criterion 3 maintenance and encouragement of productive functions of eucalyptus j-n marien, afocel...
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Criterion 3
Maintenance and encouragement of productive functions of eucalyptus
J-N Marien, AFOCEL
Pedro Lencart, CELBI
Clara Araújo, CELBI
Juan Picos, AFG
Nuno Borralho, RAIZ
Évora, Jan 22, 1999
Proposed Indicators
31. Wood production per hectare
32. Wood production in a region
33. Growth-harvesting balance
34. Appropriate management plans in place
35. Use of genetically improved stock
36. Importance of non-wood products
31. Wood production per hectare
• Operational indicator– Wood MAI (u.b.) at rotation age
• PICL– Forest inventory plot or total stand harvested volume
• ML– Stand level
• Representativity– FMU
• Methodology– Growth models using forest inventory data
– Wood harvested from company land
• Costs– Low
• Pros/Cons– Useful for managers, simple
– High year to year variation (e.g. climate)
31. Wood production per hectare
32. Wood production in a region• Operational indicator
– Total standing volume
• PICL– Forest inventory plots
• ML– Region
• Representativity– Region
• Methodology– Forest inventory
• Costs– Low
33. Growth-harvesting balance
• Operational indicators– Total annual volume increment (ub)
– Total volume purchased by industries
• PICL– Regional or national inventory plot
– Industries
• ML– Regional or national
• Representativity– Regional or national
33. Growth-harvesting balance
• Methodology– Regional or national forest inventory results
– Industry statistics
• Costs– Low
• Pros/Cons– Simple
– National forest inventories are only available every 5 to 10 years
– Often unreliable source of purchases
34. Appropriate management plans in place
• Operational Indicators– Proportion of eucalypt stands under management plans
• PICL– FMU
• Representativity– Region
• Costs– Low
• Methodology– Areas from national forest inventory
– Areas under projects approved and supervised by Government Forest Departments
• Pros/Cons– Compliance to plans is assumed
– Difficult to define what is appropriate
34. Appropriate management plans in place
35. Use of genetically improved stock
• Operational indicator– Ratio of selected plants produced and total plants produced, as
reported by nurseries
• PICL– Nursery statistics
• Representativity– FMU or Region
• Costs– Low
• Methodology– Nursery statistics
• Pros/Cons– Most plants coming from few large nurseries
– In some years number of plants produces very different from areas planted
35. Use of genetically improved stock
36. Importance of non wood products
• Operational indicators– Percentage surface with non wood use
• PICL – Property or estate
• Representativity– Region
• Costs– Depend on level of accuracy required
• Methodology– Specific survey to forest owners by region
– Some statistics available in companies
• Pros/Cons– Difficult to estimate areas for most small scale forest
owners. Only reliable with companies and organized forest associations
36. Importance of non wood products