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Abstract

Woud fiber dimensions and chemical constituents were ins estigated in three fast growing trees viz Desi kikar (Robima pseudoacacio, L). Drave (Arlanius afissmma Mill (Swingle) and Saleda (Populus ciliata, Wall ex Royle) to see their suntability for the production of pulp and paper. The average fiber length, fiber diameter. fiber wall thickness and Runkel's ratio for Robinuo pseudoucacia were 0,99mm * 950002024195212251262 420 26 2002012 50 0.1. 21.15p s 2.71.2.08u *0.8 and 0.21 respectively. The corresponding values for Arlanthus altissima were 0.89mm * 0.2. 21.05u * 1.88:2.43p * 0.3 and 0.30 respectively and that for Populus ciliara were 0.96mm * 0.66. 19.78 p = 2.5; 3.02 p #0.04 and 0.24 respectively. The amount of lignin, holocellulose and alphacellulase content in Robinia pseudoacacia were in the order of 23.12%, 73.18% and 38.16% respectively. The corresponding values for Ailanthus altissima were 22.19%, 80.12% and 39.21% respectively and that for Populus cilato were 24.16% 69.10% and 37.20 respectively. The high amount of extractives and the low amount of holocellulose and alphacellulose content in the wood, when compared with other type of woods. suggest that relatively low pulp yield can be obtained from them Similarly short length and diameter of fibers claim that these woods are unsuitable for making strong paper. However Runkel's ratio suggest that a well bonded sheet could be expected from all these woods if used in moxed form with other type of long fibered soft woods.

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