PENGARUH INTENSITAS PENEBANGAN DAN LERENG TERHADAP KETERBUKAAN TANAH

Jurnalis Thaib

Sari


Ground exposure is one of  the stand damages caused by logging. Logging  which generally do not comply with  the stipulation  of the Indonesian  Selective  Cutting (TPI) system,  have caused varying  degrees of ground  exposure as follows:

On slopes of  0 - 25% where  the number of trees felled per hectare are 0 - 4,5 - 9 and 10 or up, ground exposure varied between 5.4 -13.8%,  13.4 - 22.5%,  and 20.9 - 26.6%  respectively.

On slopes of  26% and up,  where  the number  of  trees felled per hectare are 0 - 4, 5 -  9 and 10 or up,  ground  exposure  varied between 7.6 - 13.8%, 11.9 - 19.7% and  17.1- 24.6% respectively.

Dominant  factors in the process of ground  exposure  are management,  particularly  with regard to the organization of skidding and hauling activities,  and  the number  of  trees felled  per unit area. Unproductive  tractor movements  e.g. in locating logs,  increases ground  exposures and total cost per unit logs produced,  and should therefore  be avoided.

Kata Kunci


effect; intensity; slope; ground exposure

Teks Lengkap:

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Referensi


Direktorat Reboisasi dan Rehabilitasi Kehutanan, 1980. Pedoman Tebang Pilih Indonesia. Penerbitan, No. A-56, 109 pp.

Ewel, J. and L. Conde, 1978. Environmental implication of any species utilization in the moist tropics. Proc. of conference on improved utilization of tropical forest. Forest Lab. Forest Service US Dept. of Agriculture, p 106-123.

Gilmour, D.A., 1977. Logging and environment, with particular reference to soil and stream protection in tropical rain forest situations. Guidelines for watershed management. FAO, United Nations, Rome, p 223-235.

Sinden, J.A.,1978. Evaluation and analysis of environmental impacts of forestry. Makalah pokok pada Kongres Kehutanan Sedunia ke VIII di Jakarta, Indonesia, 16 pp.




DOI: https://doi.org/10.20886/jphh.1985.2.4.28-32

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