Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
ISSN : 20852916     EISSN : 23373652
urnal Agronomi Indonesia, sebelumnya bernama Buletin Agronomi, terbit sejak 1962, diterbitkan oleh Departemen Agronomi dan Hortikultura Fakultas Pertanian, Institut Pertanian Bogor dan Perhimpunan Agronomi Indonesia (PERAGI). Jurnal Agronomi Indonesia merupakan media untuk publikasi tulisan asli yang berkaitan dengan budidaya tanaman secara luas, dalam Bahasa Indonesia maupun Bahasa Inggris. Naskah dapat berupa: hasil-hasil penelitian mutakhir (paling lama 5 tahun yang lalu), ulasan (review)singkat, analisis kebijakan atau catatan penelitian (research note) singkat mengenai teknik percobaan, alat, pengamatan, hasil awal percobaan (preliminary result).
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Kompetisi Tanaman Jagung dan Ubikayu dalam Sistem Tumpang Sari Suwarto, ,; Yahya, Sudirman; Handoko, ,; Chozin, Muhammad Ahmad
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 33, No 2 (2005): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

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Abstract

Intercropping system of maize and cassava has been practiced widely by Indonesian farmer on dry land. Competition between the plant will happen in the system. Field experiment to understand about the competition has been conducted.   Field experiment of growing maize (Arjuna, Pioneer 4, and Cargill 9 in various planting densities) and cassava (Adira 1) was conducted for monoculture and intercropped plants.  Intercropped cassava increased intraspesific competition of maize.  Yield of maize variety of Arjuna, Pioner 4, and Cargill 9 decreased by about 9.7%, 6.7%, and 16.9% respectively. Maize also reduced growth and yield of cassava. When intercropped with Arjuna, pioner 4, and Cargill 9 at the highest density (80 000 plants ha-1), yield of cassava tuber decreased by about 40.6%, 43% and 64.3%, respectively. However, the intercropping still gave a better land productivity, where land equivalent ratio (LER) was larger than 1.0.    Key words: intercropping, competition, maize, cassava    
Perbanyakan Ruskus (Ruscus hypophyllum L.) secara In Vitro Purwito, Agus; Muklisa, Prima; Maharijaya, Awang
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 33, No 2 (2005): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

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Abstract

These experiments were aimed to obtain optimum medium for micropropagation of Ruscus. There were two experiments consist of in vitro shoots proliferation, shoot elongation and rooting.  The experiment of shoot proliferation performed by inducing adventitious shoots from explant in the Murashige and Skoog (1962)(MS) basal medium supplemented with combination of plant growth regulators BAP (0.0, 0.5, 1.0, 2.0, 4.0 and 6.0 mg/l) and IAA (0.0, 0.1, 0.2 and 0.4 mg/l). The elongation and rooting of plantlets were induced in the different concentration of the MS basal medium (0.5, 1.0 and 2.0 strength) combined with IBA (0.0, 1.0, 2.0, 3.0 and 4.0 mg/l).  Both experiments were arranged as completely randomized design with 15 replications. Adventitious shoots were produced in all medium supplemented with BAP with or without IAA. However MS medium supplemented with BAP 1 mg/l or 2 mg/l combined with IAA 0.2 mg/l were the best.  The number of adventitious shoots in these medium were 9.2 and 9.4 shoots after 8 weeks cultured respectively.  Increasing concentration of BAP more than 4 mg/l decreased number and size of adventitious shoots.  The plantlets produced in the proliferation medium were then transferring to the next treatments for elongation and rooting.  The best medium for elongation and rooting were medium with half strength of MS with or without IBA. Acclimatization conducted by transferring the rooted plantlets on the medium containing sterilized soil and rice husk charcoal (1:1).  After 4 weeks acclimatization, 60-100 percent of plantlets were survived and growth, depend on treatments.   Key words: Acclimatization, adventitious shoot, micropropagation, rooting, Ruscus hypophyllum L.
RESEARCH NOTE Floral Bud Length as Morphological Predictor for Microspore Developmental Stage in Sturt’s Desert Pea (Swainsona formosa) Zulkarnain, ,
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 33, No 2 (2005): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

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Abstract

This work was conducted to establish the relationship between microspore developmental stage and length of the floral bud in glasshouse-grown Sturt´s desert pea, a native Australian legume.  The stages of microspore development were segregated into tetrad, early-uninucleate, mid-uninucleate and late-uninucleate.  The results showed that the stage of microspore development was highly dependent on the length of floral bud.  The tetrad stage lasted longer than early-, mid- or late-uninucleate stages.  The attempted induction of androgenesis in Sturt´s desert pea using anthers from floral buds with similar size, as in the present work, was unsuccessful.  However, our work showed that the floral bud length can be used as a reliable predictor of microspore developmental stage in Sturt´s desert pea.   Key words: Sturt´s desert pea, Swainsona formosa, androgenesis, legume
REVIEW Rekayasa Genetika untuk Mengatasi Masalah-masalah Pascapanen Efendi, Darda
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 33, No 2 (2005): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

