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Iman Yani Harahap

Indonesian Oil Palm Research Institute

Author-ID : 3464688

Agriculture, Biological Sciences & Forestry

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PERAN NAA, GA3, KARBON AKTIF, DAN SUKROSA DALAM KULTUR EMBRIO ZIGOTIK KLON OG HYBRID (Elaeis guineensis JACQ. X Elaeis oleifera) OPEN POLLINATED Ernayunita Ernayunita; Hernawan Yuli Rahmadi; Iman Yani Harahap; Abdul Razak Purba
Jurnal Penelitian Kelapa Sawit Vol 24 No 3 (2016): Jurnal Penelitian Kelapa Sawit
Publisher : Pusat Penelitian Kelapa Sawit

Oil palm OG hybrid genetic potentials are high in term of vegetative and generative traits, such as: low height increment, compact palm, high free fatty acid and high carotenes. However, OG hybrid reproduction is hindered due to its low germination rate. So, alternative method for germination is needed, which is in vitro embryo zygotic culture. This study objective was to reveal the best medium composition for OG hybrid embryo culture by modificated several oil palm basic medium from oil palm tissue culture protocol and to understand the role of plant growth regulators, activated charcoal, and sucrose on in vitro growth and development of OG hybrid embryo. The design used was Completely Randomized Design (CRD) with 16 replication and 4 embryos for each replicates, while the treatments were: A1 = M129 (control); A2 = M129 + activated charcoal; A3 = M129+ activated charcoal + sucrose; A4 = ½ M129 + activated charcoal + sucrose; A5 = M129 + GA3 ; and A6 = M129 + GA3 + NAA. From the study we found that the best medium for OG hybrid open pollinated clone's embryo culture was M129 with GA3 and NAA (A6). This medium gave percentage of in vitro germination up to 14.06%, and later on the plantlets from this medium gave the best vegetative growth performance such as high number of leaves and primer roots.

PRODUKSI JENIS KELAMIN TANDAN BUNGA KELAPA SAWIT DAN RESPONSNYA TERHADAP PERLAKUAN EXOGENOUS HORMONE TANAMAN PADA LAHAN YANG MENGALAMI KEKERINGAN Iman Yani Harahap; Sumaryanto Sumaryanto; Taufiq Caesar Hidayat; Wan Rizki Fauzi; Yusran Pangaribuan
Jurnal Penelitian Kelapa Sawit Vol 25 No 1 (2017): Jurnal Penelitian Kelapa Sawit
Publisher : Pusat Penelitian Kelapa Sawit

To determining effects of drought on the oil palm sex inflorescene and its response on plant hormone treatmet under drought condition. Then it was carried out the serial treatment at indonesian oil palm research institute (IOPRI) field area trial in Pulau Maria, Asahan District, North Sumatra during 4 year (2013 until midle of 2016). These area having flat topography class with sandy loam texture of typic paleudult soil type and suffering frequently of 200- 460 mm water deficit per year. The trial were undertaken on oil palm tenera's type with 8 years old (planted in 2005). The trial including, 4 kind of phytohormone plus the control treatment, which treated on plant with several of dose and frequency. The phytohormone were IAA (auxsin, Indole-3-acetic acid), BAP (citokinin, 6-benzylaminopurine), GA_3 (gibberelline, gibberellic acid), dan ABA (absisic acid). The dose of each of these kind of hormone were 100, 300, dan 500 ppm, with frequenscy application once and twice per year. The trial design following randomized block design with 3 replicated. Individual unit treatment was the indivduplant. The variable that observed were female, male, and aborted inflorescence; number of frond production; and vegetative growth (height of plant and length of rachis frond). Analysis effect the drought on oil palm sex inflorescene were done by correlation analysis between rainfall and water deficit with inflorescene production. The result shown drought period decline of female inflorescense, and increasing male and aborted inflorescense. Auxin (IAA) treatment, induced vegetatif growth, but contrarily, declining female inflorescense production and increasing male and aborted inflorescense. Gibberelline (GA_3) treatment, decreasing commonly female inflorescense production, and increasing male and aborted inflorescense, mainly in the certain peak of drought periods. Citokinin (ABA) and absicic asid (ABA), tend tokeep female inflorescense production in drought condition, in a way reducing number of aborted inflorescense. Citokinin (BAP), was dominantly plant hormone to keep female inflorescense production.

