Transitioning from phosphate mining to agriculture: Responses to urea and slow release fertilizers for Sorghum bicolor

Ruthrof, Katinka X.; Steel, Emma J.; Misra, Sunil; McComb, J.; O’Hara, G.W.; Hardy, G.E.St.J.; Howieson, John

doi:10.1016/j.scitotenv.2017.12.104

Cited by 18 publications

(9 citation statements)

References 24 publications

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“…Given the results in increased biomass and reduced Cd concentrations that the CRFs showed in this study, which were similar to the immediately available K 2 SO 4 fertiliser, even though CRFs are more expensive, further research on CRFs is warranted. Addition of fertilisers that are highly targeted to specific crops and the prevailing ecological and meteorological conditions may optimise nutrient inputs, maximise yields, reduce waste, minimise runoff and thus form part of the agricultural approach to increasing food security for post-phosphate mining substrates on Christmas Island, but could also be of interest to other phosphate mined sites such as in Florida, and on the island of Nauru (Brown 2005;Ruthrof et al 2018b).…”

Section: Discussionmentioning

confidence: 99%

“…Abiotic challenges include substrates with limited nutritional value and, occasionally, elevated concentrations of heavy metals (Singh and Singh 2001;Tischew and Kirmer 2007;Ruthrof et al 2018a). In the post-phosphate mining agricultural activities on Christmas Island, Indian Ocean, Australia, for example, while the post-mining substrate is high in phosphorus (P), legume and cereal growth are limited by low levels of potassium (K) and nitrogen (N), respectively (Howieson et al 2017;Ruthrof et al 2018aRuthrof et al , 2018b. Another major abiotic challenge in post-phosphate mining substrates is cadmium (Cd), which occurs naturally in rock phosphate, and can impede food and fodder production as it interferes with the uptake, translocation and use of nutrients and water by crops (Das et al 1997;Shamsi et al 2010) and may result in food products with unacceptably high levels of Cd.…”

Section: Introductionmentioning

confidence: 99%

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Responses to controlled release potassium fertilisers in agriculture following phosphate mining

et al. 2021

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The transition from mining to agriculture is hampered by a range of abiotic challenges to crop growth, including nutritional issues and heavy metal stress. Building on our previous work showing that potassium (K) limits legume growth in post-phosphate mining substrates on tropical Christmas Island, Australia, we undertook two field trials. The first compared the efficacy of controlled release K fertilisers (CRFs: KCl 2-month release, K2SO4 3-month and K2SO4 9-month) with immediately available potassium sulfate (K2SO4) fertiliser, on the legume Lablab purpureus. The second trial tested responses of L. purpureus to different rates of K2SO4 9-month CRF, and a combination treatment (CRF and K2SO4). Both trials were undertaken to determine how CRFs compare with immediately available K2SO4 in terms of increasing biomass, reducing cadmium (Cd) concentrations, maximising plant K concentrations and maintaining K soil retention. The first trial revealed that K2SO4 3-month and 9-month CRFs were similar to the 160 kg/ha K2SO4 treatment in significantly increasing L. purpureus biomass. Plant Cd and other heavy metal concentrations were significantly lower as plant biomass increased with increasing K, including with CRFs. The second trial showed no difference between various rates of K2SO4 9-month CRF and immediately available 160 kg/ha K2SO4 to increase biomass, reduce Cd or increase K concentrations. We have shown that although post-phosphate mining substrates can limit legume growth, high biomass can be attained with some CRFs, or K2SO4 at 160 kg/ha. Optimising nutrient input in post-mining agriculture is critical for developing safe, sustainable crops.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Responses to controlled release potassium fertilisers in agriculture following phosphate mining

et al. 2021

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“…The productivity of a crop is related to the availability of nutrients in the soil during its development. To meet the needs of the plant, fertilizers must be applied to the soil to ensure all the macros and micronutrients essential to its growth process [93].…”

Section: Agriculturementioning

confidence: 99%

“…Fertilizer encapsulation has also been shown to be a promising technique for use in agriculture. Its advantage over conventional application is the slow release of the nutrient contained within the capsules as required by the plant, which helps in the efficiency of mineral absorption by the plant and prevents the material from leaching into the soil [93,102]. Encapsulation occurs with the formation of a film/membrane on the active agent -mineral salts or fertilizer.…”

Section: Agriculturementioning

confidence: 99%

Alternative uses for tannery wastes: a review of environmental, sustainability, and science

et al. 2020

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The manufacture of leather covers a wide productive chain and beyond contributes to the economic flow. The various stages of leather processing result in high volumes of solid waste. In Brazil, a daily generation of 375 tons of solid waste is estimated, and landfills are still the most used route to its destination. In this review, emphasis will be given to researches that have sought alternatives for the use of solid waste from the tannery industry. Among the main applications of solid tannery wastes, the following stand out production of adsorbent materials, biodiesel, biogas, biopolymers, applications in agriculture and other applications involving extraction/recovery of compounds of industrial/commercial interest, isolation of microorganisms and production of enzymes and applications in the animal diet. In each alternative of waste application, the technologies used, the opportunities, and the challenges faced are mentioned. We hope that this review can provide valuable information to promote the broad understanding of the possibilities that tannery solid wastes has for the development of biodegradable and agricultural products, wastewater treatment, extraction of compounds of industrial and commercial interest, among others.

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“…al., 2018), as well as the product of the merlinoite synthesis (K 5 Ca 2 (Si 23 A l9 ) O 64 x 24H 2 O) from coal and other products (Li, et. al., 2014, Ruthrof, et. al., 2018.…”

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confidence: 99%

The Influence of Unconventional Mineral Fertilizers Based on the Processing of K-Mg Ores on Yield and Quality of Seed Potato, as Well as Soil Fertility Parameters

Smetannikov¹,

Fomin²,

Tsema³

et al. 2020

AgricultForest

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on the quality indicators of potato tubers both directly in the year of fertilization and after the storage period. Cinder, in contrast to the standard KCl fertilizer, had a positive effect on the content of exchangeable potassium in the soil. Research with unconventional mineral fertilizers based on K-Mg ore processing wastes should be continued with an emphasis on the study of long-term action as a complex ameliorant.

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Transitioning from phosphate mining to agriculture: Responses to urea and slow release fertilizers for Sorghum bicolor

Cited by 18 publications

References 24 publications

Responses to controlled release potassium fertilisers in agriculture following phosphate mining

Responses to controlled release potassium fertilisers in agriculture following phosphate mining

Alternative uses for tannery wastes: a review of environmental, sustainability, and science

The Influence of Unconventional Mineral Fertilizers Based on the Processing of K-Mg Ores on Yield and Quality of Seed Potato, as Well as Soil Fertility Parameters

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