How do light and water influence Pinus pinaster Ait. germination and early seedling development?

  • Ruano I
  • Pando V
  • Bravo F
  • 2


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Germination and survival in the initial months represent a critical
period for forest species. Many factors have significant influences
and can produce a negative effect on regeneration. To prevent this,
these factors must be known and their influence must be evaluated.
The influence of light and of water availability has been studied
in the most important pine species in the Iberian Peninsula, the
Pinus pinaster. An experimental seed-sowing was conducted in the
Cuellar experimental site (central Spain), where four different harvest
intensities were applied in 2004. Four different watering regimes
were performed during two consecutives summers (2006 and 2007) and
seedling development was monitored during 18 months. Main findings
reveal that, regarding germination and survival in the initial months,
light was more important than water availability. Higher germination
and survival rates were obtained when the lowest level harvest was
applied. However, in terms of biomass and growth, water availability
was more influential than harvest intensity. Results improved when
there was greater water availability after a few months. The main
conclusion of this study is that light shows a higher impact that
summer rainfall with respect to germination and survival in the early
stages of Mediterranean Maritime Pine. (C) 2009 Elsevier B.V. All
rights reserved.

Author-supplied keywords

  • Drought; Germination; Light; Pinus pinaster; Survi

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  • Irene Ruano

  • Valentin Pando

  • Felipe Bravo

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