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Pengaruh Pemberian Triacontanol terhadap Produksi dan Viabilitas Benih Ketimun (Cucumis sativus L.) Agatha Widhi B; Memen Surahman; Bambang S. Purwoko
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1252.055 KB) | DOI: 10.24831/jai.v28i3.1558

Abstract

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 Bambang S. Purwoko; P. Fitradesi
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (664.865 KB) | DOI: 10.24831/jai.v28i2.1568

Abstract

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 Bambang S. Purwoko; Fera Santi Magdalena
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1679.716 KB) | DOI: 10.24831/jai.v27i1.1581

Abstract

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)) Bambang S. Purwoko; Diah Juniarti
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (983.37 KB) | DOI: 10.24831/jai.v26i2.1590

Abstract

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 Bambang S. Purwoko; Dyah Sri Sulistiyani; Livy W. Gunawan
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (882.659 KB) | DOI: 10.24831/jai.v25i3.1607

Abstract

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.
PENGARUH KONSENTRASI DAN FREKUENSI PEMBERIAN PUPUK METALIK TERHADAP PERTUMBUHAN TANAMAN LADA PERDU (Piper nigrum) DI PEMBIBIT AN Bambang S. Purwoko; Yeni Yudhiani; Muhammad Syakir
Indonesian Journal of Agronomy Vol. 25 No. 2 (1997): Buletin Agronomi
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 (753.605 KB) | DOI: 10.24831/jai.v25i2.1611

Abstract

The objective of the experiment was to determine the best concentration and frequency of application of micronutrients (Metalik) to increase pepper plant growth in the nursery. Metalik was used as it contained several micronutrients. Thirteen treatments were arranged as follows: untreated plants as control and twelve other treatments were combinations of concentration (0.3, 0.6, 0.9, 1.2 ml Metalik/l water denoted as KO.3, KO.6, KO.9, and K1.2 respectively) and application frequency (once a week, once every two weeks, and once every four weeks denoted as Fl, F2, and F41respectively). The twelve treatments were: KO.3Fl, KO.3F2, KO.3F4, KO.6Fl, KO.6F2, KO.6F4, KO.9F1, KO.9F2, KO.9F4, Kl.2F1, Kl.2F2, and Kl.2F4. Plants used in the experiment originated: from secondary branch cuttings of Lampung Daun Lebar cultivar. A randomized complete blocked design was used. Experiment consisted of three replicates. Result of the experiment showed that foliar application of Metalik increased growth of pepper plants in the nursery. The best treatment was concentration of 0.3 ml Metalik/l water and application frequency of once every four weeks.
PENGARUH KONSENTRASI DAN LAMA PERLAKUAN PUTRESIN TERHADAP PERUBAHAN KUALITAS BUAH PISANG AMBON Bambang S. Purwoko; S. Gunadi
Indonesian Journal of Agronomy Vol. 23 No. 1 (1995): Buletin Agronomi
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 (1026.006 KB) | DOI: 10.24831/jai.v23i1.1621

Abstract

Polyamines have been reported to have a role in habiting senescene. Polyamine application inhibited fruit softening and extend fruit shelflife. The common polyamine included putrescine, spermidine, and spermine. The objective of the present study was to determine the effect of concentration and length putrescine application on some quality changes in banana. The result showed that putrescine had some effects on weight loss, inhibited fruit softening, and color development. However, the effect were not consistent. The best concentration and length of application could not determine. It was suggested that pressure infiltration was used for polyamine application
IDENTIFICATION AND ANALYSES OF SHORT CHAIN FATTY ACIDS IN APPLE SEED PARTS DURING STRATIFICATION Bambang S. Purwoko; Loyd E. Powell
Indonesian Journal of Agronomy Vol. 22 No. 2 (1994): Buletin Agronomi
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 (1470.518 KB) | DOI: 10.24831/jai.v22i2.1643

