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All Journal AGRIVITA, Journal of Agricultural Science ULIN: Jurnal Hutan Tropis
Syahrinudin, Syahrinudin
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Agriculture, Biological Sciences & Forestry Environmental Science

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Pemecahan dormansi benih kemenyan (Styrax sumatranus J.J. SM) dengan perlakuan perendaman dan pemeraman Marjenah, Marjenah; Kiswanto, Kiswanto; Simanjuntak, Janri; Hartati, Wahjuni; Syahrinudin, Syahrinudin
ULIN: Jurnal Hutan Tropis Vol 8, No 2 (2024)
Publisher : Fakultas Kehutanan Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32522/ujht.v8i2.14860

Abstract

Kemenyan (Styrax sumatranus J.J. Sm) termasuk salah satu jenis tumbuhan penghasil resin. Getah kemenyan merupakan komoditi khas Sumatra Utara yang bernilai ekonomi tinggi.  Tujuan penelitian ini untuk mengetahui pengaruh variasi perendaman dan pemeraman perkecambahan benih terhadap persentase kecambah, daya kecambah, dan laju perkecambahan kemenyan (Styrax sumatranus J.J. Sm). Penelitian ini menggunakan pola Rancangan Acak Lengkap Faktorial dengan      perlakuan perendaman (A) yang terdiri dari 4 level yaitu A0 (tidak direndam) A1 (direndam dalam air mengalir), A2 (direndam dalam air kelapa), A3 (direndam dalam air biasa) dan perlakuan pemeraman (B) yang terdiri dari 4 kategori yaitu  B0 (tidak diperam), B1 (diperam 1 hari), B2 (diperam 2 hari), B3 (diperam 3 hari). Dua faktor tersebut dikombinasikan sehingga terdapat 16 kombinasi perlakuan dan 3 kali ulangan untuk setiap kombinasi perlakuan. Hasil penelitian menunjukkan bahwa ada pengaruh antara kombinasi pemeraman dan perendaman terhadap benih kemenyan (Styrax sumatranus J.J. Sm). Benih kemenyan yang direndam dengan air kelapa serta lamanya pemeraman, memberikan pengaruh terhadap beberapa parameter yaitu persentase hidup kecambah sebesar 67%, rataan daya kecambah sebesar 75%, rata-rata hari berkecambah yaitu 82 hari.
Biochar and liquid fertilizer differently affect bulk density of Spodosols and Ultisols Hartati, Wahjuni; Sherlyani, Stella; Syahrinudin, Syahrinudin; Sudarmadji, Triyono
ULIN: Jurnal Hutan Tropis Vol 9, No 1 (2025)
Publisher : Fakultas Kehutanan Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32522/ujht.v9i1.16916

Abstract

Ultisols and Spodosols are soils with contrasting properties - Ultisols are clay-rich while Spodosols are sand-dominated. Soil bulk density, which can limit fertility, is an important property needing improvement in these degraded soils. This study aimed to determine how applying biochar combined with liquid fertilizer affects the bulk density of these soils. The research design was a Randomized Complete Block Design (RCBD) with biochar application set as the research factor and length of biochar soaking in liquid organic fertilizer (LOF) set as the research block. Bulk density sampling occurred at three moisture levels - mornings, afternoons, and evenings after watering. Overall, the two soil types responded differently to biochar treatment. Immersion duration and moisture level at sampling did not significantly impact bulk density
The Effect of Fertilization on Growth Response of Porang (Amorphophallus oncophyllus Prain) in Dipterocarp Forests, East Kalimantan Indonesia Kasransyah, Kasransyah; Marjenah, Marjenah; Rujehan, Rujehan; Karyati, Karyati; Ruslim, Yosep; Matius, Paulus; Syahrinudin, Syahrinudin; Soetioso, Rusdi; Wasli, Mohd Effendi; Toma, Takeshi
AGRIVITA Journal of Agricultural Science Vol 47, No 2 (2025)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v47i2.4357

Abstract

The use of forest land under dipterocarp for agroforestry is hindered by the problem of low fertility, necessitating the application of fertilization from organic materials, such as manure, compost, or biochar. These materials provide essential nutrients, including nitrogen, carbon, phosphorus, and potassium, increase cation exchange capacity (CEC), neutralize the pH, and enhance soil texture and water retention. This study aims to determine the effect of fertilization on the growth of Porang in the dipterocarp forest in PT Utama Damai Indah Timber East Kalimantan. It was conducted from August 2021 to July 2022. A completely randomized design (CRD) was used with three replications at five treatment levels: manure 1000 g/plant (P1), compost 1000 g/plant (P2), biochar + manure 1000 g/plant (P3), biochar + compost 1000 g/plant (P4), and control without fertilization (P0).  Data analysis was performed using ANOVA, followed by the Duncan test at a 10% level. The results showed that applying organic fertilizer enhanced soil's physical and chemical properties significantly. The combination of biochar and manure, at 1000 g/plant, proved to be the most effective treatment for increasing the height and yield of Porang compared to the control and other treatments.
Co-Authors Karyati Karyati Kasransyah, Kasransyah Marjenah, Marjenah Paulus Matius RR. Ella Evrita Hestiandari Rujehan, Rujehan Sherlyani, Stella Simanjuntak, Janri Soetioso, Rusdi Sudarmadji, Triyono Toma, Takeshi Wahjuni Hartati Wasli, Mohd Effendi Yosep Ruslim