Articles

PENGELOLAAN PANEN KELAPA SAWIT (ELAEIS GUINEENSIS JACQ.) DI AFDELING 5 KEBUN TINJOWAN, SUMATERA UTARA Simanjuntak, Hiskia; Yahya, Sudirman
Buletin Agrohorti Vol. 6 No. 2 (2018): Buletin Agrohorti
Publisher : Departemen Agronomi dan Hortikultura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (286.257 KB) | DOI: 10.29244/agrob.6.2.241-249

Abstract

Penelitian telah dilaksanakan di Kebun Tinjowan, Kabupaten Simalungun, Sumatera Utara bertujuan melatih keterampilan dan kemampuan dalam bidang perkebunan, serta memperoleh pengalaman kerja secara langsung dengan mempelajari aspek teknis maupun manajerial. Hal yang diamati dalam pengelolaan panen adalah angka kerapatan panen, kehilangan hasil, taksasi produksi, kualitas pekerjaan panen, rotasi panen, kriteria panen, kebutuhan tenaga panen, sarana dan prasarana panen, organisasi panen, serta transportasi panen. Hasil pengamatan menunjukkan pengelolaan panen perlu ditingkatkan. Pencegahan kehilangan hasil perlu digalakkan.
OPTIMASI PAKET PUPUK TUNGGAL PADA TANAMAN KELAPA SAWIT BELUM MENGHASILKAN UMUR SATU TAHUN Saputra, Hidayat; ,, Sudradjat; ,, Sudradjat; Yahya, sudirman; Yahya, sudirman
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 43 No. 2 (2015): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (414.018 KB) | DOI: 10.24831/jai.v43i2.10423

Abstract

ABSTRACTEffective and efficient fertilization is affected by fertilizer dose, and therefore information on the appropriate dose of a single fertilizer for oil palm will be beneficial to increase the efficiency and effectiveness of fertilization in oil palm plantations. The objectives of this research were to study the response patterns and to determine optimum rate of single fertilizer package related to the growth of one year old oil palm trees. The experiment was conducted from March 2013 to February 2014 at IPB-Cargill Teaching and Research Farm of Oil Palm, Jonggol Bogor. The experiment was arranged in randomized block design with one factor and replicated three times. The treatments were four single fertilizer package as followed: control, 300 g urea + 375 g SP-36 + 350 g KCl + 25 g boric acid + 25 g CuSO4.5H2O, 600 g urea + 750 g SP-36 + 700 g KCl + 25 g boric acid + 25 g CuSO4.5H2O, 900 g urea + 1125 g SP-36 + 1050 g KCl + 25 g boric acid + 25 g CuSO4.5H2O per plant. The result showed that application of single fertilizer package significantly increased the growth of young oil palm linearly as shown by plant height, stem girth, leaf area of frond number 9, chlorophyll and P content of the leaves and quadratically on leaf number at the last observation. The optimum rate of single fertilizer for one year old oil palm trees had not been attained at this research because the plant growth response to fertilization was still linear.Keywords: inorganic, leaf frond number 9, optimum rate, growth response, stem girth
OPTIMASI PAKET PUPUK TUNGGAL PADA TANAMAN KELAPA SAWIT BELUM MENGHASILKAN UMUR SATU TAHUN Saputra, Hidayat; ,, Sudradjat; ,, Sudradjat; Yahya, sudirman; Yahya, sudirman
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 43 No. 2 (2015): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (414.018 KB) | DOI: 10.24831/jai.v43i2.10423

Abstract

ABSTRACTEffective and efficient fertilization is affected by fertilizer dose, and therefore information on the appropriate dose of a single fertilizer for oil palm will be beneficial to increase the efficiency and effectiveness of fertilization in oil palm plantations. The objectives of this research were to study the response patterns and to determine optimum rate of single fertilizer package related to the growth of one year old oil palm trees. The experiment was conducted from March 2013 to February 2014 at IPB-Cargill Teaching and Research Farm of Oil Palm, Jonggol Bogor. The experiment was arranged in randomized block design with one factor and replicated three times. The treatments were four single fertilizer package as followed: control, 300 g urea + 375 g SP-36 + 350 g KCl + 25 g boric acid + 25 g CuSO4.5H2O, 600 g urea + 750 g SP-36 + 700 g KCl + 25 g boric acid + 25 g CuSO4.5H2O, 900 g urea + 1125 g SP-36 + 1050 g KCl + 25 g boric acid + 25 g CuSO4.5H2O per plant. The result showed that application of single fertilizer package significantly increased the growth of young oil palm linearly as shown by plant height, stem girth, leaf area of frond number 9, chlorophyll and P content of the leaves and quadratically on leaf number at the last observation. The optimum rate of single fertilizer for one year old oil palm trees had not been attained at this research because the plant growth response to fertilization was still linear.Keywords: inorganic, leaf frond number 9, optimum rate, growth response, stem girth
IDENTIFICATION OF GENE RELATED TO HARD BUNCH PHENOTYPE IN OIL PALM (ELAEIS GUINEENSIS JACQ.) ,, Roberdi; ,, Sobir; Yahya, Sudirman; Toruan-Mathius, Nurita; Liwang, Tony
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 43 No. 2 (2015): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (514.814 KB) | DOI: 10.24831/jai.v43i2.10421

