Quantificação de fósforo por Mehlich 1, Mehlich 3 e Resina Trocadora de Ânions em solos com diferentes teores de argila

Mumbach, Gilmar Luiz; Oliveira, D.A; Warmling, Maria Izabel; Gatiboni, Luciano Colpo

doi:10.1590/0034-737x201865060010

Cited by 24 publications

(28 citation statements)

References 21 publications

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“…The M3 extraction occurs at a buffered pH of 2.5 due to the presence of acetic acid (Mehlich, 1984;Bortolon et al, 2009), which results in less solubilization of P-Ca forms than M1 in which the pH of soil:solution suspension is around 1.2. Besides, the presence of NH 4 F in M3 solution extracts specifically P-Al forms (Mehlich, 1984) and the EDTA, may be responsible for extracting some organic forms of P (Gatiboni et al, 2005;Mumbach et al, 2018). The extraction with IER is based on the process of adsorption of P in soil solution by the anionic resin and, consequently, the desorption of the P adsorbed in soil particles that are in equilibrium with soil solution during the agitation with soil:water (1:10 v/v) for 16 h. This is why some authors state that IER acts similarly to plant roots (van Raij et al, 1986;Silva and van Raij, 1999).…”

Section: Introductionmentioning

confidence: 99%

Interpretation of soil phosphorus availability by Mehlich-3 in soils with contrasting phosphorus buffering capacity

Reis¹,

Álvarez²,

Durigan³

et al. 2020

Revista Brasileira De Ciência Do Solo

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Increasingly rational use of phosphate fertilizers by agriculture is important, especially in Brazil, due to its importance for global food security and its high dependence on phosphate fertilizers for crop production. Thus, correlation and calibration researches with soil available phosphorus (P) extractants to improve the recommendation and the use of P are extremely important. Our objectives were (i) to determine soil P recovery rates and critical levels by the extractants Mehlich-1 (M1), Mehlich-3 (M3), and Ion Exchange Resin (RTI); (ii) to adjust predictive models of P recovery rates and critical levels for each extractant, as a function of soil properties related to the soil P buffer capacity, and (iii) to adjust the an interpretation table of soil P availability by M3 taking into account soil P buffer capacity indices. A pot experiment under greenhouse condition was conducted, in which the treatments were generated by the combination of a factorial 12 × 6, being 12 soil samples collected at a layer of 0.00-0.20 m, and six doses of P. The experimental units were constituted by plastic pots with capacity for 2.0 dm³ of soil, in which four hybrid corn plants (Zea mays L.) were cultivated for 45 d. The experimental design was a randomized complete block with four replicates. After cultivation, soil samples were collected from each experimental unit, and the determination of soil available P was performed by the extractants. The remaining P and the clay content were the soil properties that best correlated with the P recovery rates and P critical levels in the soil by the M1 and M3. The IER did not show sensitivity to soil P buffer capacity. The M3 had a discontinuous loss of extraction capacity with increasing soil P buffer capacity. Therefore, it is recommended the use of M3 as P extractant in soils with different characteristics, but a measure of soil P buffer capacity such as remaining P or clay content have to be used.

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Section: Introductionmentioning

confidence: 99%

Interpretation of soil phosphorus availability by Mehlich-3 in soils with contrasting phosphorus buffering capacity

Reis¹,

Álvarez²,

Durigan³

et al. 2020

Revista Brasileira De Ciência Do Solo

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“…However, the content of P was lower with the higher clay content and with the lower P rates, conditions where the adsorption potential of P is maximized (Oliveira et al 2014;Barrow 2015). In tropical and subtropical soils, it is known that the largest extraction of P by M-3 compared with M-1 only occurs in soils with up to 40% clay (Bortolon and Gianello 2008;Mumbach et al 2018). In more clayey soils, the behavior is reversed (Bortolon and Gianello 2008;Mumbach et al 2018).…”

