Profitability of continuous-cover forestry in Norway spruce dominated peatland forest and the role of water table.

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From: Canadian Journal of Forest Research(Vol. 51, Issue 6)
Publisher: NRC Research Press
Document Type: Report
Length: 9,806 words
Lexile Measure: 1440L

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Abstract :

Continuous-cover forestry (CCF) is expected to reduce the negative environmental impacts of peatland forestry in comparison with rotation forestry (RF), but the unknown profitability of CCF on peatlands limits its application in practice. The profitability of CCF was analyzed by simulating management scenarios with a process-based ecosystem model, EFIMOD, which was complemented to describe the interplay between tree growth and water table depth, which is typical of peatland forests. A variety of harvest intervals and post-harvest basal areas for a mature Norway spruce (Picea abies (L.) Karst.) dominated stand was simulated on a nutrient-rich peatland site. Conventional RF was simulated for comparison. CCF provided a higher profit than RF. The best financial performance was obtained with a 15-year harvest interval regardless of interest rate, although the overall profitability of CCF depended on the interest rate used. Ditch network maintenance was needed to maintain the stand growth only when the post-harvest basal area was smaller than 10 [m.sup.2] * [ha.sup.-1]. There were many CCF scenarios in which the difference in the net present value of harvest revenues was within 10% compared with the best CCF scenario. Hence, there are many relatively profitable CCF harvesting alternatives for forest management in boreal spruce-dominated peatland forests. Key words: forest economics, forest management, uneven-aged forestry. Comparativement au rendement soutenu (RS), le couvert forestier permanent (CFP) devrait reduire les impacts negatifs de l'exploitation forestiere des tourbieres, mais le fait que la rentabilite du CFP dans les tourbieres ne soit pas connue limite en pratique son application. La rentabilite du CFP a ete analysee en simulant des scenarios d'amenagement avec un modele ecosystemique, EFIMOD, qui a ete complete pour decrire l'interaction typique dans les tourbieres boisees entre la croissance des arbres et la profondeur de la nappe phreatique. Une variete d'intervalles de recolte et de surfaces terrieres residuelles pour un peuplement mature domine par l'epicea commun (Picea abies (L.) Karst.) a ete simulee dans une tourbiere riche en nutriments. Le RS conventionnel a ete simule a des fins de comparaison. Le CFP a genere des profits plus eleves que le RS. La meilleure performance financiere a ete obtenue avec un intervalle de recolte de 15 ans peu importe le taux d'interet, meme si la rentabilite globale du CFP dependait du taux d'interet utilise. L'entretien des reseaux de fosses etait necessaire pour maintenir la croissance du peuplement seulement lorsque la surface terriere residuelle etait inferieure a 10 [m.sup.2] * [ha.sup.-1]. La valeur actualisee nette des revenus de la recolte de plusieurs scenarios de CFP atteignait au moins 10 % de celle du meilleur scenario de CFP. Par consequent, il existe plusieurs choix de recolte relativement rentables dans le cas du CFP pour l'amenagement forestier dans les tourbieres boreales boisees dominees par l'epicea commun. Mots-cles: economie forestiere, amenagement forestier, foresterie inequienne.

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Gale Document Number: GALE|A667587788