Abstract

ABSTRACTMolecular genetic analysis of hard bunch phenomenon in oil palm was done in order to elucidate the role of genetic factor underlying hard bunch in oil palm plantation. The aim of this study was to identify the AFLP primer combination that co-segregates with hard bunch phenotype related gene in oil palm. Molecular analysis was done by bulk segregant analysis approach. DNA was isolated from leaves of the normal and hard bunch palm. DNA from ten individual palms from each category were pooled and used as a template. A total of 56 AFLP primer combinations were selected for selection of polymorphic primer, and as a result it was found that 22 AFLP primer combinations (39.28%) were polymorphic. A total of 48 individual of palm DNA containing 24 individual for each group were further genotyped by those 22 polymorphic markers. Of these, one AFLP primer combination (E-ACC/M-CTG) was obtained as a co-segregated marker that distinguished the hard bunch DNA from the normal one. Based on the analysis of the target sequence aligned to the oil palm DNA sequences available in database, we found that our sequence has similarity with Ty-1 copia retrotransposon. This sequence distribute in all 16 linkage group of oil palm genome.Keywords: abnormal fruits, AFLP, oil palm, Ty-1 copia retrotransposon
PERTUMBUHAN AKAR KEDELAI PADA CEKAMAN ALUMINIUM, KEKERINGAN DAN CEKAMAN GANDA ALUMINIUM DAN KEKERINGAN HANUM, CHAIRANI; MUGNISJAH, WAHYU Q.; YAHYA, SUDIRMAN; SOPANDY, DIDI; IDRIS, KOMARUDIN; SAHAR, ASMARLAILI
AGRITROP Vol. 26, No. 1 Maret 2007
Publisher : AGRITROP

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Abstract

The objective of this research was to study the change of vegetative growth of root on some genotypes soybeanof aluminium toxicity, drought stress, and double stress (Al toxicity and drought stress). Research in rooting systemof soybean is hoped to get more attention, especially for supporting concept of new plant type for high yieldingpotential. Six genotypes of soybean (Slamet, Sindoro, Dieng, Sinyonya, Lumut, and Wilis), treated with aluminiumsaturated (Al 25%, Al 50%, and Al 75%) and field capacity (80% FC and 40% FC). Response of growth vegetativeidentified perception by root dry weight. Result of the study show that only one from six that is genotype Wiliswas tolerant at aluminium toxicity, drought stress, and double stress.
Penggunaan Mikro Irradiasi Sinar Gamma untuk Meningkatkan Keragaman Genetik pada Varietas Kedelai Argomulyo [Glycine max (L) Merr] Hanafiah, Diana Sofia; Trikoesoemaningtyas, Trikoesoemaningtyas; Yahya, Sudirman; Wirnas, Desta
Jurnal Natur Indonesia Vol 14, No 1 (2011)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (369.697 KB) | DOI: 10.31258/jnat.14.1.80-85

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This research used gamma ray irradiation on low doses (micro mutation). The aim of this research was to know the respons of doses level bymicro mutation on gamma ray irridation to the growing and development of Argomulyo variety of Glycine max (L) Merr (M1), the seeds isirradiated by gamma ray by micro mutation was 0 Gy, 50 Gy, 100 Gy, 150 Gy, and 200 Gy. Variation that obtained of each characters atgeneration M1 and M2 influences plants growth and development either through qualitative and quantitative that finally will influence plantsproduction. The average highest genetic variation at M 2 generation of soybean was on 200 Gy doses. Results of the research indicated thatgamma ray irradiation on 200 Gy doses was effective caused of plant variation genetic.
Induced mutations by gamma ray irradiation to Argomulyo soybean (Glycine max) variety HANAFIAH, DIANA SOFIA; *, TRIKOESOEMANINGTYAS; YAHYA, SUDIRMAN; WIRNAS, DESTA
Nusantara Bioscience Vol 2, No 3 (2010): Nusantara Bioscience
Publisher : “Bioscience Community”, School of Graduates, Sebelas Maret University, Surakarta

