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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

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
Co-Authors Pebriansyah Pujasa, Dwita Raharjo, Hedy Ris Hadi Purwanto Setyarso, Agus Sumardi . Woesono, Hastanto Bowo