Efficiency of blanket and selective climber cutting at Deramakot Forest Reserve, Sabah

Yeong , Kok Loong (2009) Efficiency of blanket and selective climber cutting at Deramakot Forest Reserve, Sabah. Masters thesis, Universiti Malaysia Sabah.

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Abstract

The efficiency of blanket (BCC) and selective climber cutting (SCC) in terms of time and cost, regenerative capacity of cut climbers and growth rate of Potential Crop Trees (PCTs; 5≤30 cm DBH) in Deramakot Forest Reserve, Sabah (DFR) was investigated in this thesis. This study was conducted in Compartment 60 and 61 of OFR which were representative of the logged forests in Sabah. The experimental design for this study was a uni-factorial randomized complete block design (RCBD) that comprised of three 50x50m plots in a Block with ten replicates. The climber density (> 1 cm DBH) in the study site was enumerated only in the Control. Climbers (> 1 cm OBH) were not enumerated in the BCC and SCC but assumed to be similar with the Control. In BCC and SCC, only climbers on tress greater than 30cm OBH were enumerated. The density of climbers greater than 1 cm DBH in DFR was 404±235 stems ha⁻¹, belonging to 46 species in 34 genera and 24 families. Climber densities on trees greater than 30 cm DBH in BCC, SCC and Control were 159±142 (SD), 164±100 and 117±64 stems ha⁻¹, respectively. All climbers were removed in BCC while only climbers on trees greater than 30cm DBH were removed in SCC. Climbers were intact in the Control. The time taken to cut climbers in BCC [45.73±17.92 (SD) minutes ha⁻¹] was 52% longer than SCC [29.99±7.72 minutes ha⁻¹; Paired t-test; N= 10; t=2.293, p=0.048]. The number of coppiced climber stumps, after cutting between BCC (8%) and SCC (5%) after 6 months was not significant (Pearson Chi-Square; N=10; X² =1.667, df=1, p=0.197). The Relative Growth Rate (RGR) of PCTs in BCC was 0.057±0.02 (SD) cm month⁻¹, SCC was 0.043±0.017 cm month⁻¹and Control was 0.036±0.012 cm month⁻¹. A significant difference in RGR was found between Bec and Control (Tukey's HSD; p=0.032) but none between BCC and SCC (Tukey's HSD; p=0.183). Given that SCC was as efficient as BCC treatment, SCC should be adopted in DFR, Sabah.

Item Type:Thesis (Masters)
Uncontrolled Keywords:climber cutting, blanket and selective climber cutting, Deramakot Forest Reserve, Sabah
Subjects:S Agriculture > SD Forestry
Divisions:SCHOOL > School of International Tropical Forestry
ID Code:9171
Deposited By:IR Admin
Deposited On:09 Jun 2014 11:53
Last Modified:09 Jun 2014 11:53

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