Comparison of Phosphorus Soil Test Extractants for Plant Availability and Environmental Assessment

Magdoff, Fred; Hryshko, C.; Jokela, William E.; Durieux, R. P.; Bu, Y.

doi:10.2136/sssaj1999.634999x

Cited by 58 publications

(58 citation statements)

References 25 publications

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“…tightness of relations between P ex and phosphates estimated with the Mehlich 3 and Doppel-lactat methods shows that these methods probably did not estimate significant contents of nonbioavailable P. Significant relations between P M3 and P ex were obtained in the work of Zheng et al (2003). Close correlations between P in soil solution and P M3 was also found by Magdoff et al (1999), who reached r = 0.8 at P ≤ 0.01 in 28 noncalcareous soils. Zbíral and němec (2002) compared the P M3 and P CaCl 2 fractions using regression analysis and obtained significant relations as well (coefficient of determination r 2 = 0.56).…”

Section: Methodsmentioning

confidence: 89%

Evaluation of phosphorus mobility in soil using different extraction methods

Kulhánek¹,

Balík²,

Cerny³

et al. 2009

PLANT SOIL ENVIRON

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Soil samples (from Czech and German long-term field experiments) were used to estimate different soil phosphorus (P) fractions. More than 200 topsoil (0-30 cm) samples from different fertilizing treatments were taken. These were analyzed for P in soil solution (P CaCl 2 ) [0.01M CaCl 2 extract], exchangeable sorbed P (P ex ) [anion exchange (aE) membranes] and bioavailable P [Doppel-lactat and Mehlich 3 (P Dl and P M3 )]. other fractions analyzed were total inorganic (P in ), total (P M-tot ) and organic (P org ) P [fractionation after Marks], P sorbed on Fe and al (P Feal ) [fractionation after Schwertmann] and residual P (P ar ) [aqua regia extract]. Comparison of medians appeared to be better for evaluating extraction abilities. Phosphorus fractions were in the following order: (P ar = 100%); P CaCl 2 (0.2%) < P ex (9%) < P Dl (10%) < P M3 (16%) < P in (24%) < P org (37%) < P Feal (55%) < P M-tot (59%). low amounts of P in , P org and P M-tot did not verify the applicability of the Marks' fractionation for the set of studied soils. Close correlations at P ≤ 0.001 were found for all methods for estimating the fractions of bioavailable phosphates (P CaCl 2 , P ex , P Dl and P M3 ). Statistically significant relations were observed between P in with P ar , P M-tot and P Feal .

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Section: Methodsmentioning

confidence: 89%

Evaluation of phosphorus mobility in soil using different extraction methods

Kulhánek¹,

Balík²,

Cerny³

et al. 2009

PLANT SOIL ENVIRON

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“…Also, soluble organic C from BL may compete with orthophosphates for anion adsorption sites thus reducing the potential sorption capability. [15,39,40] The lower amounts of extractable P in the Corozal soil as compared to the San Anto´n soil for all treatments is probably due to an increase in the magnitude of sorption and precipitation reactions due to its oxidic and kaolinitic mineralogy. In the San Anto´n soil, extractable P increased with increasing amounts of P added as TSP after one week of incubation.…”

Section: Phosphorus Availability As Function Of Timementioning

confidence: 98%

Phosphorus Soil Tests for Environmental Assessment in Subtropical Soils

Sotomayor‐Ramírez

Martínez

Mylavarapu

et al. 2004

Communications in Soil Science and Plant Analysis

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Soil test phosphorus (P) is used to evaluate the nutritional status of a soil in relation to a crop's yield response. Recently, there is interest to calibrate agronomic soil tests to predict risk of P transport in runoff. An experiment was conducted to evaluate the relationships among three agronomic soil test P extraction methods (Olsen, Bray1, Mehlich3) and dissolved P in water (0.01 M CaCl 2 extractable P) in five representative soils of tropical and subtropical areas in Puerto Rico and Florida. The soils were of the series Astatula (Entisol), San Anto´n (Mollisol), Caguabo (Inceptisol), Corozal (Ultisol), and Bayamo´n (Oxisol). Soils were amended with three inorganic P levels as triple super phosphate, three organic P levels as broiler litter, and their combinations in an incomplete factorial design for a total of 11 treatments. Soils were sampled during 46 weeks and soil test P was measured. Exploratory statistics were used to evaluate relationships among the variables. Relationships using the Astatula soil were studied separately as inherently high soil test P values influenced regressions greatly. A near 1:1 relationship between soil test P extracted using Bray1 and Mehlich3, and Mehlich3 and Olsen extractants was obtained. In general, improved relationships were obtained using individual soils as soil pH and mineralogy influenced the amount of P extracted. Critical soil test concentrations to reach dissolved P concentrations of 1 mg P L À1 were (95% confidence intervals in parenthesis) 179 (174-185), 197 (190-207), and 252 (243-266) ppm for Olsen, Bray1, and Mehlich3 extractants, respectively for all soils combined excluding Astatula. The critical values obtained in combination with soil-landscape information can be used to establish guidelines for P management in agricultural soils.

