Magnesium availability from kieserite and calcined magnesite on five soils of different pH

Heming, S. D.; Hollis, J.F.

doi:10.1111/j.1475-2743.1995.tb00506.x

Cited by 9 publications

(5 citation statements)

References 4 publications

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“…Though MgSO 4 •7H 2 O enhanced the Mg availability of the soil instantly after treatment, the available Mg content show a steady as well as continual emancipation of magnesium from this source until 60 days after treatment. These interpretations are in accordance with the outcomes of other workers [54,55]. Conquering an explanation of a power function equation for exchangeable Mg 2+ release from soils was previously explained by some researchers [28,42,56].…”

Section: Depiction Of Magnesium Release By Kinetic Modelssupporting

confidence: 91%

Unravelling the Release Kinetics of Exchangeable Magnesium in Acid Soil of Nilgiris

et al. 2023

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Magnesium deficiency is a pervasive and recurrent factor that significantly restricts crop production, primarily attributable to the low levels of exchangeable magnesium (ex-Mg) present in acidic soil conditions. This deficiency exerts a pronounced negative influence on the sustainability and progress of agricultural development. Hence the current study aspired at modeling the kinetics of Exchangeable Magnesium release from 3 fertilizer sources i.e., Epsom salt (MgSO4·7H2O), Magnesite (MgCO3) and Dolomite [CaMg(CO3)2] in the acidic soil of the Nilgiris district in Tamil Nadu, India. Four mathematical models were verified—Power function, parabolic diffusion, Simple-Elovich, and first-order to explain cumulative Mg2+ release. Power function was noticed to be an outstanding empirical equation finely fitted to the experimental data. The intensity, as well as the modality of the release pattern, was predicted by the numerical parameters. The power function as well as Parabolic Diffusion portrayed the Mg2+ release kinetics best as verified by the maximum correlation coefficients (r2). The parabolic diffusion model also designated the data as suitable, signifying diffusion-controlled exchange. From the derived dissolution rates, it was conceivable to agree Epsom salt (MgSO4·7H2O) from which the release was faster than the other two magnesium sources. In conclusion, these outcomes provided an insight into the temporal dynamics of magnesium availability in acidic soil, highlighting the importance of understanding its release kinetics for sustainable agriculture development. The findings contribute to the broader knowledge of magnesium management strategies, aiding in the development of targeted interventions to alleviate magnesium deficiency and optimize crop productivity in acidic soil environments.

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Section: Depiction Of Magnesium Release By Kinetic Modelssupporting

confidence: 91%

Unravelling the Release Kinetics of Exchangeable Magnesium in Acid Soil of Nilgiris

et al. 2023

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“…In several studies, various Mg fertiliser sources were tested in different soils to examine Mg plant uptake and losses through leaching (Durrant and Draycott 1976;Heming and Hollis 1995;Härdter et al 2004;Hanly et al 2005). It is commonly accepted that there is almost no Mg leaching risk of slow-release Mg fertilisers (dolomite or fertilisers contains Mg in the form of Mg oxide).…”

Section: Magnesium Fertiliser Leaching Potentialmentioning

confidence: 99%

“…It is commonly accepted that there is almost no Mg leaching risk of slow-release Mg fertilisers (dolomite or fertilisers contains Mg in the form of Mg oxide). Efficiency of slow-released Mg fertilisers may be slightly higher, especially in acid soil conditions, and/or when applied in ground forms (Härdter 1992;Heming and Hollis 1995;Härdter et al 2004). During the critical vegetative periods (such as shooting or flowering in wheat), crop nutrient requirements are at their maximum.…”

Section: Magnesium Fertiliser Leaching Potentialmentioning

confidence: 99%

“…In this context, watersoluble Mg fertilisers (such as kieserite and SMS) typically release more plant-available Mg in a relatively short period and are therefore more effective to secure crop Mg demand in Mg-deficient soils. On the other hand, SMS may cause higher risk of Mg leaching under certain conditions, such as in sandy soils and after heavy rain showers (Durrant and Draycott 1976;Heming and Hollis 1995;Härdter et al 2004;Hanly et al 2005;Loganathan et al 2005). Härdter et al (2004) reported that maize grown in a pot experiments had 19.6% greater Mg uptake and 10.6% higher yield with kieserite (water-soluble) treatment than MgO (slow-release Mg source) in both sandy and loamy soils.…”

