Effect of localised phosphorus application on root growth and soil nutrient dynamics in situ – comparison of maize (Zea mays) and faba bean (Vicia faba) at the seedling stage

Gao, Wei; Blaser, Sebastian R. G. A.; Schlüter, Steffen; Shen, Jianbo; Vetterlein, Doris

doi:10.1007/s11104-019-04138-2

Cited by 43 publications

(37 citation statements)

References 61 publications

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“…Our results did not support such findings in maize plants that were treated with humic acid where this amendment improved significantly P and Zn contents within both shoots and grains. Probably, P-fertilizers stimulated the growth of plant roots (Gao et al 2019) and consequently improved Zn uptake by plants (Nikbakht et al 2008).Our findings did not also contradict those of Jones et al (2007) who reported that application of humic acid did not affect significantly micronutrient uptake, as the authors used a low-grade commercial HA in their experimental study.…”

Section: -Seed Weightsupporting

confidence: 67%

Can humic acid alleviate the adverse effect of elevated phosphorus application on yield and nutritive contents of maize grown on a calcareous soil?

Aziz¹,

Abbas

Ewis

2020

EBSS

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G ROWING maize in calcareous soils requires adequate supply of phosphorus inputs, yet excessive P-applications may affect negatively micronutrients availability in soil, including Zn. Thus, the current study evaluates the ability of humic acid (HA) to counteract the negative effects of applied P on Zn-uptake by maize plants. To achieve this aim, a field experiment was conducted in a calcareous soil (CaCO 3 =268.91 g kg-1) following a split plot design to study the interactions between different P-inputs (100, 125 and 150% of the recommended dose, applied in main plots) and available-Zn in presence and absence of HA (applied in sub-plots at either 2 or 4 kg HA ha-1). Results revealed that increasing the level of P-application raised significantly P availability and consequently its uptake by maize plants; thus, enhanced significantly plant growth parameters and grain yield. In this concern, 125% of the recommended P-dose recorded the highest partial factor productivity values. Likewise, application of HA raised significantly available-P content and improved considerably plant growth and grain yield, especially with increasing the rate of its application. On the other hand, increasing the level of P-fertilizers decreased significantly Zn-availability and uptake by plants; however, in presence of HA, this effect was counteracted. Although, this amendment recorded no significant effect on soil-Zn availability; however, it raised significantly its content in shoots but not in grains. In conclusion, HA improved significantly the productivity of maize grown on a calcareous soil. This amendment not only improved the partial factor productivity of P-fertilizer, but also increased Zn-uptake by maize plants.

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Section: -Seed Weightsupporting

confidence: 67%

Can humic acid alleviate the adverse effect of elevated phosphorus application on yield and nutritive contents of maize grown on a calcareous soil?

Aziz¹,

Abbas

Ewis

2020

EBSS

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“…In the same mechanism, the P-dipping could have developed the P hotspot near the root zone even under highly P-fixing soils. Previous field experiments also detected soluble P hotspots as a result of localized P fertilizer application compared to uniform P incorporation 31 , 32 . Akahane et al reported that high amount of P was remained available up to harvest within a relatively small area of 2 cm (vertical) by 4 cm (horizontal) from the application spot as a result of localized P application in continuously flooded lowlands 32 .…”

Section: Discussionmentioning

confidence: 90%

P-dipping of rice seedlings increases applied P use efficiency in high P-fixing soils

Tsujimoto

Rakotoarisoa

et al. 2020

Sci Rep

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Applied phosphorus (P) use efficiency is generally low due to the low mobility of P in soil and its affinity to form insoluble complexes. Localized P application nearby the root zone is a potential approach to overcome this issue in crop production. However, the interaction with soil conditions is little understood, which results in less effective application of this approach. Using root-box experiments and changing P-retention capacity of soils, we revealed that applied P use efficiency of rice can be substantially improved by dipping seedlings in P-enriched slurry at transplanting (P-dipping) even in highly P-fixing soils. Spatial analysis of soluble P in soils indicated that P-dipping creates a P hotspot because the P-enriched slurry is transferred with seedling roots. The P hotspot could have induced vigorous surface root and facilitated further P uptake from the spot. In contrast, the effect of conventional P incorporation depended on P-retention capacity of soils; no increases in soluble P content in soils or plant P uptakes were observed when P-retention capacity was high. Our finding of significant interaction between localized P application and a specific soil property should help improving applied P use efficiency and achieving sustainable rice production against depleting P fertilizer resources.

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“…Vicia faba and Zea mays with their contrasting tap and fibrous root systems. Root architecture parameters were obtained from µCT images of Vicia faba and Zea mays plants that were grown in a lab experiment (Gao et al, 2019). The root systems shown on the µCT images were thereby manually reconstructed in a three-dimensional virtual reality system (Stingaciu et al, 2013) and saved as RSML files (Lobet et al, 2015).…”

Section: Methodsmentioning

confidence: 99%

“…In a third scenario we simulated rhizodeposition by the growing root system Vicia faba that was generated with CPlantBox to investigate the impact of a complex root architecture on the spatio-temporal distribution patterns of rhizodeposits. Root architecture parameters were obtained from µCT images of Vicia faba plants that were grown in a lab experiment (Gao et al, 2019).…”

Section: Scenario Setup and Model Parameterizationmentioning

confidence: 99%

Simulating rhizodeposition patterns around growing and exuding root systems

Landl¹,

Haupenthal²,

Leitner³

et al. 2021

Preprint

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In this study, we developed a novel model approach to compute the spatio-temporal distribution patterns of rhizodeposits around growing root systems in three dimensions. Root systems were generated using the root architecture model CPlantBox. The concentration of rhizodeposits at a given location in the soil domain was computed analytically. To simulate the spread of rhizodeposits in the soil, we considered rhizodeposit release from the roots, rhizodeposit diffusion into the soil, rhizodeposit sorption to soil particles, and rhizodeposit degradation by microorganisms. To demonstrate the capabilities of our new model approach, we performed simulations for the two example rhizodeposits mucilage and citrate and the two example root systems Vicia faba and Zea mays. The rhizodeposition model was parameterized using values from the literature. Our simulations showed that the rhizosphere soil volume with rhizodeposit concentrations above a defined threshold value (i.e., the rhizodeposit hotspot volume), exhibited a maximum at intermediate root growth rates. Root branching allowed the rhizospheres of individual roots to overlap, resulting in a greater volume of rhizodeposit hotspots. This was particularly important in the case of citrate, where overlap of rhizodeposition zones accounted for more than half of the total rhizodeposit hotspot volumes. The rhizodeposit hotspot volume around the tap root system Vicia faba was shown to be much larger than around the fibrous root system Zea mays. Coupling a root architecture model with a rhizodeposition model allowed us to get a better understanding of the influence of root architecture as well as rhizodeposit properties on the evolution of the spatio-temporal distribution patterns of rhizodeposits around growing root systems.

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Effect of localised phosphorus application on root growth and soil nutrient dynamics in situ – comparison of maize (Zea mays) and faba bean (Vicia faba) at the seedling stage

Cited by 43 publications

References 61 publications

Can humic acid alleviate the adverse effect of elevated phosphorus application on yield and nutritive contents of maize grown on a calcareous soil?

Can humic acid alleviate the adverse effect of elevated phosphorus application on yield and nutritive contents of maize grown on a calcareous soil?

P-dipping of rice seedlings increases applied P use efficiency in high P-fixing soils

Simulating rhizodeposition patterns around growing and exuding root systems

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