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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Indonesian Journal of Agricultural Science Jurnal Pengkajian dan Pengembangan Teknologi Pertanian Jurnal Penelitian Tanaman Industri Jurnal Agrotropika

Bambang S. Purwoko

Departemen Agronomi dan Hortikultura, Institut Pertanian Bogor, Jl. Raya Darmaga, Bogor 16680

Author-ID : 350223

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Economics, Econometrics & Finance Engineering Industrial & Manufacturing Engineering

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Penggunaan Spermin dalam Regenerasi Tanaman pada Kultur Antera Beberapa Aksesi Padi Gogo Purwoko, Bambang S.
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 32 No. 2 (2004): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

The objective of the research was to determine anther culture ability of 7 rice accessions in an improved media supplemented with spermine. The seven accessions were Hawara Bunar, Grogol, Sigundil. Krowal. CT-650-24-J-3. Lembayau, dan Mendali. Media N6 was used for callus induction and MS was used for regeneration. Both media was supplemented with spermine at J0 -4M . Result of the experiment showed that Grogol. Sigundil. and Lembayau gave green plantlet. Sigundil and Mendali possessed highest anther culture ability and therefore best suited for parent in rice breeding involving anther culture technique. Key words: Anther culture, Spermine, Upland rice, Green plant

Analisis Pertumbuhan dan Fenologi Trubus pada Berbagai Struktur Tajuk Durian (Durio zybethinus) Munandar, Aris; Harjadi, Sri S.; Surkati, Ahmad; Purwoko, Bambang S.; Sudarsono, ,; Suhirman, ,
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 32 No. 3 (2004): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Two parallel experiments were conducted to study the effect of training and pruning on the growth and development of durian. Two-years old durian clones Matahari and Monthong had been pruned and or trained for 19 months as open center, central leader, palmette leader and left untreated (control treatment) in five (for Matahari) and six (for Monthong) replications. Training and pruning treatments resulted in more open crown as indicated by lower (35 - 40%) leaf area index, better growth analysis as indicated by better dry matter partition and growth rate. Relative growth rate (RGR) and net assimilation rate (NAR) of trained and pruned trees were high during 12 - 15 months after treatment, although their absolute growth rate cumulative crown dry matter low compared to untreated trees. Compared to pruning \, training treatment gave higher contribution to NAR. Due to wet climate of local Bogor and ontogeny of the durian used in this experiment (at late juvenile stage, 3.5 year old durian), the effect of training and pruning on the development of the durian as observed by flushing phenology had not been revealed. Flushing rhythmic pattern of treated and untreated durian were almost same. Key words: durian, tree architecture, training, pruning, phenology.

Studies on Dormancy Periods and Growth Rhythm of Shoot and Root of Mangosteen (Garcinia mangostana L.) Hidayat, Ramdan; Surkati, Achmad; Poerwanto, Roedhy; Darusman, Latifah K.; Purwoko, Bambang S.
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 33 No. 2 (2005): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Mangosteen has a good prospectus for international market. Many people in the world like this fruit because it is delicious, has high nutrient contents, and it can be consumed as a fresh fruit. The growth of mangosteen is very slow with a very long juvenile period because of its long dormancy period. The objective of this research was to study the dormancy periods and growth rhytm of shoot and root of young and adult mangosteen seedlings. The research used completely randomized design and consisted of two experiments. The first experiment was to study the dormancy and flushing periods. The second experiment was to study the growth patterns of shoot and root foom several ages of mangosteen seedlings. This research was conducted at Mekarsari Fruit Park, Cileungsi, Bogor. The result of the experiment showed that two years old of mangosteen seedling had 5 flushes per year, four years old of mangosteen had 3-4 flushes per year, and eight years old of mangosteen only had 2 flushes. Dormancy periods were significantly different between 2,4 and 8 year of mangosteen seedling. After the seedlings have branches, the dormancy periods become twice as many as that before branching. The roots grew rapidly two weeks before flush and slower after flush occurred. Key words: Garcinia mangostana, dormancy, flush, seedling

Kultur Antera untuk Mendukung Program Pemuliaan Tanaman Padi Dewi, Iswari S.; Purwoko, Bambang S.
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 29 No. 2 (2001): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

