Model Pertumbuhan Tinggi dan Diameter Eucalyptus sp.
DOI:
https://doi.org/10.55180/jwt.v14i1.202Kata Kunci:
growth model, maximum volume cycle, mean annual increamentAbstrak
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.
Referensi
Achmad, E., Nursanti, & Manalu, J. H. B. (2018). Model Spasial Pendugaan Biomassa Di Atas Permukaan Tanah Di Hutan Nagari Padang Limau Sundai Kabupaten Solok Selatan Provinsi Sumatera Barat. Jurnal Silva Tropika, 2(3), 67–76.
Arifiandy, N. U. R. M., Hutan, D. M., & Kehutanan, F. (2006). MODEL PERTUMBUHAN RATA-RATA DIAMETER , RATA-RATA TINGGI DAN VOLUME TEGAKAN Acacia mangium Willd .
Ghozali, I. (2011). Ghozali_Imam_2011_Aplikasi_Analisis_Mult.pdf (hlm. 129).
Mardiatmoko, G. J. H. P. A. B. (2014). Ilmu Ukur Kayu Dan Inventarisasi Hutan. Dalam Suparyanto dan Rosad (Nomor November).
Mindawati, N., Indrawan, A., Mansur, I., & Rusdiana, O. (2010). KAJIAN PERTUMBUHAN TEGAKAN HYBRID Eucalyptus urograndis DI SUMATERA UTARA Growth of Eucalyptus urograndis Hybrid in North Sumatera. Jurnal Penelitian Hutan Tanaman, 7(1), 39–50. https://doi.org/10.20886/jpht.2010.7.1.39-50
Nasution, M. I. R. (2014). Analisis Finansial dan Daur Volume Maksimum Tegakan Eukaliptus Eucalyptus Hybrid (Ind-47) Hutan Tanaman Industri PT. Toba Pulp Lestari, Tbk., Sektor Aek Nauli. Universitas Sumatera Utara.
Pasaribu, D. I., Mardhiansyah, M., & Sulaeman, R. (2016). Kualitas pertumbuhan Eucalyptus sp. Dari perbanyakan vegetatif dan generatif. Jurnal Online Mahasiswa Fakultas Pertanian, 3(1), 1–6.
Putri, S. (2013). Daur Volume Maksimum Tegakan Eucalyptus hybrid (IND- 32) di Hutan Tanaman Industri PT. Toba Pulp Lestari, Tbk., Sumatera Utara. Universitas Sumatera Utara.
Qirom, M. A., & Supriyadi. (2013). Model Penduga Volume Pohon Nyawai (Ficul variegata Blume) Di Kalimantan Timur (Tree volume estimation model for Ficus variegata Blume in East Kalimantan). Jurnal Penelitian Hutan Tanaman, 10(4), 173–184.
Suhartati, T., & Pebriansyah. (2021). Daur Volume Optimal Jati di Hutan Rakyat (Studi Kasus di Desa Girikarto, Kecamatan Panggang, Kabupaten Gunugkidul). Journal Wanatropika, 11(2), 16–25.
Suhartati, T., & Wahyudiono, S. (2023). Pemodelan Hubungan Tinggi dan Diameter Eucalyptus pellita Umur 30 Bulan. 13(01), 9–16.
Suhartati, T., Wahyudiono, S., Andayani, S. T., Saputro, S. H., Kusumaningsing, K. R., Prijono, A., Suryahadi, D., Suwadji, S., & Woesono, H. B. (2022). Buku Petunjuk Teknis Praktek Lapangan Fakultas Kehutanan. Fakultas Kehutanan Institut Pertanian Stiper Yogyakarta.
Vanclay, J. K. (1994). Modelling forest growth and yield: Applications to mixed tropical forests. Modelling forest growth and yield: applications to mixed tropical forests, June.