Section: Availability Of P: Effect Of the Clay Contentmentioning

confidence: 99%

“…1). The effects of particle size composition on the extraction capacity are acknowledged in the literature (Bortolon and Gianello 2008;Freitas et al 2013;Mumbach et al 2018). It is known that the M-1 extractor loses extraction ability in soils with high clay content (Bortolon et al 2011), largely due to the exhaustion of the constituent acids of the extracting solution (Bortolon et al 2011), taking this fact into account in manuals that recommend fertilization.…”

Section: Availability Of P: Effect Of the Clay Contentmentioning

confidence: 99%

“…In tropical and subtropical soils, it is known that the largest extraction of P by M-3 compared with M-1 only occurs in soils with up to 40% clay (Bortolon and Gianello 2008;Mumbach et al 2018). In more clayey soils, the behavior is reversed (Bortolon and Gianello 2008;Mumbach et al 2018).…”

Section: Availability Of P: Effect Of the Clay Contentmentioning

confidence: 99%

“…There are also P extractors that act by ion exchange, such as the anion exchange resin (AER), which might be performed with strips (AER-ST) or spheres (AER-SP), being methods recommended in other Brazilian states. However, few works have evaluated the influence of clay content on the extractive ability of these methods (Mumbach et al 2018).…”

Section: Introductionmentioning

confidence: 99%

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Phosphorus Extraction with Soil Test Methods Affected by Soil P Sorption Capacity

Mumbach

Gatiboni

Dall’Orsoletta

et al. 2020

J Soil Sci Plant Nutr

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The aim of this study was to evaluate the phosphorus (P) extraction ability of the methods Mehlich 1 (M-1), Mehlich 3 (M-3), anion exchange resin in strips (AER-ST), and anion exchange resin in spheres (AER-SP), as a function of clay content, P rates, and incubation time. Experimental units were built with 20%, 40%, 60%, and 80% of clay and five different phosphorus rates as follows: 0, 100, 200, 400, and 600 mg P kg −1 , with subsequent incubation for 0, 30, and 90 days. After that, the samples were subjected to the analysis of extractable P using the M-1, M-3, AER-ST, and AER-SP extractors. All P extraction methods evaluated were sensitive to clay content and to the amount of added P. The input of P increased the recovery of this nutrient by all extractors, but this was less effective when the clay content of the soil was increased. In general, the ability of phosphorus extraction from the soil followed the order: M-1 > AER-SP > M-3 > AER-ST. The longer contact time of P with the soil, lower is the extracted P content, regardless of the extraction method, this being more evident in clayey soils. All extraction methods tested are sensitive to clay content, incubation time, and to the P concentration applied.

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Mehlich 3 as a generic soil test extractant for environmental phosphorus risk assessment across Alabama soil regions

Bhatta

Prasad

Chakraborty

et al. 2021

Agrosystems Geosci & Env

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Individual states in the United States have adopted different soil test P (STP) methods for agronomic and environmental purposes. Working between soil regions and state borderlines can be complicated by using multiple STP methods. For example, Alabama uses Mehlich 1 (M1) for noncalcareous soils (Appalachian Plateau [AP], Coastal Plain [CP], Limestone Valley [LV], Piedmont Plateau [PP]) and Lancaster (La) for calcareous soils (Blackland Prairie [BP]). Mehlich 3 (M3) has been proposed as an efficient and possibly a generic extractant for a broader range of soils.The objective of this study was to evaluate whether M3 can be used as a common or generic extractant for environmental P loss risk assessment for both calcareous and noncalcareous soils. More than 769 soil samples were collected from 68 agricultural fields representing noncalcareous and calcareous soils, and their extraction efficien-

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Quantificação de fósforo por Mehlich 1, Mehlich 3 e Resina Trocadora de Ânions em solos com diferentes teores de argila

Cited by 24 publications

References 21 publications

Interpretation of soil phosphorus availability by Mehlich-3 in soils with contrasting phosphorus buffering capacity

Interpretation of soil phosphorus availability by Mehlich-3 in soils with contrasting phosphorus buffering capacity

Phosphorus Extraction with Soil Test Methods Affected by Soil P Sorption Capacity

Mehlich 3 as a generic soil test extractant for environmental phosphorus risk assessment across Alabama soil regions

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