Section: Magnesium Fertiliser Leaching Potentialmentioning

confidence: 99%

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Role of magnesium fertilisers in agriculture: plant–soil continuum

et al. 2015

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Abstract. In this review, we summarise factors contributing to plant availability of magnesium (Mg) in soils, the role of Mg in plant physiological processes related to yield formation and abiotic stress tolerance, and soil and fertiliser parameters related to Mg leaching in fertilised soils. Mg is a common constituent in many minerals, comprising 2% of Earth's crust; however, most soil Mg (90-98%) is incorporated in the crystal lattice structure of minerals and thus not directly available for plant uptake. Plants absorb Mg from the soil solution, which is slowly replenished by soil reserves. Duration and intensity of weathering, soil moisture, soil pH, and root-microbial activity in soil are key factors that determine plant-available Mg release from soils. On the other hand, the amount of Mg released from soil minerals is generally small compared with the amounts needed to sustain high crop yield and quality. Thus, in many agro-ecosystems, application of Mg fertilisers is crucial. Magnesium is involved in many physiological and biochemical processes; it is an essential element for plant growth and development and plays a key role in plant defence mechanisms in abiotic stress situations. An early effect of Mg deficiency in plants is the disturbed partitioning of assimilates between roots and shoots because the supply of sink organs with photosynthetic products is impaired, and sugars accumulate in source leaves. Thus, optimal supply of Mg is required to improve crop tolerance to various stresses and to increase yield and quality parameters of harvested products. Unlike other cations, Mg is very mobile in soils because it is less bound to the soil charges. Therefore, Mg losses by leaching might occur in sandy soils with high water conductivity. Leaching of Mg in soils when applied with various water-soluble fertilisers may also vary depending on the fertiliser's chemical composition, granule size, and effect on soil pH and cation balance, as we discuss in detail.

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“…The commonly used method for determining the dissolution rate of Mg fertilizers involves measuring the increase in dissolved Mg in soils (Durrant and Drycott 1976;Heming and Hollis 1995). However, this method can lead to an underestimation of dissolved fertilizer Mg in field soils because it does not account for losses of some of the dissolved fertilizer Mg from the topsoil via plant uptake and leaching (Mitchell et al 2000).…”

Section: Introductionmentioning

confidence: 99%

An Improved Procedure for Determining Magnesium Fertilizer Dissolution in Field Soils

Loganathan

Mitchell

Hanly

et al. 2005

Communications in Soil Science and Plant Analysis

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The sequential extraction procedure currently used to measure magnesium (Mg) fertilizer dissolution in soils consists of removing dissolved Mg (step 1), and partially dissolved Mg (step 2), followed by an 18-h extraction with 2 M HCl at room temperature to determine undissolved Mg (step 3). This procedure is satisfactory for soluble and moderately soluble Mg fertilizers but is not an accurate procedure for slightly soluble fertilizers, such as serpentine. When step 3 is replaced by a digestion procedure using 2 M HCl for 4 h at 90 -958C (improved step 3), the total serpentine Mg recovery (dissolved and undissolved Mg) from soil samples, either immediately after serpentine was added to soil or after a 21-day incubation with moist soil, was about 100% compared to 40 -50% by the original procedure. The improved procedure also increased the recovery of serpentine Mg applied to field soils. Therefore, this study recommends that the third step of the sequential extraction procedure be replaced by a 4 h digestion using 2 M HCl (90 -958C).

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Magnesium availability from kieserite and calcined magnesite on five soils of different pH

Cited by 9 publications

References 4 publications

Unravelling the Release Kinetics of Exchangeable Magnesium in Acid Soil of Nilgiris

Unravelling the Release Kinetics of Exchangeable Magnesium in Acid Soil of Nilgiris

Role of magnesium fertilisers in agriculture: plant–soil continuum

An Improved Procedure for Determining Magnesium Fertilizer Dissolution in Field Soils

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