ASSESSMENT MODEL MUKA AIR TANAH PADA PERTANAMAN KELAPA SAWIT DI LAHAN BERBUKIT Iman Yani Harahap; M. Edwin Syahputra Lubis
Jurnal Penelitian Kelapa Sawit Vol 25 No 2 (2017): Jurnal Penelitian Kelapa Sawit
Publisher : Pusat Penelitian Kelapa Sawit

The aim of this research is to assess performance of developed water table model on oil palm area in a hilly land. The model requires some data of initiatial condition, input model, and physical parameters of the soils and crops. Initial data includes leaf area index, latitude geography position, initial water table, and the deep of impermeable soil layer. Input model includes daily weather data (rainfall, temperature, solar radiation, and wind speed). Soil physic parameters includes bulk volum density at each soil layers, and run-off of the soil surface. The crop parameters includes rainfall interception of crown and stem plants. Daily water table measurement was carried out at 3 points of wells located in one line hilly catena (30 – 70 m above sea level) with slope about of 15% (top, middle, and foot). The area was the 20 years old oil palm planting area, soil type was Typic Hapludult with coarse to fine soil texture, hydraulic conductivity was classified as fast. The water table in this area was located in unconfined aquifer zone. The results showed that outputs of the model were 3 - 4% higher than the actual values observed on the top hill, 7 – 8% lower than the actual values on the middle sloping of the hill, and 7 – 7.5% lower than the actual values on the foot hill. The high rate of run-off at the top might have reduced the water inflow (through infiltration process) to the system, causing output values of the model were higher than the actual values. On the other hand, the water inflow from the top to the lower area might have increased the water inflow to the system, so that the actual values were higher than the output values of the water table model. Adjustments of parameters mainly run-off rate and hydraulic potential gradient on sloping and hilly physiography might increase the accuracy of the model.

ANALISIS FINANSIAL DAN EKONOMI TANAMAN SELA JAGUNG DAN KEDELAI PADA TANAMAN KELAPA SAWIT BELUM MENGHASILKAN Muhammad Akmal Agustira; Ilham Lubis; Eka Listia; Erwin Nyak Akoeb; Iman Yani Harahap; M. Edwin S. Lubis
Jurnal Penelitian Kelapa Sawit Vol 26 No 3 (2018): Jurnal Penelitian Kelapa Sawit
Publisher : Pusat Penelitian Kelapa Sawit

Maize and soybean can be planted for intercropping on immature oil palm, however its financial and economycal aspects have not been widely studied. This study was aimed to analyze the financial and economic aspects of intercropping of maize and soybean on immature oil palm, level of land use efficiency, and comparison of efficiency between monolculture and intercropping system. The study located in Sorolangun Experimental Station, District of Sorolangun, Jambi. Methods used in the study were farming business analysis, Revenue Cost Ratio (RCR), Return on Investments (ROI), Land Equivalent Ratio (LER), and Land Equivalent Optimize Ratio (LOER). The results showed that maize had a profit level of Rp 9,676,564/ha/growing season, RCR 1.76; ROI 188.28% (three growing seasons per year), while soybean had a profit level of Rp 4,059,352/ha/growing season, RCR 1.51 and ROI 75.22% (three growing seasons per year). Based on these results, intercropping of maize and soybean on immature oil palm are economically and financially feasible. For the land use efficiency, corn LER value for corn and soybean was 0.95 and 0.85, respectively, showing that yield of maize and soybean from intercropping system (effective land area of 7,200 m2 per ha of oil palm area) was 95% and 85% when compared to monoculture system. The LOER value of corn and soybeans per ha was 1.32 and 1.18, respectively, which showed that corn and soybeans growing on intercropping system with immature oil palm were more efficient than monoculture system at the same size of land. Based on those comparative analysis of economic values, financial, and land use efficiency, corn was a better alternative crop for intercorpping on immature oil palm than soybean.

Co-Authors Abdul Razak Purba Eka Listia Ernayunita Ernayunita Erwin Nyak Akoeb Hernawan Yuli Rahmadi Ilham Lubis M. Edwin S. Lubis M. Edwin Syahputra Lubis Muhammad Akmal Agustira Sumaryanto Sumaryanto Taufiq Caesar Hidayat Wan Rizki Fauzi Yusran Pangaribuan

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