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All Journal Jurnal Penelitian Ekosistem Dipterokarpa Daun: Jurnal Ilmiah Pertanian dan Kehutanan ULIN: Jurnal Hutan Tropis Wood Research Journal : Journal of Indonesian Wood Research Society

Erwin Erwin

Faculty Of Forestry, Mulawarman University, Jl. Ki Hajar Dewantara, Samarinda 7512

Author-ID : 2499998

Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Education Environmental Science

Published : 7 Documents Claim Missing Document

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KEMATIAN TANAMAN GAHARU AKIBAT SERANGAN Heortia vitessoides Moore DI MUARA KEMBANG, KUTAI KERTANEGARA Ngatiman Ngatiman; Erwin Erwin
ULIN: Jurnal Hutan Tropis Vol 4, No 2 (2020)
Publisher : Fakultas Kehutanan Universitas Mulawarman

Gaharu (Aquilara microcarpa Baill) planted in monoculture in 2008 at Muara Kembang, Kutai Kartanegara was attacked by Heortia vitessoides Moore which resulted in the death of the plant. To explain the phenomenon of plant death, this research was conducted by observing the frequency and intensity of attacks, the effect of spacing, and pattern of pests as well. Observations were made on a 100 x 50 m striped plot with two spacing arrangements of 3 x 2 m and 2 x 2.5 m. The difference in attack frequency of H. vitessoides between the two spacing was analyzed statistically using t-test. Plant mortality with a high frequency and intensity of pest attack occurred in the 3 x 2 m spacing of the area with a monoculture planting system. Monoculture planting systems triggered patterns of attack and behavior of pests attacking throughout the year with a large number of larvae so they can eat all plant leaves. It is recommended that a mixed planting system be applied to gaharu with other useful plant species as well as to prevent and control it early if H. vitessoides pests are found before it spreads that cause plant death.

Ciri Makroskopis, Kekerasan dan Berat Jenis Fosil Kayu Asal Desa Purwajaya Kutai Kartanegara Robin Sulistyo; Nani Husien; Erwin Erwin; Agus Sulistyo Budi
ULIN: Jurnal Hutan Tropis Vol 5, No 1 (2021)
Publisher : Fakultas Kehutanan Universitas Mulawarman

The results showed that macroscopically the studied wood fossils had brick red, gray, yellow, brown, and black in the first sample (FKA), and the second sample (FKB) had white, gray, and light brown colors, which this color difference was probably due to the cells being mixed with other inorganic elements even though they were found in adjacent locations. Another observation of the macroscopic features of the two samples indicated that cells were still obviously visible as on normal wood, such as pores, rays, and axial intercellular canal. Based on the characteristics of AIC, it was found to have general features that were often found in several types of wood in the Dipterocarpaceae family. The results of measuring the hardness value, the two fossil samples have the same hardness value, namely 4 Mohs scale. For the meantime, the specific gravity of the FKA and FKB samples were 2.54 and 2.35, respectively.

Struktur makroskopis dan mikroskopis fosil kayu asal Desa Bangun Rejo, Kabupaten Kutai Kartanegara Mia Maulida; Nani Husien; Agus Sulistyo Budi; Erwin Erwin; Ahmad Aryanto
ULIN: Jurnal Hutan Tropis Vol 6, No 1 (2022)
Publisher : Fakultas Kehutanan Universitas Mulawarman

Tujuan penelitian ini untuk mengetahui stuktur Makroskopis dan Mikroskopis fosil kayu yang ditemukan di Desa Bangun Rejo, Kabupaten Kutai Kartanegara. Pengamatan struktur makroskopis meliputi warna, kekerasan dan berat jenis, sedangkan pengamatan mikroskopis (struktur sel) fosil kayu dilakukan melalui tiga bidang yaitu bidang Transversal (X), Tangensial (T), dan Radial (R) dengan menggunakan Stereo Microscope NIKON SMZ 645 dan Research Microscope Eclipse E400 yang dilengkapi Kamera Nikon. Sel yang dihitung meliputi sel pori (diameter, tinggi dan jumlah sel), sel jari-jari (tinggi, lebar dan jumlah sel, dan persentase sel. Kekerasan dihitung dengan menggunakan alat uji batuan yaitu Diamond selector II, sedangkan berta jenis menggunakan perhitungan standar umum yaitu perbandingan antara massa dan volume benda. Hasil penelitian menunjukkan bahwa secara mikroskopis kedua sampel fosil kayu yang ditemukan adalah fosil Hardwood atau kayu daun lebar yang jenisnya belum diketahui, dengan ciri-ciri memiliki pori, yang kebanyakan terdiri dari pori soliter, jari-jari uniseriate dengan susunan heterogen. Hasil pengamatan makroskopis fosil kayu pada sampel FKM1 memiliki warna coklat gelap, coklat muda dan campuran merah, sedangkan Sampel FKM memiliki warna coklat muda, kuning dan coklat tua. Nilai kekerasan kedua fosil kayu 4 skala mohs dan berat jenis masing=masing sebesar 3,25 dan 3,04

Analisa kerapatan dan kadar abu pada kayu kapur (Dryobalanops sp.) yang terinfeksi jamur pelapuk putih (Schizophyllum commune) Erlina Yustika; Erwin Erwin; Nani Husien; Agus Sulistyo Budi; Sri Wahyuni
ULIN: Jurnal Hutan Tropis Vol 6, No 2 (2022)
Publisher : Fakultas Kehutanan Universitas Mulawarman

Penelitan ini merupakan lanjutan dari penelitian sebelumnya mengenai kehilangan berat kayu kapur (Dryobalanops sp) yang diinokulasi menggunakan jamur pelapuk putih (Schizophyllum commune) dengan nilai kehilangan berat kayu sebesar 0,12%. Inokulasi jamur S.commune dilakukan terhadap sampel Kayu Kapur pada media PDA (Potato Dextrose Agar) dengan masa inkubasi selama 4 minggu, Pengujian nilai kerapatan kayu dan nilai kadar abu dilakukan sebelum dan sesudah inokulasi dengan masing-masing menggunakan standar DIN 32182 dan TAPPI T211 om-93. Hasil penelitian menunjukkan terjadinya perbedaan yang tidak signifikan pada penurunan nilai kerapatan kayu dan peningkatan nilai kadar abu dari kayu kapur yang diinfeksi oleh jamur S.commune pada masa inkubasi selama 4 minggu

Co-Authors Agus Sulistyo Budi Ahmad Aryanto Aida Ainur Fitriah Andrian Fernandes Anisa Lele Erlina Yustika Harlinda Kuspradini Mia Maulida Nani Husien Nani Husien Ngatiman Ngatiman Nuraini Ilavita Ocafyanti Rina Pangesti Robin Sulistyo Shuhei Takemoto Sri Wahyuni Supartini Supartini Yuji Imamura

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