Microbial iron reduction compensates for phosphorus limitation in paddy soils

Wang, Chaoqun; Thielemann, Lukas; Dippold, Michaela A.; Guggenberger, Georg; Kuzyakov, Yakov; Banfield, Callum C.; Ge, Tida; Guenther, Stephanie; Bork, Patrick; Horn, Marcus A.; Dorodnikov, Maxim

doi:10.1016/j.scitotenv.2022.155810

Cited by 15 publications

(9 citation statements)

References 41 publications

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“…This result implied that Feo might play an important role in regulating the transformation of P in paddy soils. Poorly crystalline Fe hydroxides not only have a higher affinity for multivalent oxyanion adsorption due to their large surface area (Liptzin & Silver, 2009; Parfitt et al., 1975), but also are more prone to be preferentially dissolved under reducing conditions than the crystalline Fe hydroxides (Ginn et al., 2017; Roden, 2004), and thus may play a more efficient role in the retention and mobilization of P in paddy soils (Wang et al., 2022; Zhao et al., 2018). Furthermore, the increase in Fe(II), H 2 O‐Pi, and NaHCO 3 ‐Pi and the decrease in NaOH‐Pi during the anaerobic incubations indicated that the reduction of Fe(III) hydroxides released their adsorbed or occluded phosphate.…”

Section: Discussionmentioning

confidence: 99%

“…Indeed, high P availability induced by organic fertilization regimes may in turn increase the risk of environmental pollution in certain cases (Ando et al, 2022;Hao et al, 2008;Liu et al, 2020;Wang et al, 2012). Furthermore, microbial Fe reduction can, to some extent compensate for P limitation in paddy soils (Wang et al, 2022). Wang et al (2018) further noted that a reduction in P fertilizer in rice-wheat rotation paddy soils promoted the microbial P utilization efficiency but did not alter the bacterial community composition.…”

Section: Effects Of the Transformation Of Fe Hydroxides On The Availa...mentioning

confidence: 99%

“…Seasonal alternation of drying and wetting conditions may cause the redox cycles of iron (Fe) hydroxides, which are expected to promote the formation of poorly crystalline Fe hydroxides (Ginn et al., 2017; Huang et al., 2022). Meanwhile, Fe hydroxides are regarded as the predominant geochemical sinks of phosphate, and the transformation of Fe hydroxides substantially influences the biogeochemical cycle of phosphorus (P) in acidic soils (Ando et al., 2022; Chacón et al., 2006; Wang et al., 2022). Indeed, P is typically associated with Fe oxides in paddy soils (Khan et al., 2019; Kögel–Knabner et al., 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Under anaerobic conditions, microorganisms preferentially use Fe hydroxides as terminal electron acceptors for their metabolism, resulting in the reduction of Fe(III) minerals (Liptzin & Silver, 2009; Lovley et al., 1996). The reductive dissolution of Fe hydroxides during the flooding period causes the release of nanoparticle P, which is regarded as the main source of available P in the rice–wheat cropping system (Gu et al., 2019; Henderson et al., 2012; Wang et al., 2022). Generally, released P in the soil increased together with the reduced Fe(II) during the inundation period of paddy soils (Chacón et al., 2006; Maranguit et al., 2017).…”

Section: Introductionmentioning

confidence: 99%

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Nine‐year organic fertilization enhances poorly crystalline iron hydroxide formation and phosphorus availability in a temperate rice–wheat cropping system

Qin

Han

Jia

et al. 2023

Soil Science Soc of Amer J

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Phosphorus (P) is typically associated with iron (Fe) hydroxides in paddy soils. Our study investigated the impact of different fertilization treatments on the availability of P regulated by Fe redox transformation in a rice (Oryza sativa L.)–wheat (Triticum aestivum L.) cropping system in the mid‐low reaches of the Yangtze River. Five fertilization treatments were examined: control (CK), chemical fertilizer (CF), 35% CF (P) plus pig manure compost (CFM), 100% CF (P) plus straw (CFS), and 35% CF (P) plus pig manure compost and straw (CFMS). Nine‐year rice–wheat rotations increased the oxalate‐extractable poorly crystalline Fe hydroxides (i.e., Feo) by 33%–87% compared with the initial soil, while fertilization further accelerated this process. Compost application increased the proportion of labile P by 75%–108% and decreased the proportion of non‐labile P by 14%–22% compared with the single chemical fertilization treatment. Furthermore, organic fertilization increased the mass proportions of macroaggregates and macroaggregate‐associated labile P. The Feo was positively correlated with the content of labile P but negatively correlated with the proportion of non‐labile P. Moreover, the reductive dissolution of Fe hydroxides was accompanied by the transformation of P from NaOH‐extractable to NaHCO3‐ and H2O‐extractable phases. These results indicate that seasonal alternation of drying and wetting can progressively drive the redox transformation of Fe hydroxides and promote the formation of Feo, thereby affecting the availability of P. Therefore, we suggested that P fertilizer should be reduced in the rice season due to the reduction of Fe hydroxides, particularly in the compost‐amended soils in the temperate rice–wheat cropping system.

