Effects of Mg-Al Layered Double Hydroxide on Nitrate Leaching and Nitrogen Uptake by Maize in a Calcareous Soil

Halajnia, Akram; Oustan, Shahin; Najafi, Nosratollah; Khataee, Alireza; Lakzian, Amir

doi:10.1080/00103624.2016.1165825

Cited by 19 publications

(11 citation statements)

References 29 publications

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“…The complete absence of slow-release behavior with LDH-N can be attributed to (i) soil acidity that would have degraded the Zn-Al LDH structure, (ii) the surface area associated with a broadcast application of powder, and (iii) weak NO 3 − retention by anion exchange. Owing to the presence of structural hydroxyl groups, LDHs are inherently reactive toward H 3 O + ions and are solubilized in the presence of acidity that exceeds their alkalizing capacity [16,20,24,48]. In the present study, excess acidity would have existed when LDH-N was applied at a rate of 50 or 150 mg N kg −1 , but probably not with 300 mg N kg −1 unless there was substantial acidification during the uptake of basic cations by a dense stand of pearl millet.…”

Section: Growth Chamber Experimentsmentioning

confidence: 99%

“…When these materials are used as fertilizers, the rate of nutrient release is enhanced by soil acidity, which reduces their structural stability [24]. The liberated hydroxyl groups become a source of alkaline buffering that retards further loss of layer integrity, thereby retaining some of the original slow-release behavior that only disappears when the buffering capacity has been completely overcome by acidity [20].…”

Section: Introductionmentioning

confidence: 99%

“…The liberated hydroxyl groups become a source of alkaline buffering that retards further loss of layer integrity, thereby retaining some of the original slow-release behavior that only disappears when the buffering capacity has been completely overcome by acidity [20]. The detrimental impact of soil acidity on the fertilizer value of LDHs is exacerbated by the prevalent practice of applying these materials as powders [18,20,24], which greatly increases the surface area for exposure to acidity and precludes accurate applications under field conditions.…”

Section: Introductionmentioning

confidence: 99%

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Improving Nitrate Fertilization by Encapsulating Zn-Al Layered Double Hydroxides in Alginate Beads

et al. 2020

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Layered double hydroxides (LDH) are anionic clays that have potential as slow-release fertilizers; however, their formulation as powders makes them difficult to apply, and their slow-release properties are impaired due to instability under acidic conditions. In the work reported, Zn-Al LDH containing interlayered 15NO3− was synthesized for use as powder (LDH-N) or for encapsulation in alginate beads (LDH-AN), and then authenticated by X-ray diffraction, attenuated total reflectance-Fourier transform infrared spectroscopy, and elemental analyses. The two LDHs were compared to K15NO3 for evaluating their slow-release properties through (i) a kinetic study of NO3− release in water under dynamic conditions, and (ii) a growth chamber experiment designed to estimate fertilizer N uptake efficiency (FNUE) by growing pearl millet (Pennisetum glaucum L.) on an acidic Oxisol in the absence of N losses. Both LDH materials exhibited slow-release properties in the kinetic studies, and NO3− release was reduced for LDH-AN as compared to LDH-N. Because of these properties, FNUE measurements in the growth chamber experiment should have been lower with the LDHs than with K15NO3, but this was not the case for LDH-N, which was attributed to the structural instability of powdered LDH in the presence of soil acidity and to the exchange of NO3− by more competitive anions such as CO32−. A significant decrease in FNUE was observed for LDH-AN, demonstrating retention of slow-release behavior that most likely resulted from the presence of a physicochemical barrier having high cation-exchange and buffering capacities while limiting exposure to soil acidity and anion exchange. Alginate encapsulation expands the practical potential of LDH for slow-release NO3− fertilization.

