IntroductionForest supplies, in addition to wood, a diversity of important non-wood products, and plays an important role in soil protection, regulation of water resources, fixation of CO2, biodiversity con- servation, and in providing recreation activities (Palahí et al. 2004). Despite this, forest planning has dealt almost exclusively with timber production, trying to maximize the economic profit for the forest owner. However, the current demand of the society is to include non-......(论文页数是：7页) ，西语专业论文，西语毕业论文 |
