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Jurnal Penelitian Hasil Hutan
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Search results for , issue " Vol 9, No 5 (1991): Jurnal Penelitian Hasil Hutan" : 2 Documents clear
ANALISIS KIMIA BATANG AREN (ARENGA PINNATA MERR) YANG BERASAL DARI CIANJUR DAN ANALISIS PENDAHULUAN KAYU AREN YANG BERASAL DARI SUMATERA BARAT Gusmailina, Gusmailina; Hartoyo, Hartoyo
Jurnal Penelitian Hasil Hutan Vol 9, No 5 (1991): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.1991.9.5.177- 182

Abstract

This article describes  about  Chemical  analysis of aren stem  (Arenga  pinnata  Mcrr) from   Cianjur  and preliminary   analysis aren wood from   West Sumatera.   The analysis comprised  of the determination    of holocelluloce,  lignin, pentosan,   tannin,  ash content,  silica content,  and the solubility  in cold  water,  hot  water,  one  percent  of sodium   hydroxide   and  alcohol-benzene   extractives.   The  analysis  were conducted   to determine  the chemical  component   of  aren stem from  Jasinga,   Bogor  and  chemical  component   of  coconut  wood.The average of holocelluloce,   lignin,  pentosan,   tannin,  ash and silica, extractives content,  solubility  in sodium  hydroxide   of peripheral portion  for  aren stem from   Cianjur  were consecutively   as follow:    67,79  %,  22,17  %,  19,43 %,  4,07  %,  0,94  %,  0,67  %,  5,62  %  (in hot water),  5, 14 % (in cold  water),  2,69  % (in alcohol-benzene),    24, 79 % in sodium   hydroxide   1   %.   While for  the central portion,   the above analysis  showed   averages  as follow   :  48,07  %,  22,95  %,  19,3  %,  16,98  %,  4,41  %,  3,92  %,  17,51  % (in hot  water),  12,81  % (in cold water),  7,83  %  (in akohol   benzene),   31,12  % in sodium   hydroxide   1   %.The average of holocelluloce,   lignin, pentosan,   tannin,  ash and silica, extractives content,  solubility  in sodium  hidroxide.  of  aren wood (peripheral  portion)  for  63,93  %,  27,08  %,  11,17 %,  5,12  %,   1,50   %,   0,99  %,  1,02 %  (in cold  water),  2,99  %  (in hot  water) 4,50  %  (in alcohol-benzene),   28,69  % in sodium  hydroxide.   While for  the ruyung  enau,  the above  analysis showed  averages as follow  :  68,83  %,  22,93 %,  14,0  %,  5,78  %,  1,25  %,  0,92  %,  0,22  %  (in cold  water),  3,01  %  (in hot  water),  3,98  %  (in alcohol-  benzene),   35,57  %  in sodium hydroxide.Based  on  chemical  analysis  and  the comparison   to the coconut  wood  gave  a low pentosan  and  ash content from   coconut  wood.  On the contrary  had  a high  tannin,  extractives  and silica content  to coconut  wood.
ANALISIS PEMBANGUNAN PRASARANA ANGKUTAN DAN EKSTRAKsl KAYU SERTA DAMPAKNYA. TERHADAP LINGKUNGAN HUTAN DI PROPINSI RIAU tinambunan, Djaban
Jurnal Penelitian Hasil Hutan Vol 9, No 5 (1991): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (11553.649 KB) | DOI: 10.20886/jphh.1991.9.5.193-200

Abstract

An investigation on various aspects of timber harvesting practicues in two loggini companies in Riau has been  conducud in June 1991. One of them is operating in dry  land forests  and the other is in swamp forests.Road construction in the first  company is accomplished by the steps of selecting route Iocation, land clearing and road forming, road grading, and right of way clearing with the total cost of Rp. 3.8 million/km. Whereas, log extraction is done by the steps of felling, skidding, debarking, loading, hauling and unloading with the total cost of Rp. 8,210/cu.m.In swamp forests,  rail  road construction follows the steps of route survey, right of way clearing, installing rall suppors and steel rails with the cost of Rp. 8,420,000/km, including the costs of logs used for the supports amountr to 151  cu.m/km and steel rails. By using this facility and manual (kuda-kuda) skidding, it is found that the cost of log extraction  is Rp. 13,250/cu.m.Logging roads have many land openings and steep, bare soils so that they are in the condition of high soil erosion potential. Whereas, for rail roads, it is noticed that their soil erosion is low because the land on both sides and under  the rails is well covered by litter,  logs  and vegelation roots.

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