P in total organic C [TOC] and particulate organic matter [POM] fractions and [ii] to evaluate the POM-P fraction as a potential indicator of crop P availability. Annually, an average P rate of 34 kg P ha -1 was applied in Fp plots. The TOC, total P [TP], POM-C, and POM-P were measured in the 0- to 5-, 5- to 10-, and 10- to 20-cm soil depths at the end of the 6-yr period. Phosphorus fertilization increased TOC from 0.5 to 2.5 g C kg -1 and TP from 24.1 to 77.4 mg P kg -1 in the 0- to 20-cm depth. The POM-C and POM-P fractions were more sensitive than TOC or TP to P fertilization, increasing by 14 and 47 percent, respectively, in the 0- to 20-cm depth under continuous P addition. The greatest diff erences in POM-C and POM-P among treatments occurred in the surface soil layer. A signifi cant relationship was found between POM-P and corn P uptake at anthesis.
Etiquetas de esta biblioteca: No hay etiquetas de esta biblioteca para este título. Ingresar para agregar etiquetas.
    valoración media: 0.0 (0 votos)

In temperate cropping systems, a better understanding of soil C and P transformations is pertinent to evaluate crop management consequences in the medium term. Six-year cropping systems experiments consisting of corn [Zea mays L.]-double-cropped wheat [Triticum aestivum L.]/soybean [Glycine max [L.] Merr.] [two sites] and corn-soybean-double-cropped wheat/soybean [two sites], with [Fp] or without P added [Wp], were evaluated in the Pampean soils of Argentina. The objectives were [i] to quantify the effects of continuous P fertilization on the size and vertical distribution of C and P in total organic C [TOC] and particulate organic matter [POM] fractions and [ii] to evaluate the POM-P fraction as a potential indicator of crop P availability. Annually, an average P rate of 34 kg P ha -1 was applied in Fp plots. The TOC, total P [TP], POM-C, and POM-P were measured in the 0- to 5-, 5- to 10-, and 10- to 20-cm soil depths at the end of the 6-yr period. Phosphorus fertilization increased TOC from 0.5 to 2.5 g C kg -1 and TP from 24.1 to 77.4 mg P kg -1 in the 0- to 20-cm depth. The POM-C and POM-P fractions were more sensitive than TOC or TP to P fertilization, increasing by 14 and 47 percent, respectively, in the 0- to 20-cm depth under continuous P addition. The greatest diff erences in POM-C and POM-P among treatments occurred in the surface soil layer. A signifi cant relationship was found between POM-P and corn P uptake at anthesis.

No hay comentarios para este ítem.

Ingresar a su cuenta para colocar un comentario.

Av. San Martín 4453 - 1417 – CABA – Argentina.
Sala de lectura de Planta Baja: bibliote@agro.uba.ar (54 11) 5287-0013
Referencia: referen@agro.uba.ar (54 11) 5287-0418
Hemeroteca: hemerote@agro.uba.ar (54 11) 5287-0218