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Section: Growth Chamber Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Improving Nitrate Fertilization by Encapsulating Zn-Al Layered Double Hydroxides in Alginate Beads

et al. 2020

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“…The effectiveness of this principle has been illustrated for rock phosphate as a SRF, which decreases P losses by leaching (Ozanne et al, 1961) and surface runoff (Shigaki et al, 2007). Torres‐Dorante et al (2009) proposed chloride‐exchanged LDH material as a buffer system to reduce nitrate leaching in soils, whereas Halajnia et al (2016) found less nutrient leaching from soil columns for a nitrate‐exchanged LDH fertilizer than for an ammonium nitrate fertilizer. However, the advantage of these relative novel SRF materials in terms of minimizing P runoff losses has never been confirmed.…”

mentioning

confidence: 99%

Limited Dissolved Phosphorus Runoff Losses from Layered Double Hydroxide and Struvite Fertilizers in a Rainfall Simulation Study

et al. 2018

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The enrichment of P in surface waters has been linked to P runoff from agricultural fields amended with fertilizers. Novel slow-release mineral fertilizers, such as struvite and P-exchanged layered double hydroxides (LDHs), have received increasing attention for P recycling from waste streams, and these fertilizers may potentially reduce the risk of runoff losses. Here, a rainfall simulation experiment was performed to evaluate P runoff associated with the application of recycled slow-release fertilizers relative to that of a soluble fertilizer. Monoammonium phosphate (MAP), struvite, and LDH granular fertilizers were broadcasted at equal total P doses on soil packed in trays (5% slope) and covered with perennial ryegrass ( L.). Four rainfall simulation events of 30 min were performed at 1, 5, 15, and 30 d after the fertilizer application. Runoff water from the trays was collected, filtered, and analyzed for dissolved P. For the MAP treatment, P runoff losses were high in the first two rain events and leveled off in later rain events. In total, 42% of the applied P in the MAP treatment was lost due to runoff. In the slow-release fertilizer treatments, P runoff losses were limited to 1.9 (struvite) and 2.4% (LDH) of the applied doses and were more similar over the different rain events. The use of these novel P fertilizer forms could be beneficial in areas with a high risk of surface water eutrophication and a history of intensive fertilization.

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“…In the agricultural field, LDHs have been used in the intercalation of pesticides, herbicides, plant-growth hormones, as well as the intercalation of nutrients such as nitrate, phosphates (PO 4 3 − , HPO 4 2 − , H 2 PO 4 − ), etc., to obtain matrices that have a sustained release of the intercalated anions (Tronto et al, 2004;Cardoso et al, 2006;Ghormade et al, 2011;da Silva et al, 2014;Benício et al, 2016;Everaert et al, 2016Everaert et al, , 2017Halajnia et al, 2016;Yu et al, 2017). Woo et al (2011) studied the synthesis, characterization and kinetics of release of phosphate ions intercalated in CaFe-LDH.…”

mentioning

confidence: 99%

Layered double hydroxides: matrices for storage and source of boron for plant growth

et al. 2018

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The increase of the absorption efficiency of boron (B) by plants is essential for increasing crop productivity. The intercalation of B in MgAl layered double hydroxides (LDHs) is an alternative to evaluating how these materials can provide B to plants. In this work, a MgAl LDH intercalated with borate ions (Mg2Al-B-LDH) was synthesized by the constant pH coprecipitation method, and the material produced was evaluated as a matrix for storage and as a source of B for plants. The Mg2Al-B-LDH was characterized by XRD, ATR-FTIR, TGA-DTA, specific surface area, pore size and volume, and SEM. A bioassay was performed to verify the supply of B to plants from the two sources in the forms of H3BO3 and of Mg2Al-B-LDH to sunflower plants grown in pots. The LDH basal spacing value of 12.0 Å is characteristic of intercalation of tetraborate octahydrate ions [B4O5(OH)42−]·8H2O between the layers. There was an increase in the dry matter (DM) and B content of the plants relative to those treatments where no B was added. The lack of statistical difference for plant yield between the two sources of B suggests a lack of stability of the Mg2Al-B-LDH structure under the acidic condition of the soil.

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Effects of Mg-Al Layered Double Hydroxide on Nitrate Leaching and Nitrogen Uptake by Maize in a Calcareous Soil

Cited by 19 publications

References 29 publications

Improving Nitrate Fertilization by Encapsulating Zn-Al Layered Double Hydroxides in Alginate Beads

Improving Nitrate Fertilization by Encapsulating Zn-Al Layered Double Hydroxides in Alginate Beads

Limited Dissolved Phosphorus Runoff Losses from Layered Double Hydroxide and Struvite Fertilizers in a Rainfall Simulation Study

Layered double hydroxides: matrices for storage and source of boron for plant growth

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