Sustained-yield treatment of Malabuho (Sterculia oblongata R. Br.) [Philippines]
1986
Ella, A.B. (Forest Products Research and Development Inst., Los Banos, Laguna (Philippines))
A total of 21 healthy Malabuho trees with diameter at breast height (dbh) of 20 to 65 cm were stripped of their barks by means of three different stripping methods. Quarterly observations were conducted on the callus formation of the trees stripped. At the end of the study, 19 trees survived and produced complete but with varying degrees of calluses which sustained the productivity of the trees. The diffferent stripping methods appeared to have no significant effect on callus formation. The regeneration of barks are mainly attributed to the meristematic cambial activity. The extent of damage inflicted on the cambium layer in stripping resulted in the death of one tree. Another one was either felled, broken or uprooted during typhoons that often hit the experimental area. Analysis of some mechanical properties of extracted bast fibers, e.g. folding endurance, tensile strength, and elongation properties met the minimum requirements of the appropriate TAPPI (Technical Association of the Pulp and Paper Industry) Standard Test methods
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