A soil sequence in the natural and reclaimed marshes of the Guadalquivir river, Seville (Spain)

Moreno, F.; Martin, Jean Marie; Mudarra, J.L.

doi:10.1016/0341-8162(81)90006-0

Cited by 19 publications

(12 citation statements)

References 5 publications

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“…The soils were essentially classified as Aeric Endoaquepts (Soil Survey Staff, 1998). Detailed information about the area and its soils can be found elsewhere (Moreno et al., 1981; Domínguez et al., 2001). Mean temperature in the area varies from 10.0 (January) to 25.5°C (August).…”

Section: Methodsmentioning

confidence: 99%

“…Crops were irrigated using sprinklers at the beginning of the cycle (two first irrigations) and by furrows during the rest of the cycle. High moisture levels in relation to the irrigation system and the low hydraulic conductivity of soils (Moreno et al., 1981; Domínguez et al., 2001) are also important factors in explaining the incidence of several diseases such as black root rot (Rothrock, 1992). Fertilizer was applied at preplant [usual rates: 52 kg N/ha, 68 kg P/ha and 43 kg K/ha, using a mixture of (NH 4 ) 2 HPO 4 , urea and KNO 3 ] and sidedress (usually 250 kg N/ha as NH 4 NO 3 ).…”

Section: Methodsmentioning

confidence: 99%

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Incidence of Cotton Seedling Diseases Caused by Rhizoctonia solani and Thielaviopsis basicola in Relation to Previous Crop, Residue Management and Nutrients Availability in Soils in SW Spain

Delgado¹,

Franco²,

Paez³

et al. 2005

Journal of Phytopathology

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Cotton seedling damping-off is considered a disease complex, in which several pathogens can be involved. In SW Spain, postemergence damping-off seems to be mainly associated with Rhizoctonia solani and Thielaviopsis basicola, posing a serious limitation for crop, especially in cold springs. Ninety-seven commercial plots, where postemergence damping-off of cotton seedlings was observed during previous years, were selected in April 2001. In each plot, plants were randomly sampled between cotyledon to three true-leaf stage and soil samples besides the plants were taken.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Incidence of Cotton Seedling Diseases Caused by Rhizoctonia solani and Thielaviopsis basicola in Relation to Previous Crop, Residue Management and Nutrients Availability in Soils in SW Spain

Delgado¹,

Franco²,

Paez³

et al. 2005

Journal of Phytopathology

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“…Moreno et al (1981) reported values of saturated hydraulic conductivity < 1 mm h -1 for the heavy clay soils of the marshes of the Guadalquivir river under rice cultivation. For the reclaimed and irrigated soils of this area Moreno et al (1995) also found values of saturated hydraulic conductivity < 1 mm h -1 at a depth below 0.5 m in the soil profile.…”

Section: Methodsmentioning

confidence: 99%

Water use in three rice flooding management systems under Mediterranean climatic conditions

Aguilar

Borjas

2005

Span. j. agric. res.

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Andalusia is the main rice producing region in Spain (40,000 ha). During the last decade it has suffered several years of water shortage leading to a decrease in crop area. In this work, studies have been performed to optimise water delivery and energy costs, comparing three flooding management systems: 1) irrigating seven days a week (control system: traditional continuous flooding system), 2) five days a week and 3) four days a week (maintaining the traditional irrigation management until 55 days after seeding in both tested systems). Total water used (water delivery) in 2000 corresponded to 44,917 m 3 ha -1 (traditional), 34,445 m 3 ha -1 (five days a week) and 29,209 m 3 ha -1 (four days a week). In 2001 these values were 45,607, 34,271 and 28,958 m 3 ha -1 respectively. No significant differences (LSD > 0.05) were found among the three flooding management systems in rice growth and yield. In 2000, irrigating five days a week, 23.31% of pumping energy was saved, and 34.97% when irrigating four days a week. In 2001 these values were 24.86% and 36.51%, respectively. These improvements, combined with the generalisation of integrated production procedures, will render Andalusian rice production more sustainable.Additional key words: energy costs, flooding management, growth and yield, Oryza sativa, water deliveries, water use efficiency. ResumenUso del agua en tres sistemas de riego para arroz bajo clima mediterráneo Andalucía es la región productora de arroz más importante de España (40.000 ha). Durante la última década ha sufrido varios años de sequía en los que se ha dado un descenso de la superficie cultivada. En este trabajo, se han realizado estudios sobre la optimización del volumen de agua de riego y su coste energético mediante la comparación de tres sistemas: 1) sistema control, riego tradicional continuo (siete días por semana), 2) cinco días por semana, y 3) cuatro días por semana. En estos dos nuevos sistemas se mantuvo el riego tradicional durante los primeros 55 días tras la siembra. El volumen de agua de riego aplicada en 2000 fue de 44.917 m 3 ha -1 (sistema tradicional), 34.445 m 3 ha -1 (cinco días a la semana) y 29.209 m 3 ha -1 (4 días a la semana). En 2001 estos valores fueron de 45.607, 34.271 y 28.958 m 3 ha -1 , respectivamente. No se encontraron diferencias significativas (LSD > 0,05) en cuanto al desarrollo de la planta y a la producción entre los tres sistemas de riego ensayados. En el año 2000, regando cinco días, se ahorró el 23,31%, y regando cuatro días el 34,97% de la energía de bombeo consumida en el riego tradicional. En 2001, estos valores fueron 24,86% y 36,51%, respectivamente. Estas mejoras, junto a los ya generalizados procedimientos de producción integrada, harán la producción andaluza de arroz más sostenible.Palabras clave adicionales: coste energético, crecimiento y rendimiento en grano, dosis de riego, eficiencia del riego, manejo del agua, Oryza sativa.

