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All Journal JURNAL HUTAN LESTARI Agrienvi : Jurnal Ilmu Pertanian Jurnal Hutan Tropika Jurnal Wana Tropika Flora: Jurnal Kajian Ilmu Pertanian dan Perkebunan Jurnal Wana Tropika
Suhartati, Tatik
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Agriculture, Biological Sciences & Forestry Environmental Science

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PERTUMBUHAN JATI PADA JARAK TANAM YANG BERBEDA Suhartati, Tatik
Jurnal Wana Tropika Vol 4 No 2 (2014)
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

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TAKSIRAN UMUR OPTIMAL PRODUKSI DAUN KAYU PUTIH Suhartati, Tatik; Raharjo, Hedy
Jurnal Wana Tropika Vol 8 No 2 (2018)
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

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Pengelolaan hutan produksi selalu harus memperhatikan pengaturan hasil yang tepat. Pengaturan hasil yang tepat akan dapat menjamin kelestarian hasil hutan. Agar dapat dilakukan perencanaan pengaturan hasil dengan tepat, maka diperlukan pengetahuan tentang kemampuan tumbuh hutan tersebut. Demikian juga hutan untuk produksi daun kayu putih. Penelitian ini akan mencari model prediksi pertumbuhan daun kayu putih dan menentukan umur optimal produksi daun. Data dikumpulkan dengan mengambil 140 sampel pohon model yang dipilih secara purposive pada empat macam umur yaitu 5, 10, 15 dan 36 tahun. Variabel bebas yang dilibatkan dalam model adalah umur. Terdapat lima model non linear yang dianalisis untuk dipilih yang terbaik. Penilaian ketepatan model menggunakan uji F, t, R2, SeR dan validasi model menggunakan bias, SA dan SR. Penelitian ini mendapatka bahwa model prediksi produksi daun kayu putih yang terbaik adalah Ln Produksi daun = -1,286 + 2,081 ln Umur – 0,356 (ln Umur)2 dan umur optimal yang merupakan umur saatnya tanaman diremajakan adalah 19 tahun. Kata kunci : produksi daun kayu putih, model prediksi, umur optimal
MODEL PERTUMBUHAN POHON JATI (Tectona grandis L.f.) DI KPHP BATULANTEH, SUMBAWA, NTB Woesono, Hastanto Bowo; Suhartati, Tatik; Pujasa, Dwita
Jurnal Wana Tropika Vol 9 No 1 (2019)
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

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Teak is a high value wood. The tree trunk has a high economic value because it provides multipurpose wood products. Tree trunks have distinctive biometric characteristics, including teak trunks. The biometric characteristic of a tree species is a problem in the science of forest planning, because the growth of tree trunks is influenced by many factors, including differences in age, location and site. This research will be arranged biometric model of teak tree that grows in Batulanteh Forest Management Unit, beginning with collecting physical data of tree through measurement of tree dimension. This study uses 75 sample trees grown in the Batulanteh Forest Management Unit area. The data used were tested outlier with boxplot method and calculated ratio and correlation. The regression equation was done by using SPSS version 23 program. Different ratios between tree dimensions at different ages were tested using complete randomized design. The results of this study indicate that the growth model of base diameter, diameter at breast height, and total height are characteristic of trees that are highly correlated with other tree biometrics characteristics. So in the management of teak forests Batulanteh Forest Management Unit can make these three characteristics as a reference in looking at the characteristics of other trees. The results also show the ratio Dp / Dbh, Tt / Dbh still fluctuate throughout the age of 10 to 22 years. Keywords : Teak, growth model, inter-dimensional ratio, age
DAUR VOLUME OPTIMAL JATI DI HUTAN RAKYAT (STUDI KASUS DI DESA GIRIKARTO, KECAMATAN PANGGANG, KABUPATEN GUNUNG KIDUL Suhartati, Tatik; Pebriansyah
Jurnal Wana Tropika Vol 11 No 2 (2021): November
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55180/jwt.v11i2.179

