Profit–Size Relationships: A Wood Value Expression to Facilitate Stand Management Decision Making
Tóm tắt
This paper presents an alternative approach to expressing net value of wood in standing trees in relation to important tree characteristics. The approach aims at increasing woodlot owners’ and managers’ understanding of stand profit production and lead to consideration of stand interventions with higher profitability than those suggested by commonly used guidelines designed for maintaining biologically desirable stock levels. Our investigation showed that determining net wood value in individual trees for stand management purposes is not only feasible but relatively simple to do, requiring little additional information than typically used in stand level cash flow analysis. The presentation of wood value in the form of profit–size relationships presents two major improvements over traditional stand average values and product stumpage values: (1) it links both revenues and costs to determinant tree characteristics, providing a clearer picture of actual financial contributions of trees to stand value. (2) it gives the value of all wood grown and not just the value of volume sold. These two improvements allow landowners and managers to actually see where value is produced in specific stands, and design treatments accordingly to capture financial opportunities that would otherwise go unnoticed.
Tài liệu tham khảo
Anonymous (2008) 2007 Stumpage prices by Maine county. Department of conservation, Maine Forest Service, Forest Policy and Management Division, 22 p.
Davis LS, Johnson KN (1987) Forest management. McGraw-Hill, Montreal, p 790
Davis LS, Johnson KN, Bettinger P, Howard TE (2001) Forest management; to sustain ecological, economic, and social values. Waveland Press, Inc, Long Grove, p 804
Honer TG, Ker MF, Alemdag IS (1983) Metric timber tables for the commercial tree species of central and eastern Canada. Canadian Forestry Service, Environment Canada. Information Report M-X-140, 139 p.
Hotvedt JE, Straka TJ (1987) Using residual values to analyse the economics of Southern pine thinning. Southern Journal of Applied Forestry 11:99–106
Lu F, Gong P (2005) Adaptive thinning strategies for mixed-species stand management with stochastic prices. Journal of Forest Economics 11:53–71
Mitlin DC (1987) Price-size curves for conifers. Forestry Commission, Planning and surveys division, Great Britain. Bulletin 68, 14 p.
OMNR (1998) A silvicultural guide for the tolerant hardwood forest in Ontario. Toronto, Ont. Min. Nat. Resour. Queen’s Printer for Ontario, 500 p.
Palahi M, Pukkala T (2003) Optimising the management of Scots pine (Pinus sylvestris L.) stands in Spain based on individual-tree models. Ann For Sci 60:105–114
Pelletier G, Pitt DG (2008) Silvicultural responses of two spruce plantations to midrotation commercial thinning in New Brunswick. Can J For Res 38:851–867
Price C (1989) The theory and application of forest economics. Basil Blackwell Ltd, Oxford, p 402
Zhang SY, Lei YC, Jiang ZH (2006) Modelling the relationship of tree-level product value with tree characteristics in black spruce. For Chron 82(5):690–699