Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait.
1. GESTION FORESTAL SOSTENIBLE Instituto de Investigación Universidad 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 BENITO Martes 24 de noviembre de 2009
2.
3. INTRODUCTION AND OBJETIVES Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait. Why?
4. 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
5. MATERIALS AND METHODS Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait.
6. 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 P3 P5 P8 P9 P10 P5 P7 P9 EXPERIMENTAL SITE
7. 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
8. 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
9. 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
10. 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
11. MATERIALS AND METHODS Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait. DURING 18 MONTHS
12. MATERIALS AND METHODS Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait. Seedling harvest and laboratory procedures NOVEMBER 2007
13. MATERIALS AND METHODS Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait. Data analysis 17 variables – 4 groups germination survival of the seeds sown survival of the seedlings germinated dry weights longitudes mean dry weights dry biomass MIXED LINEAL MODEL GERMINATION AND SURVIVAL BIOMETRIC VARIABLES TOTAL BIOMASS LEAF AREA
14. RESULTS Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait. ? - - - - - - - - Leaf area ab b c a c B A A A Total biomass - b a b B A B A A Biometric variables b b a a b A A B A Germination and survival No+no No+yes Yes+no Yes+yes 100 50 25 0 Summer watering Harvest (%) variables
15. DISCUSSION Influence of light and summer rainfall in germination and early development of Pinus pinaster Ait. NEAR 100 MM OF DIFFERENCE IN 11 DAYS MORE THE EFECT OF SUMMER RAINFALL 30 27 DAYS OF SUMMER 159 101.8 P SUMMER (MM) 18 107.4 2007 7 8.6 2006 DAYS OF MAY P MAY (mm)
16. 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
17. THANKS!!! FOR MORE INFORMATION: Ruano et al . 2009. Forest Ecology and Management 258, 2647–2653
