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The Species Diversity and Structure of The Limited Production Forest in Arui Watershed of Manokwari District of West Papua, Indonesia Mahmud, Mahmud; Kusumandari, Ambar; Sudarmadji, Sudarmadji; Supriyatno, Nunuk
Biosaintifika: Journal of Biology & Biology Education Vol 11, No 2 (2019): August 2019
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v11i2.16340

The detailed causal factors of flood have not been established, whether because of the damage of upper watershed, sedimentation resulting in shallow river, forest conversion, the decrease in abundance and structure or high rainfall. The study aimed at finding out the species diversity and structure of the limited production forest (LPF) from the seedling to the tree stage of Arui watershed in Manokwari district. The species diversity was determined based on Shannon-Wiener index, while vegetation structure was determined based on Importance Value Index. There were totally 92 plots of samples drawn using systematic sampling. The results of vegetation analysis showed that there were 174 species of 43 families with the species diversity of 1.5-1.8 that was categorized as moderate. The four dominant species that were always found in seedling, sapling, pole and tree stages included: Pometia pinnata, Teijsmanniodendron bogoriense, Chisocheton ceramicus, and Horsfieldia irya. The conversion of the LPF into non-forestry sector for the purpose of accelerating development must be reviewed by considering hydrology, land, biodiversity, and social and regional aspects in order to prevent and to reduce flood in the coming days.

Evaluation of Annual Allowable Cut (AAC) Determination of Teak Forest Plantations in Perum Perhutani, Indonesia Rohman Rohman; Sofyan P Warsito; Nunuk Supriyatno; Ris Hadi Purwanto; Catur Atmaji
Jurnal Manajemen Hutan Tropika Vol. 20 No. 3 (2014)
Publisher : Institut Pertanian Bogor (IPB University)

The degradation of teak forest plantations in Java that are managed by Perum Perhutani (PP) continues to happen, and this is caused by some risk factors such as illegal logging, grazing, forest fire, and encroachment. However, these risk factors have not been considered by PP notably in annual allowable cut (AAC) determination of yield regulation. Therefore, the AAC value could be overestimated. The research was aimed at evaluating the method of AAC determination and proposing an alternative method that considers the risk factors. This research was conducted with a series of data analysis approach from the data on five planning periods. The research result showed that forest damage occurs in varied situations. On average, the rate of deforestation accounted for 0.8% per annum. The calculation of AAC by considering the rate of damage risk in normal condition approximately made up 70.8%. Thus, compared to another method without considering damage risk rate, overestimation constituted 29.2%. In brief, this had an impact on the decline of timber stock.

Preliminary Stand Table for Average Dominant Trees of Jati Plus Perhutani in Saradan, Madiun, and Ngawi Forest Districs Rissa Rahmadwiati; Ronggo Sadono; Nunuk Supriyatno
Jurnal Manajemen Hutan Tropika Vol. 22 No. 1 (2016)
Publisher : Institut Pertanian Bogor (IPB University)

In order to realize sustainable teak forest management, the strategic plan of forest management is highly needed to establish the growth characteristics model of Jati Plus Perhutani (JPP). The most thing which cannot be ignored to estimate the growth and yield of teak is quantification of site quality differentiation. The objective of this study is to arrange and predict the properly yielded table of the average dominant trees of JPP in the forest management unit of Saradan, Madiun, and Ngawi. The trees sampling had been selected for the age of 6 to 12 years from the best compartment areas in JPP. Growth model and JPP's yield stands were predicted using growth parameters such as diameter (dbh), total height, clear bole height, volume, and growing space. Each parameter was analyzed using SPSS 20 statistical software to determine the best growth model that will then be used to predict the stand table parameters values. The equation was selected from the highest R2 value or the value which is approaching to 1, with low standard error estimation (SEE). The result shows that best equation model to estimate the growth from tree parameters on medium site of JPP are dominated by S model and the best model for bole height is growth model. The data were taken from an initial observation as a preliminary study, further research is expected to enhance the results of current research to obtain the stand table which can be applied in the future.

