The effect of particle size on North Carolina phosphate rock on its dissolution in soil and on levels of bicarbonate-soluble phosphorus

Kanabo, I. A. K.; Gilkes, R. J.

doi:10.1007/bf01050675

Cited by 21 publications

(13 citation statements)

References 14 publications

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“…The increased resin-P, 0.1 M sodium hydroxide (NaOH)-P i and 0.1 M NaOH-P o concentrations were caused by the high degree of BGPR dissolution of 57-69% (Table 3B). This high degree of dissolution of BGPR is due to the acidic nature of the soil, the long period of experimental time (10 months) and very small particle size of BGPR used (150-250 µm) (Kanabo and Gilkes, 1988). The high P retention (92%) and low Ca concentration in the Allophanic Soil would also have promoted the enhanced dissolution of BGPR in the soil (Kanabo and Gilkes, 1987;Bolan et al, 1997).…”

Section: Bgpr Dissolution and Soil P Fractionsmentioning

confidence: 99%

Effect of Mycorrhizal Inoculation on Rhizosphere Properties, Phosphorus Uptake and Growth of Pine Seedlings Treated With and Without a Phosphate Rock Fertilizer

Liu

Loganathan

Hedley

et al. 2007

Journal of Plant Nutrition

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A pot trial was carried out for 10 months to investigate the effects of ectomycorrhizal (ECM) fungal infection and phosphorus (P) fertilization on the growth of newly germinated Pinus radiata D. Don seedling, P uptake by the seedlings and rhizosphere properties. The experiment consisted of two phosphate rock (PR)-P application rates [0 and 100 mg P kg −1 soil supplied as Ben Guire PR (BGPR)] and 5 soil treatments (autoclaved soil, fungicide-treated soil, untreated natural soil, and Rhizopogon rubescens Tul. and Suillus luteus (L. ex. Fr.) S. F. Gray inoculated soils). The results showed that the treatment effects were more striking in P-fertilized treatments. In P-fertilized soils, all the non-autoclaved treatments significantly increased seedling growth and P concentration and P uptake in plant tissues compared with the autoclaved treatment. The ECM inoculation produced greater phosphatase activities, higher oxalate concentration, and more plant-available P (soil solution P and resin extractable P) in the rhizosphere soils than in the bulk soils in P-fertilized soil. Compared with S. luteus, R. rubescens inoculation resulted in greater ECM tip density in seedling roots in P-fertilized treatments, indicating that R. rubescens are more susceptible to infection of radiata seedling roots. Approximately 57-69% of the BGPR added to the soil had been dissolved in 10 months after application and BGPR significantly increased seedling height, ECM root tip density, and P concentration in shoots in both autoclaved and non-autoclaved treatments.

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Section: Bgpr Dissolution and Soil P Fractionsmentioning

confidence: 99%

Effect of Mycorrhizal Inoculation on Rhizosphere Properties, Phosphorus Uptake and Growth of Pine Seedlings Treated With and Without a Phosphate Rock Fertilizer

Liu

Loganathan

Hedley

et al. 2007

Journal of Plant Nutrition

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“…As S oxidising bacteria are widely found in Australian soils (Vitolins and Swaby 1969) the poor efficacy of Biosuper in southern Australia may have resulted from climatic limitations, low reaction of the PR used in the blend, or the large particle size: smaller particle sizes of both RPR (Kittams and Attoe 1965;Kanabo and Gilkes 1988;Watkinson 1994) and S (Attoe and Olsen 1966;Germida and Janzen 1993) favour their chemical reaction.…”

Section: Introductionmentioning

confidence: 99%

Application of reactive phosphate rock and sulphur fertilisers to enhance the availability of soil phosphate in organic farming

Evans

McDonald

Price

2006

Nutr Cycl Agroecosyst

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Plant available soil phosphate is frequently deficient for crop and pasture production on organic farms in southern Australia. Improved P management, including developing a fertiliser product conforming to organic farming regulations, is required to sustain and increase production on these farms. Reactive phosphate rock (RPR) and elemental sulphur (S) are natural products. Field and pot experiments were established to measure the impact of ground RPR, and co-treatment of RPR with finely ground S, on available soil phosphate (Olsen P), plant dry matter, and the P concentration (%) and content (kg P ha -1

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“…The PR from Gafsa used in this work is one of the more reactive PR existing in the World (Zapata and Roy 2007); and in some soils it showed to have a same relative agronomic efficiency compared to TSP when both P-sources were used in glasshouse experiments (Truong 2004). The PR used here was powdered before applying to soil and, reducing particle size increases the PR dissolution (Kanabo and Gilkes 1988a). The PR was homogeneously mixed with the soil, and increasing the area contact of PR with soil enhanced PR dissolution (Kanabo and Gilkes 1988b).…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies suggest that PR from North Caroline (USA), Gafsa (Tunisia) and Sechura (Peru) are the more reactive PRs available in the World (Rajan et al 1996;Zapata and Roy 2007). In addition, the finer of the particle size in a given PR, the greater rate of dissolution (Kanabo and Gilkes 1988a).…”

Section: Introductionmentioning

confidence: 99%

How do soil P tests, plant yield and P acquisition by Lotus tenuis plants reflect the availability of added P from different phosphate sources

Mendoza

Lamas

García

2009

Nutr Cycl Agroecosyst

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The relative effectiveness (RE) of each one of three different sources of P-P in solution (Psol), triple superphosphate (TSP) and phosphate rock (PR)-for reflecting the availability of P in a P-deficient soil were assessed by measuring in Lotus tenuis variables associated with growth, organ morphology, and plant tissue P-content together with the amounts of P extracts from soil by two of the currently used soil-P tests-Bray I and Olsen. A hyperbolic equation was used to fit the response curves of each one of those plant variables to added-P. The ratio between the shapes of paired response curves of any P-sources was used to compute the RE and substitution rate (K) of one source relative to the other. More P was needed from TSP and PR compared to Psol-100% soluble P-source. On the average P applications as TSP relative to Psol and PR relative to TSP were only 68 and 63% effective respectively for plant growth. Plant roots were more sensitive than soil-P tests to detect shifts in P-availability from different P-sources. Because soil tests are commonly used to estimate the current P status in soil in order to calculate the optimum application levels of fertilizer P for a crop or pasture, these results would have practical agronomical consequences if reproduced in other cultivated species because they show that the response curve of a plant species as a function of added P and soil test might differ among fertilizer types, measured plant variables, and the test used to measure P availability in the soil.

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The effect of particle size on North Carolina phosphate rock on its dissolution in soil and on levels of bicarbonate-soluble phosphorus

Cited by 21 publications

References 14 publications

Effect of Mycorrhizal Inoculation on Rhizosphere Properties, Phosphorus Uptake and Growth of Pine Seedlings Treated With and Without a Phosphate Rock Fertilizer

Effect of Mycorrhizal Inoculation on Rhizosphere Properties, Phosphorus Uptake and Growth of Pine Seedlings Treated With and Without a Phosphate Rock Fertilizer

Application of reactive phosphate rock and sulphur fertilisers to enhance the availability of soil phosphate in organic farming

How do soil P tests, plant yield and P acquisition by Lotus tenuis plants reflect the availability of added P from different phosphate sources

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