Drain flow and related salt losses as affected by phosphogypsum amendment in reclaimed marsh soils from SW Spain

Hurtado, María del Pilar; Enamorado, Santiago M.; Andreu, L.; Delgado, Antonio; Abril, J.M.

doi:10.1016/j.geoderma.2010.12.004

Cited by 17 publications

(17 citation statements)

References 39 publications

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“…The decreased size of fruits has been observed as a consequence of salinity (Magán et al, 2008) which in this case could be the consequence of the solubilisation of Ca sulphate. This may promote an increase in Na salts in the soil solution after the displacement of Na from exchange sites by Ca as described previously in the same soil by Hurtado et al (2011b). The increased EC in the soil extract (Table 1) due to PG supports the hypothesis of an increase in soluble salts in soil solution.…”

Section: Discussionsupporting

confidence: 83%

“…This is the likely consequence of a decreased content of exchangeable Mg and K (Peregrina et al, 2008) or an antagonism between Ca and the other nutrients (Marschner, 1995) and contrasts with previous works in acidic soils, where the application of gypsum or phosphogypsum did not result in a negative effect on K or Mg nutrition of tomato plants (Favaretto et al, 2008; Rani & Khetarpaul, 2009). In this soil, the application of PG at usual rates (20 Mg ha -1 ) was found to significantly decrease the content of exchangeable Mg, but not that of exchangeable K (Hurtado et al, 2011b).…”

Section: Discussioncontrasting

confidence: 75%

“…This increased Na availability could promote a toxicity effect in sodic soils if leaching is not sufficiently applied to remove Na salts from the soil, which is not the case in reclaimed marsh soils from the Guadalquivir Valley with low Na saturation in the exchange complex. On the other hand, the increased Ca activity in the solution of this soil by PG application (Hurtado et al, 2011b) can explain the decreased K and Mg concentration in shoots (Table 3), the decreased K concentration in fruits (Table 4) and the negative effect of PG rates applied at 60 Mg ha -1 on the total content of K and Mg in aerial parts (Table 5). This is the likely consequence of a decreased content of exchangeable Mg and K (Peregrina et al, 2008) or an antagonism between Ca and the other nutrients (Marschner, 1995) and contrasts with previous works in acidic soils, where the application of gypsum or phosphogypsum did not result in a negative effect on K or Mg nutrition of tomato plants (Favaretto et al, 2008; Rani & Khetarpaul, 2009).…”

Section: Discussionmentioning

confidence: 94%

“…The general properties of this soil can be found in Delgado et al (2006) and Hurtado et al (2011b). The soil was clayish (85, 372 and 543 g kg -1 of sand, silt and clay, respectively); with 6.4 and 235 g kg -1 of organic carbon and calcium carbonate equivalent concentration, respectively; 32 cmol c kg -1 of cation exchange capacity (CEC); and a pH of 8.1.…”

Section: Soil Characteristicsmentioning

confidence: 99%

“…Electrical conductivity (EC) and pH were determined in 1:2.5 soil to water extract and concentrations of B, Mn, Fe, Ni, Cu, Zn and Mo determined as described for plant material (after microwave assisted digestion with concentrated HNO 3 of Suprapure grade following the same procedure than for plants). This digestion method applied to soil samples provides a reasonable estimation of the soil enrichment in the elements mentioned above, eliminating bias introduced by the variable amount of non-reactive residual material (Enamorado et al, 2013).The effect of PG on other nutrients (P, Ca, Mg and K) and Na in the soil was not studied here since it is well-known from previous works using the same soil Hurtado et al, 2011b).…”

Section: Soil Sampling and Analysismentioning

confidence: 99%

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Phosphogypsum amendments and irrigation with acidulated water affect tomato nutrition in reclaimed marsh soils from SW Spain

Quintero

Enamorado

Mas

et al. 2014

Span. j. agric. res.

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Phosphogypsum (PG) is a by-product of the P fertilizer industry usually valorised as amendment for acidic and sodic soils. This work was aimed to study the effects of PG on nutrient uptake by industrial tomato plants in an originally sodic soil. A completely randomized experiment was performed involving two factors: (i) acidification with nitric acid (mimics cleaning techniques in drip irrigation), and (ii) PG rate (equivalents to 0, 20, 60, and 200 Mg ha–1). The highest PG rate resulted in an increased dry matter yield, which can be ascribed at least in part to an increased water use efficiency. PG decreased K, Mg and P concentrations in shoots, and P and Cu concentrations in fruits. At the highest rate, PG increased B concentration in shoots and total B content in the aerial parts of plants when acid was applied. The highest PG rate also increased Ca concentration in fruits, which can be considered positive in view of reducing the incidence of blossom end rot. The total content of Ni and Mo in aerial parts increased with PG, probably related to a decreased adsorption of these nutrients in soils. Acid application increased the concentration of all micronutrients in shoots and the concentration of Fe, Cu and B in fruits. In conclusion, PG promoted positive effects on B, Ni, Mo, and Ca nutrition, and some negative nutritional effects through antagonisms or affecting nutrient cycling in the soils, which however did not result in decreasing yields, even at a large dose which mimics the cumulative application during 20-30 years. Acid treatments resulted in improved micronutrient nutrition of tomato plants.