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Abstract

Hanafiah DS, Trikoesoemaningtyas, Yahya S, Wirnas D. 2010. Induced mutations by gamma ray irradiation to Argomulyosoybean (Glycine max) variety. Nusantara Bioscience 2: 121-125. Induced mutation by gamma ray irradiation is one way to increasegenetic variability of plants. This research used gamma ray irradiation on low doses (micro mutation). The aim of this research was toknow the respons of doses level by micro mutation on gamma ray irridation to the growing and development of Argomulyo variety ofsoybean [Glycine max (L) Merr]. The seeds were irradiated by gamma ray micro mutation doses, namely 0 gray, 50 gray, 100 gray, 150gray, and 200 gray. Variations that were obtained of each characters at generation M1 and M2 influences plants growth and developmenteither through qualitative and quantitative that finally will influence plant’s production. The average highest genetic variation at M2generation of soybean was on 200 Gray doses. Results of the research indicated that gamma ray irradiation on 200 Gray doseseffectively caused of plant variation genetic.Key word: induced mutation, micro mutation, gamma ray irradiation, Argomulyo soybean variety.
Isolation and Identification of Mycorrhizosphere Bacteria and Their Antagonistic Effects Towards Ganoderma boninense in vitro BAKHTIAR, YENNI; YAHYA, SUDIRMAN; SUMARYONO, WAHONO; SINAGA, MEITY SURADJI; BUDI, SRI WILARSO; TAJUDDIN, TEUKU
Microbiology Indonesia Vol 4, No 2 (2010): August 2010
Publisher : Indonesian Society for microbiology

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Abstract

Basal stem rot caused by Ganoderma boninense is the most serious disease of oil palm (Elaeis guineensis) in Indonesia and it has caused major loss in palm oil production.  Mycorrhizosphere bacteria offer possible advantages as biocontrol agents as they live and proliferate together with arbuscular mycorrhizal fungi, which have an ability to increase plant resistance against pathogens.  A study was conducted to isolate mycorrhizosphere bacteria from spores of arbuscular mycorrhizal fungi and test their antagonistic effects against G. boninense in vitro.  All bacterial isolates were identified based on 16S rDNA analysis and it revealed that eleven out of twenty mycorrhizosphere bacteria isolated were related to Bacillus with similarity ranging from 97 to 100%, whereas other isolates were identified as Pseudomonas, Streptomyces, Kocuria, Enterobacter, Brevundimonas, and Alcaligenes with similarities ranging from 96 to 100%.  Fourteen out of twenty mycorrhizosphere bacteria showed a varying degree of inhibition towards the growth of G. boninense in vitro.  Of these, isolate B10 (closely related to Bacillus subtilis ZJ06) showed the highest inhibitory effect followed by B17 (closely related to Bacillus subtilis N43).  Therefore, these bacteria have a potential to be used as biocontrol agents to control basal stem rot disease caused by G. boninense in oil palm.
PERBAIKAN PERTUMBUHAN DAN KUALITAS TANAMAN LIDAH BUAYA DI TANAH GAMBUT DENGAN APLIKASI MIKORIZA ARBUSKULA DAN PEMUPUKAN Sasli, Iwan; Yahya, Sudirman; Sudradjat, ,; Setiadi, Yadi; Sudarsono, ,
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 36 No. 3 (2008): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (167.658 KB) | DOI: 10.24831/jai.v36i3.1384

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This research was aimed at studying the effectiveness of  mycorrhiza, inorganic and organic fertilizer (fish and shrimp waste) on growth, yield and quality of Aloe in peat soil. The study was conducted on peat area, North Pontianak, West Kalimantan. Mycorrhizal application levels (without mycorrhiza, Mycofer and mycorrhizal from pineapple's rhizosphere) were as main-plot. The inorganic fertilizer (composition of N:P:K:Mg) rates (without inorganic fertilizer;  5 : 4 : 7.5 : 2.5 g/plant;  10 : 8 : 15 : 5 g/plant; and  20 : 16 : 30 : 10 g/plant) were as sub-plot.  Organic fertilizers: (fish; shrimp; fermented fish; and fermented shrimp wastes) were as sub-sub plot. The observed variables were: leaf width, leaf length, leaf fresh weight, plant dry weight, and nutrient uptake (N, P, K, Mg). The results showed that mycorrhizal application improved growth performance and increased N, P, Mg uptake. The best plant growth performance was achieved by N : P: K : Mg  =10 : 8 : 15 : 5 g/plant and fermented shrimp waste treatments.  The highest  N, P, K, Mg nutrients uptake was achieved by application of fermented organic  fertilizer.  Combination of mycorrhiza from pineapple's  rhizosphere with fermented fish and shrimp waste resulted in higher amino acids content compared to standard cultivation of  Aloe vera Center in Pontianak.   Key words:  Aloe vera, arbuscular mycorrhiza, inorganic fertilizer, organic fertilizer
PERMODELAN PERTUMBUHAN DAN PRODUKSI KELAPA SAWIT PADA BERBAGAI TARAF PENUNASAN PELEPAH Gromikora, Nope; Yahya, Sudirman; ,, suwarto
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 42 No. 3 (2014): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (754.027 KB) | DOI: 10.24831/jai.v42i3.9179

