Soil and Fertilizer Phosphorus and Crop Responses in the Dryland Mediterranean Zone

Matar, A.; Torrent, J.; Ryan, John

doi:10.1007/978-1-4612-2844-8_3

Cited by 158 publications

(94 citation statements)

References 115 publications

(120 reference statements)

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“…P is the least mobile and available element for plants [150] due to the great capacity of the P ions to react with the components in the soil, which determines its low solubility. In Mediterranean soils, the mineralogy and the type of reactions that occur further reduce P bioavailability [15]. The presence of the different phosphate ions in solution is determined by the pH.…”

Section: Effect Of P On Fe Nutrition and Vice Versamentioning

confidence: 99%

“…The presence of the different phosphate ions in solution is determined by the pH. The oxides of Fe and Al have a prominent role in the adsorption of P ions in soils of wide pH range [15,151], although the greatest absorption occurs when the pH decreases because this causes an increase in the positive charges of Fe and Al oxides [152]. The maximum capacity of adsorption of the different oxides are around 2.5 µmol P m −2 for non-crystalline oxides [153], which together with the high specific surface area (100-400 m 2 g −1 ) and reactivity makes them the main sorbents of P [154,155].…”

Section: Effect Of P On Fe Nutrition and Vice Versamentioning

confidence: 99%

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Similarities and Differences in the Acquisition of Fe and P by Dicot Plants

et al. 2018

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This review deals with two essential plant mineral nutrients, iron (Fe) and phosphorus (P); the acquisition of both has important environmental and economic implications. Both elements are abundant in soils but are scarcely available to plants. To prevent deficiency, dicot plants develop physiological and morphological responses in their roots to specifically acquire Fe or P. Hormones and signalling substances, like ethylene, auxin and nitric oxide (NO), are involved in the activation of nutrient-deficiency responses. The existence of common inducers suggests that they must act in conjunction with nutrient-specific signals in order to develop nutrient-specific deficiency responses. There is evidence suggesting that P-or Fe-related phloem signals could interact with ethylene and NO to confer specificity to the responses to Fe-or P-deficiency, avoiding their induction when ethylene and NO increase due to other nutrient deficiency or stress. The mechanisms responsible for such interaction are not clearly determined, and thus, the regulatory networks that allow or prevent cross talk between P and Fe deficiency responses remain obscure. Here, fragmented information is drawn together to provide a clearer overview of the mechanisms and molecular players involved in the regulation of the responses to Fe or P deficiency and their interactions.

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Section: Effect Of P On Fe Nutrition and Vice Versamentioning

confidence: 99%

Section: Effect Of P On Fe Nutrition and Vice Versamentioning

confidence: 99%

Similarities and Differences in the Acquisition of Fe and P by Dicot Plants

et al. 2018

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“…P forms in the fertilisers that are soluble in water are in principle high available to plants. Nevertheless, the soluble P in soil solution could undergo rapid immobilisation by sorption onto soil mineral surfaces (oxi-hydroxides of Fe and Al, clay minerals and calcite), or by incorporation into soil metal-organic matter complexes (Gerke and Hermann, 1992;Matar et al, 1992;Frossard et al, 1995;Torrent, 1997;Borggaard et al, 2004). So, the concentration of orthophosphate-P in the soil solution is basically controlled by adsorption/ desorption and precipitation/dissolution processes and also by the immobilisation and mineralisation of organic P forms.…”

Section: Phosphorus Forms and P Phytoavailability In Fertilisersmentioning

confidence: 99%

Sustainability of phosphorus fertilisation: sources and forms of phosphate

Horta¹

2015

Rev. Ciênc. Agr.

