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Soil chemical properties influences on the growth performance of Eucalyptus urophylla planted in dryland ecosystems, East Nusa Tenggara Ronggo Sadono; Wahyu Wardhana; Pandu Yudha Adi Putra Wirabuana; Fahmi Idris
Journal of Degraded and Mining Lands Management Vol 8, No 2 (2021)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2021.082.2635

Understanding the relationship between soil chemical characteristics and forest productivity is importantly required to support sustainable forest management, mainly in eucalyptus plantation. This study investigated the influence of soil chemical properties on the growth performance of Eucalyptus urophylla which established in dryland ecosystems, East Nusa Tenggara. Forest inventory was undertaken by N-trees sampling in the priority locations for E. urophylla development, located in Buat, Fatukoto1, and Fatukoto2. Four parameters were selected to describe the growth performance of E. urophylla, comprising diameter, height, volume, and mean annual increment. In each sampling point, soil sample was collected at the depths of 0-10, 11-20, and 21-30 cm. Then, the sample was composited before brought to the laboratory for quality analysis. Six parameters were selected to quantify the soil chemical characteristics, namely soil acidity (pH), soil organic carbon (SOC), total nitrogen (TN), available phosphorus (Av-P), exchangeable potassium (Exc-K), and cation exchange capacity (CEC). Results found that soil chemical properties from three locations were significantly different in pH, SOC, Av-P, and CEC. However, this study recorded the content of TN and Exc-K were statistically equal among the three sites. Difference soil chemical properties were also followed by the variation growth of E. urophylla, particularly in diameter and height. The highest volume of eucalyptus stand was observed in Fatukoto1 (181.06+95.46 m3 ha-1), followed by Buat (142.67+27.19 m3 ha-1) and FatukotoII (99.09+62.46 m3 ha-1). There were four soil parameters that meaningfully affected the growth performance of E. urophylla, i.e. pH, Av-P, Exc-K, and CEC. Among those parameters, Av-P demonstrated a consistent effect on the growth performance of E. urophylla. According to these findings, this study concluded that Av-P substantially provided higher effect on the growth performance of E. urophylla than other soil chemical parameters.

Productivity evaluation of Eucalyptus urophylla plantation established in dryland ecosystems, East Nusa Tenggara Ronggo Sadono; Wahyu Wardhana; Pandu Yudha Adi Putra Wirabuana; Fahmi Idris
Journal of Degraded and Mining Lands Management Vol 8, No 1 (2020)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2020.081.2461

The establishment of the Eucalyptus urophylla plantation has a potential contribution to the improvement of dryland ecosystem productivity in East Nusa Tenggara. However, the productivity of E. urophylla stand in this area is rarely documented even though it has been managed for more than 20 years. This study was directed to evaluate the growth performance, biomass accumulation, and carbon storage in E. urophylla plantation managed by Timor Tengah Selatan Forest Management Unit (FMU). Data were collected by a field survey using N-trees sampling method. Results demonstrated the mean tree density of E. urophylla in this area was 182 trees/ha with an average stand volume of 150.12 m3/ha. The mean annual increment in volume varied from 1.83 to 19.45 m3/year. The mean biomass accumulation and carbon storage in E. urophylla plantation approached 171.76 and 52.25 Mg/ha. Around 65% of total biomass and carbon storage were accumulated in the stem. Interestingly, the relative contribution of the stem to total biomass increased slowly with diameter class increasing while the dissimilar trend was observed in root, branch, and foliage. Based on the results, this study confirmed that the existence of E. urophylla plantation could increase the productivity of dryland ecosystem in East Nusa Tenggara.

MEMPERTENTANGKAN ATAU MEMPERSATUKAN? PEMBELAJARAN DARI TERBITNYA KEBIJAKAN PINJAM PAKAI KAWASAN HUTAN DI INDONESIA Suprapto Suprapto; San Afri Awang; Ahmad Maryudi; Wahyu Wardhana
Jurnal Ecogreen Vol 5, No 1 (2019)
Publisher : Universitas Haluoleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (244.313 KB)

AbstrakSumber daya lahan di Indonesia dapat dimanfaatkan dalam berbagai sektor berbasis lahan antara lain pertambangan dan kehutanan. Areal konsesi pertambangan banyak yang bersinggungan dengan kawasan hutan, sehingga dapat meningkatkan potensi konflik terutama di era desentralisasi. Izin pinjam pakai kawasan hutan merupakan salah satu upaya yang dapat dilakukan untuk menjembatani kepentingan kedua sektor. Tujuan tulisan ini adalah menganalisis kebijakan izin pinjam pakai kawasan hutan untuk mengantisipasi pembangunan di luar kehutanan. Metode yang digunakan dalam penelitian adalah metode/pendekatan kualitatif. Pengumpulan data dilakukan melalui wawancara, observasi dan dokumen review. berdasarkan penelitian mengungkap bahwa tumpang tindih areal konsesi pertambangan dengan kehutanan diakibatkan tumpang tindihnya tugas dan fungsi birokrasi pelaksana dan aturan yang harus menjadi pedoman. Kebijakan pinjam pakai kawasan hutan belum mampu menjamin berkurangnya konflik sehingga perlu percepatan pengukuhan kawasan hutan dan penggunaan satu peta acuan sebagai salah satu solusi. Kata kunci : pertambangan dan kehutanan, tumpang tindih kawasan hutan, pinjam pakai kawasan hutan