Abstract

ABSTRACTThe numbers of leaf frond influence oil palm yield, especially fresh fruit bunch weight and fresh fruit bunch production. The objective of this research was to obtain oil palm growth and production model for different levels of frond pruning. The experiment was conducted at PT. Astra Agro Lestari, Pangkalan Bun, Central Kalimantan, from August 2010 to February 2012. The experiment was arranged in a randomized block design with two factors and three replications for each oil palm age. The first factor was numbers of unpruned frond and the second factors was pruning seasons. The frond treatment consisted of 41-48, 49-56, and 57-64 fronds. The pruning seasons consisted of first period (early to mid rainy season: September-December), second period (mid to end of rainy season: Januari-April), and third period (dry season: May-August). Stella production model was created based on pruning experiment and weather data. The constructed production model was able to estimate 75% variable of oil palm production and fresh fruit bunch weight at different levels of pruning. Keywords: oil palm, pruning management, Stella model
Co-Authors , Amisnaipa , Handoko , Hapsoh , Sakhidin , Sudarsono , Suwarto . MIFTAHUDIN . Suwarto . TRIKOESOEMANINGTYAS A. P. Lontoh A. S. Abidin Abdul Bari Abdurrahman Abdurrahman Ade Wachjar ADEEL ABDUL KARIM ALTUHAISH AGUS PURWITO Ahmad S. Abidin ALEX HARTANA Alfian, Anggra Ali Nurdin, Ali AMIN NUR Amisnaipa, - Amperawan Amperawan, Amperawan ASMARLAILI SAHAR Awilham Manurung Bambang S . Purwoko Bambang S. Purwoko Bambang Sapta Purwoko CHAIRANI HANUM D. Wasgito Purnomo Desta Wirnas Diana Sofia Hanafiah Didi Soepandi DIDI SOPANDY DIDY SOPANDIE Dwi Asmono EDI GUHARDJA Febbiyanti, Tri Rappani GEDE WIJANA GUHARJA, Edi H. Pane HAJRIAL ASWIDINNOOR HAPSOH HAPSOH Haridjaja, dan Oteng Hariyadi Hariyadi Hariyadi, nfn HESTI PUJIwATI Hidayat Saputra, Hidayat Ida Nur Istina, Ida Nur IGK. Dana Arsana Ilyas Marzuki IRDIKA MANSUR Iwan Sasli Komaruddin Idris KOMARUDIN IDRIS Kukuh Murtilaksono Kusumawati, Sri Ambar M. Yahya Fakuara M. Zulman Harja Utama Mahulette, Asri Subkhan Mahulette, Asri Subkhan Marenda Ishak S Meity Suradji Sinaga Mira Ariyanti MUHAMMAD AHMAD CHOZIN Muhammad, Fakhry Muhammad, Fakhry MUNIF GHULAMAHDI Nope Gromikora Nunyai, Aslina Putri Nunyai, Aslina Putri Nurita Toruan-Mathius Nurmi . Nurmi Hafid Nurul Khumaida Oteng Haridjaja Pambudi, Ignatius Harry Tri Pambudi, Ignatius Harry Tri R. Poerwanto Rasyad, Sabilal Retno Prihatini Roberdi ,, Roberdi ROEDHY POERWANTO Saijo, . Sakhidin Sakhidin Sandra A. Aziz SANDRA ARIFIN AZIZ Simanjuntak, Hiskia Simanjuntak, Hiskia Siregar, Hasril H. Sitanala Arsyad Slamet Susanto Sobir , Sofiana, Yelli Sofiana, Yelli Sofyan Zaman Sopian Soim, Sopian Sri Mulatsih Sri Wilarso Budi SRIANI SUJIPRIHATI Subandi Subandi SUBRONTO, . SUDARSONO SUDARSONO Sudradjat , Sudradjat Sudradjat Suparno, Antonius SURYO WIYONO Sutarta, Edy Sigit Sutarta Sigit Sutoro Sutoro suwarto , Suwarto Suwarto T. M. H. Oelim TEUKU MUHAMMAD HANAFIAH OELIM Teuku Tajuddin Tony Liwang Tri Rapani Febbiyanti, Tri Rapani TRIKOESOEMANINGTYAS * Trikoesoemaningtyas Trikoesoemaningtyas Wahju Q. Mugnisjah Wahju Qamara Mugnisjah Wahono Sumaryono Wahyu Hidayat WAHYU Q. MUGNISJAH Widiatmaka Widiatmaka Widodo Widodo Yadi Setiadi Yayat Hidayat Yeni Lucia Yenni Asbur YENNI BAKHTIAR