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All Journal AGRIVITA, Journal of Agricultural Science ULIN: Jurnal Hutan Tropis Jurnal Agriment VISA: Journal of Vision and Ideas
Syahrinudin, Syahrinudin
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Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance Environmental Science Languange, Linguistic, Communication & Media Public Health Social Sciences

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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.
Less Steep Slope Stored More Soil C than Those Steep Ones: A Case Study in HPFU Samarinda hartati, Wahjuni; Piri, Wandri L; Sudarmadji, Triyono; Syahrinudin, Syahrinudin
JURNAL AGRIMENT Vol. 9 No. 2 (2024): Desember 2024
Publisher : Politeknik Pertanian Negeri Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51967/jurnalagriment.v9i2.3193

Abstract

Global warming is a phenomenon of increasing global temperature of the earth from year to year due to the greenhouse effect that contains greenhouse gases (GHG) one of which is carbon dioxide (CO2), thereby increasing the absorption of heat released by the earth into the atmosphere, forests have a contribution as a provider of environmental services as an absorber of carbon dioxide (CO2). Hutan Pendidikan Fahutan Unmul (HPFU) is an area with forest status in Samarinda and is currently still dominated by land cover in the form of young secondary forest. this study was conducted to estimate the C reserves stored in the soil under the young secondary forest cover, determine its contribution to the total C reserves in the young secondary forest and estimate the potential of the total C reserves in the soil in HPFU. PUP is made measuring 20 m x 20 m on secondary forest cover with gentle slope (L2) to slightly steep (L3) at the top, middle, and bottom of the slope. In each slope do repetition as much as 3 times. In each PUP, a whole soil sample was taken using a sample ring and the soil was disturbed using a hoe at 3 depths,namely : 0-10 cm, 10-20 cm, and 20-30 cm. young secondary forest cover dominates the HPFU area on a gentle to rather steep slope. the C content of soil as deep as 30 cm in the sloping Slope area is 75.29 tons/ha with a total reserve of C is 5,499.80 tons and in a rather steep slope area is 54.69 tons/ha with a total reserve of C is 3,822. 83 tons
Pengaruh Aplikasi Solid Decanter dan Biochar terhadap Kadar Hara dalam Air Lindi Tanah Pascatambang Batu Bara Christiani, Dwi; Hartati, Wahyuni; Syahrinudin, Syahrinudin
VISA: Journal of Vision and Ideas Vol. 4 No. 3 (2024): VISA: Journal of Vision and Ideas
Publisher : IAI Nasional Laa Roiba Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47467/visa.v4i3.4871

Abstract

Open pit coal mining activities affect the decline in soil quality characterized by damage of soil structure, loss of nutrients and decreased biodiversity. Organic matter is one of the soil reformers that has been felt its benefits in improving soil properties both physical, chemical, and bi ological properties. This study aims to determine the effect of solid and biochar administration on post coal mining soil on water storage capacity and giraffe power on nutrients in percolation water administration. This research was carried out at the Laboratory of Soil Science and Forest Nutrition, Mulawarman Samarinda University, East Kalimantan following the rules of Factorial Complete Random Design with two factors, namely solid percentage and biochar with percolation water treatment during the one month incubation period. The results showed the application of S2B2 (solid 20% + biochar 25%) was able to have an influence on water giraffe power with a three day incubation period end value of 92.2 ml, fifteen days of 89.3 ml and thirty days of 85.6 ml. The application of biochar 5% and 25% in post coal mine soils of fifteen days and thirty days incubation period shows the ability to absorb calcium nutrient levels in leachate water. The combined application of S2B2 (solid 20% + biochar 25%) showed a good ability to absorb calcium and magnesium nutrient levels in leachate water that decreased during the incubation period.
Co-Authors Christiani, Dwi Hartati, Wahyuni Karyati Karyati Kasransyah, Kasransyah Marjenah, Marjenah Paulus Matius Piri, Wandri L RR. Ella Evrita Hestiandari Rujehan, Rujehan Sherlyani, Stella Simanjuntak, Janri Soetioso, Rusdi Sudarmadji, Triyono Toma, Takeshi Wahjuni Hartati Wasli, Mohd Effendi Yosep Ruslim