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“…Due to droughts and limited water supplies in arid and semiarid regions worldwide, the reclamation of carbo‐sodic‐affected soils is important. The cultivation of naturally salt‐influenced marshland soils under Mediterranean climate conditions is of great interest because large areas are affected (Moreno et al, 1981; Sumner et al, 1998; Domínguez et al, 2001; El‐Mrabet et al, 2003). The Guadalquivir River area in southwestern Spain is a region that is dominated by clayey (illitic) Salorthidic Fluvaquents (Moreno et al, 1980; de la Rosa et al, 2009), which are characterized by high CaCO 3 contents, a high ESP of >15%, and Na adsorption ratios (SARs) of >10 mmol c L −1 .…”

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confidence: 99%

Quantification of Microstructural Changes in Salorthidic Fluvaquents Using Rheological and Particle Charge Techniques

Markgraf

Moreno

Horn

2012

Vadose Zone Journal

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Salorthidic Fluvaquents originating from Seville, Andalusia, were sampled and subjected to rheological and particle charge investigations. Structural changes in a managed and a natural site under pasture were compared based on physicochemical laboratory analyses, scanning electron microscopy, particle charge density (PCD) measurements, and rheological tests. An uncultivated site located at the riparian zone of the Guadalquivir River showed a natural fluvio‐marine‐affected development. A regular influx and exchange of salts in the groundwater, especially in the form of NaCl and calcite, dominate soil genetic processes. In contrast, drainage of the saline‐sodic soils for cultivation, furrow irrigation, and phosphogypsum fertilization have led to a modification of the salinity gradients throughout the reclaimed soil profile. Sodium ions on the exchangers were released due to the Ca amendment, which led to a decreased exchangeable Na+ concentration (exchangeable Na percentage [ESP] < 15) in the topsoil. The soil microstructure of the carbonate‐rich and clayey soil remained stable, and surface sealing and crusting were reduced, particularly in the Ap horizon. Results from PCD measurements, derived zeta potential, ζ, and the rheological parameters loss factor tanδ and integral z were consistent. Comparing reclaimed and natural conditions, the rheological parameters integral z and ζ potential showed a linear correlation to ESP and the cation ratio of soil structural stability. This was indicated by increased integral z values and ζ potentials, showing a trend toward stable agglomeration and increased microstructural strength in the case of the ameliorated reclaimed topsoil. Phosphogypsum amelioration was appraisal as successful using approach.

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A soil sequence in the natural and reclaimed marshes of the Guadalquivir river, Seville (Spain)

Cited by 19 publications

References 5 publications

Incidence of Cotton Seedling Diseases Caused by Rhizoctonia solani and Thielaviopsis basicola in Relation to Previous Crop, Residue Management and Nutrients Availability in Soils in SW Spain

Incidence of Cotton Seedling Diseases Caused by Rhizoctonia solani and Thielaviopsis basicola in Relation to Previous Crop, Residue Management and Nutrients Availability in Soils in SW Spain

Water use in three rice flooding management systems under Mediterranean climatic conditions

Quantification of Microstructural Changes in Salorthidic Fluvaquents Using Rheological and Particle Charge Techniques

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