Plant and Soil

, Volume 344, Issue 1, pp 99–110

Using hydrogel and clay to improve the water status of seedlings for dryland restoration

Authors

    • CEAM - Departament of EcologyUniversity of Alicante
    • Forest Restoration GroupMediterranean Center for Environmental Studies (Foundation CEAM)
  • Alberto Vilagrosa
    • CEAM - Departament of EcologyUniversity of Alicante
    • Mediterranean Center for Environmental Studies (Foundation CEAM)
  • V. Ramón Vallejo
    • CEAM - Departament of EcologyUniversity of Alicante
    • Mediterranean Center for Environmental Studies (Foundation CEAM)
Regular Article

DOI: 10.1007/s11104-011-0730-1

Cite this article as:
Chirino, E., Vilagrosa, A. & Vallejo, V.R. Plant Soil (2011) 344: 99. doi:10.1007/s11104-011-0730-1

Abstract

In dryland ecosystems, post-transplant water stress produces high seedling mortality after the first summer following outplanting. Our aim was to assess the effects of clay and hydrogel, both on the water holding capacity of the growing media and on various morphological and physiological characteristics of Quercus suber seedlings in the nursery and, subsequently, during the first 2 years in the field. Quercus suber L. seedlings were grown in four types of growing media: CS (Control growing media, standard mixture of limed peat and coconut peat, 1:1 v/v ratio), SC-10 (CS mixed with sepiolite clay at 10% v/v) and HS (CS mixed with hydrogel Stockosorb® K-400 at two doses, 0.7 and 1.5% w/w). HS-1.5 showed the best results, increasing the water holding capacity of the root plug, improving seedling water status and increasing seedling survival in the field. SC-10 showed an intermediate effect on seedling response in the field. Mixing hydrogel with a peat-based growing medium to form root plugs is a suitable technique for cultivating species to be planted in areas with a strong water deficit. This technique reduces post-transplant water stress in seedlings during their first months in the field and contributes to improve forest-restoration methods in dryland ecosystems.

Keywords

Quercus suber Plant stock quality Substrate Water availability Carbon isotope composition

Abbreviations

CS

Control growing media

SC-10

CS growing media mixed with sepiolite clay at 10% v/v

HS-0.7

CS growing media mixed with hydrogel at 0.7 w/w

HS-1.5

CS growing media mixed with hydrogel at 1.5% w/w

H s

Shoot height

RCD

Root collar diameter

SI

Slenderness index

DW S

Shoot dry weight

DW R

Root dry weight

DW R /DW S

Root/shoot ratio

SDW

Seedling dry weight

DW R /SDW

Root dry weight/seedling dry weight ratio

Ψ pd

Predawn xylem water potential

VWC

Volumetric water content

δ 13 C

Carbon isotope composition

Δ leaf

Carbon isotope discrimination

PDB

Pee Dee Belemnite Standard

gs

Stomatal conductance

GLM

General Lineal Model

Copyright information

© Springer Science+Business Media B.V. 2011