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All Journal Jurnal Agroforestri Indonesia Jurnal Ilmu dan Teknologi Kayu Tropis JURNAL HUTAN TROPIS
Aji Winara
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Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences

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Diversity Of Soil Macrofauna On Several Land Use On Peatlands Wuri Handayani; Aji Winara
Jurnal Agroforestri Indonesia Vol 3, No 2 (2020): Jurnal Agroforestri Indonesia
Publisher : Balai Litbang Teknologi Agroforestry, Ciamis

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jai.2020.3.2.77-88

Abstract

Peatlands are very vulnerable to land use change. Some of the current peatland cover conditions include agricultural cultivation lands, plantations, shrubs and secondary forest. The presence of soil macrofauna as a soil ecosystem engineer can be a bio-indicator of peatland fertility. This study aims to analyze the diversity of soil macrofauna in several patterns of peat land use in cultivated areas. The research was conducted in December 2017 in Rasau Jaya District, Kubu Raya Regency, West Kalimantan Province. The research method used is monolithic technique with descriptive data analysis using the alpha and beta diversity index approach. The results showed that the diversity and diversity of macrofauna species on peatlands were classified as medium and low, with the highest diversity found in secondary forest patterns (H '= 2.09) and the lowest in oil palm plantations (H' = 0.73), while species richness was found. The highest was found in secondary forest (R '= 4.01) and the lowest was in oil palm plantations (R' = 1.42). The highest population density and abundance were the order Isoptera and Opisthopora, while the lowest is Dermaptera. Several groups of macrofauna which are used as bioindicators of land fertility are found in all land use patterns with  the dominan order is Isoptera and Opisthopora. Soil temperature and acidity conditions affect soil macrofauna population density. The presence of diverse vegetation and adequate canopy can affect environmental conditions and the diversity of soil macrofauna. Based on the diversity of soil macrofauna, cultivation with an agroforestry pattern is preferable to peatlands.
Kualitas Minyak Kayu Putih Hasil Penyulingan Daun Asteromyrtus symphiocarpa pada Musim Hujan dan Kering (The Quality of Cajuput Oil Distilled from the Leaves of Asteromyrtus symphiocarpa on Rainy and Dry Season) Ary Widiyanto; Aji Winara; Edy Junaidi; Mohamad Siarudin; Yonky Indrajaya
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 15, No 2 (2017): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (201.028 KB) | DOI: 10.51850/jitkt.v15i2.391

Abstract

Wasur National Park, located in Merauke Regency, Papua, has various vegetation that could potentially yield cajuput oil, particularly those originated from Myrtaceae family. Among those are Asteromyrtus symphiocarpa. This research aimed to analysis the quality of cajuput oil distilled from the leaves of A. symphiocarpa. Initially, some amounts of leaves sample were plucked, either in the rainy and dry season. The distillation took place in the batch kettle, and each batch was charged of 12 kg of each fresh leaves. The distillation lasted for 4-5 hours, and every 30 minutes, the distilled oil was collected cumulatively. The cajuput oil from the leaves plucked on rainy season afforded the yield of 0.16%, specific gravity of 0.943, refractive index of 1.462, solubility in alcohol 1:1, optical rotations -5.2, and cineole content of 68%. Meanwhile, the corresponding value from those plucked in dry season were 0.33%, 0.912, 1.459, 1:1, -2.1, and 80%, respectively. The qualities of the overall cajuput oil from A. symphiocarpa leaves could satisfy the SNI 06-3954-2006 and belonged the main (U) class. With higher yield and greater cineole content, the cajuput oil obtained from the dry season’s leaves exhibited better qualities; hence it is more potential to be developed commercially.Keywords: Asteromyrtus symphiocarpa leaf, cajuput oil, dry season, rainy seasons.
Aktivitas Antifungi Ekstrak Akar Mahoni terhadap Isolat Botryodiplodia theobromae Pat. Penyebab Mati Pucuk pada Bibit Jabon (Antifungal Activity of Mahogany Root Extracts against Botryodiplodia theobromae Pat. Isolate Causing Dieback on Jabon Seedling) Syamsul Falah; Achmad Achmad; Aji Winara
Jurnal Ilmu dan Teknologi Kayu Tropis Vol 13, No 1 (2015): Jurnal Ilmu dan Teknologi Kayu Tropis
Publisher : Masyarakat Peneliti Kayu Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (459.325 KB) | DOI: 10.51850/jitkt.v13i1.363