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A B S T R A C TPhosphorus (P), which originates from a non-renewable natural resource, is essential for crop productivity, food security and human health. Despite being a finite resource its use has been increasing consistently over the last few decades. The major use of the phosphate rock is the manufacture of P fertiliser, agriculture also being the main source for nonpoint source P pollution, which causes the eutrophication of water bodies. Thus, there is great need for a sustainable use of P with special attention to agricultural use, namely P fertilisation. This paper explores P sources and forms that could be phytoavailable and hence used as fertilisers. Current trends in phosphorus fertilisation are also discussed with a focus on approaches to net decrease in phosphate rock exploitation and closure of phosphorous cycle use.Keywords: eutrophication, fertilisers, phosphate rock, soil test phosphorus, struvite R E S U M OO fósforo (P) provém de um recurso natural não renovável e é indispensável para a produtividade agrícola, segurança alimentar e saúde humana. Apesar de ser um recurso finito o seu consumo tem vindo a crescer nas últimas décadas. O principal uso da rocha fosfatada é a produção de adubos fosfatados sendo também a atividade agrícola, a principal fonte de P de origem difusa que causa a eutrofização dos cursos de água. Estes factos enfatizam a necessidade do uso sustentá-vel do P com especial atenção no seu uso agrícola, em particular na fertilização fosfatada. Este artigo aborda as origens e as formas de P que podem ser fitodisponíveis e, deste modo usadas como fertilizantes. São também apresentadas as atuais tendências para uma fertilização fosfatada sustentável, com referência a algumas práticas e tecnologias para alcançar não só uma real diminuição na exploração das rochas fosfatadas, com também para fechar o ciclo de utilização do fósforo.Palavras-chave: eutrofização, fertilizantes, métodos de quantificação do fósforo, rocha fosfatada, struvite History and evolution of phosphorus fertilisationPhosphorus (P) is an essential nutrient for living beings making up about 0.2% of a plant's dry weight. P enters in the food chain taken up by plant roots from soil solution. P is a component of key molecules such as nucleic acids, phospholipids, and ATP. Therefore is a component of many cell constituents and plays a major role in several key processes, including photosynthesis, respiration, and energy storage and transfer, cell division, and cell enlargement (Marschner, 1995;Schachtman et al., 1998). In addition to other functions animals also require P for bones and teeth and derive their phosphorus needs from plant products and feed supplements. Thus, an adequate soil P level is essential not only for crop production but also for food security and human health.

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“…A great disparity in Pi-distribution between plant cells (mM) and soil solution (µM; well below the Km for plant uptake) affecting 5.7 billion ha (> 30% of world's arable land) is one of the major reasons for poverty and malnutrition in tropics and sub-tropics (Matar et al, 1992;Hinsinger, 2001;Vance et al, 2003). Hence, traditional approach of heavy fertilization for high crop yield is leading to a P-store/P-bank in soils.…”

Section: Introductionmentioning

confidence: 99%

Microcosm Investigation on Differential Potential of Free Floating Azolla Macrophytes for Phytoremediation of P-controlled Water Eutrophication

Akhtar

Oki²,

Nakashima³

et al. 2015

IJAB

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Eutrophication is caused by an over enrichment of aquatic ecosystems with nutrients, principally with chronic release of phosphorus (P) from point and non-point sources, leading to nuisance algal blooms, anoxic events, impaired water quality and stubborn environmental issues. Aquatic macrophytes display an efficient phytosequestration of inorganics in plant parts due to their non-degradable nature. Serial microcosm experiments were conducted to estimate differential phytoremdiation ability of A. japonica, A. pinnata, and A. hybrid to remove P from different P-eutrophicated solutions under different incubation periods. Azolla plants showed substantial P-removal efficiency from P-eutrophicated solutions, and removed P-amounts were significantly correlated with P-accumulated in plant biomass. About 1-fold decrease in solution pH might be ascribed to H + -efflux. Plants without P-hunger showed lower P-removal rates compared to P-hunger plants. A. japonica displayed highest Premoval efficiency in different experiments. From these kinetic experiments, it is plausible to conclude that phytoaccumulation was the possible mechanism for P-removal, and due to fast growth, high tolerance and accumulation ability, free floating Azolla might be the best candidate among macrophytes to combat P-driven eutrophication. Results obtained will not only provide information to environmental managers to mitigate P-eutrophication but will also provide data base to scientists for their future ventures.

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Soil and Fertilizer Phosphorus and Crop Responses in the Dryland Mediterranean Zone

Cited by 158 publications

References 115 publications

Similarities and Differences in the Acquisition of Fe and P by Dicot Plants

Similarities and Differences in the Acquisition of Fe and P by Dicot Plants

Sustainability of phosphorus fertilisation: sources and forms of phosphate

Microcosm Investigation on Differential Potential of Free Floating Azolla Macrophytes for Phytoremediation of P-controlled Water Eutrophication

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