Articles

Red Guava Leaf Harvesting Impact on Flavonoid Optimation in Different Growth Phases AZIZ, SANDRA ARIFIN; GHULAMAHDI, MUNIF
HAYATI Journal of Biosciences Vol 18, No 2 (2011): June 2011
Publisher : Bogor Agricultural University, Indonesia

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Abstract

Harvesting process is a critical time to identify the quality of raw material for traditional medicine. The time and harvesting techniques, drying process after harvesting, and processing to make the simplicia, are the crucial role to make the good quality of the natural product. On the other hand, there is a lack of general understanding and appreciation about the processes involved in governing shoot and tree growth and development, i.e. red guava.  The research objective was to evaluate the influence of leaf harvesting and growth phases on red guava for flavonoid production as antioxidant. Randomized factorial block design in time were laid out with two factors and followed by Duncan’s multiple range test. The treatments were the amount of leaf  harvested on tertiary branches (0, 25, 50, and 100%) and growth phases of the plant (vegetative and generative). Leaf harvesting 25% on tertiary branches significantly increased the leaf number (766.3 tree-1) and the number of new quarternary branches, decreasing leaf area index (LAI) and leaf dry weight at the end of the experiment (22 weeks of observation/WO).  The highest leaf dry weight (156.94 g tree-1) and LAI (0.47) was found in harvesting 25% tertiary branches.  Harvesting 100% leaf on tertiary branches in vegetative phase significantly produced the lowest flavonoid production (7.82 g tree-1). The result suggested that flavonoid production from red guava leaves should be done by harvesting 50% leaf on tertiary branches in generative phase can be used to produce the highest flavonoid (89.90 g tree-1).
STUDI BEBERAPA KOMPOSISI MEDIUM TUMBUH TANAMAN PENGGANTI TANAH DENGAN MEMANFAATKAN KULIT KAYU, KULIT KACANG TANAH, DAN SABUT KELAPA YANG DIBER! CENDAWAN Trichodenna Sp Anggraeni, Lina; Aziz, Sandra Arifin; Gunawan, Agustin Wydia
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 21, No 2 (1993): Buletin Agronomi
Publisher : Bogor Agricultural University

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Abstract

Bark, peanut shells and coconut husk were evaluated for their suitability as growth media for container plants with Trichoderma sp. as the decomposer and Marigold (Tagetes erecta L.) as plant indicator. Treatments were composition of volumes ratio of bark - peanut shells coconut husk: 1 - 2 - 3 (M1), 2 - 2 - 3 (M2), 1 - 4 - 3 (M3), 1 - 2 - 6 (M4), 2 - 4 -3 (M5), 1 - 1 - 3 (M6), 1 - 4 - 6 (M7), and soil - sand - compost; 1 - 1 - 1 (M0) as control. Trichoderma sp..assisted the decomposition process of bark, peanut shells, and coconut husk with C/N ratio in the end of experiment ± 20. The growth and flowering of Tagetes sp. In the composition of bark, peanut shells, and coconut husk in general similar with control up to 10 weeks after planting (WAP). The best bark - peanut shells - coconut husks composition was 1 - 2 - 3, 2 - 4 - 3 was worst for Tagetes sp. growth and diameter of flowers. The highest sum of flowers was found on 1 - 4 - 6.
Protein and Anthocyanin Production of Waterleaf Shoots (Ta linum triangulare (Jacq.) Willd) at Different Levels of Nitrogen+Potassium and Harvest Intervals Susant, Hilda; Aziz, Sandra Arifin; Melati, Maya; Susanto, Slamet
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 39, No 2 (2011): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

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Abstract

The experiment was conducted at IPB Experimental Station, Leuwikopo, Dramaga, Bogor, from November 2009 until February 2010 to study the effect of different  nitrogen+potassium rates and harvest intervals on protein and anthocyanin production of waterleaf shoot (Talinum triangulare (Jacq.) Willd). A randomized complete block design was used with three replications of two factors, which were  four N+K  dosages (50 kg urea + 50 kg ha-1 KCl, 50 kg urea + 100 kg ha-1 KCl, 100 kg urea + 50 kg ha-1 KCl, 100 kg urea + 100 kg ha-1 KCl) and three harvest intervals (30, 15, and 10 days).  The results showed that interaction of 100 kg urea + 100 kg ha-1 KCl and 15-day harvest interval produced the highest content (8.29 mg g-1 fresh weight) and production (4.72 g plant-1) of protein.  The interaction of N+K dosages and harvest intervals were not significant in affecting the anthocyanin content.  The highest production of anthocyanin was produced by single treatment of 100 kg urea + 100 kg ha-1 KCl (152.23 µmol plant-1) and 10 days harvest interval (165.47 µmol plant-1), respectively.  Leaf protein levels negatively correlated with anthocyanin content.   Keywords: anthocyanin, fertilizer, harvest interval, protein, Talinum triangulare  
Repellent Plants and Seed Treatments for Organic Vegetable Soybean Production Aziz, Sandra Arifin; Pardiyanto, Agus Yudhi; Sinaga, Meity Suradji
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 39, No 1 (2011): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

