Zinc desorption kinetics in wheat (Triticum Aestivum L.) rhizosphere in some sewage sludge amended soils

Abstract

The objectives of this study were to determine Zn desorption characteristics and the correlation of these parameters with Zn extracted by DTPA-TEA method in bulk and rhizosphere amended soils with sewage sludge under greenhouse conditions by using a rhizobox. For amended soils 10 g of sewage sludge was added to 1 kg of 10 soil samples. The kinetics of Zn desorption in bulk and rhizosphere was determined by successive extraction with DTPA-TEA in a period of 1 to 504 h at 25±1 0 C. The results showed that Zn extracted using successive extraction in the rhizosphere were significantly (p<0.01) higher than in the bulk amended soils. The best model for describing extraction data for bulk and rhizosphere soils was the power function equation. The results indicated that Zn desorption rate in the wheat rhizosphere soils more than bulk soils. The results showed that significant correlation (p<0.05) between Zn desorption characteristics and DTPA-TEA-Zn were found in the bulk and rhizosphere soils. The results of this research revealed that Zn desorption characteristics that are help to estimate the Zn supplying power of soils in the wheat rhizosphere, are quite different than bulk amended with sewage sludge.

Kinetics of water‐extractable zinc release from seaweed (Fucus serratus) as soil amendment

“…The column was then filled with 300 g of 2 mm‐sieved and air‐dried soil, following the protocols of soil column set‐up for unsaturated dry‐packing ( Lewis and Sjöstrom , ; DEMEAU , ). For the treatment, 3 g of the processed F. serratus (that is, 213 ± 6 µg of zinc) was mixed evenly throughout the soil column, an application rate equivalent to 20 tonnes of seaweed per hectare ( Motaghian and Hosseinpur , ), since the mass of soil per hectare at 15 cm surface depth is 2 million kg ha −1 ( Bohn et al, ).…”

“…Recent research has investigated the potential of organic amendments as Zn fertilizers. Suitable potential sources include: sewage sludge ( Motaghian and Hosseinpur , ), green manures made from red clover and sunflower ( Aghili et al, ), poultry manure ( Ravindran et al, ), cow manure and vermicompost ( Motaghian and Hosseinpur , ), biogas slurry ( Malav et al, ; Dey et al, ), brewery waste sludge ( Ahmed et al, ), and seaweed ( Possinger , ).…”

“…In recent years, the kinetics of zinc release from different soils has drawn considerable attention as different kinetic models have been employed to describe Zn release patterns. The models include parabolic diffusion ( Dang et al, ; Taheri et al, ), power function ( Reyhanitabar and Gilkes , ; Ghasemi‐Fasaei et al, ; Motaghian and Hosseinpur , ), Elovich ( Taylor et al, ; Reyhanitabar et al, ), zero order ( Padidar , ), first order and second order equations. The models were employed to investigate the nature of reactions and zinc release patterns in acid‐leached soils ( Alghanmi et al, ; Padidar , ), DTPA‐extracted soils ( Dang et al, ; Motaghian and Hosseinpur , ), zinc sulphate‐amended and cropped soils ( Taheri et al, ).…”

“…The models include parabolic diffusion (Dang et al, 1994;Taheri et al, 2011), power function (Reyhanitabar and Gilkes, 2010;Ghasemi-Fasaei et al, 2012;Motaghian and Hosseinpur, 2013), Elovich (Taylor et al, 1995;Reyhanitabar et al, 2011), zero order (Padidar, 2015), first order and second order equations. The models were employed to investigate the nature of reactions and zinc release patterns in acid-leached soils (Alghanmi et al, 2015;Padidar, 2015), DTPA-extracted soils (Dang et al, 1994;Motaghian and Hosseinpur, 2013), zinc sulphate-amended and cropped soils (Taheri et al, 2011). Eghball et al (2002) reported that, in order to apply manure or compost to fulfil the nutrient requirements of a crop, knowledge of the amount of nutrients mineralized following application is needed as this should be considered when determining application rates.…”

Phosphorus Sorption Kinetics in Reclaimed Lignite Mine Soils under Different Age Stands ofRobinia pseudoacaciaL. in Northeast Germany

“…The Elovich equation provided an excellent data fit and was fitted to P desorption data ( Figure 8). As a suitable model for describing P desorption data, Elovich equation has been employed in numerous studies [36,37,[97][98][99][100][101][102].…”