Tree Diameters and Planting Distance as the Most Important Factors for the Liberation of Tree Competitors in Silvicultural Systems of TPTJ
Agriculture, Forestry and Fisheries
Volume 3, Issue 5, October 2014, Pages: 392-396
Received: Oct. 1, 2014; Accepted: Oct. 21, 2014; Published: Oct. 30, 2014
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Authors
Prijanto Pamoengkas, Department of Silviculture, Faculty of Forestry, Bogor Agricultural University, Academic Ring Road, Campus IPB Darmaga, PO Box 168 Bogor 16680, Indonesia
Seca Gandaseca, Department Forest Production, Faculty of Forestry, University of Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
Gusti Hardiansyah, Faculty of Forestry, University of Tanjungpura, Pontianak, West Kalimantan
Priyanto , Department of Forest Management, Faculty of Forestry, Bogor Agricultural University, Academic Ring Road, Campus IPB Darmaga, PO Box 168 Bogor 16680, Indonesia
Muhamad Rizky Jamaludin, Department of Silviculture, Faculty of Forestry, Bogor Agricultural University, Academic Ring Road, Campus IPB Darmaga, PO Box 168 Bogor 16680, Indonesia
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Abstract
Maintenance of forest plants intensively under the selective cutting and line planting system (TPTJ) will accelerate the growth of plant species. Widening the line planting improves the penetrating light, thus increasing growth rate of the plants. The purpose of this study was to determine the relationship between stem diameter and distance of competitor tree to forest plant, as well as stem diameter and canopy diameter as a basis for the liberation of competitor trees on the TPTJ system. Regression analysis showed that the competitor trees diameter and distance can be used as one technique of vertical liberation with equation correlation for both variables is X = 3.567  0797dbh+ 0.121dbh2  0.004dbh3. The approach of liberation using correlation between stem diameter and canopy diameter can not be used as a vertical liberation technique with equation correlation between the two variables is Cda = 2.535  0.031dbh + 0.050dbh2  0.002dbh3. The study revealed that saplings with diameter (dbh) 59 cm located at 12.5 m of subplots must be slashed down. For sapling with diameter (dbh) ≥10 cm dbh located at 35 m of the center of planting line must be girdled.
Keywords
Selective Cutting and Line Planting System, Forest Productivities, Widening of Line Planting, Vertical Liberation, Maintenance of Plants
To cite this article
Prijanto Pamoengkas, Seca Gandaseca, Gusti Hardiansyah, Priyanto , Muhamad Rizky Jamaludin, Tree Diameters and Planting Distance as the Most Important Factors for the Liberation of Tree Competitors in Silvicultural Systems of TPTJ, Agriculture, Forestry and Fisheries. Vol. 3, No. 5, 2014, pp. 392-396. doi: 10.11648/j.aff.20140305.20
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