Influences of organic fertilization and solarization in a greenhouse on particle-size fractions of a Mediterranean sandy soil

Thuriès Laurent, Larré-Larrouy Marie-Christine, Feller Christian. 2000. Influences of organic fertilization and solarization in a greenhouse on particle-size fractions of a Mediterranean sandy soil. Biology and Fertility of Soils, 32 (6) : 449-457.

Résumé : The effects of a composted organic amendment and solarization on the organic matter (OM) of a sandy soil were determined by means of particle-size fractionation and analysis of carbon and nitrogen contents. After 2 years, total soil carbon increased under organic fertilization but did not significantly change with solarization. As a consequence of the climatic conditions in the greenhouse, the carbon concentrations (g kg–1 fraction) of the particle-size fractions were lower than those found for temperate soils and closer to those for tropical soils. The carbon amounts (g kg–1 soil) and carbon:nitrogen ratios, which were highest in fractions >200 μm, reflected the short-term influence of the industrially processed organic amendment, rich in composted coarse plant debris. In contrast, the characteristics of the OM associated with each fraction were not significantly affected by solarization. In comparison with other coarse-textured temperate or tropical soils, carbon concentrations in fine silt (2–20 μm) and clay (0–2 μm) fractions were very low. This suggests a "greenhouse effect", together with a high rate of carbon mineralization affecting fine silt and clay fractions.

Classification Agris : F04 - Fertilisation
P35 - Fertilité du sol
P33 - Chimie et physique du sol
F01 - Culture des plantes

Auteurs et affiliations

• Thuriès Laurent, IRD (FRA) ORCID: 0000-0002-1365-7891
• Larré-Larrouy Marie-Christine, IRD (FRA)
• Feller Christian, IRD (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/578456/)

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