The Paulownia Crop, a forestry Revolution
Plantation: Generally in spring. If temperatures don’t reach below -5ºC it is possible to plant throughout the year.
Technical cut: Cutting the tree down to ground level (4cm approx) during dormancy period (winter) with the purpose to form a highly valuable straight trunk knot-free . The technical cut is only made once the tree reaches a minimum of 5-8cm on the base.
Sprout Selection: Choosing the straightest and quickest growing sprout after the technical cut. The others are to be removed. The one we choose will form our commercial log.
Prunning: For timber production, prunning the young axillary buds on the 2º and 3º year until obtaining a clean log of 5-6 meters free of branches (not the leafs).
Land clearance: Only during first and second year. Paulownia tolerates intercropping.
Sprouting: Paulownia sprouts again after being cut, providing even a higher productivity. Between 5 to 6 crops for biomass with cycles of 3-4 years and 3 and 4 crops for timber production with 8-10 year cycles.
- For biomass: 4×2 meters (1.200 trees per hectare)
- For timber: 5×5 or 6×6 (400 – 300 trees per hectare)
- For biomass: 3-4 year cycles (between 30 and 60 Tn at 30% humidity per hectare and year)
- For timber: 8-10 year cycles (1.3m3 of usable wood per tree)
Type of soil: Paulownia adapts well to all type of soil, except high waterlogging soils, with high salt concentration or high percentange of clay.
Recommended PH between 5.0 and 7.5
- 1st year: 150 UFN
- 2nd year: 250 UFN
- 3rd year and subsequents: 400 UFN
Recommended subsoiling: minimum deph of 80cm.
Irrigation: Depending on area, climate and soil humidity. For humid climates irrigation is not neccesary.
Optimum water needs: 2.500m3 per hectare.