The agronomic benefit of phosphate rock application with elemental sulfur depends on the reactivity and fertilizer placement

César, Fábio Ricardo Coutinho Fontes; Muraoka, Takashi; Silva, Rodrigo C. da; Souza-Filho, Luiz Francisco

doi:10.1080/01904167.2020.1793181

Cited by 2 publications

(4 citation statements)

References 32 publications

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“…It is known that sparingly-soluble PR cannot be utilized by most plants even under pH at 4.9−5.5. 36,37 Our findings of greater DOC and acid phosphatase activity highlight the importance of root exudates in PR-induced plant growth and As accumulation in P. vittata. 41 To optimize P utilization by crop plants, further studies are warranted to identify unique root exudations and elucidate the mechanisms governing their synthesis in P. vittata roots as well as their secretion to the rhizosphere.…”

Section: ■ Environmental Implicationsmentioning

confidence: 74%

“…To acquire greater P, P. vittata roots also secrete more acid phosphatase into the rhizosphere under As exposure, which helps to hydrolyze organic P into inorganic P for plant uptake. , Besides, compared to the As treatment, the DOC content is increased in the rhizosphere in the As+PR treatment (Figure D), thereby accelerating Ca and P solubilization from PR and promoting their accumulation in P. vittata . It is known that sparingly-soluble PR cannot be utilized by most plants even under pH at 4.9–5.5. , Our findings of greater DOC and acid phosphatase activity highlight the importance of root exudates in PR-induced plant growth and As accumulation in P. vittata . To optimize P utilization by crop plants, further studies are warranted to identify unique root exudations and elucidate the mechanisms governing their synthesis in P. vittata roots as well as their secretion to the rhizosphere.…”

Section: Environmental Implicationsmentioning

confidence: 79%

“…For most plants, PR is insufficient to support their growth, even under pH values at 4.9−5.5. 36,37 For example, nonhyperaccumulator P. ensiformis fails to acquire sufficient PR-P under P-free hydroponics, whereas As-hyperaccumulator P. vittata yields greater biomass probably due to its effective uptake of P and Ca from PR. 16 Likewise, in this study, P. vittata grew better under both As and As+PR treatments (Figure 1A).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Arsenic-Hyperaccumulator Pteris vittata Effectively Uses Sparingly-Soluble Phosphate Rock: Rhizosphere Solubilization, Nutrient Improvement, and Arsenic Accumulation

Deng,

Guan,

Cao

et al. 2024

Environ. Sci. Technol.

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Sparingly-soluble phosphate rock (PR), a raw material for P-fertilizer production, can be effectively utilized by the As-hyperaccumulator Pteris vittata but not most plants. In this study, we investigated the associated mechanisms by measuring dissolved organic carbon (DOC) and acid phosphatase in the rhizosphere, and nutrient uptake and gene expression related to the As metabolism in P. vittata. The plants were grown in a soil containing 200 mg kg −1 As and/or 1.5% PR for 30 days. Compared to the As treatment, the P. vittata biomass was increased by 33% to 4.6 g plant −1 in the As+PR treatment, corresponding to 27% decrease in its frond oxidative stress as measured by malondialdehyde. Due to PR-enhanced DOC production in the rhizosphere, the Ca, P, and As contents in P. vittata fronds were increased by 17% to 9.7 g kg −1 , 29% to 5.0 g kg −1 , and 57% to 1045 mg kg −1 in the As+PR treatment, thereby supporting its better growth. Besides, PR-induced rhizosphere pH increase from 5.0 to 6.9 promoted greater P uptake by P. vittata probably via upregulating low-affinity P transporters PvPTB1;1/1;2 by 3.7−4.1 folds. Consequently, 29% lower available-P induced the 3.3-fold upregulation of high-affinity P transporter PvPht1;3 in the As+PR treatment, which was probably responsible for the 58% decrease in available-As content in the rhizosphere. Consistent with the enhanced As translocation and sequestration, arsenite antiporters PvACR3/3;3 were upregulated by 1.8−4.4 folds in the As+PR than As treatment. In short, sparingly-soluble PR enhanced the Ca, P, and As availability in P. vittata rhizosphere and improved their uptake via upregulating genes related to As metabolism, suggesting its potential application for improving phytoremediation in As-contaminated soils.

