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Effect of irrigation on sap flux density variability and water use estimate in cherry (Prunus avium) for timber production: Azimuthal profile, radial profile and sapwood estimation

Author

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  • Molina, A.J.
  • Aranda, X.
  • Carta, G.
  • Llorens, P.
  • Romero, R.
  • Savé, R.
  • Biel, C.

Abstract

Information on tree water use in plantations for high quality wood is scarce, thus studies are needed to properly estimate the irrigation demand of these plantations. Plant water use estimation with sap flow sensors has been used extensively. However, biases in tree sap flow estimate can arise from variations on radial and azimuthal profiles of sap flux density and also from the sapwood area considered for the up-scaling from sap flux density to sap flux. This work aimed to (1) study the spatial variations of sap flux density in cherry trees in a timber orientated plantation, (2) compare several methods to estimate sapwood depth in cherry trees and (3) to evaluate the effect of drip irrigation on these factors. The results showed that most of the studied trees had decreasing radial sap flux density profiles with depth as expected. However, the three irrigated trees of bigger sizes still showed high sap flux densities in their inner tissues, at contrast with the rest of the trees and especially with the non irrigated ones of similar size with values close to 20% of the sap flux density measured at 1cm depth from cambium. On the other hand, the different methods tested to estimate sapwood depth gave significantly different results and only the two methods of visual identification in wood cores based on color change and measurements of sap flux densities along the xylem radius may be considered suitable for scaling purposes. Moreover, azimuthal variation pattern was found to be random in all the studied trees, and the ranking between the aspects (north, south, east and west) was not affected by either drip irrigation or sun exposition, and thus measuring sap flux density in any particular aspect has been shown to be suitable to estimate the overall tree sap flux. We conclude that more studies are necessary to properly assess the radial profile of sap flux density, especially when considering the high sap flux density in the inner tissues of the three bigger irrigated trees as compared to the other trees, and also how this pattern seemed to indicate sapwood depths values very contrasted to the ones estimated from color change in wood cores.

Suggested Citation

  • Molina, A.J. & Aranda, X. & Carta, G. & Llorens, P. & Romero, R. & Savé, R. & Biel, C., 2016. "Effect of irrigation on sap flux density variability and water use estimate in cherry (Prunus avium) for timber production: Azimuthal profile, radial profile and sapwood estimation," Agricultural Water Management, Elsevier, vol. 164(P1), pages 118-126.
    • Handle: RePEc:eee:agiwat:v:164:y:2016:i:p1:p:118-126
    DOI: 10.1016/j.agwat.2015.08.019
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    Cited by:

    1. Blanco, Víctor & Martínez-Hernández, Ginés Benito & Artés-Hernández, Francisco & Blaya-Ros, Pedro José & Torres-Sánchez, Roque & Domingo, Rafael, 2019. "Water relations and quality changes throughout fruit development and shelf life of sweet cherry grown under regulated deficit irrigation," Agricultural Water Management, Elsevier, vol. 217(C), pages 243-254.
    2. Molina, A.J. & Aranda, X. & Llorens, P. & Galindo, A. & Biel, C., 2019. "Sap flow of a wild cherry tree plantation growing under Mediterranean conditions: Assessing the role of environmental conditions on canopy conductance and the effect of branch pruning on water product," Agricultural Water Management, Elsevier, vol. 218(C), pages 222-233.
    3. Song, Lining & Zhu, Jiaojun & Zheng, Xiao & Li, Xinjunyan & Wang, Kai & Zhang, Jinxin & Wang, Guochen & Sun, Haihong, 2023. "Water use dynamics of trees in a Pinus tabuliformis plantation in semiarid sandy regions, Northeast China," Agricultural Water Management, Elsevier, vol. 275(C).

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