Socio Demographic Factors and Work Performance of Forest Workers in Cajuput Leaf Harvesting at RPH Nglipar, KPH Yogyakarta Ratih Madya Septiana; Nunuk Supriyatno; Slamet Riyanto
Jurnal Wasian Vol 7, No 2 (2020): 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.v7i2.5532

Cajuput leaf harvesting is a technical forest activity of non-timber forest products. The productivity of cajuput leaf harvesting is strongly influenced by aspects of human resource capacity and biophysical aspects. This study aims to identify the socio-demographic conditions of forest workers in cajuput leaves harvesting and to analyze the standards performance of harvesting in FMU Yogyakarta. A survey of 100 samples of workers were used to determine socio-demographic characteristics, while in-depth observations were made on 3 workers with different characteristics to determine work performance. The socio-demographic conditions of workers in the cajuput leaf harvesting are seen from eight characteristics, namely age, gender, education, number of dependents, livelihoods, and land ownership. Workers have an average age of 58 years old and are male. The level of education possessed by workers is dominated by graduating from elementary school (SD) by 64 %. The average number of dependents per worker household is 4 people, with the main livelihood being farmers. The average land ownership of workers in cajuput leaf harvesting is 0.17 ha. The work performance of harvesting for normal people in the FMU Yogyakarta is 72.23 kg / hour.

Conservation Design and Scenario for Flood Mitigation on Arui Watershed, Indonesia Mahmud Mahmud; Ambar Kusumandari; Sudarmadji Sudarmadji; Nunuk Supriyatno
Indonesian Journal of Geography Vol 51, No 3 (2019): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Flooding has been natural disaster in Indonesia and elsewhere. This research is designed to create scenarios and designs conservation to mitigate flooding disaster. Data potential ,vulnerability, and duplicated river covering 0.25% of the targeted flooding area were collected and analysed. Five disain of conservation, natural river as control, river normalization, normalization with gabion stone, river straigtening, and straigtening with gabion stone, are proposed, and main targeted responses of these five scenarios are river current velocity. Effectiveness scenarios were analysed using Anova and Tukey test. The results showed that alignment with gabion stone was the most effective scenario for flooding mitigation since this was the most effective in increasing river current velocity. This could prevent riverbank occurrence of avalanche, accelerate river current, overcome flooding, and prevent future flooding. Other scenarios likes dead clicth ended-hallway, canalization, and riparian reclamation are also possible implemented.

Pemanfaatan Limbah Biomassa Sawit Ramah Lingkungan Denny Irawati; Ganis Lukmandaru; Joko Sulistyo; Sigit Sunarta; Tomy Listyanto; Jaka Widada; Nunuk Supriyatno; Yose Rizal
Jurnal Pengabdian kepada Masyarakat (Indonesian Journal of Community Engagement) Vol 6, No 4 (2020): Desember
Publisher : Direktorat Pengabdian kepada Masyarakat Universitas Gadjah Mada

Dalam rangka memenuhi kebutuhan lahan untuk pembangunan perumahan karyawan, PT Semen Baturaja Tbk. (PTSB) membuka kurang lebih 27 hektar lahan yang di dalamnya diperkirakan terdapat kurang lebih 2700 batang tanaman kelapa sawit yang kurang produktif. Pembukaan lahan tersebut akan menghasilkan biomassa sawit yang cukup besar. Salah satu usaha pemanfaatan limbah biomassa sawit adalah dengan mengolahnya menjadikompos. Kompos dapat digunakan untuk rehabilitasi lahan bekas tambang oleh PTSB. Hingga saat ini, PTSB belum memiliki pengalaman di bidang pembuatan kompos. Oleh karena itu, PTSB bekerja sama dengan Fakultas Kehutanan, Universitas Gadjah Mada untuk memproduksi pupuk kompos dari limbah biomassa tanaman sawit. Metode yang digunakan pada kegiatan pengabdian ini adalah sosialisasi, pembuatan kompos secara partisipatif, dan pendampingan di lapangan. Luaran dari kegiatan ini berupa kompos limbah biomassa sawit serta pengetahuan mengenai teknologi proses pembuatan kompos bagi pihak PTSB.Jumlah pupuk kompos yang bisa diperoleh dari delapan gundukan daun kelapa sawit adalah 248,9 ton dan dari batang kelapa sawit sebanyak 1.236,6 ton. Pupuk kompos setelah pengomposan selama dua bulan mempunyai rasio C/N 13,7. Biaya yang dikeluarkan untuk pengomposan adalah Rp591.405.000,00 dengan potensi keuntungan sebesar Rp6.093.232.500,00. Pengetahuan perihal pembuatan kompos berdampak pada penghematan pengeluaran PTSB untuk membeli pupuk guna rehabilitasi lahan serta penanganan permasalahan limbah biomassa.