Abstract

Dieback on jabon (Anthocephalus cadamba (Roxb.) Miq.) seedling caused by fungi Botryodiplodia theobromae Pat. decreased seedling’s quality and nurseries economic benefits. The control of dieback pathogen on jabon seedling used biofungicide from plant extract have not been studied intensively nowadays. Mahogany (Swietenia macrophylla King.) is one of the promising medicinal plants in Indonesia but its utilization as a biofungicide specially for controlling the dieback on jabon seedling has not been reported. This research aimed to examine the antifungal activities of mahogany root extracts against B.theobromae isolate causing dieback on jabon seedling in vitro. The poisoned food technique was used in assay of the antifungal activities of mahogany root extract. The result showed that mahogany root extract has antifungal activities against B.theobromae with the highest efective growth inhibition was the metanol solvent on 50% concentration level. Microscopical examination showed the inhibition of mycelium growth was caused by the changes on hyphae morphology and growth direction which were beads formation and curling.Keywords: antifungal, Botryodiplodia theobromae, jabon, mahogany root
POTENSI PRODUKSI DAUN DAN MINYAK KAYU PUTIH JENIS Asteromyrtus symhpyocarpa DI TAMAN NASIONAL WASUR Mohamad Siarudin; Aji Winara; Yonky Indrajaya; Edy Junaidi; Ary Widiyanto
Jurnal Hutan Tropis Vol 1, No 3 (2013): Jurnal Hutan Tropis Volume 1 Nomer 3 Edisi November 2013
Publisher : Lambung Mangkurat University-Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jht.v1i3.1544

Abstract

Penelitian ini bertujuan untuk mengukur potensi produksi daun dan minyak kayu putih jenis A. symphyocarpa yang ada di kawasan TN Wasur. Penelitian dilakukan di lakukan di 3 lokasi dominan A. symphyocarpa: Mbembi, Samleber dan Sota. Pengukuran inventarisasi potensi vegetasi dilakukan pada 12 plot bersarang berukuran 20 m x 20 m di masing-masing lokasi (total 36 plot). Setiap pohon, tiang dan pancang diukur diameter setinggi dada dan jumlah dahannya, sementara tingkat semai dicacah jumlahnya. Sejumlah 9 sampel individu mewakili tingkat pohon, pancang dan tiang diambil 3 dahan per pohon kemudian timbang daunnya untuk memperkirakan berat daun per individu pohon. Hasil penelitian menunjukkan bahwa tingkat tiang memiliki produksi daun kayu putih per pohon tertinggi dibanding tingkat pertumbuhan lainnya. Ketersediaan jenis A. symphyocarpa yang paling potensial untuk dipanen daunnya pada saat ini ada di tingkat pancang dan tiang berdasarkan kelimpahan di alam dan produksi daun per individu. Perkiraan total potensi produksi daun kayu putih jenis A. symphyocarpa di TN Wasur saat ini adalah 15.139,8 ton. Rata-rata potensi minyak kayu putih dari jenis A. symphyocarpa adalah 17,21 liter/ha atau total seluruh kawasan TN Nasional Wasur saat ini mencapai 402.450,45 liter.Kata kunci: Pohon, tiang, pancang, semai, minyak kayu putih
Co-Authors Achmad Achmad Ary Widiyanto Edy Junaidi Mohamad Siarudin Mohamad Siarudin Syamsul Falah Wuri Handayani Yonky Indrajaya