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Abstract

  Flavr Savr tomato is a transgenic tomato which is transformed using Polyglacturonase gene in antisense orientation. This is the first whole food product of biotechnology that reachs the market, but unfortunately it does not succeed.   Ethylene is thought to act as a natural triggering mechanism for fruit ripening and senescence.  Lowering the production of endogenous ethylene from fruit should delay fruit ripening and senescence. Several ways to control ethylene biosynthesis are: inactivation of the gene encoding ACC synthase, ACC oxidase, metabolism of SAM so that ACC is not produced, or metabolism of ACC before it can be converted to ethylene.  Effect of ethylene can also be blocked by blocking the perception of ethylene by specific tissues. Key words: Ethylene, ACC synthase, ACC oxidase, SAM hydrolase, genetic  transformation.
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 : Bogor Agricultural University

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Abstract

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
Pengaruh Pupuk Kandang Ayam dan Pupuk Hijau Calopogonium mucunoides Terhadap Pertumbuhan dan Produksi Kedelai Panen Muda yang Dibudidayakan Secara Organik Melati, Maya; Andriyani, Wisdiyastuti
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 33, No 2 (2005): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

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Abstract

The objective of the study was to investigate the effect of chicken manure and green manure Calopogonium mucunoides on the growth and production of vegetable soybean under organic farming system. The study was conducted at IPB research station, Leuwikopo, Darmaga, Bogor from June 2004 to March 2005.  The experiment used split plot design with chicken manure dosages (0 and 10 ton/ha) as main plots and seed of green manure dosages (0, 7.5, 15, and 30 ton/ha) as sub plots. Chicken manure significantly resulted in better agronomic characters compared to that of without chicken manure. Green manure significantly increased plant height on 4 to 7 weeks after planting (WAP), number of leaves on 6 WAP. Interaction between chicken manure and green manure significantly influenced fresh weight of root nodule and 100 seeds. Fresh weight of 100 seeds was the highest with the application of either 10 ton chicken manure/ha or 15 kg seed of green manure/ha. Except plant height and number of leaves, generally growth and production of soybean under organic farming system were better than those under conventional farming   Key words: Vegetable soybean, organic farming, chicken manure, green manure, Calopogonium mucunoides
Pengaruh Sarcotesta dan Pengeringan Benih serta Perlakuan Pendahuluan terhadap Viabilitas dan Dormansi Benih Pepaya (Carica papaya L.) Sari, Maryati; Murniati, Endang; Suhartanto, M. Rahmad
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 33, No 2 (2005): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

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Abstract

Improved seed longevity by seed drying and application of  phenolic compound as natural antioxidant is the topic of this research. In many cases the sensitivity of papaya seed to drying is being the limit factor because of desiccation injury or induced dormancy. There is phenolic compound on the sarcotesta surrounding papaya seed which may act either as antioxidant or as germination inhibitor. The effect of sarcotesta and seed drying on viabillity and dormancy was studied. The experiment was conducted in July - October 2004, located at Bogor Agricultural University, used papaya seed (IPB-1) which harvested from Pusat Kajian Buah Tropika (PKBT) farm in Bogor. In the last study, seed was dried in the absence and presence of sarcotesta until 11-12% and 6-7% moisture content (mc). After drying, seed viability was measured by tetrazolium test.  The hardness of seed was also measured using penetrometer.  Seed germination was tested by (1) soaking on 10% KNO3, (2) scarification on water using  electrical stirrer, (3) soaking on 10% KNO3  with scarification using electrical stirrer, (4) scarification on the  hot water (50oC) followed by soaking on 10% KNO3.   In the absence of sarcotesta, the viability of 6-7% mc seed was as high as 11-12% mc seed. There was neither viability reduction nor induced dormancy. Whereas in the presence of sarcotesta, there was also no viability reduction but the dormancy was induced. The dormancy of seed with 11-12% mc was longer than seed with 6-7% mc. Scanning electron microscopy images showed that sarcotesta was removed by cleaning treatment before drying. On the contrary, sarcotesta was not completely removed from the seed and became more impermeable when cleaning was done after drying.This research can not suggest the most effective  pre-treatment to break the dormancy. The mechanism of the dormancy is discused.   Key words: Carica papaya L., seed drying, sarcotesta, seed viability, seed dormancy
Perbanyakan Tunas Mikro Pisang Rajabulu (Musa AAB Group) dengan Eksplan Anakan dan Jantung Ernawati, Andri; Purwito, Agus; Pasaribu, J. M.
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 33, No 2 (2005): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

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Abstract

Research on micropropagation of banana cv. Rajabulu (Musa AAB Group) was undertaken.  On initiation stage,  sucker  was best used as explant during rainy season on solid medium containing 7 mg/l BAP + 3 mg/l IAA and average microshoots was 7 shoots/bottle. While  inflorescence as explant was best for initiation during dry season on solid medium containing 9 mg/l BAP + 1 mg/l IAA and average microshoots was 18 shoots/bottle.  On multiplication stage, sucker produced microshoot on medium containing 4.5 mg/l BAP + 1.0 mg/l kinetin (2.9 shoots).  While inflorescense produced microshoot on medium containing 6.0 mg/l IAA + 2.0 mg/l BAP (2.4 shoots).  Acclimatization of plantlets produced from sucker and inflorescense was best on medium of compost 75% + soil 25%.   Key words: micropropagation, sucker, inflorescense,  banana Rajabulu  (Musa AAB Group)

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