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“…The ODS samples were prepared for the assessment of available P using the following methods: (i) available P was extracted using Mehlich-1 Pavan et al (1992); (ii) available P was extracted using the ion exchange resin method (P-IER): [Amberlite IRA-410 and Amberlite IRA-120], following Raij, Quaggio, and Silva (1986); and (iii) available P was Magdoff et al (1999).…”

Section: Claymentioning

confidence: 99%

“…On the other hand, one of the critiques of the IER method has been the low practicality of the method, complicating its large-scale use (MOREIRA;MALAVOLTA, 2001). Therefore, it is interesting to study other P extraction methods, for example, the modified Morgan (MM) solution, suggested by Magdoff et al (1999). That method has been used in the United States and has high extraction capacity for P linked to the organic fraction of the soil, which is significant in soils under NT (RHEINHEIMER;ANGHINONI, 2003).…”

Section: Introductionmentioning

confidence: 99%

Availability of phosphorus for maize in crop-livestock integration system

Galetto¹,

Fonseca²,

Harkatin³

et al. 2014

Rev. Ciênc. Agron.

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-The objectives of this study were to assess the concentrations of available phosphorus (P) extracted using the Mehlich-1 (M1), ion exchange resin (IER) and modified Morgan (MM) methods after 36 months of experimentation with the application of phosphates in a crop-livestock integration system (CLIS). Moreover, this study aimed to assess which extraction method provides the best correlation of P concentrations with the maize crop attributes. The treatments consisted of applying annual doses of P 2 O 5 on the soil surface of the total area during the sowing of winter forage crops in the form of triple superphosphate (TSP), rock phosphate (RP) or magnesium thermophosphate (MTP). After 36 months of experimentation, soil samples were collected from the 0-5, 5-10, 10-15 and 15-20 cm layers to assess the concentrations of available P. The dry matter yield (DMY), the grain yield (GY), the accumulation of phosphorus in the dry matter (P-DM) and the export of phosphorus (P-Ex) were quantified in maize. The IER method extracted greater amounts of available P, followed by the M1 and MM extractions. The treatments that included the application of TSP and either the M1 or IER extractions had similar efficacies when correlated with the DMY, GY, P-DM and P-Ex attributes of maize. The P extracted by the IER was most correlated with P-DM and P-Ex for the water-insoluble P sources (RP and MTP). The MM solution was ineffective at predicting the availability of P for maize grown in a soil with that had received varying doses and sources of P applications in a CLIS. RESUMO -Os objetivos deste trabalho foram determinar as concentrações de P disponível extraído pelos métodos de Mehlich-1 (M1), Resina trocadora de íons (RTI) e Morgan Modificado (MM), após 36 meses de experimentação com aplicação de fosfatos em um sistema de integração lavoura-pecuária (SILP). Ainda, verificar qual método de extração proporciona melhor correlação com atributos da cultura do milho. O delineamento empregado foi em esquema fatorial incompleto, com quatro repetições. Foram aplicadas doses de P 2 O 5 , na superfície do solo, por ocasião da semeadura da forrageira de inverno, nas formas de superfosfato triplo (SFT), fosfato natural reativo (FNR) e termofosfato magnesiano (TFM). Após 36 meses, procederam-se coletas de solos das camadas de 0-5; 5-10; 10-15; 15-20 cm, visando determinar as concentrações de P disponível. Na cultura do milho foram quantificados o rendimento de massa seca (RMS), o rendimento de grãos (RG), o acúmulo de fósforo na massa seca (P-MS) e a exportação de fósforo (P-Ex). A RTI extraiu maiores quantidades de P disponível, seguida do extrator de M1 e do MM. Nos tratamentos que receberam aplicação de SFT, os extratores de M1 e RTI obtiveram eficiência semelhante quando correlacionados com os atributos de RMS, RG, P-MS e P-Ex do milho. Para as fontes insolúveis em água (FNR e TFM), o P extraído pela RTI melhor se correlacionou com o P-MS e o P-Ex. A solução de MM foi ineficiente para prever a biodisponibilidade de P para o milho, cul...

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Comparison of Phosphorus Soil Test Extractants for Plant Availability and Environmental Assessment

Cited by 58 publications

References 25 publications

Evaluation of phosphorus mobility in soil using different extraction methods

Evaluation of phosphorus mobility in soil using different extraction methods

Phosphorus Soil Tests for Environmental Assessment in Subtropical Soils

Availability of phosphorus for maize in crop-livestock integration system

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