Abstract

The aim of this research is to define rotation of optimal volume production of teak private smallholder forest. Sample of trees were taken by using purposive sampling method in cutting activity area. Seventy trees have choosen by diameter distribution, healthy and straigh stem. Every sample trees were measured with stem analysis method. Rotation of maximum volume production define by growth curve, mean annual increament (MAI) and current annual increament (CAI) curve. The result show that height youth stage begin 2 until 6 year, diameter youth stage begin 3 until 10 year, volume youth stage begin 4 until 25 year and rotation of maximum volume production is 25 year. Key words: Rotation of optimal volume production, Stem analysis, Growth curve
Model Pertumbuhan Tinggi dan Diameter Eucalyptus sp. Suhartati, Tatik; Wahyudiono, Sugeng; Sari, Atika Kumala
Jurnal Wana Tropika Vol 14 No 1 (2024): Mei
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55180/jwt.v14i1.202

Abstract

Growth models can provide information on how the tree grows with age, and can be used to predict the level of timber production. This study aims to find the growth model of height (H) and diameter (Dbh) and determine the maximum volume cycle of Eucalyptus sp. in PT. XYZ. Samples were taken in various compartments with ages of 18 months, 30 months 42 months and 54 months. The total sample of 64 plots was divided into 48 plots for model development and 16 plots for model validation. The four types of models analyzed were Linear, Logarithmic, Inverse and S models. Modeling was done through regression analysis. Model acceptance criteria were significant in F test, R2 value and SeR, while model validation criteria used RMSE, SR, SA and Bias values. The best growth model in this study for both Height and Dbh was the S model with the equations Height=e^(3.0355 - 1.3525/x) and DBH=e^(2.6491 - 1.2843/x). The maximum volume cycle was achieved at the age of 4.5 years with a volume of 172.7284 m3/ha and a Mean Annual Increament (MAI) value of 38.3841 m3/ha/year.
Pematahan Dormansi Benih Gmelia arborea Roxb. Menggunakan Asam Sulfat (H2SO4) Suhartati, Tatik; Taat Andayani, Surodjo; Wahyudiono, Sugeng
Jurnal Wana Tropika Vol 12 No 1 (2022): Mei
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55180/jwt.v12i1.213

Abstract

Gmelina (Gmelina arborea Roxb.) seed is a type of seed that have physical dormancy. This is because water and gases prevent by the hard seed coat during the germination process. Therefore, to break dormancy, preliminary treatment in the form of scarification is required, including using sulfuric acid (H2SO4) solution. This study aims to determine the treatment of soaking in a 96% concentration of H2SO4 solution that produces the best germination ability. The study used a completely randomized design method (CRD) with 5 soaked time treatments, namely control (0 minutes), 5 minutes, 10 minutes, 15 minutes, 20 minutes and each treatment was repeated 3 times with 50 seeds for each replication. The results showed that soaked the seeds in the 96% concentration of H2SO4 solution had a significant effect on on initial time of germination, last time of germination, 80% limit time for germination, percentage of germination and vigor index. Soaking time for 10 minutes is the best treatment for scarification of gmelina seeds.   Keywords: physical dormancy; pre-treatment; scarification; soaking time
Distribusi Diameter Jati dan Mahoni di Hutan Rakyat Desa Semoyo Kecamatan Patuk Kabupaten Gunungkidul Suhartati, Tatik; Purwadi; Saputra, Evan
Jurnal Wana Tropika Vol 12 No 2 (2022): November
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55180/jwt.v12i02.319

Abstract

Community forests in Gunungkidul have developed for a long time and are managed in a traditional way, known as pekarangan, moor and wono. Most of the community forest planting patterns found in Semoyo Village are agroforestry patterns, where trees are planted with a mix of various tree species and one type is dominated, for example teak or mahogany. This study aims to determine the differences in the shape of the diameter distribution of mahogany and teak in dry fields and yards which are dominated by one tree species. The method used is quantitative analysis to produce diameter distribution and draw a curve to describe the stand structure. The results showed that for the type of mahogany in the yard and moor in all class diameters, the number of trees was higher than teak. The diameter distribution of mahogany and teak both in the yard and dry land both showed a shape that resembled an inverted J and was successfully modeled using the exponential model.
Pemodelan Hubungan Tinggi dan Diameter Eucalyptus pellita Umur 30 Bulan Suhartati, Tatik; Wahyudiono, Sugeng; Purwadi; Michael
Jurnal Wana Tropika Vol 13 No 1 (2023): Mei
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55180/jwt.v13i1.596

