[en]+[zh]Study on Forest Landscape Restoration - ITTO

188 <strong>Study</strong> on Forest Landscape Restoration
and planted forests and agroforestry and other configurations of on-farm trees.
The specific activities of any FLR initiative could include one or more site-level
techniques. Indeed, a fundam<strong>en</strong>tal characteristic of FLR is the use of combined
technical approaches to solve problems, rather than relying on one particular
type of interv<strong>en</strong>tion.
5.7.1 Analysis of characteristics of degraded and secondary forests
Analysis of characteristics of degraded primary forests in the view of forest
managem<strong>en</strong>t would contribute to develop site level restoration measures in the
light of local conditions. Characteristics of degraded primary forests in Dagan
FLR demonstration area were analyzed. The community was composed of arbor
storey, shrub storey and grass storey. The arbor storey has high species
diversity and the Shannon-Wi<strong>en</strong>er index (SW) is 3.61 - 4. 46. Dominant
species in the inv<strong>en</strong>toried communities are (1) Garcinia oblongifolia and Hopea
exalata, (2) Engelhardtia roxburghiana and Garcinia oblongifolia, (3)
Amesidod<strong>en</strong>dron chin<strong>en</strong>se and Garcinia oblongifolia, and (4) Sarcosperma laurinum,
Dalbergia hainan<strong>en</strong>sis and Polyalthia laui respectively. The stand average
DBH, height, growing stock and d<strong>en</strong>sity are 10. 2 - 14. 3cm, 8. 50 -
13. 39m, 142.51 -199.44 m 3 /ha and 2,321 -3,545 N/ha respectively. The
DHB distribution of each degraded primary forests showed the inverse J
shape. Most of valuable trees in the sub-storey I in arbor storey have be<strong>en</strong>
harvested while there are still many valuable native trees with better stem form
such as Dalbergia odorifera, Hopea exalata, Vatica mangachapoi and Litchi
chin<strong>en</strong>sis because of the disturbances such as repeated selective cutting. Shrub
storey and grass storey in each forest stand have rich species and valuable tree
saplings and seedlings. Compared to degraded primary forest, secondary forest
has simple community structure and low diversity, but with valuable native
trees and timber species in arbor storey.
5.7.2 Site-level restoration strategies
Protection and natural recovery of degraded primary forest
Degraded primary forests still retains the main characteristics of the original
forest, such as species composition, soil structure and stand structure, and
has capacity of natural reg<strong>en</strong>eration, and has important function of ecological
protection, so a basic managem<strong>en</strong>t principle of forest restoration is to "decompress"
, that is degraded primary forests can be restored as managed primary