The Objectives of rice breeding program in Indonesia is to obtain high yielding varieties, tolerant, resistant to abiotic and biotic stress and appropriate to planting system in specific area. To accelerate the obtainment of the varieties, a combination of conventional and no conventional breeding method can be used. One alternative procedure is anther culture. Doubled haploid lines can be obtained through cholchicine treatment or rattooning of haploid plants. Plants with high heterozygositas (F1 or F2) can be used as anther source to obtain genetic variability of doubled haploid plants. High degree of homozigousity can be obtained at the first (DHO) generation of doubled haploid plants, less than on year. Evaluation of agronomic characters follows m DHI and DH2 generations. Compared to conventional methods, the use of anther culture in rice breeding program has several advantages including efficiency of selection process, reduction of cost, time and labor. Effort to optimize anther culture method and its rize in rice breeding program in Indonesia is discussed. Key words: Anther culture, Rice

Efek Suhu Simpan dan Pelapis terhadap Perubahan Kualitas Buah Pisang Cavendish Purwoko, Bambang S.; Suryana, K.
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 28 No. 3 (2000): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

The objective of the experiment was to determine the effect of coating materials and storage temperatures in inhibiting the ripening process of banana fruits. The experiment consisted of two factors namely storage temperatures (ambient and cool) and coating materials (control, Carnauba wax, bee wax, and Sempefresh). One experimental unit consisted of two fingers of banana. The experiment was replicated three times. Observation was conducted on the following variables: peel color development, weight loss, fruit softening, ratio of flesh and peel weight, sugar content, and titratable acidity. Result of the experiment showed that carnauba wax 6 % inhibited weight loss, fruit softening, and the increase of flesh and peel weight ratio. Bee wax inhibited fruit softening, peel color development and sugar content. Fruit treated with carnauba wax 6 % could be stored at cool temperature for 25.9 days, 10.5 days longer than untreated fruit stored at ambient temperature. Among the three coating materials, Sempefresh had the lowest effectiveness in inhibiting bananaf ruit ripening process. Key words: Coating, Ripening, Banana, Shelf life

Pengaruh Pemberian Triacontanol terhadap Produksi dan Viabilitas Benih Ketimun (Cucumis sativus L.) Widhi B, Agatha; Surahman, Memen; Purwoko, Bambang S.
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 28 No. 3 (2000): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

The objective of this experiment was to determine the effect of triacontanol on cucumber production and viability. A comletely randomized design was used, consisting two factors i.e. concentration and time of application. Concentration consists of 5 levels: 0, 0.01, 0.1, 1.0, and 10.0 mg/l while time of application consists of 3 leveles: 2 weeks after planting (W AP), 4 W AP, and 2 & 4 W AP. Concentration, time of application and interaction of the two factors were not significant on vegetative and reproductive variables but were significant on seed weight index, and seed variability. Concentration of O.O1 mg/l and application of 4 WAP gave the best effect on seed viability. (p.11) Key words: Triacontanol, Seed, Cucumber

Effect of Coating Materials and Storage Temperatures on Quality and Shelf Life of Papaya Fruit Purwoko, Bambang S.; Fitradesi, P.
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 28 No. 2 (2000): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

The objective of the research was to determine the effect of coating materials and storage temperatures in inhibiting the ripening process of papaya fruits. A two-factor factorial experiment was conducted. Replicates were three times and functioned as block. It consisted of coating material factor i.e. control, Semperfresh0 ,8% carnauba wax 6% and bee wax 6% and storage temperature factor, control room (27-31°C) and cool (18-20"C) temperatures. Observations consisted of weight loss, peel color development, appearance, total soluble solids, titratable acidity and vitamin C content. Result of the experiment showed that bee wax and carnauba wax inhibited weight loss, fruit softening, the increase of vitamin C, and the decline of appearance. Storage of fruits treated with carnauba wax at cool temperature had a shelf life of 19 days while control fruits stored at room temperature had a shelf life of 5.3 days. Keywords: Coating materials, Shelf life, Papaya

PENGARUH PERLAKUAN PASCA PANEN DAN SUHU SIMPAN TERHADAP DAYA SIMPAN DAN KUALITAS BUAH MANGGA (Mangifera indica L.) VARIETAS ARUMANIS Purwoko, Bambang S.; Magdalena, Fera Santi
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 27 No. 1 (1999): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