Abstract

Inventory on Plantation Monitoring Assessment (PMA) Eucalyptus pellita at the aged of 30 months, measuring total height (h) and diameter at breast height (dbh). Height measurements were done using the Vertex. Measuring the total height of a tree whose crown has started to close (overlap)  requires more time to find the highest point of the tree, it is necessary to overcome it with a tool that is a height estimator model through the relationship between height and diameter at breast height (h-dbh). The study was conducted using two compartments of Eucalyptus pellita stands at the aged of 30 months. Sampling conducted by Systematic Sampling with Random Start. The data measured were total height (h) and diameter at breast height (dbh). Simple linear regression modeling h-dbh compiled for each compartment then carried out a goodness of fit test and validation using the Bias, SA and SR values, after that the regression line similarity was tested. The results showed that the two compartments have regression equations with the same slope and intercept, so that the two compartments can be threated as one dataset and the total height in the two compartments studied can be estimated using the equation h = 6,968 + 0,844 dbh.
Pemantauan Jumlah Batang Eucalyptus pellita Umur 6 Bulan Berdasarkan Hasil Foto Drone Wahyudiono, Sugeng; Suhartati, Tatik; Yudi
Jurnal Wana Tropika Vol 13 No 2 (2023): November
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55180/jwt.v13i2.966

Abstract

The use of unmanned aircraft (UAV) or drones, apart from being used for mapping, can be a solution for quickly obtaining information and carrying out forest inventories with very detailed resolution results. Plantation Monitoring Assessment (PMA) aged 6 months is an initial inventory activity, later the data from PMA 6 will be the basic data for subsequent PMA. So, with drones, it is hoped that satisfactory results will be obtained. Apart from that, drones can be used to count the number of live and dead trees as well as empty spots. This research aims to compare the results of tree calculations directly in the field with the results of drone photos. This research was carried out on 6 month old Eucalyptus pellita plants in compartment A034, Baserah Sector, PT. RAPP. Data collection was carried out using systematic random sampling with a sampling intensity of 1%. The data taken is in the form of data on the number of live and dead/empty plants in the field and photographed with a drone. The test was carried out to test the differences in the number of dead/empty plants directly in the field and calculations using drone photos, namely the t test. The results showed that there was no difference between the number of live and dead/empty plants in the field and from drone photos.
Analisis Perubahan Kerapatan Vegetasi Penutup Lahan dengan Metode Indeks Vegetasi NDVI (Studi Kasus di Kawasan Hutan Rakyat Kabupaten Gunung Kidul) Husni, Muhamad Fakhri; Wahyudiono, Sugeng; Suhartati, Tatik
Jurnal Wana Tropika Vol 14 No 2 (2024): November
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55180/jwt.v14i2.1651

Abstract

This study aims to analyze changes in vegetation density in Gunungkidul Regency using the NDVI (Normalized Difference Vegetation Index) method based on Landsat 8 satellite imagery. The research focuses on evaluating the condition of teak forest vegetation density in Gunungkidul Regency in 2013 and 2023, with the goal of identifying land cover changes and providing an overview of the forest ecosystem conditions in the area. The methods used in this research include processing satellite imagery with spatial analysis techniques using GIS (Geographic Information System) software. NDVI data was analyzed to measure vegetation density for both time periods, classifying land cover into several categories: non-vegetated land, very low vegetation, low vegetation, and moderate vegetation. The analysis results were compared to identify trends in changes over the ten-year period. The findings indicate that there has been a change in vegetation density in Gunungkidul Regency, with a decrease in the area of low vegetation from 126,747.87 hectares in 2013 to 118,972.88 hectares in 2023 (6,13%). An increase in non-vegetated land was also recorded, rising from 513.47 hectares to 1,107.76 hectares during the same period (113,24%). Although there were some improvements in vegetation density, the increase in non-vegetated land indicates challenges in land management in the region.
Co-Authors Afiantoro, Febri evan saputra, evan Husni, Muhamad Fakhri Kifli, Fahmi W. Kusumaningsih, Karti Rahayu Mahdi, Muhammad Alwan Maystang, Jeffry Michael Pebriansyah Pujasa, Dwita Purwadi Purwadi Purwadi Putriyani, Marsella Raharjo, Hedy Ranali, Jabir Imron Ris Hadi Purwanto Sari, Atika Kumala Setyarso, Agus Sigiro, Elyas Frankly Gregorius Sugeng Wahyudiono, Sugeng Sumardi . Taat Andayani, Surodjo Woesono, Hastanto Bowo Yudi