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Section: Discussionmentioning

confidence: 99%

Section: Effects Of the Transformation Of Fe Hydroxides On The Availa...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nine‐year organic fertilization enhances poorly crystalline iron hydroxide formation and phosphorus availability in a temperate rice–wheat cropping system

Qin

Han

Jia

et al. 2023

Soil Science Soc of Amer J

View full text Add to dashboard Cite

show abstract

“…They were then dried at 70° to constant weight, and measured for dry weight and water content. Afterwards, they were milled and 0.5 g of the milled plant samples was digested by Kjeldahl decoction (10 ml 95.5%H 2 SO 4 and 3%H 2 O 2 ), and the digestion solution was used to determine the TN and TP of plants ( Lv et al, 2004 ; Wang et al, 2022 ) by a SmartChem200 analyzer.…”

Section: Methodsmentioning

confidence: 99%

Different factors drive the assembly of pine and Panax notoginseng-associated microbiomes in Panax notoginseng-pine agroforestry systems

Jia

Wang

et al. 2022

Front. Microbiol.

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Land-use conversion affects the composition and assembly of plant-associated microbiomes, which in turn affects plant growth, development, and ecosystem functioning. However, agroforestry systems, as sustainable land types, have received little attention regarding the dynamics of different plant-associated microbes. In this study, we used high-throughput sequencing technology to analyze the assembly mechanisms and the driving factors of pine- and Panax notoginseng (P.n.)-associated microbiomes during the conversion of different pine forests (Pinus kesiya var. langbianensis and Pinus armandii) into P.n.-pine agroforestry systems. The results showed that the conversion of pure pine forest into P.n.-pine agroforestry systems significantly altered the diversity of pine-associated fungi rather than the community structure, and the community structure of P.n.-associated fungi rather than the diversity. Additionally, plant-associated fungi were more responsive to land-use change than bacteria. Main effect analysis revealed that compartment rather than genotype was the driving factor of pine- and P.n.-associated microbiomes, but P.n. cultivation also significantly affected the assembly of pine-associated microbiomes. In addition, there was a transfer of P.n. endophytes to pine trees in agroforestry systems and the beneficial microbiomes (Massilia, Marmoricola, Herbaspirillum, etc.) were enlarged in pine roots. Therefore, the diversity of the assembly mechanisms of P.n.- and pine-associated microbiomes played an important role in the P.n.--pine agroforestry systems and were the basis for the sustainable development of the P.n.--pine agroforestry systems.

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Assessing phosphorus availability in paddy soils: the importance of integrating soil tests and plant responses

et al. 2023

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Phosphorus (P) cycling in paddy soil is closely related to iron (Fe) redox wheel; its availability to rice has thus generally been ascribed to Fe minerals reductive dissolution. However, the literature aimed to identify the best method for predicting rice available P does not uniformly point to Fe reductants. Rice plants can indeed solubilize and absorb P through many strategies as a function of P supply, modifying the chemical environment. Therefore, this study aims to estimate P availability in paddy soils coupling the redox mechanisms driving P cycling with concurrent plant responses. Soil available P was estimated in three groups of paddy soils with low, medium, or high P content assessing easily desorbable pools (0.01 M calcium chloride, Olsen, Mehlich-III, anion exchanging resins) and Fe-bound P pools (EDTA, citrate-ascorbate, and oxalate). Rice P uptake and responses to P availability were assessed by a mesocosm cultivation trial. Although P released in porewater positively correlated with dissolved Fe(II), it did not with plant P uptake, and readily desorbable P pools were better availability predictors than Fe-bound pools, mainly because of the asynchrony observed between Fe reduction and plant P demand. Moreover, in low P soils, plants showed higher Fe(II) oxidation, enhanced root growth, and up-regulation of P root transporter encoding genes, plant responses being related with changes in P pools. These results indicate the generally assumed direct link between Fe reduction and rice P nutrition in paddy soils as an oversimplification, with rice P nutrition appearing as the result of a complex trade-off between soil redox dynamics, P content, and plant responses.

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Microbial iron reduction compensates for phosphorus limitation in paddy soils

Cited by 15 publications

References 41 publications

Nine‐year organic fertilization enhances poorly crystalline iron hydroxide formation and phosphorus availability in a temperate rice–wheat cropping system

Nine‐year organic fertilization enhances poorly crystalline iron hydroxide formation and phosphorus availability in a temperate rice–wheat cropping system

Different factors drive the assembly of pine and Panax notoginseng-associated microbiomes in Panax notoginseng-pine agroforestry systems

Assessing phosphorus availability in paddy soils: the importance of integrating soil tests and plant responses

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