UNIVERSUM KELEMBAGAAN KESATUAN PENGELOLAAN HUTAN PRODUKSI (KPHP) MODEL KABUPATEN BANJAR PROVINSI KALIMANTAN SELATAN Ridwan Syaâ€™rani; San Afri Awang; Nunuk Supriyatno; Ris Hadi Purwanto
JURNAL HUTAN PULAU-PULAU KECIL Vol 1 No 2 (2016): JHPPK
Publisher : Program Studi Manajemen Hutan, Pascasarjana Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1429.837 KB)

This study aims to examine the relationship between the factors that forming the institutions in Production Forest Management Unit (KPHP) Model Banjar Regency, South Kalimantan Province. The analysis used is Structural Equation Model (SEM). SEM is a multivariate analysis were used to analyze the relationship between variables. The sampling technique was conducted using purposive sampling method with 83 respondents. Based on the results of the study showed that the institutionality is signiï€cantly inï€‚uenced by the factors of human resources, institutional variables and linkage.

Evaluasi Produktivitas Kayu dalam Pengelolaan Hutan Rakyat Lestari Skema Forest Stewardship Council di Jawa Timur Hermudananto; Nunuk Supriyatno
Jurnal Silva Tropika Vol. 3 No. 2 (2019): Jurnal Silva Tropika
Publisher : Fakultas Kehutanan Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jsilvtrop.v3i2.8038

Certified sustainable community forests in Indonesia continue to grow in number for the Forest Stewardship Council (FSC) scheme. At least three aspects have been fulfilled namely, sustainable production, protected ecosystems, and social contribution. However, the problem of 'need cutting' in community forests has the potential to hamper forest management in terms of timber harvesting. Three FSC certified community forest management units in East Java, Enggal Mulyo, KSU KAM KTI, KSU Bromo Mandiri KTI, demonstrated this challenge through evaluating the log harvest records, discussions with managers and farmers, and field observations. Harvesting plans are only based on periodic tree inventory data that does not take into account the farmers' harvest needs, such as weddings or celebrations. Therefore, all annual timber production targets cannot be achieved, indicating that need harvesting and delayed logging are also still visible in internationally certified sustainable forest management. Support from managers and parties is still needed so that the management plan can be implemented properly. The owner of the FSC scheme also needs to evaluate their standard requirements for implementing timber harvesting on a more realistic scale of community forests.

Socio Demographic Factors and Work Performance of Forest Workers in Cajuput Leaf Harvesting at RPH Nglipar, KPH Yogyakarta Ratih Madya Septiana; Nunuk Supriyatno; Slamet Riyanto
Jurnal Wasian Vol 7, No 2 (2020): Jurnal Wasian
Publisher : Balai Penerapan Standar Instrumen Lingkungan Hidup dan Kehutanan (BPPLHK)Manado

Cajuput leaf harvesting is a technical forest activity of non-timber forest products. The productivity of cajuput leaf harvesting is strongly influenced by aspects of human resource capacity and biophysical aspects. This study aims to identify the socio-demographic conditions of forest workers in cajuput leaves harvesting and to analyze the standards performance of harvesting in FMU Yogyakarta. A survey of 100 samples of workers were used to determine socio-demographic characteristics, while in-depth observations were made on 3 workers with different characteristics to determine work performance. The socio-demographic conditions of workers in the cajuput leaf harvesting are seen from eight characteristics, namely age, gender, education, number of dependents, livelihoods, and land ownership. Workers have an average age of 58 years old and are male. The level of education possessed by workers is dominated by graduating from elementary school (SD) by 64 %. The average number of dependents per worker household is 4 people, with the main livelihood being farmers. The average land ownership of workers in cajuput leaf harvesting is 0.17 ha. The work performance of harvesting for normal people in the FMU Yogyakarta is 72.23 kg / hour.

