The effects of nitrogen fertilizer form on the plant availability of phosphate from soil, phosphate rock and mono-calcium phosphate

Apthorp, J. N.; Hedley, M. J.; Tillman, R. W.

doi:10.1007/bf01315111

Cited by 30 publications

(22 citation statements)

References 11 publications

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“…This trend is line with the observation made by Apthorp et al (1987) who indicated that, increased dissolution of phosphate rock did not occur until acidity, generated by nitrification or sulphur oxidation of the fertilizer materials, had significantly lowered soil reaction. Generally, inorganic fertilizers and other soil amendments increase the total soil nutrients levels.…”

Section: Discussionsupporting

confidence: 78%

Phosphorus release dynamics under phosphate rock and ammonium sulphate in soil amendment

Agyarko¹,

Frimpong²,

Abunyewa³

2017

Eurasian Journal of Soil Science (Ejss)

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Article Info Received : 05.01.2017 Accepted : 07.04.2017 This study was undertaken to assess the release pattern of available phosphorus in a Togo phosphate rock and ammonium sulphate soil amendment. Treatments were prepared through the combinations of soil, phosphate rock (PR) and ammonium sulphate (AS) fertilizer. The treatments were; Control, 12.5g PR, 25g PR, 12.5g PR+1g AS, 12.5g PR+2g AS, 25.0g PR+1g AS and 25.0g PR+2g AS kg -1 soil. Standard laboratory methods were used to assess pH, available phosphorus (P) and total phosphorus (P). Generally, the pH of treatments decreased to the lowest levels between the 4 th and 6 th weeks after amendment. The AS fertilizer treatments had significantly (p≤0.05) lower pH values than those without. Amendments with the 2gAS kg -1 soil had significantly (p≤0.05) lower mean pH values than those with the 1gAS kg -1 soil. The AS fertilizer treatments also had significantly (p ≤ 0.05) higher levels of the available P than those without. The higher the amount of the AS in the amendment, the higher the level of the available P concentration. Increase in the level of AS in the amendment also increased the mean value of the available P released. The peaks of available P released were observed between the 6 th and the 8 th weeks, after the lowest pH values had been attained. Decreased soil pH relatively increased the amount of phosphorus released (y = -12.47x + 111.4; R 2 =0.53). Addition of PR in the treatments increased the total P levels. In conclusion, combined application of AS and PR has the potential to increase soil P availability, which is beneficial to crop farmers.

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Section: Discussionsupporting

confidence: 78%

Phosphorus release dynamics under phosphate rock and ammonium sulphate in soil amendment

Agyarko¹,

Frimpong²,

Abunyewa³

2017

Eurasian Journal of Soil Science (Ejss)

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“…Several extractants have been used to measure increases in solution P during PR dissolution (Apthorp et al, 1987;Bolan and Hedley, 1989). Numerous studies demonstrated close relationships between Olsen-P and P uptake by plants, but NaHCO 3 extractable P often underestimates PR dissolution (Alloush, 2003).…”

Section: Discussionmentioning

confidence: 99%

Dissolution characteristics of central Florida phosphate rock in an acidic sandy soil

Yao

Calvert

et al. 2005

Plant Soil

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Florida has more than 14 million ha of acidic soils and most of these acidic soils are very sandy. Transport of phosphorus from these soils to surface water is a great concern in Florida. One of the promising approaches is to develop slow release P fertilizers to replace the regular water soluble fertilizers. Dolomite phosphate rock (DPR) is an ideal material for making this type of fertilizer for acidic sandy soils, which are wide-spread in Florida. The effects of soil moisture, particle size, and source of DPR on the extent and rate of DPR dissolution in a representative acidic sandy soil were examined in an incubation study. DPR dissolution estimated by the NaOH extraction method was strongly dependent on the mineralogy and chemistry of the DPR source materials. Decreasing particle size increased the percentage dissolution of the DPR in soil. Soil moisture affected the initial dissolution rate of the DPR and the time to reach equilibrium. Soil extractable P (Olsen-P) generally increased with DPR dissolution, but the ratios of DOlsen-P to dissolved DPR-P (DNaOH-P) were significantly different between the two DPR sources. Dissolution of DPR in the acidic sandy soil was well described by the Langmuir and Elovich kinetic equations, with the Langmuir equation being better. Constant A derived from the Elovich equation and potential maximum dissolution (PMDPR) from the Langmuir equation were closely correlated with the increases in pH and exchange (Ca + Mg) after DPR application. The two parameters appeared useful in evaluating DPR dissolution and timing of DPR application in acidic sandy soils.

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“…The form of nitrogen (N) supplied can also affect the availability of sparingly soluble P compounds (Apthorp et al 1987;Gahoonia and Nielsen 1992). The effect is attributed to the acidification or alkalization of the rhizosphere soil following assimilation of NH 4 + and NO 3 − , respectively Tang et al 2011;Troelstra et al 1985).…”

Section: Introductionmentioning

confidence: 98%

Availability of sparingly soluble phosphorus sources to cotton (Gossypium hirsutum L.), wheat (Triticum aestivum L.) and white lupin (Lupinus albus L.) with different forms of nitrogen as evaluated by a 32P isotopic dilution technique

et al. 2011

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Background & Aims Previous studies revealed that cotton plants grown on soils with low available-P were accessing significant non-fertilizer P sources. This suggests that cotton can access stable-P pools from soil. This study examined cotton's ability to utilize sparingly soluble P sources in comparison with wheat and white lupin. Methods Plants were grown for 45 days in a Vertosol supplied with AlPO 4 and hydroxyapatite, and NH 4 -N or NO 3 -N. A 32 P dilution technique was used to determine the availability and plant uptake of P from these P sources.Results Three species differed substantially in P acquisition from the P sources. When averaged over N sources, the proportion of P in shoots sourced from AlPO 4 was 89%, 54% and 19% for wheat, cotton and white lupin, respectively. When supplied hydroxyapatite, white lupin sourced 75% from the added P, in contrast to 36% for wheat and 17% for cotton. NH 4 -N nutrition increased the availability of hydroxyapatite to all the species and AlPO 4 to cotton and white lupin. Conclusion Cotton is inefficient in utilizing sparingly soluble P while wheat is efficient in mobilising AlPO 4 and white lupin is efficient in using hydroxyapatite. The superiority of wheat in AlPO 4 utilization may be related with its high root length density.Keywords 15 N . Nitrogen form . 32 P dilution . P acquisition . Sparingly soluble P sources . Species variation the high concentration of trivalent Fe and Al in the Plant Soil (2011) 348:85-98

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The effects of nitrogen fertilizer form on the plant availability of phosphate from soil, phosphate rock and mono-calcium phosphate

Cited by 30 publications

References 11 publications

Phosphorus release dynamics under phosphate rock and ammonium sulphate in soil amendment

Phosphorus release dynamics under phosphate rock and ammonium sulphate in soil amendment

Dissolution characteristics of central Florida phosphate rock in an acidic sandy soil

Availability of sparingly soluble phosphorus sources to cotton (Gossypium hirsutum L.), wheat (Triticum aestivum L.) and white lupin (Lupinus albus L.) with different forms of nitrogen as evaluated by a 32P isotopic dilution technique

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