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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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Variasi Kerapatan Semai terhadap Pertumbuhan Suhartati, Tatik
Jurnal Wana Tropika Vol 3 No 2 (2013)
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

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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

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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
POTENSI SERAPAN CARBON JATI UNGGUL NUSANTARA PADA VARIASI PERSAMAN PENAKSIR DAN UMUR Suhartati, Tatik; Wahyudiono, Sugeng; Mahdi, Muhammad Alwan; Purwadi, Purwadi
JURNAL HUTAN LESTARI Vol 11, No 4 (2023): JURNAL HUTAN LESTARI
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jhl.v11i4.72036

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Forest plantations have a potential role in reducing carbon emissions. Forest plantations serve a dual role of wood production and ecological restoration, which has a significant impact on the global carbon cycle. Planting, maintenance, and harvesting in forest plantations lead to dynamic changes in carbon storage. Estimating the carbon stock can determine emissions released into the atmosphere when there is a change in land cover. This study aims to determine the biomass, carbon stock, and CO2 sequestration of Jati Unggul Nusantara (JUN) stands at the ages of 3, 5, and 7 years in BDH Paliyan. Sampling was conducted using systematic sampling with random start. Five plots were selected to represent each age. Total height (h) and diameter at breast height (dbh) were measured for all trees in the plots. Biomass estimation was done using allometric equations with three variations of predictor variables: dbh alone, dbh and tree height, and Biomass Expansion Factor (BEF). The CO2 sequestration potential of JUN at 3 years of age ranged from 15,17 to 20,.38 tons CO2 eq./ha, at 5 years of age, it ranged from 54,98 to 65,02 tons CO2 eq./ha, and at 7 years of age, it ranged from 179,42 to 204,72 tons CO2 eq./ha. For 3 years of age, the biomass estimation equation that uses dbh alone and the BEF method can be used to estimate biomass, while for 5 and 7 years of age, all three equations can be used for biomass estimation.Keywords: Jati Unggul Nusantara, Biomass, Carbon sequestrationAbstrakHutan tanaman memiliki peran potensial dalam mengurangi emisi carbon. Hutan tanaman memiliki peran ganda yaitu produksi kayu dan restorasi ekologi yang berdampak penting terhadap siklus carbon global. Penanaman, pemeliharaan dan diikuti pemanenan pada hutan tanaman berakibat pada perubahan simpanan carbon yang dinamis. Penaksiran stok karbon yang tersimpan dapat menentukan emisi yang dilepaskan ke atmosfer saat terjadi perubahan tutupan lahan. Penelitian bertujuan untuk mengetahui biomasa, cadangan carbon, dan jumlah serapan CO2 tegakan Jati Unggul Nusantara (JUN) umur 3, 5 dan 7 tahun di BDH Paliyan.  Pengambilan sampel dilakukan dengan metode systematic sampling with random start. Sejumlah 5 plot diambil pada petak yang mewakili masing-masing umur. Tinggi total dan diameter setinggi dada diukur pada semua pohon dalam plot. Penaksiran biomasa menggunakan persamaan alometrik dengan 3 variasi variabel penaksir yaitu diameter setinggi dada (dbh) saja; diameter setinggi dada dan tinggi pohon (dbh dan tinggi); dan Biomass Expantion Factor (BEF). Potensi serapan CO2 JUN umur 3 tahun antara 15,17 - 20,38 ton CO2 eq./ha,  pada umur 5 tahun 54,98 antara 60,71-65,02 ton CO2 eq. /ha dan umur 7 tahun antara  179,42-204,72 ton CO2 eq. /ha.  Pada umur 3 tahun persamaan yang hanya menggunakan dbh saja dan metode BEF dapat dipergunakan menaksir biomasa, sedangkan pada umur 5 dan 7 tahun ketiga persamaan dapat dipergunakan untuk menaksir biomasa.Kata kunci: Jati Unggul Nusantara, Biomasa, Serapan Carbon. 
PRODUKSI SERASAH DAUN PADA DUA JENIS MANGROVE DI PANTAI BAROS KABUPATEN BANTUL Suhartati, Tatik; Putriyani, Marsella; Kusumaningsih, Karti Rahayu; Purwadi, Purwadi
Agrienvi: Jurnal Ilmu Pertanian Vol. 18 No. 2 (2024): Desember 2024: Journal Agrienvi
Publisher : Agrienvi: Jurnal Ilmu Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/aev.v18i2.18556

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Produksi serasah mangrove berperan penting dalam menyediakan nutrisi esensial bagi lingkungan perairan di sekitarnya, karena memfasilitasi perpindahan bahan organik ke tanah. Produksi serasah merupakan ukuran produktivitas sebagai kontribusi terhadap sistem muara. Hutan Mangrove Baros merupakan kawasan konservasi di sepanjang pesisir pantai Baros dan muara Sungai Opak, yang memiliki keanekaragaman flora dan fauna. Jenis vegetasi yang dominan di sini adalah Avicennia dan Rhizophora. Penelitian ini bertujuan mengetahui produksi serasah jenis mangrove di Pantai Baros. Penelitian dilakukan dengan meletakkan 3 petak ukur pada ke dua  jenis mangrove. Kerapatan pohon setiap petak diukur dan selanjutnya dipasang 3 buah litter trap pada masing-masing  petak ukur yang diletakkan secara purposive. Pengambilan serasah daun mangrove dilakukan setiap 7 hari sekali selama 28 hari. Serasah basah dimasukkan ke dalam plastik  untuk  ditimbang, kemudian dioven pada suhu 85º C sampai beratnya konstan, untuk memperoleh berat keringnya. Pengujian untuk mengetahui perbedaan berat kering serasah daun antar kerapatan  menggunaan uji-t dan uji F. Hasil penelitian menunjukkan kerapatan Avicennia 700 pohon/Ha dan 1.000 pohon/Ha berbeda dalam memproduksi serasah daun yaitu 2.21 gram/m²/hari dan  6,80  gram/m²/hari, sementara kerapatan Rhizophora 500 pohon/Ha, 900 pohon/Ha dan 1.000 pohon/Ha berturut-turut menghasilkan 4,81 gram/m²/hari, 5,21 gram/m²/hari, 7  gram/m²/hari belum menunjukkan perbedaan  dalam memproduksi serasah daun.
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

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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.
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.
Variasi Kerapatan Semai terhadap Pertumbuhan Suhartati, Tatik
Jurnal Wana Tropika Vol 3 No 2 (2013)
Publisher : Fakultas Kehutanan Institut Pertanian STIPER Yogyakarta

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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