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Section: ■ Environmental Implicationsmentioning

confidence: 74%

Section: Environmental Implicationsmentioning

confidence: 79%

Section: ■ Results and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Arsenic-Hyperaccumulator Pteris vittata Effectively Uses Sparingly-Soluble Phosphate Rock: Rhizosphere Solubilization, Nutrient Improvement, and Arsenic Accumulation

Deng,

Guan,

Cao

et al. 2024

Environ. Sci. Technol.

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“…However, there is still a need to better manage PR dissolution and subsequent availability of P. The direct use of PR is generally limited to a range of situations where the combination of soil properties and cropping systems offer optimal conditions that allow dissolution rates to match short-term plant P demand. Several management options have been proposed to increase PR dissolution such as 1) partial acidulation (Ahmad et al, 2019), 2) biologically mediated solubilization (Magallon-Servin et al, 2020) and 3) incorporation with various additives such as elemental sulphur (César et al, 2020), some industrial wastes (Ahmad et al, 2012) and agro-industrial wastes (Vassilev et al, 2006). However, increasing the number of industrial wastes used as additives in circular manner due to their low price, is an important research topic as there is a need for promising chemical and biotechnological routes that provide a costeffective solubilization of PR.…”

Section: Introductionmentioning

confidence: 99%

Does phosphogypsum addition affect phosphate rock dissolution in acid soils?

Bouray

Moir

Mejahed

et al. 2023

Front. Environ. Sci.

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The direct application of phosphate rock (PR) has been found suitable for acidic soils. Still, efforts are needed to improve its reactivity to match grassland P demand. This research aimed to investigate changes in the dissolution of two Moroccan sedimentary PRs (Ben Guerir and Khouribga) in response to four rates of phosphogypsum (PG)—a by-product of the phosphate fertilizer industry. We conducted a 60-day incubation study using two acid soils from New Zealand. The soils were treated with PRs at 100 mgP kg−1 of soil either alone or combined with PG, which was applied at 0, 1, 3 and 9 t ha−1 (approximately the equivalent of 0, 0.9, 2.7, and 8.1 g of PG kg−1 of soil, respectively). The dissolution rates were determined from the differences in residual calcium (Ca) extracted with 1 M HCl. Soil pH, Olsen P, exchangeable aluminium (Al) and Ca and Ca saturation were analyzed at the end of the experiment. Phosphate rocks and PG’s physicochemical properties were characterized. Phosphogypsum addition increased Olsen P by 34% and 59% at 9 t ha−1 compared to 0 t ha−1 in Molesworth and Lindis Peaks soils, respectively. However, PG did not affect the dissolution of PRs in the different of soil types. Khouribga PR was more reactive than Ben Guerir PR, especially in the Molesworth soil where soil pH and base saturation were lower and P retention was higher compared to Lindis Peaks soil. Particle size distribution was the key factor that contributed to the observed greater reactivity of the Khouribga PR. Both PRs showed dissolution rates >50%, suggesting their suitability for direct application on acid soils. Being an important source of sulphur and some P, PG if combined with PR, can promote and complement PR’s direct use as fertilizer on acid soils. Moreover, the development of new fertilizer products by combining these two materials should be encouraged.

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The agronomic benefit of phosphate rock application with elemental sulfur depends on the reactivity and fertilizer placement

Cited by 2 publications

References 32 publications

Arsenic-Hyperaccumulator Pteris vittata Effectively Uses Sparingly-Soluble Phosphate Rock: Rhizosphere Solubilization, Nutrient Improvement, and Arsenic Accumulation

Arsenic-Hyperaccumulator Pteris vittata Effectively Uses Sparingly-Soluble Phosphate Rock: Rhizosphere Solubilization, Nutrient Improvement, and Arsenic Accumulation

Does phosphogypsum addition affect phosphate rock dissolution in acid soils?

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