IDEAS home Printed from https://ideas.repec.org/a/eee/ecomod/v221y2010i23p2839-2849.html
   My bibliography  Save this article

Modeling soil and plant phosphorus within DSSAT

Author

Listed:
  • Dzotsi, K.A.
  • Jones, J.W.
  • Adiku, S.G.K.
  • Naab, J.B.
  • Singh, U.
  • Porter, C.H.
  • Gijsman, A.J.

Abstract

The crop models in the Decision Support System for Agrotechnology Transfer (DSSAT) have served worldwide as a research tool for improving predictions of relationships between soil and plant nitrogen (N) and crop yield. However, without a phosphorus (P) simulation option, the applicability of the DSSAT crop models in P-deficient environments is limited. In this study, a soil–plant P model integrated to DSSAT was described, and results showing the ability of the model to mimic wide differences in maize responses to P in Ghana are presented as preliminary attempts to testing the model on highly weathered soils. The model simulates P transformations between soil inorganic labile, active and stable pools and soil organic microbial and stable pools. Plant growth is limited by P between two concentration thresholds that are species-specific optimum and minimum concentrations of P defined at different stages of plant growth. Phosphorus stress factors are computed to reduce photosynthesis, dry matter accumulation and dry matter partitioning. Testing on two highly weathered soils from Ghana over a wide range of N and P fertilizer application rates indicated that the P model achieved good predictability skill at one site (Kpeve) with a final grain yield root mean squared error (RMSE) of 535kgha−1and a final biomass RMSE of 507kgha−1. At the other site (Wa), the RMSE was 474kgha−1 for final grain yield and 1675kgha−1 for final biomass. A local sensitivity analysis indicated that under P-limiting conditions and no P fertilizer application, crop biomass, grain yield, and P uptake could be increased by over 0.10% due to organic P mineralization resulting from a 1% increase in organic carbon. It was also shown that the modeling philosophy that makes P in a root-free zone unavailable to plants resulted in a better agreement of simulated crop biomass and grain yield with field measurements. Because the complex soil P chemistry makes the availability of P to plants extremely variable, testing under a wider range of agro-ecological conditions is needed to complement the initial evaluation presented here, and extend the use of the DSSAT-P model to other P-deficient environments.

Suggested Citation

  • Dzotsi, K.A. & Jones, J.W. & Adiku, S.G.K. & Naab, J.B. & Singh, U. & Porter, C.H. & Gijsman, A.J., 2010. "Modeling soil and plant phosphorus within DSSAT," Ecological Modelling, Elsevier, vol. 221(23), pages 2839-2849.
  • Handle: RePEc:eee:ecomod:v:221:y:2010:i:23:p:2839-2849
    DOI: 10.1016/j.ecolmodel.2010.08.023
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0304380010004187
    Download Restriction: Full text for ScienceDirect subscribers only

    File URL: https://libkey.io/10.1016/j.ecolmodel.2010.08.023?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Daroub, Samira H. & Gerakis, Argyrios & Ritchie, Joe T. & Friesen, Dennis K. & Ryan, John, 2003. "Development of a soil-plant phosphorus simulation model for calcareous and weathered tropical soils," Agricultural Systems, Elsevier, vol. 76(3), pages 1157-1181, June.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Muntwyler, Anna & Panagos, Panos & Morari, Francesco & Berti, Antonio & Jarosch, Klaus A. & Mayer, Jochen & Lugato, Emanuele, 2023. "Modelling phosphorus dynamics in four European long-term experiments," Agricultural Systems, Elsevier, vol. 206(C).
    2. Adiku, Samuel G.K. & MacCarthy, Dilys S. & Kumahor, Samuel K., 2021. "A conceptual modelling framework for simulating the impact of soil degradation on maize yield in data-sparse regions of the tropics," Ecological Modelling, Elsevier, vol. 448(C).
    3. Fangfang Ning & Peteh Mehdi Nkebiwe & Jens Hartung & Sebastian Munz & Shoubing Huang & Shunli Zhou & Simone Graeff-Hönninger, 2023. "Phosphate Fertilizer Type and Liming Affect the Growth and Phosphorus Uptake of Two Maize Cultivars," Agriculture, MDPI, vol. 13(9), pages 1-13, September.
    4. G. Máthé-Gáspár & N. Fodor, 2012. "Modeling the phosphorus balance of different soilsusing the 4M crop model," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 58(9), pages 391-398.

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. World Bank, 2011. "Improving Governance for Scaling up SLM in Mali," World Bank Publications - Reports 2751, The World Bank Group.
    2. van der Laan, M. & Annandale, J.G. & Bristow, K.L. & Stirzaker, R.J. & Preez, C.C. du & Thorburn, P.J., 2014. "Modelling nitrogen leaching: Are we getting the right answer for the right reason?," Agricultural Water Management, Elsevier, vol. 133(C), pages 74-80.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:ecomod:v:221:y:2010:i:23:p:2839-2849. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/ecological-modelling .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.