Stem Biomass Equation of Eucalyptus urophylla S.T. Blake

Eucalyptus urophylla is one of the typical plants of the Province of East Nusa Tenggara,  Indonesia whose distribution includes the islands of Timor, Alor, Wetor, Flores, Adonara, Lomblen, and Pantar. The best land for the growth of E. urophylla is an area with rainfall above 1000 mm every year. E. urophylla dominate the island of Timor hence the potential to absorb carbon and store it in biomass as part of climate change mitigation. This study aims to determine the allometric equation model to predict the potential of E. urophylla stem biomass. Calculation of the amount of stem biomass based on allometric equations is an analytical method used in this study. The sample trees used in equation modeling is 100 trees as a result of the inventory. The equations that can be used to estimate the biomass potential of the stem of  E. urophylla in Timor Island were ln  = -2.12 + 2.472 ln ( ) and (R2= 0.98); ln  = -3.617 + 1.046 ln  and (R2= 0.99); and ln  = -3.510 + 2.157 ln ( ) + 0.983 ln  and (R2= 0.99). The stem biomass potential with the model I amounting to 276.877 tons ha-1, model II of 279.671 tons ha-1, and model III of 280.209 tons ha-1

Model Pendugaan Volume Tegakan Jati (Tectona grandis Linn.F) di Hutan Produksi Wemata Unit Pelaksana Teknis Daerah Kesatuan Pengelolaan Hutan Wilayah Kabupaten Belu

Pendugaan model tegakan jati (Tectona grandis Linn.f) di kawasan hutan produksi Wemata dilakukan pada 150 pohon contoh, dimana sebanyak 90 pohon menjadi pohon model dan 60 pohon dijadikan dasar untuk memvalidasi model yang telah disusun. Tujuan penelitian ini adalah untuk menentukan potensi tegakan jati (Tectona grandis Linn.f) berdasarkan model terbaik yang terpilih. Hasil penelitian menunjukkan bahwa potensi tegakan jati seluas 154, 741 ha sebanyak 26.259,4 m3 – 27.420,1 m3. Penentuan model terbaik berdasarkan nilai koefisien determinasi (R²), bias (SEE), dan validasi model berdasarkan nilai rata-rata deviasi (SR), deviasi aggregate (SA), root mean square of deviation (RMSE) dan bias (e). model yang terbaik berdasarkan kriteria-kriteria tersebut adalah V = -0.17 + 0.865 D2T (R² = 98.1 %), SEE = 0.095, SR = 0.436%, SA = 0.18%, RMSE = 0.78 dan e = 0.33. dengan potensi tegakan jati (Tectona grandis Linn.f), sebesar 36.001,017m3- 37.741,329 m

SIMPANAN KARBON DUA JENIS VEGETASI HUTAN KERING TROPIKA DI WILAYAH SEMI ARID NUSA TENGGARA TIMUR

Dry forests in semi-arid region plays important roles in humans’ life, whether it is socially, economically, or ecologically. Most of the time, it is very difficult to maintain the equilibrium of those roles, especially in developing-country where the economic role is more exploited than the other roles. This mismanagement of forests would lead to the situation where the forest will be in rapid retreat. On the other hand, maintaining as well as increasing the forests is the most essential solution for climate change, as forests play integral part on carbon sequestration therefore stabilizing the climate. In carbon sequestration, plants incorporate carbon from atmospheric carbon dioxide (CO2) through photosynthesis then storing it in biomass and soil. As each vegetation has different capacity to store carbon, this study tries to estimate the absorption rate of carbon dioxide (CO2) and the potential carbon storage of Borneo camphor (Dryobalanops aromatica) and Kesambi (Schleichera oleosa) in Oebatu Dano Ina forest (RTK.24) Pantai Baru sub-district, Rote Ndao district, Nusa Tenggara Timur province. The result shows carbon storage range of 6.51–42.998 ton/ha for both vegetation with average of 0,135–1,791 ton/ha for each tree, while the average of carbon dioxide (CO2) absorption rate is 0,498–6,575 ton/ha for each tree

Karakteristik Tegakan Hutan Tanaman Jati di Wilayah Kesatuan Pengelolaan Hutan Kabupaten Kupang

Kegiatan pengelolaan hutan tanaman jati merupakan salah satu faktor yang dapat mempengaruhi karakteristik tegakan hutan, misalnya untuk kegiatan penebangan yang tidak sesuai dengan konsep riap dapat berdampak pada perubahan kondisi karakteristik dan berpengaruh terhadap potensi  tegakan hutan jati untuk siklus tebang berikutnya. Penelitian ini bertujuan untuk mendapatkan gambaran tentang karakteristik tegakan hutan jati di kawasan Kesatuan pengelolaan Hutan (KPH) Kabupaten Kupang Provinsi Nusa Tenggara Timur. Dengan kegiatan penelitian ini diharapkan dapat diketahui kondisi terkini tegakan jati, kemudian digunakan untuk menduga kondisi tegakan jati pada masa yang akan datang dengan memperhatikan riap dan dinamika struktur tegakannya. Dari penelitian ini dapat diketahui bahwa di areal hutan tegakan jati di KPH Kabupaten Kupang memiliki keragaman karakteristik tegakan dalam hal jumlah pohon, diameter, tinggi dan volume pohon jatinya. Secara keseluruhan diperoleh jumlah pohon pada klaster pengamatan sebanyak 268 pohon jati (Klaster 1= 91 pohon, Klaster 2 = 87 pohon dan Klaster 3 = 90 pohon). Perlu kajian lebih lanjut untuk mengetahui perkembangan tegakan pada masa yang akan datang berdasarkan pengamatan dan pengukuran terhadap petak ukur permanen (PUP), selanjutnya informasi tersebut dapat digunakan sebagai bahan pertimbangan dalam penentuan sistem silvikultur pada rotasi tebang berikutnya

A Review of Termite for Sustainable Green Building

Although 3106 termite species have been documented worldwide, little information is available on those in Indonesia. In this review, the Google Scholar search platform was used to obtain information on termite species. From the 34 reviewed sources, they were identified in 4 provinces across Indonesia. Among these sites, we found 106 termite species from the islands of Sumatera, Kalimantan, Sulawesi, and Java. The most predominant species in all regions were Macrotermes sp, Microtermes sp, and Coptotermes sp

Analisis Komposisi dan Struktur Vegetasi Hutan (Studi Kasus: Taman Wisata Alam Camplong dan Taman Wisata Alam Baumata Kabupaten Kupang)

This study aims to analyze the species composition and vegetation structure in the succession process in the Natural Recreation Park (NRP) of Kupang District, East Nusa Tenggara Province. Data collection using vegetation analysis on two NRP namely Baumata and Camplong. Research shows that the highest important value index of the seedling level is krinyu (Chromolaena odorata L.) in Baumata NRP (115 %), sapling is johar (Senna siamea) in Camplong NRP (141 %), and for pole and tree are kesambi (Schleichera oleosa, Merr) and jati (Tectona grandis linn. F) on Baumata NRP about 135,5% and 137,1%, respectively. A high value of seedling density indicates that all research location in the succession process