Effect of phosphate status on the sorption and desorption properties of some soils of northern India

Barrow, N. J.; Debnath, Abhijit

doi:10.1007/s11104-014-2042-8

Cited by 73 publications

(80 citation statements)

References 23 publications

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“…It is generally accepted that the P buffer capacity (PBC), which is the soil solution resistance to a change in P concentration, is a crucial factor affecting equilibrium between solid and liquid phases (Holford 1980;Ehlert et al 2003;Celardin 2003). Factors such as soil P status (Barrow and Debnath 2014), the affinity of sorbent surfaces for P, or the proportion of exchangeable cations can also affect this equilibrium (Delgado et al 2010). All these factors contribute to explain the poor relationship frequently observed between a widely used index such as Olsen P (bicarbonateextractable P; Olsen et al 1954) and P uptake by plants (Kulhánek et al 2007), even in soils with similar properties (Delgado et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Accuracy of Olsen P to assess plant P uptake in relation to soil properties and P forms

Recena

Torrent

Campillo

et al. 2015

Agron. Sustain. Dev.

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Efficient use of phosphorus (P) by plants in agriculture relies on accurate estimation of the phytoavailable soil P. However, poor relationships are frequently observed between P availability indices, such as Olsen P, and P uptake by plants. We therefore studied which soil properties modify the accuracy of Olsen P as a P availability index. We conducted a soil P depletion experiment in pots with 17 soils. Two samples differing widely in Olsen P were used for each soil and named "low-P" and "high-P." Soil was mixed with siliceous sand to achieve 1 mg of Olsen P per pot, so that the ratio of non-readily available P, either inorganic P or organic P, to Olsen P in the pot was higher for low-P than for high-P samples. Results show that, in high-P samples, P uptake by cucumber is positively correlated with the affinity of the soil solid phase for P, with R 2 of 0.76. In high-P samples, P uptake by cucumber is positively correlated with total P adsorption capacity as estimated by Fe in the form of Fe oxides, with R 2 = 0.56. P uptake is positively correlated with the inorganic P released by NaOH and citrate-bicarbonate in low-P samples, with R 2 of 0.52. In low-P samples, total organic P and phosphatase activity in the rhizosphere explained 37 % of plant P uptake. In low-P samples, phosphatase activity and pH explained 50 % of plant P uptake. These findings reveal that organic P forms and hydrolytic activity by roots are explaining P availability to plants. Whereas physico-chemical processes controlling inorganic P dynamics play a major role for low organic P/Olsen P ratios.

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Section: Introductionmentioning

confidence: 99%

Accuracy of Olsen P to assess plant P uptake in relation to soil properties and P forms

Recena

Torrent

Campillo

et al. 2015

Agron. Sustain. Dev.

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“…Thus, P is less mobile and bioavailable than other macronutrients (Hinsinger 2001), which is particularly apparent in crops grown on strongly weathered soils (Raghothama and Karthikeyan 2005;DeLong et al 2013). This poor mobility requires using effective soil management systems and fertilization practices to increase the efficiency and bioavailability of P fertilizers (Barrow and Debnath 2014).…”

Section: Introductionmentioning

confidence: 99%

Diffusion and uptake of phosphorus, and root development of corn seedlings, in three contrasting subtropical soils under conventional tillage or no-tillage

et al. 2015

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Soil mineralogy and management can have substantial effects on phosphorus (P) diffusion in soil and hence on root morphology. The aim of this study was to assess these effects in soils differing widely in P-sorbing components. Samples of a Rhodic Paleudult (RP), a Rhodic Hapludox (RH), and a Humic Hapludox (HH) under conventional tillage (CT) or no-tillage (NT) were placed in Petri dishes to assess P diffusion. Performance and root morphology in corn grown on soil samples subjected to three different P fertilization treatments (no fertilizer, surface, and deep fertilizer application) were examined. Phosphorus diffusion was slower in the HH than in the other soils by effect of its high P adsorption capacity because of its mineralogy. Soil management had no effect on P diffusion. Fertilization with P only affected plant-related variables in RH: surface fertilization increased root biomass, and deep fertilization shoot biomass and proportion of thick roots. Soil management affected plants growing on HH and RP: the plants grown under NT were taller (RP) and developed more fine roots (HH) than those under CT. Fertilization with P had little effect on plant growth in the goethite-rich soil (HH) or the one with high content in available P (RP). Our results suggest that management system in these soils has therefore greater influence on fertility than fertilization treatment.

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“…For example, it has been observed that sorption is less pronounced on heavily fertilized soils, due to more negative surface charge (Barrow and Debnath, 2014). In our study, high K m values imply the presence of many potential binding sites, where P may adsorb or precipitate.…”

Section: Relationship Between Soil Solution P Turnover (K M )mentioning

confidence: 44%

“…In many low-P w soils, sorption is extremely high and the soil solution is buffered from P inputs or outputs (Barrow and Debnath, 2014). For these soils, the prevalence of sites with fast exchange rates is crucial to assure a steady flux of P to the soil solution (Fig.…”

Section: Environmental Implicationsmentioning

confidence: 99%

“…One of the most important factors among soil types is the specific surface area of Fe/Al oxides and clay minerals, which are important sites of P sorption (Gérard, 2016). Whilst the aforementioned approaches are a useful and cost effective way to study soil P dynamics (Bolland and Allen, 2003;Burkitt et al, 2002;Barrow and Debnath, 2014), they are not able to directly determine the turnover of P in the solution. Soil solution P turnover (K m ) is the mean rate of exchange between phosphate ions in solution and inorganic phosphate in soil and can be calculated from parameters determined in an isotopic exchange kinetic (IEK) experiment (Fardeau, 1996).…”

Section: Introductionmentioning

confidence: 99%

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Soil solution phosphorus turnover: derivation, interpretation, and insights from a global compilation of isotope exchange kinetic studies

et al. 2018

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Abstract. The exchange rate of inorganic phosphorus (P) between the soil solution and solid phase, also known as soil solution P turnover, is essential for describing the kinetics of bioavailable P. While soil solution P turnover (K m ) can be determined by tracing radioisotopes in a soil-solution system, few studies have done so. We believe that this is due to a lack of understanding on how to derive K m from isotopic exchange kinetic (IEK) experiments, a common form of radioisotope dilution study. Here, we provide a derivation of calculating K m using parameters obtained from IEK experiments. We then calculated K m for 217 soils from published IEK experiments in terrestrial ecosystems, and also that of 18 long-term P fertilizer field experiments. Analysis of the global compilation data set revealed a negative relationship between concentrations of soil solution P and K m . Furthermore, K m buffered isotopically exchangeable P in soils with low concentrations of soil solution P. This finding was supported by an analysis of long-term P fertilizer field experiments, which revealed a negative relationship between K m and phosphate-buffering capacity. Our study highlights the importance of calculating K m for understanding the kinetics of P between the soil solid and solution phases where it is bioavailable. We argue that our derivation can also be used to calculate soil solution turnover of other environmentally relevant and strongly sorbing elements that can be traced with radioisotopes, such as zinc, cadmium, nickel, arsenic, and uranium.

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Effect of phosphate status on the sorption and desorption properties of some soils of northern India

Cited by 73 publications

References 23 publications

Accuracy of Olsen P to assess plant P uptake in relation to soil properties and P forms

Accuracy of Olsen P to assess plant P uptake in relation to soil properties and P forms

Diffusion and uptake of phosphorus, and root development of corn seedlings, in three contrasting subtropical soils under conventional tillage or no-tillage

Soil solution phosphorus turnover: derivation, interpretation, and insights from a global compilation of isotope exchange kinetic studies

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