Relawan Kuswandi
Balai Penelitian dan Pengembangan Lingkungan Hidup dan Kehutanan Manokwari

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MODEL PERTUMBUHAN TEGAKAN HUTAN ALAM BEKAS TEBANGAN DENGAN SISTEM TEBANG PILIH DI PAPUA Relawan Kuswandi
Jurnal Pemuliaan Tanaman Hutan Vol 11, No 1 (2017): Jurnal Pemuliaan Tanaman Hutan
Publisher : Center for Forest Biotechnology and Tree Improvement (CFBTI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (507.93 KB) | DOI: 10.20886/jpth.2017.11.1.45-56

Abstract

Sustainable forest management recently calls for growth information concerning integrated functions of ingrowth, upgrowth and mortality. This study was conducted in logging concessions of PT. Tunas Timber Lestari (TTL), PT. Wapoga Mutiara Timber (WMT) dan PT. Manokwari Mandiri Lestari (MML) in Papua. Then, this research was intended to build growth stands models in logged over forest. The data were obtained from permanent sample plots (PSPs) in three logging concession in Papua forest. Results revealed that characteristics of stand namely basal area, stem density and diameter had significant coefficients to model of ingrowth, upgrowth and mortality in each logging concession. Specifically, PT WMT showed the highest value of coefficient of determination (>80%, P<0.05). For PT MML only had significant model namely ingrowth and upgrowth model while PT TTL only shwed ingrowth model as significant equation.
Development Strategy of Masoi (Cryptocarya massoia (Oken) Kosterm.) as Non-Timber Forest Products in Teluk Bintuni, West Papua With SWOT Analysis Baharinawati Wilhan Hastanti; Relawan Kuswandi; Julanda Noya
Jurnal Wasian Vol 5, No 1 (2018): Jurnal Wasian
Publisher : Balai Penerapan Standar Instrumen Lingkungan Hidup dan Kehutanan (BPPLHK)Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jwas.v5i1.4202

Abstract

Non-timber forest products (NTFPs) are forest resources which have comparative advantage and in direct contact with the community. Masoi (Cryptocarya masoia) is one of mainstay Papua NTFPs. This essential oil that produced through bark distillation, used as aromatic raw materials for food, medicines, perfume,s and aromatherapy. The demands of masoi oil are high for domestic and foreign market. This study aimed to formulate development strategy of masoi as non-timber forest products in Teluk Bintuni regency, Papua Barat Province, by identifying external factors (Opportunities, threats) and internal factors (strengths, weaknesses). The research applied SWOT analysis methods by identifying external factors (EFAS) and internal factors (IFAS) as strength, weaknesses, opportunities, and threats. Based on SWOT analysis which conducted by calculate score of external factors and internal factors, the suitable strategy was WO strategy which utilized opportunities to suppress the weaknesses at third quadrant. The third quadrant tended turn around by 1). Socialization and training of masoi cultivation on indigenous people, 2). Legal Counseling to increase legal awareness of the community to overcome land disputes.Keywords: strategy, development, masoi, nontimber forest products (NTFPs), SWOT
Timber Volume Estimation Model for Merchantable Tree Species in Sarmi Regency, Papua Relawan Kuswandi
Jurnal Wasian Vol 3, No 2 (2016): Jurnal Wasian
Publisher : Balai Penerapan Standar Instrumen Lingkungan Hidup dan Kehutanan (BPPLHK)Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jwas.v3i2.1982

Abstract

Precise forest inventory to estimate standing stock is needed in forest management planning.  Therefore, it is necessary to have proper and reliable tools in estimating merchantable timber volume. This research was intended to build an accurate model to estimate timber volume for  merchantable species in logging concession of PT Wapoga Mutiara Timber, Sarmi Regency.  Regression equation between diameter and length did not have a significant correlation (coefficient of determination, R2 = 6.7 %). The best equation to estimate table tree volume based on validation test in logging concession of PT Wapoga Mutiara Timber was Log V = - 3.34 + 2.16 log d.     
Timber Volume Estimation Model for Commercial Tree Species in the Logging Area Concession of PT. Tunas Timber Lestari in Boven Digul, Papua Freddy Jontara Hutapea; Relawan Kuswandi
Jurnal Wasian Vol 6, No 1 (2019): Jurnal Wasian
Publisher : Balai Penerapan Standar Instrumen Lingkungan Hidup dan Kehutanan (BPPLHK)Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jwas.v6i1.4714

