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Relating plant and soil water content to encourage smart watering in chestnut trees

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Listed:
  • Mota, Margarida
  • Marques, Tiago
  • Pinto, Teresa
  • Raimundo, Fernando
  • Borges, António
  • Caço, João
  • Gomes-Laranjo, José

Abstract

Chestnut orchards are facing new limitations due to scarce of soil water during summer times, mainly attributed to the low precipitation amount typically occurred on such period. The present study aims to define a methodology to improve in a smart way the utilization of water on chestnut irrigation. Based on leaf gas exchanges parameters, there is done a transposition for the soil water content and matric potential, to allow an optimization of the irrigation scheduling in chestnut trees. Trial was installed in a loamy soil at the northeast of Portugal between 2013 and 2016 with micro-sprinkler and drip irrigation system. Stem water potential, photosynthetic rate, soil water content and soil water potential were monitored during the vegetative cycle (June–October). The stem water potential was dependent on air’s temperature and soil moisture. The higher photosynthetic rate (9–11 μmolCO2·m−2 s−1) was reached when midday stem water potential ranged between −1.2 to −0.5 MPa and the regression between stem water potential and soil water content on the top 10–40 cm of soil was of r2 = 0.38. According to these, it was admissible to trigger irrigation when the probe registers 16% and watering must keep soil’s moisture near 23%. The regression between stem and soil water potential was of r2 = 0.43 and irrigation scheduling may be triggered when ‘Watermark’ sensor at 30–60 cm soil depth is above −100 cbar to promote good tree water status although this last is air temperature dependent.

Suggested Citation

  • Mota, Margarida & Marques, Tiago & Pinto, Teresa & Raimundo, Fernando & Borges, António & Caço, João & Gomes-Laranjo, José, 2018. "Relating plant and soil water content to encourage smart watering in chestnut trees," Agricultural Water Management, Elsevier, vol. 203(C), pages 30-36.
  • Handle: RePEc:eee:agiwat:v:203:y:2018:i:c:p:30-36
    DOI: 10.1016/j.agwat.2018.02.002
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    References listed on IDEAS

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    1. Girona, J. & Mata, M. & Fereres, E. & Goldhamer, D. A. & Cohen, M., 2002. "Evapotranspiration and soil water dynamics of peach trees under water deficits," Agricultural Water Management, Elsevier, vol. 54(2), pages 107-122, March.
    2. Garnier, E. & Berger, A. & Rambal, S., 1986. "Water balance and pattern of soil water uptake in a peach orchard," Agricultural Water Management, Elsevier, vol. 11(2), pages 145-158, April.
    3. Clothier, Brent E. & Green, Steven R., 1994. "Rootzone processes and the efficient use of irrigation water," Agricultural Water Management, Elsevier, vol. 25(1), pages 1-12, February.
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    Cited by:

    1. Abel Rodrigues & Alexandre B. Gonçalves & Rita Lourenço Costa & Alberto Azevedo Gomes, 2021. "GIS-Based Assessment of the Chestnut Expansion Potential: A Case-Study on the Marvão Productive Area, Portugal," Agriculture, MDPI, vol. 11(12), pages 1-17, December.

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