New Forests

, Volume 43, Issue 5–6, pp 925–939 | Cite as

Deep planting with shelters improves performance of different stocktype sizes under arid Mediterranean conditions

  • Juan A. Oliet
  • Francisco Artero
  • Simón Cuadros
  • Jaime Puértolas
  • Lourdes Luna
  • Jose M. Grau
Article

Abstract

Increasing plant size has been considered a way to improve survival and growth of planted containerized stock under dry conditions. Additionally, deep planting provides advantages to seedlings in dry areas because roots are placed deeper into the soil where there is likely more water available. In this study, we tested the effect of Zizyphus lotus stock size (300, 400 and 1,000 cm3 container volume) and planting depth (0 cm and 15 cm below ground level, shallow and deep, respectively) with shelters in a factorial experiment in the arid coastal flats of Southeastern Spain. In the nursery, total biomass of Z. lotus produced in 1,000 cm3 container volume averaged 219 % of those grown in 300 and 400 cm3, although no significant differences were found in shoot-to-root ratio or nutrient status. Root growth potential (RGP) of plants produced in 1,000 cm3 container (209 mg of new roots dry mass) was significantly higher than those of the two other volumes (63 mg in average), but the ratio shoot mass:RGP did not vary significantly between container volumes. After outplanting, and during the first year, volumetric water content (12–20 cm deep from ground level) averaged 3.9 % higher around the deep- versus shallow- planted treatments. Predawn water potential (ψ pd) of seedlings measured in July of the first year differed significantly among planting depths, with lower values for shallow-planted (−3.3 MPa) than for deep-planted (−2.7 MPa) seedlings. However, predawn water potential did not differ among the three container sizes. Survival 40 months after planting was significantly higher for deep-planted seedlings (58.5 %) than for shallow ones (42.7 %), but no differences appeared for container size. PAR radiation at shoot height within the shelter was lower during winter for deep-planted seedlings than for shallow-planted seedlings, and relative differences among planting depths were reduced in summer. Based on survival results, we concluded that deep planting with seedlings of Z. lotus produced in 300 cm3 container is a very effective way to improve planting success under the arid conditions of our experiment.

Keywords

Container size Planting depth Zizyphus lotus Shoot-to-root ratio Tree shelters 

Notes

Acknowledgments

We thank to Agriculture Research and Training Centre La Mojonera (Junta de Andalucía, Spain) for the use of the facilities to produce the plants. We gratefully acknowledge the financial support of the University of Córdoba, Andalucía Research Programs and National Institute for Agriculture Research (INIA, Spain) to promote research groups activities. Additionally, this research was partially supported by MEC project Encinut (AGL2006-12609-CO2-01) and co-financed by FEDER funds. The comments of two anonymous reviewers substantially improved the manuscript.

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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • Juan A. Oliet
    • 1
  • Francisco Artero
    • 2
  • Simón Cuadros
    • 3
  • Jaime Puértolas
    • 4
  • Lourdes Luna
    • 3
  • Jose M. Grau
    • 2
  1. 1.Department of SilvopascicultureUniversidad Politécnica de MadridMadridSpain
  2. 2.Instituto de Investigación y Tecnología Agraria y Alimentaria, Centro de Investigación ForestalMadridSpain
  3. 3.Department of Forest EngineeringUniversidad de CórdobaCórdobaSpain
  4. 4.Lancaster Environment CentreLancaster UniversityLancasterUK

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