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- Light/night treatments for spruce? • minor changes in day temp. • short nights for good growth and avoidance of bud set
- Light/night treatments for pine? • low night temp., high day temp. (stimulates fall hardening) • longer night treatment
- What stimulates the fall hardening in spruce? What ... • spruce: supplemental light for growth (critical night), long night treatment stops growth • pine: no early bud set, therefore, no supplemental light! Fall hardening stimulated by low night temp. ...
- Impacts of light shortage? • seedlings tall and with weak stems • branches will not develop normally • reasons: to late, early sowing. to high density
- seedling quality? How determine? It is a combination of height, diameter, plant nutrition, health, root size and also shape. Together, these characteristics determine the establishment in the field, and mortality. - Root electrolyte ...
- RnD in nurseries? • establish seedlings (clones) storaged in freezers, can be put out and start growing immediately. • clones for more and better natural regeneration
- Planting. Advantages of ground scarification? • better in competing against birch etc. • better climate (+1-2°c) • accessability to mineral soil • pine weevel resistancy