The objective of the experiment was to test the effectiveness of several postharvest treatments of mango at different storage temperatures. Mango cv. Arumanis at 80 % maturity was used in the experiment. A factorial experiment consisted of 2 factors was used. The two factors were storage temperature (24 - 25°C and 18 -19°C) and postharvest treatments (spermidine 1 mM; CaCl2 3 %, plastic wrapping, waxing, and control). Result of the experiment showed that plastic wrapping was the best in inhibiting weight loss, the increase of total soluble solid, ratio of TSS / acidity, the decrease of acidity. However; it also gave off-flavor. Storage at 18 -19°C was effective in inhibiting the increase of softening, total soluble solid, and the decrease of acidity

PENGARUH BEBERAPA PERLAKUAN PASCA PANEN DAN SUHU PENYIMPANAN TERHADAP KUALITAS DAN DAYA SIMPAN BUAH PISANG CAVENDISH (Musa (GRUP AAA, SUBGRUP Cavendish)) Purwoko, Bambang S.; Juniarti, Diah
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 26 No. 2 (1998): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

The objective of this research was to determine the effect of prestorage infiltration of CaCl2, infiltration of spermidine, plastic wrapping and waxing on the maintenance of banana shelflife and qualities at different storage temperatures. Prestorage infiltration of Cavendish banana (Musa Cavendishii) with CaCl2 inhibited fruit softening, the increase of sugar content in peel color index. Plastic wrapping could inhibit the increase of weight loss, pulp peel ratio, peel color index, and the decrease of appearance score. Treatment of fruit with spermidine infiltration store in cool temperature could maintain banana shelflife until 27.8 days or 8.1 days longer than control.

PENGARUH APLIKASI GA3 TERHADAP PEMBUNGAAN TANAMAN Anthurium andreanum cv. AVO CUBA Purwoko, Bambang S.; Sulistiyani, Dyah Sri; Gunawan, Livy W.
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 25 No. 3 (1997): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

The objective of the research was to determine the effect of GA3 application on the flowering of Anthurium andreanum cv. Avo Cuba. The experiment consisted of two factors namely dosage and frequency of application: once or twice with one half dosage each. The result showed that GA3 increased leaf area, length of flower stalk, and the number of flower produced, shortened the time of flower emergence and harvest date. GA3 did not influence flower size and vase life. The frequency of application had no effect on Anthurium flowering. There was no interaction of dosage and frequency of application. Dosage of GA3 at 10 mg per plant gave good effect on reproductive characteristics.

Co-Authors , Amisnaipa , Hariyadi , Hasnam , Satoto A. S. Abidin Achmad Surkati Agatha Widhi B Ahmad Surkati ALEX HARTANA Aris Munandar Bambang B. Santoso Buang Abdullah D. Wasgito Purnomo Diah Juniarti Dwi Guntoro Dyah Sri Sulistiyani Edi Santosa Fera Santi Magdalena Fitmawati Fitmawati HAJRIAL ASWIDINNOOR Hariyadi3, , I NYOMAN RAI I Wayan Budiastra I. Hanarida I. S. Dewi Ida H. Somantri Ince Raden Indrastuti A. Rumanti Irdika Mansur Iskandar M. Lapanjang Iswari S. Dewi Ketut Suryana Lady Lengkey Latifah K. Darusman Livy W. Gunawan Loyd E. Powell M A Chozin Maya Melati Memen Surahman Muhammad Syakir Munif Ghulamahdi Nurul Khumaida P. Fitradesi Pepi Nur Susilawati Priatna Sasmita R. Poerwanto Ramdan Hidayat Reny Herawati Roedhy Poerwanto Roedy Poerwanto S. Gunadi S. Sujiprihati Sakhidin Sakhidin Semin Semin Slamet Susanto Sri S. Harjadi Sri Wilarso Sri Wilarso Budi SRIANI SUJIPRIHATI Sudarsono Sudirman Yahya Suhirman, Suhirman Syamsiar, Syamsiar Tatiek K Suharsi Trikoesoemaningtyas Yeni Yudhiani Yoga Yuniadi Yusuf L. Limbongan

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