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The Joint Application of Phosphorus and Ammonium Enhances Soybean Root Growth and P Uptake

Author

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  • Ciro Antonio Rosolem

    (Department of Crop Science, School of Agricultural Sciences, São Paulo State University, 3780 Universitaria Av., Botucatu 18610-034, Brazil)

  • Thiago Barbosa Batista

    (Department of Crop Science, School of Agricultural Sciences, São Paulo State University, 3780 Universitaria Av., Botucatu 18610-034, Brazil)

  • Patrícia Pereira Dias

    (Department of Crop Science, School of Agricultural Sciences, São Paulo State University, 3780 Universitaria Av., Botucatu 18610-034, Brazil)

  • Laudelino Vieira da Motta Neto

    (Department of Crop Science, School of Agricultural Sciences, São Paulo State University, 3780 Universitaria Av., Botucatu 18610-034, Brazil)

  • Juliano Carlos Calonego

    (Department of Crop Science, School of Agricultural Sciences, São Paulo State University, 3780 Universitaria Av., Botucatu 18610-034, Brazil)

Abstract

It has been shown that the joint application of phosphorus (P) and ammonium (N-NH + 4 ) increases maize root proliferation and P acquisition by maize in alkaline soils, but this has not been shown in acidic soils for legumes. A greenhouse experiment was conducted to assess the effect of the joint application of P and NH 4 + on soybean root growth and P acquisition. Soybean was grown in glass-walled pots without P, with monoammonium phosphate (MAP) and triple super phosphate (TSP) applied on the soil surface or localized. The soil P increased irrespective of the P source and localization. The rhizosphere pH was decreased by MAP, while the soil bulk pH was not affected. The TSP increased the root length by 55% and MAP by 76% over the control, and the number of root tips increased by 21% with TSP, 58% with MAP applied on the soil surface, and 78% with MAP localized. The soybean dry matter, N and P uptake, and P use efficiency were increased by P fertilization, mainly with MAP localized. The joint application of P and ammonium decreases the soybean rhizosphere pH, which results in root proliferation early in the cycle, and eventually in higher P uptake and use efficiency.

Suggested Citation

  • Ciro Antonio Rosolem & Thiago Barbosa Batista & Patrícia Pereira Dias & Laudelino Vieira da Motta Neto & Juliano Carlos Calonego, 2022. "The Joint Application of Phosphorus and Ammonium Enhances Soybean Root Growth and P Uptake," Agriculture, MDPI, vol. 12(6), pages 1-9, June.
    • Handle: RePEc:gam:jagris:v:12:y:2022:i:6:p:880-:d:841940
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    References listed on IDEAS

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    1. Rico Gamuyao & Joong Hyoun Chin & Juan Pariasca-Tanaka & Paolo Pesaresi & Sheryl Catausan & Cheryl Dalid & Inez Slamet-Loedin & Evelyn Mae Tecson-Mendoza & Matthias Wissuwa & Sigrid Heuer, 2012. "The protein kinase Pstol1 from traditional rice confers tolerance of phosphorus deficiency," Nature, Nature, vol. 488(7412), pages 535-539, August.
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    Cited by:

    1. Yi Jin & Jin He & Yonghe Zhu & Kadambot H. M. Siddique, 2022. "Nodule Formation and Nitrogen Use Efficiency Are Important for Soybean to Adapt to Water and P Deficit Conditions," Agriculture, MDPI, vol. 12(9), pages 1-11, August.

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