Abstract

The volume estimation model is one of the most important components in developing sustainable forest management. Nowadays, various models for various types of forests in Indonesia have developed. Nevertheless, these models do not represent the type of forest ecosystem in Papua. Therefore,  numerous studies are still needed to develop volume estimation model for various types of forests in Papua. This study was aimed to develop timber volume estimation model for commercial tree species in logging concession of PT. Tunas Timber Lestari in Sesnukt District, Boven Digul Regency, Papua Province. A total of 164 trees were chosen to develop the model and 50 trees for model validation. The result showed that diameter did not have a strong correlation with tree height. Therefore, the model should be developed using the combination of diameter and tree height. The best model in the development stage was selected based on the value of coefficient of determination (R2), standard error of the estimate (SEE), and Ftest. The best model in the validation stage was selected based on the value of bias (e), root mean square errors (RMSE), average deviation (SR), aggregative deviation (SA), and χ2test.. The best model for timber volume estimation in PT. Tunas Timber Lestari are V = 0.00007594 D1.978 H0.923. Keywords: commercial tree species, diameter, timber volume estimation, tree height, volume
Development Strategy of Masoi (Cryptocarya massoia (Oken) Kosterm.) as Non-Timber Forest Products in Teluk Bintuni, West Papua With SWOT Analysis Baharinawati Wilhan Hastanti; Relawan Kuswandi; Julanda Noya
Jurnal Wasian Vol 5, No 1 (2018): Jurnal Wasian
Publisher : Balai Penerapan Standar Instrumen Lingkungan Hidup dan Kehutanan (BPPLHK)Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (941.477 KB) | DOI: 10.20886/jwas.v5i1.4202

Abstract

Non-timber forest products (NTFPs) are forest resources which have comparative advantage and in direct contact with the community. Masoi (Cryptocarya masoia) is one of mainstay Papua NTFPs. This essential oil that produced through bark distillation, used as aromatic raw materials for food, medicines, perfume,s and aromatherapy. The demands of masoi oil are high for domestic and foreign market. This study aimed to formulate development strategy of masoi as non-timber forest products in Teluk Bintuni regency, Papua Barat Province, by identifying external factors (Opportunities, threats) and internal factors (strengths, weaknesses). The research applied SWOT analysis methods by identifying external factors (EFAS) and internal factors (IFAS) as strength, weaknesses, opportunities, and threats. Based on SWOT analysis which conducted by calculate score of external factors and internal factors, the suitable strategy was WO strategy which utilized opportunities to suppress the weaknesses at third quadrant. The third quadrant tended turn around by 1). Socialization and training of masoi cultivation on indigenous people, 2). Legal Counseling to increase legal awareness of the community to overcome land disputes.Keywords: strategy, development, masoi, nontimber forest products (NTFPs), SWOT
Timber Volume Estimation Model for Commercial Tree Species in the Logging Area Concession of PT. Tunas Timber Lestari in Boven Digul, Papua Freddy Jontara Hutapea; Relawan Kuswandi
Jurnal Wasian Vol 6, No 1 (2019): Jurnal Wasian
Publisher : Balai Penerapan Standar Instrumen Lingkungan Hidup dan Kehutanan (BPPLHK)Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (504.618 KB) | DOI: 10.20886/jwas.v6i1.4714

Abstract

The volume estimation model is one of the most important components in developing sustainable forest management. Nowadays, various models for various types of forests in Indonesia have developed. Nevertheless, these models do not represent the type of forest ecosystem in Papua. Therefore,  numerous studies are still needed to develop volume estimation model for various types of forests in Papua. This study was aimed to develop timber volume estimation model for commercial tree species in logging concession of PT. Tunas Timber Lestari in Sesnukt District, Boven Digul Regency, Papua Province. A total of 164 trees were chosen to develop the model and 50 trees for model validation. The result showed that diameter did not have a strong correlation with tree height. Therefore, the model should be developed using the combination of diameter and tree height. The best model in the development stage was selected based on the value of coefficient of determination (R2), standard error of the estimate (SEE), and Ftest. The best model in the validation stage was selected based on the value of bias (e), root mean square errors (RMSE), average deviation (SR), aggregative deviation (SA), and χ2test.. The best model for timber volume estimation in PT. Tunas Timber Lestari are V = 0.00007594 D1.978 H0.923. Keywords: commercial tree species, diameter, timber volume estimation, tree height, volume
Timber Volume Estimation Model for Merchantable Tree Species in Sarmi Regency, Papua Relawan Kuswandi
Jurnal Wasian Vol 3, No 2 (2016): Jurnal Wasian
Publisher : Balai Penerapan Standar Instrumen Lingkungan Hidup dan Kehutanan (BPPLHK)Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (53.248 KB) | DOI: 10.20886/jwas.v3i2.1982

Abstract

Precise forest inventory to estimate standing stock is needed in forest management planning.  Therefore, it is necessary to have proper and reliable tools in estimating merchantable timber volume. This research was intended to build an accurate model to estimate timber volume for  merchantable species in logging concession of PT Wapoga Mutiara Timber, Sarmi Regency.  Regression equation between diameter and length did not have a significant correlation (coefficient of determination, R2 = 6.7 %). The best equation to estimate table tree volume based on validation test in logging concession of PT Wapoga Mutiara Timber was Log V = - 3.34 + 2.16 log d.