Kontestasi Aktor dalam Proses Revisi Rencana Tata Ruang Provinsi (RTRWP) di Indonesia (Studi Kasus: Revisi RTRW Provinsi Riau) Suprapto Suprapto; San Afri Awang; Ahmad Maryudi; Wahyu Wardhana
Jurnal Wilayah dan Lingkungan Vol 6, No 3 (2018): December 2018
Publisher : Department of Urban and Regional Planning, Diponegoro University

Riau Province is one of the provinces which have not revised the RTRWP until 2017. One possible cause relates to the conflicts of interest among the participating actors. Each actor exercises the power influences to secure individual interests. This study aims to identify the participating actors, to measure the power influences exchanged between the actors and to recommend solutions for resolving the Riau’s RTRWP revision issue. The method used is Actor-Centered Power (ACP) approach, which is supported by Content Analysis of Riau's RTRWP document and related regulations. The research findings show that there are at least nine actors involved in the revision process of the Riau’s RTRWP, where the role of the Ministry of Environment and Forestry is the most powerful then followed by the Riau Province Government. The research also shows the involvement of Ombudsman Agency, private corporations, and non-governmental organization (NGO) in the Riau’s RTRWP revision process. To accelerate the completion of the Riau’s RTRWP Regional Regulation Draft, coordination and integration between the participating actors are required as well as the law enforcement against legal violations and comprehensive conflict management.

Locals’ Claims of Rights and Access to Forest Resources in Three Forest Management Regimes in Gunungkidul Regency, Yogyakarta Muhammad Iqbal Nur Madjid; Dwiko Budi Permadi; Wahyu Wardhana; Ratih Madya Septiana
Jurnal Wasian Vol 9, No 1 (2022): 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.v9i1.7043

One of state forest areas managed by three management regimes is Bunder forest area, Gunungkidul, Yogyakarta. Three management regimes are the production forest of KPH Yogyakarta, the conservation forest of Tahura, and the educational forest of KHDTK Wanagama I. The differences of management regimes are thought to affect the actual interaction pattern of villagers with the forest. This research aims to compare the actual rights and access of villagers to Bunder forest area in three management regimes in the hope of finding more effective forest management patterns. This research used a qualitative approach through the case study method of the interaction villagers of Bunder, Banaran, Ngleri, and Gading villages with the surrounding forests. The results show that forest management regimes affects the way villagers can access the forests. The aggregate value of the actual rights received by the villagers to the production forest of KPH Yogyakarta is higher than the educational forest of KHDTK Wanagama I. The lowest is management regimes in conservation forest of Tahura. Based on the access mechanisms that empower villagers, the educational forest regime of KHDTK Wanagama I is higher than the production forest regime of KPH Yogyakarta and the conservation forest regime of Tahura. This research recommends defining rights and access to increase certainty about the benefits of forest resources.Keywords: rights, access, production forest, Forest park, educational forest

Mapping of Teak (Tectona grandis) Growing Stock Volume based on Sentinel-2 Imagery Classification Bekti Larasati
Jurnal Sylva Scienteae Vol 5, No 3 (2022): Jurnal Sylva Scienteae Vol 5 No 3 Edisi Juni 2022
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jss.v5i3.5140

Remote sensing utilization for plantation forests management in Java was not yet widely used, whereas the ability of remote sensing data for land cover monitoring and forest resource mapping has been developed, ranging from low resolution imagery for global areas to moderate and high resolution for small scale areas. Data availability and human resources often become obstacles in the application. The emergence of Sentinel satellite images becomes an alternative because the dataset is free access and has moderate spatial resolution and high temporal resolution. This study aims to map the growing stock volume in UGM Educational and Training Forest using Sentinel-2 imagery. Three kinds of classification method based on machine learning algorithms i.e. Random Forest, K-NN and SVM were compared for land cover classification. An NDVI algorithm was also used for mapping the spectral value distribution. Moreover, a stand age distribution which obtained from KHDTK UGM manager were also map. A stand classification map based on land cover types, NDVI value and stand age distribution was created as a basis of growing stock volume estimation. The analysis show that the growing stock volume can be estimated using these method with RMSE 177,8 m3 and MAPE 21,9 m3.

Locals’ Claims of Rights and Access to Forest Resources in Three Forest Management Regimes in Gunungkidul Regency, Yogyakarta Muhammad Iqbal Nur Madjid; Dwiko Budi Permadi; Wahyu Wardhana; Ratih Madya Septiana
Jurnal Wasian Vol 9, No 1 (2022): Jurnal Wasian
Publisher : Balai Penerapan Standar Instrumen Lingkungan Hidup dan Kehutanan (BPPLHK)Manado

One of state forest areas managed by three management regimes is Bunder forest area, Gunungkidul, Yogyakarta. Three management regimes are the production forest of KPH Yogyakarta, the conservation forest of Tahura, and the educational forest of KHDTK Wanagama I. The differences of management regimes are thought to affect the actual interaction pattern of villagers with the forest. This research aims to compare the actual rights and access of villagers to Bunder forest area in three management regimes in the hope of finding more effective forest management patterns. This research used a qualitative approach through the case study method of the interaction villagers of Bunder, Banaran, Ngleri, and Gading villages with the surrounding forests. The results show that forest management regimes affects the way villagers can access the forests. The aggregate value of the actual rights received by the villagers to the production forest of KPH Yogyakarta is higher than the educational forest of KHDTK Wanagama I. The lowest is management regimes in conservation forest of Tahura. Based on the access mechanisms that empower villagers, the educational forest regime of KHDTK Wanagama I is higher than the production forest regime of KPH Yogyakarta and the conservation forest regime of Tahura. This research recommends defining rights and access to increase certainty about the benefits of forest resources.Keywords: rights, access, production forest, Forest park, educational forest

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