Normalitas Tegakan Berbasis Resiko untuk Pengaturan Kelestarian Hasil Hutan Tanaman Jati di Perum Perhutani Rohman Rohman; Sofyan P Warsito; Ris Hadi Purwanto; Nunuk Supriyatno
Jurnal Ilmu Kehutanan Vol 7, No 2 (2013)
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Hutan tanaman jati yang dikelola oleh Perum Perhutani, dalam berbagai keadaan termasuk kondisi yang relatif aman, selalu memiliki resiko kerusakan yang menyebabkan menurunnya kualitas kelas hutan produktif ke arah tidak produktif. Penelitian ini bertujuan untuk mengetahui standar kenormalan hutan tanaman jati yang mempertimbangkan resiko kerusakan sebagai dasar pengaturan kelestarian hasil. Penelitian ini dilaksanakan di KPH Randublatung Perum Perhutani Divisi Regional Jawa Tengah. Resiko kerusakan (casualty per cent) didekati dari angka kerusakan tegakan berdasarkan data seri selama 4 jangka perencanaan mulai jangka 1983/1992 sampai jangka 2013/2022. Normalitas tegakan didekati dari luas tegakan yang harus dibangun, sedemikian sehingga diperoleh hasil tahunan yang realtif sama dengan mempertimbangkan casualty per cent. Hasil penelitian menunjukkan bahwa luas hutan normal ideal tanpa mempertimbangkan resiko kerusakan di KPH Randublatung dengan luas untuk produksi 27.359,4 ha dan daur 60 tahun adalah sebesar 456,0 ha per tahun. Dengan mempertimbangkan casualty per cent, luas hutan normal berbasis resiko di KPH Randublatung sebesar 229,5 ha per tahun atau 50,3% dari luas normal ideal. Untuk memperoleh hasil tahunan yang realtif sama seluas 229,5 ha, struktur luas hutan yang harus dibangun mulai KU I, KU II, KU III, KU IV, KU V, dan KU VI berturut-turut sebesar 6.875 ha; 5.784 ha; 4.711 ha; 3.997 ha; 3.232 ha dan 2.761 ha.Katakunci: casualty per cent, hutan normal, Perum Perhutani, hutan tanaman jati Risks-based Stand Normality for Sustainable Yield Forest Plantation in Perum PerhutaniAbstractIn any situation, either secure or insecure, teak forest plantations encounter high risks due to ecological and social disturbances, causing degradation and decrease their normality in terms of areas and standing stock. This research aimed to determine the normality standard of teak forest plantations under risks as a basis for better sustained yield regulation. This research was conducted in forest management unit (FMU) of Randublatung, state-owned forest company (Perhutani), located at Central Java. The risk of forest damages, called casualty per cent, was calculated using a series of age class structures based on a 10-year periodic forest inventory for four sequential planning periods:1983/1992, 1993/2002, 2003/2012,to 2013/2022. The normal forest was determined based on the stands area basis, which was defined based on the final cutting area that already incorporates casualty per cent, in such a way that each year the newly planted forests areas have relatively the same number. The results showed that without casualty per cent, the normal forest built every year in FMU Randublatung was 456 ha/year for a 60-year rotation cycle. However, by incorporating the damage risks (casualty per cent), the normal forest area in KPH Randublatung should be built only 229.5 ha/year or just 50.3% of the current planning. Furthermore, in order to obtain this annual harvesting, the normal forests should have age classes structures from age class I, II, III, IV, V, and VI, in such a way that their areas equal to 6,875 ha, 5,784 ha, 4,711 ha, 3,997 ha, 3,232 ha, and 2,761 ha, respectively.

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