Home⇛Science and Technology Journal⇛vol. 7 no. 2 (2018)

Location And Assessment Of Individual Plus Trees Of Some Dipterocarps And Premium Indigenous Tree Species In Ilocos Norte

Roseller R. Ayson | Joselito I. Rosario | Charito L. Samsam | Sergia P. Garma | Dionisio L. Jamias

Discipline: Forestry and Arboriculture

 

Abstract:

One mechanism to conserve germplasms of threatened tree species is collection and preservation of planting materials from superior mother trees. Thus, a study was conducted to locate individual plus trees (IPTs) of dipterocarps and premium indigenous tree species; characterize and assess the phenotypic quality of these trees; and develop data base and maps on their distribution in Ilocos Norte, Philippines. Potential IPTs were assessed using the protocol for hardwood species. Candidate trees were assessed based on stem characteristics, bole form, health and branching characteristics. A total of 237 IPTs under 13 species were identified: seven Dipterocarps species and six premium wood species. These trees were identified in the City of Batac, and in the municipalities of Dingras, Pagudpud, Pasuquin, Piddig and Nueva Era. Pagudpud had the most diverse species of IPTs, with seven species, followed by Nueva Era with five species. Selected IPTs of Dracontomelon dao and all the dipterocarps species were in second growth natural forests, while Intsia bijuga, Vitex parviflora, Pterocarpus indicus and Sindura supa were in plantations. Top five species in terms of number of selected IPTs were P. indicus, Anisoptera thurifera, Shorea polysperma, S. contorta, and Hopea plagata. Geographic Information System (GIS) generated maps, which include the location and data base of the attributes of the selected IPTs, were developed. The database is deposited in the custody of the Mariano Marcos State University Research Directorate and can be accessible to qualified



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