Soil organic matter effects on plant available and water soluble phosphorus

Ohno, Tsutomu; Hoskins, Bruce R.; Erich, M. Susan

doi:10.1007/s00374-006-0150-1

Cited by 31 publications

(22 citation statements)

References 34 publications

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“…Soluble organic molecules inhibit the sorption of P through direct competition with ligand exchange sites and through the formation of soluble complexes with metals that would otherwise precipitate P (Iyamuremye and Dick, 1996;Ohno and Crannell, 1996). However, similar results were observed in a recent study where soils with higher SOM were associated with a lower DPS (Ohno et al, 2007). The phosphorus sorption maximum may be higher in (silt + clay)-sized particles with greater SOM concentration due to several mechanisms: (1) lesser amounts of P sorbed than the water-stable aggregate fractions with lower levels of SOM concentrations; (2) greater amounts of oxalateextractable Al and Fe because they have greater amounts of native metal oxides; or (3) greater amounts of oxalate-extractable Al and Fe due to greater amounts of organically complexed Al and Fe.…”

Section: Phosphorus Sorption Characteristics Of Aggregate-sized Classessupporting

confidence: 70%

Tillage practices of a clay loam soil affect soil aggregation and associated C and P concentrations

et al. 2011

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Section: Phosphorus Sorption Characteristics Of Aggregate-sized Classessupporting

confidence: 70%

Tillage practices of a clay loam soil affect soil aggregation and associated C and P concentrations

et al. 2011

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“…The release of P in the incubation experiment and the uptake of P in the greenhouse experiment in the same year were lower for soil B than soil A (Figure 1, Table IV). This agrees with previous findings by Ohno et al (2007) that a higher SOM level is associated with higher P sorption capacity and lower sorption site occupancy. Börling et al (2001) and Zhang et al (2005) suggest that this association is the result of P sorbed by Al and Fe associated with SOM.…”

Section: Discussionsupporting

confidence: 83%

“…A study by Ohno et al (2007) showed that soils with high levels of SOM tended to have less P in solution than soils with lower levels of organic matter. The higher SOM levels were associated with higher levels of oxalate-extractable Fe and Al, and therefore higher P sorption capacity and lower sorption site occupancy.…”

Section: Introductionmentioning

confidence: 99%

Availability of phosphorus in greenhouse cropping systems with tomatoes – influence of soil and citric acid

Båth¹,

Otabbong²

2013

Acta Agriculturae Scandinavica, Section B - Soil & Plant Sc

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Analyses of plant sap from organic greenhouse tomato crops show that the levels of phosphorus (P) are frequently low, despite the fact that soil analyses indicate P status in the soil to be good. In the present study, two soils (A and B) with a pH just over 6 and a high total content of N and P were investigated with respect to release of P and uptake in a tomato crop. The fertilisers primarily used on soil A was silage and bloodmeal, and on soil B Vinasse and blood meal. An incubation experiment showed that the release of P per unit time was greater from soil A than soil B. This difference between the two soils may be due to lower soil organic matter concentration, with less P sorbed by Al and Fe on soil A, and a fertiliser regime which favours a high concentration of dissolved organic carbon in this soil. Tomato plants grown for 10 weeks in the soils had greater DW production, total uptake of P and concentration of P in the leaves on soil A than on soil B. Addition of citric acid to the soils in order to mobilise P increased plant yield and uptake of N and P on soil A. Despite the increased growth, the concentration of P in plant leaves increased and the N concentration was unchanged. On soil B addition of citric acid decreased Zn uptake in the tomato plants despite good availability, resulting in a lower concentration of this micronutrient in the leaves. The plants on soil A maintained their concentrations of all micronutrients analysed, but the ratio of P to micronutrients increased. Thus for commercial organic tomato growers, adding citric acid with the irrigation water offers a possibility to increase P availability.

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“…This causes a deficiency of available P for plants, and, consequently, an increase in application rates of P fertilizers in agricultural systems. As a result, excess amounts of P in soils accelerate eutrophication in aquatic ecosystems due to P loss to water (van der Zee & van Riemsdijk 1986; Sims et al 1998;Weld et al 2001;Hereida & Cirelli 2007;Ohno et al 2007;Scalenghe et al 2007). Sandy soils are especially vulnerable to the twofold "P problem" of P deficiency and P-leaching.…”

Section: Please Scroll Down For Articlementioning

confidence: 98%

Organic matter effects on phosphorus sorption in sandy soils

Dębicka

Kocowicz

Weber

et al. 2015

Archives of Agronomy and Soil Science

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Phosphorus (P) sorption processes in soils contribute to important problems in agriculture: a deficiency of this plant nutrient, and eutrophication in aquatic systems. Soil organic matter (SOM) plays a major role in sorption processes, but its influence on P sorption remains unclear and needs to be elucidated to improve the ability to effectively manage soil P. The aim of this research was to investigate the influence of SOM on P sorption. The study was conducted in sandy soil profiles, and in topsoils before and after removal of SOM with H 2 O 2 .The results were interpreted with the Langmuir and Freundlich isotherms. Our results indicated that SOM affected P sorption in sandy soils, but that P sorption also depended on specific soil properties (e.g. values of degree of P saturation (DPS), P sorption capacity (PSC) and pH) often related to land use. Removal of SOM decreased P sorption capacity in most of the topsoils tested; other soil properties became important in controlling P sorption. An increase in P desorption observed after SOM removal indicated that SOM was potentially that soil constituent which increased P binding and limited P leaching from these sandy soils.

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Soil organic matter effects on plant available and water soluble phosphorus

Cited by 31 publications

References 34 publications

Tillage practices of a clay loam soil affect soil aggregation and associated C and P concentrations

Tillage practices of a clay loam soil affect soil aggregation and associated C and P concentrations

Availability of phosphorus in greenhouse cropping systems with tomatoes – influence of soil and citric acid

Organic matter effects on phosphorus sorption in sandy soils

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