Abstract

Penelitian ini bertujuan untuk mengidentifikasi dan menganalisis perubahan kandungan asam lemak rantai pendek (ALRP) pada biji apel selama stratifikasi. Asam-asam heksanoat, oktanoat, nonanoat, dan dekanoat telah diidentifikasi dengan Gas-Kromatografi Mass- Spektrometri. Analisis rutin ALRP dengan Gas-Kromatografi menunjukkan bahwa kandungan ALRP tertinggi ditemukan pada membran nuselus. Konsentrasi ALRP pada kulit biji rendah dan setingkat dengan kandungan ALRP pada embrio. Asam heksanoat merupakan ALRP terbanyak pada semua bagian biji padahal asam ini dianggap inhibitor yang lemah. Kandungan asam nonanoat dan dekanoat jauh lebih kecil dan biasanya kurang dari 10-4 M Gambaran umum perubahan ALRP selama stratifikasi adalah menurun atau konstan dan kandungannya kurang dari 10 -3 M, terlalu kecil untuk menjadi inhibitor yang signifikan dalam mekanisme dormansi. Penurunan ALRP terjadi pada suhu 5 °C dan 2 °C, padahal hanya perlakuan 5 °C yang dapat  memecahkan dormansi biji apel. Dari studi ini, dapat disimpulkan bahwa perubahan kandungan ALRP selama stratifikasi tidak mendukung hipotesis bahwa ALRP berperan dalam dormansi biji apel.
HUBUNGAN ASAM LEMAK RANTAI PENDEK, STRATIFIKASI, DAN GIBERELIN PADA PERKECAMBAHAN EMBRIO APEL Bambang S. Purwoko; Loyd E. Powell
Indonesian Journal of Agronomy Vol. 22 No. 1 (1994): Buletin Agronomi
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 (1275.441 KB) | DOI: 10.24831/jai.v22i1.1646

Abstract

The objective of the present experiment was to determine the inhibitory properties of short chain fatty acids (SCFA) in apple embryo germination. The result showed that the SCFA inhibition on apple embryo germination was dependent on chain length and was in the millimolar range. No synergistic effect was observed when SCFA were applied simultaneously. The inhibition of SCFA was reversed by GA4+7. A higher concentration of SCFA was needed to inhibit embryo germination as the stratification progressed.
Pewarisan Sifat Toleransi Padi Sawah (Oryza sativa L) Terhadap Cekaman Suhu Rendah Yusuf L. Limbongan; Hajrial Aswidinnoor; Bambang S. Purwoko; , Trikoesoemaningtyas2
Indonesian Journal of Agronomy Vol. 36 No. 2 (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 (57.701 KB) | DOI: 10.24831/jai.v36i2.20482

Abstract

One of the definite successful of rice breeding programs for increasing yield and tolerance to environmental stress condition is selection method. Selection method will be effectively if it is supported by a perfect knowledge of genetics character inheritance. The objectives of this study is to investigate the information of inheritance pattern adapted of rice towards low temperature stress condition. The experiment was conducted in both Sesean rural area, Toraja regency, South Sulawesi on 1500 m above sea levels, an mean temperature 15 o C, type of soil is Podzolic and at Bogor Agriculture Institute. This experiment is done in January 2006 until July 2007. The result showed that tolerance parental grew well and higher yield than sensitive parental. There were no significant differences between F1 and F1 reciprocal for all characters. Tolerance parental is more superior than sensitive parental in all characters have been tested. Mean of F1 generation is in between tolerance parental and sensitive parental. BCP1 has spheres wider than parentals and F1 generation, but BCP2 smaller than parentals and F1 generation. F2 generation is spheres wider than the average of both parentals. The m [d] [h] genetic model is the most suitable for all characters. Except, date of flowering and weight of filled rice where appropriate models is m [d] [h] [l]. Broad sense and narrow sense heritability is range between low to high. Based on the degree of dominant, additive effect is higher than dominant effect. The negative F value reached on date of flowering and fur lenght; and others characters, F value is positive.