Dynamics of fractionated rhizosphere soil P and plant P uptake under maize/P-mobilizing legumes intercropping in strongly weathered soil of Tanzania

Sugihara, Soh; Kawashita, Tomomi; Shitindi, Mawazo J.; Massawe, Boniface H. J.; Tanaka, Haruo

doi:10.1080/00380768.2021.1911589

Cited by 4 publications

(8 citation statements)

References 64 publications

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“…Effect of the intercropping or rhizobium inoculation on soil-plant P dynamicsIntercropping of PP and MZ substantially improved the fertilised PUE (~67%) in this study. Concordantly,Sugihara et al (2021) also observed increased PUE owing to P accumulation in the intercropped rhizosphere of strongly weathered soils in Tanzania.Schwerdtner et al (2023) also found that the intercropping of MZ and lupin increased organic acid secretion and P concentrations in MZ compared to monocropping. Similarly, we found that intercropping in strongly weathered soil improved the P acquisition capacity of the intercropped plant, such as the total amount of organic acid secreted from the plant root (~66%), resulting in higher plant P uptake and fertilised PUE.…”

supporting

confidence: 60%

“…Sugihara et al (2021) also reported improved PUE with P fertilisation in maize–PP intercropping systems than monocropping in highly weathered Tanzanian cropland soil. The intercropping system demonstrated better plant–soil P dynamics in the rhizosphere with a larger amount of labile P (Resin‐P, NaHCO 3 ‐Pi and NaHCO 3 ‐Po) than that in the bulk soil (Sugihara et al, 2021). These studies provide evidence for the efficiency of intercropping as a practical system to improve plant P uptake and fertilised PUE by improving rhizosphere soil P dynamics.…”

Section: Introductionmentioning

confidence: 95%

“…Single superphosphate was used for P treatment. In addition to these treatments, we prepared two different types of pots to create monocropping and intercropping conditions, according to Li et al (2003), with modifications: the pots were completely separated (CS) with a plastic sheet to prevent root interactions, and the pots were not separated (NS) so that the two species could interact with each other (Sugihara et al, 2021). The total number of treatments was eight (2 rhizobium inoculations × 2 P fertilisations × 2 pot separations), with five replications of each.…”

Section: Experimental Designmentioning

confidence: 99%

“…Intercropping of maize (Zea mays L.) and faba bean (Vicia faba L.) under low-P sandy soil conditions has been shown to improve fertilised PUE compared to monocropping due to the larger P uptake of maize, which is mobilised by the organic acid exudation from faba bean roots in the shared rhizosphere (Li et al, 2007). Sugihara et al (2021) also reported improved PUE with P fertilisation in maize-PP intercropping systems than monocropping in highly weathered Tanzanian cropland soil. The intercropping system demonstrated better plant-soil P dynamics in the rhizosphere with a larger amount of labile P (Resin-P, NaHCO 3 -Pi and NaHCO 3 -Po) than that in the bulk soil (Sugihara et al, 2021).…”

Section: Introductionmentioning

confidence: 98%

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Effect of rhizobium inoculation on rhizosphere phosphorous dynamics and fertilised phosphorous use efficiency in a maize–pigeon pea intercropping system in weathered tropical soil

Yamamoto

Okazaki

Monica

et al. 2023

J of Sust Agri & Env

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IntroductionLow phosphorus (P) use efficiency (PUE) of fertiliser is a critical problem in sustainable crop production, especially in strongly weathered tropical soils with a high P‐fixation capacity. Both intercropping and rhizobium inoculation have shown to improve the P availability of rhizosphere soil, but the effect of a combined approach of using both intercropping and rhizobium inoculation is still unclear. In this study, we aimed to evaluate the effect of rhizobium inoculation on the soil–plant P dynamics and fertilised PUE under the intercropping system in strongly weathered tropical soil.Materials and MethodsWe conducted an 85‐day cultivation pot experiment with pigeon pea (PP) and maize using highly weathered tropical soil under eight treatments: monocropping (CS) or intercropping, with or without rhizobium (Bradyrhizobium elkanii USDA61) inoculation (−I, +I) and with or without P fertilisation (0P, 50P) (2 × 2 × 2 = 8 treatments). We evaluated the effects of intercropping and rhizobium inoculation on plant growth parameters, P dynamics of the rhizosphere and bulk soil using the Hedley P fractionation method, the amount of organic acid from plant roots as a plant P‐mobilising capacity, and fertilised PUE.ResultsTotal plant P uptake per pot was significantly increased by intercropping but not by combining intercropping and rhizobium inoculation, resulting in better fertilised PUE only in intercropping. The available inorganic P (Pi) and less labile Pi of the soil were higher in the rhizosphere than those in the bulk by intercropping under 50P and were similar in PP + I under 50 P. The amount of organic acid per pot under 50P increased with each treatment, that is, intercropping and rhizobium inoculation, but not with their combination.ConclusionThe intercropping system has a strong potential to improve PUE by stimulating the P‐mobilising capacity of intercropping plant roots, whereas rhizobium inoculation of the intercropping system did not improve PUE in this study.

