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

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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.]...

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Detalles Bibliográficos
Autor principal: Ciampitti, Ignacio Antonio
Otros Autores: García, Fernando Oscar, Picone, Liliana Inés, Rubio, Gerardo
Formato: Artículo
Lenguaje:Inglés
Materias:
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
SOYBEAN
TOTAL ORGANIC CARBON
TRANSFORMATION
VERTICAL DISTRIBUTION
WHEAT
ARGENTINA
PAMPAS
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2011Ciampitti2.pdf
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Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
Descripción
Sumario: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.
ISSN:0361-5995

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