The agronomic effectiveness of reactive rock phosphate, partially acidulated rock phosphate and monocalcium phosphate in soils of different pH

Kumar, Vijay; Gilkes, R. J.; Bolland, M. D. A.

doi:10.1007/bf00750111

Cited by 6 publications

(5 citation statements)

References 30 publications

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“…Organic matter might also may retard adsorption of P by soil components and this could improve P-solubility in soil for maize plant (Guppy et al, 2005). On the other hand, the previous works on the agronomic effectiveness of partially acidified PR (Agyin-Birikorang et al, 2007;Kumar et al, 1993;Rajan and Watkinson, 1992;Chien and Hammond, 1989) indicated the importance of and applicability of using acidified water to facilitate and release P from BC and partially from PR and its bioavailability to maize plants. The higher P and Ca uptake by BC-fertilized plants comparing with PR in the single and PL-BC (or-PR) mixtures reflects the beneficial role of PL co-application in P availability to grown plants in calcareous soil (Fig.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Poultry Manure and Acidified Water for Improving Phosphorus Utilization from Bone Char: a comparative study

Mahmoud¹,

Saleh²,

Elrefaey

2017

Egypt.J. Soil Sci.

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A NIMAL bone char (BC) is, recently, evaluated as one of potentially sustainable sources of phosphate fertilizer to face the accelerated depletion of mined phosphate rock (PR). Further explorations are needed to investigate its behavior when applied to soils in comparison with direct application of PR. Column leaching and greenhouse experiments were carried out to evaluate and compare the behavior of both BC and PR. Results of column leaching experiments showed that water soluble phosphorus (WSP) released from BC-filled columns represented 5 to 476 folds of that released from PR columns throughout the experiment period. Mixing poultry manure (PL) with BC or PR enhanced rate of columns leaching of WSP particularly with increasing the rate of application. Leaching by acidified water significantly increased the solubility of BC-P and PR-P compared with those released in water leachates. Similar increases were only obtained in PL:BC mixtures whereas the increases in acidified WSP were observed only in PR columns and did not occurred in PL:PR mixtures. Besides the occurrence of organic fractions of P in BC, poultry litter degradation derivatives are, probably, serve as potential complexing legends with calcium and cause a further release of P from BC in water leachate. While the huge amounts of protons (H +) in acidified water play a crucial role in apatite dissolution in both sources (BC and PR). Results of P availability after leaching showed that Olsen-P was greatly higher in all columns of BC than PR. In BC columns, concentrations of formic acid-P and citric acid-P resulted from water leached columns were higher than those resulted from acidified water leached ones while; there was no significant changes in PR columns. The higher solubility and availability of BC-P than PR-P were translated in higher biomass and grain yield of maize treated by BC-P in comparison with those treated with PR-P and their mixtures with PL.

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Section: Discussionmentioning

confidence: 99%

Evaluation of Poultry Manure and Acidified Water for Improving Phosphorus Utilization from Bone Char: a comparative study

Mahmoud¹,

Saleh²,

Elrefaey

2017

Egypt.J. Soil Sci.

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“…9 Also, for party-acidulated phosphate rock, a slow P release is observed due to a low solubility, which depends on the degree of acidulation, 10 on the primary source of the phosphate rock 11 and on the soil conditions. 12 Polymer-coated soluble P fertilizers perform less in the early plant growth stages in comparison with the noncoated alternative, while the opposite is true for the later final stages, resulting in an overall higher yield and P uptake. 13 In practice, mainly multinutrient formulations (e.g., NPK) are used in coated fertilizers.…”

Section: ■ Introductionmentioning

confidence: 99%

“…In most cases, struvite has been found to be equally efficient for P fertilization as soluble P forms. − However, if slightly higher yields are obtained with struvite, this could not yet be linked to slow P release characteristics of the material . Also, for party-acidulated phosphate rock, a slow P release is observed due to a low solubility, which depends on the degree of acidulation, on the primary source of the phosphate rock and on the soil conditions . Polymer-coated soluble P fertilizers perform less in the early plant growth stages in comparison with the noncoated alternative, while the opposite is true for the later final stages, resulting in an overall higher yield and P uptake .…”

Section: Introductionmentioning

confidence: 99%

Phosphate-Exchanged Mg–Al Layered Double Hydroxides: A New Slow Release Phosphate Fertilizer

Everaert

Warrinnier

Baken

et al. 2016

ACS Sustainable Chem. Eng.