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supporting

confidence: 60%

Section: Introductionmentioning

confidence: 95%

Section: Experimental Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

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Effect of rhizobium inoculation on rhizosphere phosphorous dynamics and fertilised phosphorous use efficiency in a maize–pigeon pea intercropping system in weathered tropical soil

Yamamoto

Okazaki

Monica

et al. 2023

J of Sust Agri & Env

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“…S. salsa (suaeda) is an annual euhalophyte with high aptitude in gathering Na + to the root zone, being considered an ideal species for saline soil remediation in several studies [ 21 , 24 ]. Z. mays L. (maize) is a salt-sensitive non-halophyte with a fibrous root system that produces an important influence with a rhizosphere capacity in nutrient activation in the intercropping [ 25 , 26 ]. We speculate that the negative effect on maize in the suaeda/maize is caused by the interspecific competition for nitrogen.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen Promotes the Salt-Gathering Capacity of Suaeda salsa and Alleviates Nutrient Competition in the Intercropping of Suaeda salsa/Zea mays L.

Wang

Mai

et al. 2022

IJMS

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Nitrogen accelerates salt accumulation in the root zone of an euhalophyte, which might be beneficial for inhibiting the salt damage and interspecific competition for nutrients of non-halophytes in intercropping. However, the variations in the effect of euhalophyte/non-halophyte intercropping with nitrogen supply are poorly understood. Here, we selected the euhalophyte Suaeda salsa (suaeda) and non-halophyte Zea mays L. (maize) as the research objects, setting up three cropping patterns in order to explore the influence of nitrogen application on the intercropping effect in the suaeda/maize intercropping. The results showed that the biomass of maize in the intercropping was significantly lower than that in the monoculture, while for suaeda, it was higher in the intercropping than that in the monoculture. The biomass of maize under NO3−-N treatment performed significantly higher than that under no nitrogen treatment. Moreover, under suitable NO3−-N treatment, more salt ions (Na+, K+) gathered around the roots of suaeda, which weakened the salt damage on maize growth. In the intercropping, the effect of NO3−-N on the maize growth was enhanced when compared with the non-significant effect of NH4+-N, but a positive effect of NH4+-N on suaeda growth was found. Therefore, the disadvantage of maize growth in the intercropping suaeda/maize might be caused by interspecific competition to a certain extent, providing an effective means for the improvement of saline–alkali land by phytoremediation.

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Rhizobium Inoculation Improved the Rhizosphere P Dynamics and P Uptake Capacity of Pigeon Pea Plants Grown in Strongly Weathered Soil Only under P Fertilized Conditions

et al. 2022

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The improvement of phosphorus (P) use efficiency (PUE) is a critical problem in crop production because of phosphorus’ scarcity. Especially in strongly weathered soil with a high P fixation capacity, a low PUE generally limits plant growth. Here, in a 70-day pigeon pea cultivation pot experiment using Ultisols, we evaluated the effects of Rhizobium inoculation (−I/+I) on the plant growth, rhizosphere, bulk soil P dynamics, and plant root P acquisition characteristics, with or without P fertilization (0P: no P application; 50SSP:50 kg P ha−1 with single superphosphate). The combination of Rhizobium inoculation with P fertilization (50SSP + I) increased the plant growth, P uptake, and organic acid content per pot by 63%, 41%, and 130%, respectively, but not without P fertilization (0P + I). The labile and moderately labile inorganic P (NaHCO3-Pi and NaOH-Pi) contents were higher (55% and 44%, respectively) in the rhizosphere soil than those in the bulk soil in the 50SSP + I treatment, indicating the efficient solubilization of the applied P under the 50SSP + I treatment. The fertilized PUE was higher in the 50SSP + I treatment (26%) than that in the 50SSP−I treatment (15%). Thus, these results suggest that Rhizobium inoculation with 50SSP should stimulate plant root P acquisition characteristics, leading to the solubilization of applied P in the rhizosphere and efficient plant P uptake. In conclusion, the 50SSP + I treatment effectively improved the PUE of pigeon peas in strongly weathered soil.

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Dynamics of fractionated rhizosphere soil P and plant P uptake under maize/P-mobilizing legumes intercropping in strongly weathered soil of Tanzania

Cited by 4 publications

References 64 publications

Effect of rhizobium inoculation on rhizosphere phosphorous dynamics and fertilised phosphorous use efficiency in a maize–pigeon pea intercropping system in weathered tropical soil

Effect of rhizobium inoculation on rhizosphere phosphorous dynamics and fertilised phosphorous use efficiency in a maize–pigeon pea intercropping system in weathered tropical soil

Nitrogen Promotes the Salt-Gathering Capacity of Suaeda salsa and Alleviates Nutrient Competition in the Intercropping of Suaeda salsa/Zea mays L.

Rhizobium Inoculation Improved the Rhizosphere P Dynamics and P Uptake Capacity of Pigeon Pea Plants Grown in Strongly Weathered Soil Only under P Fertilized Conditions

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