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GESTION FORESTAL SOSTENIBLEInstituto de InvestigaciónUniversidad de Valladolid-INIA
SEMINAR Trends in Silvicultural Research
Influence of light and summer rainfall in germination and early
development of Pinus pinaster Ait.
IRENE RUANO BENITOMartes 24 de noviembre de 2009
INTRODUCTION AND OBJETIVES
Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait.
Why?
INTRODUCTION AND OBJETIVES
Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait.
Key factors of Maritime Pine
TEMPERATURE WATER DISPONIBILITY
LIGHT SIMULATING RAINFALL
MATERIALS AND METHODS
Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait.
MATERIALS AND METHODS
Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait.
Three harvest intensities
0% 25% 50% 100%P10 P2 P6 P1
P4 P7 P3P5 P8 P9
P10 P5 P7 P9
EXPERIMENTAL SITE
MATERIALS AND METHODS
Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait.
1200 seeds in groups of 25
Protect against predators
Experimental unit
APRIL 2006
MATERIALS AND METHODS
Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait.
LIGHT 12 EXPERIMENTAL UNITS PER PLOT OF HARVEST INTENSITY
MATERIALS AND METHODS
Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait.
LIGHT
Hemisferic photographs for light characterization
MAY 2008
MATERIALS AND METHODS
Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait.
WATER DISPONIBILITY SUMMERS 2006 AND 2007
2 litres of water
Every 15 days
MATERIALS AND METHODS
Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait.
DURING 18 MONTHS
MATERIALS AND METHODS
Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait.
Seedling harvest and laboratory proceduresNOVEMBER 2007
MATERIALS AND METHODS
Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait.
Data analysis
17 variables – 4 groups
germinationsurvival of the seeds sownsurvival of the seedlings germinated
dry weightslongitudes
mean dry weightsdry biomass
MIXED LINEAL MODEL
GERMINATION AND SURVIVAL
BIOMETRIC VARIABLES
TOTAL BIOMASS
LEAF AREA
RESULTS
Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait.
variables
Harvest (%) Summer watering
0 25 50 100 Yes+yes Yes+no No+yesNo+n
o
Germination and survival
A B A A ab a b b
Biometric variables
A A AB B b a b -
Total biomass A A A B c a bc ab
Leaf area - - - - - - - -
?
DISCUSSION
Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait.
P SUMMER (MM)
DAYS OF SUMMER
P MAY (mm)DAYS
OF MAY
2006 101.8 27 8.6 7
2007 159 30 107.4 18
NEAR 100 MM OF DIFFERENCE IN 11 DAYS MORE
THE EFECT OF SUMMER RAINFALL
CONCLUSIONS
Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait.
GROWTH AND BIOMASS
water availability has a greater influence than the harvest intensity
further research on water regimen should be carried out
GERMINATION AND SURVIVAL
light higher impact that summer rainfall
better results where 25% of the basal area was removed
THANKS!!!
FOR MORE INFORMATION: Ruano et al. 2009. Forest Ecology and Management 258, 2647–2653