175

106

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The global phosphorus crisis provided impetus to develop fertilisers with better P use efficiency. We tested layered double hydroxides (LDHs) as slow release fertilisers with superior performance to fertilise strongly P fixing soils. Mg-Al LDHs with varying M 2+ /M 3+ ratios were synthesised as NO 3 forms and were exchanged with HPO 4 2-. XRD and XANES spectroscopy confirmed the identity of the phosphate exchanged LDH. Decreasing the M 2+ /M 3+ ratio, i.e. increasing the anion exchange capacity, increased the selectivity of P adsorption due to the increasing charge density of the LDH layers. The fertilisation efficiency of phosphate exchanged LDH (Mg/Al ratio of 2) was compared to that of a soluble P fertiliser in two P deficient soils, an acid weathered and a calcareous soil. The P-use efficiency of P-LDH in the acid soil was up to 4.5 times higher than that of soluble P. This was likely related to a liming effect of the LDH. In the calcareous soil, the P-use efficiency at low doses was only 20 % above that of soluble P, whereas it was lower at high doses. These overall encouraging results warrant further studies on the boundary conditions under which P-LDHs may outperform traditional fertilisers. KeywordsLayered double hydroxide (LDH), ion exchange, slow release fertiliser, phosphorus use efficiency, x-ray diffraction (XRD), x-ray absorption near edge structure (XANES) P use efficiency between P-LDH fertiliser and different commercial P fertilisers, including slow release fertilisers, the boundary conditions of the P-LDH use can be better determined. AcknowledgementsM.E. thanks IWT for a PhD fellowship and S.B. the Onderzoeksfonds KU Leuven for a the postdoctoral mandate. We are grateful to KU Leuven for support in the interdepartmental PB3 project. Also acknowledged are Ann Kristin Eriksson (SLU, Sweden) Dean Hesterberg (North Carolina State University, US) and Steve Hillier (James Hutton Institute, Aberdeen, UK) for compiling the XANES reference spectra. Wantana Klysubun and the staff at BL-8 at SLRI, Thailand are thanked for support and organization of the beamline. Associated contentIn the supporting information, additional details of the material stability, the XANES measurement, the anion geometry, the desorption kinetics and the pot trial are provided.

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“…In recent years, interest in researching controlled release fertilizers which include phosphate rocks and partially acidulated phosphate rocks in acid soils has been renewed (Hagin and Harrison, 1993;Rajan and Marwaha, 1993;Kumar et al, 1993). Despite the fact that coated fertilizers have been traditionally used only as controlled-release nitrogen fertilizers, Diez et al (1992) demonstrated that the use of coated phosphate fertilizers had clear advantages for controlling phosphorus fixation in calcareous soils.…”

Section: Introductionmentioning

confidence: 99%

Effect of Applying Soluble and Coated Phosphate Fertilizers on Phosphate Availability in Calcareous Soils and on P Absorption by a Rye-Grass Crop

García

Díez

Vallejo

et al. 1997

J. Agric. Food Chem.

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The agronomic effectiveness of reactive rock phosphate, partially acidulated rock phosphate and monocalcium phosphate in soils of different pH

Cited by 6 publications

References 30 publications

Evaluation of Poultry Manure and Acidified Water for Improving Phosphorus Utilization from Bone Char: a comparative study

Evaluation of Poultry Manure and Acidified Water for Improving Phosphorus Utilization from Bone Char: a comparative study

Phosphate-Exchanged Mg–Al Layered Double Hydroxides: A New Slow Release Phosphate Fertilizer

Effect of Applying Soluble and Coated Phosphate Fertilizers on Phosphate Availability in Calcareous Soils and on P Absorption by a Rye-Grass Crop

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