Effect of reclamation on the structure of silty-clay soils irrigated with saline-sodic waters

• Autorzy: Cucci G. , Lacolla G. , Pagliai M. , Vignozzi N.
• Języki publikacji: EN

Abstrakty

EN

The objective of the work was to evaluate, by using the micromorphometric method, the effects of reclamation on porosity of two different clay loam soils irrigated with saline-sodic waters. Soil samples of the Ap horizon were put in cylindrical containers and irrigated with 9 types of saline-sodic waters (3 levels of salinity combined with 3 levels of sodicity). After a 4-year period, correction treatments were initiated by addition of calcium sulphate and leaching until electrical conductivity and sodium absorption ratio values of the drainage water matched 3 dS m-1 and 9, respectively. After 2 years of correction treatments, undisturbed soil samples were taken from the surface layer and soil thin sections for porosity measurements. Both soils did not show critical macroporosity values (> 10%, below this threshold a soil is classified as compact). Nevertheless, the soils exhibiteda different behaviour: total porosity of the Pachic Haploxeroll soil was not affected by difference in water salinity and alkalinity; on the contrary, the Udertic Ustochrept soil showed a lower porosity associated with higher salt concentration in the irrigation waters. This may be due to the different iron and aluminium sesquioxides content and, as a consequence, a different effect on soil aggregate stability.

Słowa kluczowe

EN

soil structure; soil porosity; salinity; image analysis; reclamation; silty soil; clay soil; irrigation; bulk density

• Wydawca: -
• Czasopismo: International Agrophysics
• Rocznik: 2015
• Tom: 29
• Numer: 1
• Opis fizyczny: p.23-30,fig.,ref.

Twórcy

autor

Cucci G.

• Department of Agricultural and Environmental Science, University of Bari “A. Moro”, Via Amendola 165/A, 70125 Bari, Italy

autor

Lacolla G.

• Department of Agricultural and Environmental Science, University of Bari “A. Moro”, Via Amendola 165/A, 70125 Bari, Italy

autor

Pagliai M.

• Agricultural Research Council Agrobiology and Pedology Research Centre CRA-ABP, Piazza D’Azeglio 30, 50121, Florence, Italy

autor

Vignozzi N.

• Agricultural Research Council Agrobiology and Pedology Research Centre CRA-ABP, Piazza D’Azeglio 30, 50121, Florence, Italy

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Identyfikatory

DOI

10.1515/intag-2015-0005