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Section: Discussionsupporting

confidence: 83%

Section: Discussioncontrasting

confidence: 75%

Section: Discussionmentioning

confidence: 94%

Section: Soil Characteristicsmentioning

confidence: 99%

Section: Soil Sampling and Analysismentioning

confidence: 99%

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Phosphogypsum amendments and irrigation with acidulated water affect tomato nutrition in reclaimed marsh soils from SW Spain

Quintero

Enamorado

Mas

et al. 2014

Span. j. agric. res.

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Nitrate loss from a tile-drained reclaimed marsh soil from SW Spain amended with different products

Hurtado

Andreu

Abril

et al. 2011

Nutr Cycl Agroecosyst

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Tile drainage and soil amendments have been found to affect losses of nitrate N from agricultural soils. This work was aimed at measuring nitrate N losses in a tile-drained marsh soil from SW Spain under traditional fertilization and irrigation practices, and how these losses were influenced by the application of soil amendments. To this end, a randomised block experiment with three replications was performed during two consecutive growing seasons-2003 to 2004 with cotton and sugar beet, respectivelyinvolving four different amendment treatments: (1) control without amendment, (2) phosphogypsum (PG), (3) manure, and (4) sugar factory refuse lime (SFRL). Flow-weighted (FW) nitrate-N concentrations in drainage water, estimated as the slope of the regression of the instantaneous nitrate-N flow as a function of drain flow rate, was decreased by PG in some drainage events in the 2003 season and in the four last events of the 2004 season when compared with control without amendment. The increased FW nitrate-N concentrations in drainage from SFRL in comparison to control in a drainage event of 2003 season, and in the four last events of 2004, can be explained by the contribution of N present in the amendment. These effects did not account for significant differences in nitrate-N loss among treatments over the whole season in 2003, when they ranged from 19.3 to 24.9 kg N ha -1 , accounting for 6-8% of applied N, nor in 2004, when they ranged from 4 to 6 kg N ha -1 , accounting for 3-4% of applied N. The decrease in mean FW nitrate-N concentration after the third drainage event in 2003 was not the consequence of the depletion of total soil nitrate-N because soil mineral N was increased on average by 205 kg N ha -1 during the season. The high N extractions by sugar beet and the subsequent decrease in total soil nitrate-N can contribute to explain the decrease of mean FW nitrate-N concentrations along the 2004 season. Greater absolute nitrate-N loss in 2003 than in 2004 was explained by the lower efficiency of the furrow irrigation when compared with sprinkler irrigation. Results also revealed that traditional management of N fertilizer was inadequate: rates applied to cotton were excessive, increasing the risk of N losses not only during the cotton season, but also at the beginning of the following season.Keywords Drainage Á Furrow Á Sprinkler Á Nitrate Á Phosphogypsum Á Manure María Dolores Hurtado died in February 2010. The present work was a part of her unfinished Ph. D. Thesis. Her colleagues and friends wish to dedicate this article to her memory.

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Effect of phosphogypsum on growth, physiology, and the antioxidative defense system in sunflower seedlings

Elloumi¹,

Zouari

Chaâri³

et al. 2015

Environ Sci Pollut Res

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Phosphogypsum (PG) is the solid waste product of phosphate fertilizer production and is characterized by high concentrations of salts, heavy metals, and certain natural radionuclides. The work reported in this paper examined the influence of PG amendment on soil physicochemical proprieties, along with its potential impact on several physiological traits of sunflower seedlings grown under controlled conditions. Sunflower seedlings were grown on agricultural soil substrates amended with PG at rates of 0, 2.5, and 5 %. The pH of the soil decreased but electrical conductivity and organic matter, calcium, phosphorus, sodium, and heavy metal contents increased in proportion to PG concentration. In contrast, no variations were observed in magnesium content and small increases were recorded in potassium content. The effects of PG on sunflower growth, leaf chlorophyll content, nutritional status, osmotic regulator content, heavy metal accumulation, and antioxidative enzymes were investigated. Concentrations of trace elements in sunflower seedlings grown in PG-amended soil were considerably lower than ranges considered phytotoxic for vascular plants. The 5 % PG dose inhibited shoot extension and accumulation of biomass and caused a decline in total protein content. However, chlorophyll, lipid peroxidation, proline and sugar contents, and activities of antioxidant enzymes such as superoxide dismutase and catalase increased. Collectively, these results strongly support the hypothesis that enzymatic antioxidation capacity is an important mechanism in tolerance of PG salinity in sunflower seedlings.

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Drain flow and related salt losses as affected by phosphogypsum amendment in reclaimed marsh soils from SW Spain

Cited by 17 publications

References 39 publications

Phosphogypsum amendments and irrigation with acidulated water affect tomato nutrition in reclaimed marsh soils from SW Spain

Phosphogypsum amendments and irrigation with acidulated water affect tomato nutrition in reclaimed marsh soils from SW Spain

Nitrate loss from a tile-drained reclaimed marsh soil from SW Spain amended with different products

Effect of phosphogypsum on growth, physiology, and the antioxidative defense system in sunflower seedlings

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