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Abstract

The research was conducted to study the effect of repellent plants and seed treatments on growth and  production of organically grown vegetable soybean.  The experiment was carried out at Cikarawang Research Station, Bogor, from September 2005 to May 2006. The organic experiment was arranged in a split plot design using four species of companion plants as repellent plants, i.e. Tagetes  erecta, Cymbopogon nardus, Ocimum gratissimum,  Tephrosia  vogelii, and without repellent plants as the main plot, and seed treatments i.e. galangal oil, Pseudomonas  fl  uorescens, and without seed treatments as sub plot using 3 replications and conventional system (using pesticides) as control.  Plants grown under conventional system had a greater fresh pod weight (6.7 kg. 10 m-2) than those in organic system (4.80-5.79 kg. 10 m-2), a lower insect infestation (19.17, 22.92 and 32.50%) and disease prevalence (9.17, 11.42 and 14.42%), at 6, 7 and 8 Week After Planting (WAP) respectively, than the organic system.  In the organic experiment, the use of O. gratissimum as repellent plants resulted in a signifi  cantly lowest empty pod per plant (0.79 g). T. erecta and O. gratissimum without seed treatment, P. fluorescens without repellent plants, and T.  vogelii  with galangal oil seed treatment has the signifi  cant lowest insect infestation at 6 WAP of 20.67, 23.00, 26.67 and 27.33%, respectively.  An organic system using repellent plants had a significantly lower insect infestation at 8 WAP (35.67-40.33%, O. gratissimum being the lowest) than without repellent plants (50.56%). Seed treatments on organic system had the lower disease prevalence at 8 WAP (33.87% on P. fluorescens and 35.47% on galangal oil) than without seed treatments (37.73%). Number of root nodules (11.6-16.7 to 7.8) and root nodules dry weight (0.068-0.101 to 0.040 g) of the organic system were greater than the conventional system.  Soybean without repellent plants had a greater number of harvestable plants (137.3), but it was fewer than the conventional system (158.3).    Keywords: disease and pest control, seed treatments, organic vegetable soybean
Aplikasi Pupuk Inorganik Meningkatkan Produksi dan Kualitas Pucuk Kolesom pada Musim Hujan Mualim, Leo; Aziz, Sandra Arifin; Susanto, Slamet; Melati, Maya
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 40, No 2 (2012): JURNAL AGONOMI INDONESIA
Publisher : Bogor Agricultural University

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Abstract

using complete randomized block design with three replications. The means from each plot were compared by using t-student’s test. Application of inorganic fertilizer resulted in a higher shoot production (at 6 week after planting) and a better quality leaves compared to other treatment. This research revealed that high quality waterleaf can be indicated by some criterias, i.e., higher content of primary metabolites (sugar and protein), secondary metabolites (phenolic, flavonoid, and chlorophyll), and antioxidant capacity (low IC50 value). Therefore, application of inorganic fertilizer in wet season is recommended to produce high yields and high quality water leaf. Keywords: sugar, protein, phenolic, flavonoid, DPPH
CARA PENANAMAN SETEK BULUH BAMBU BETUNG, ANDONG, TEMEN, HITAM, DAN TALI Aziz, Sandra Arifin
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 25, No 2 (1997): Buletin Agronomi
Publisher : Bogor Agricultural University

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Experiments of the planting method of two nodes culm cuttings horizontally and one nodeculm vertically were carried out on Dendrocalamus asper, Gigantochloa pseudoarundinacea, and G. atter (Experiment I), and D. asper, G. atroviolacea, and G. opus (Experiment 2). FactorialRandomized Block Design were used, with the first factor: planting method of two nodes culmcuttings horizontally and one node culm cuttings vertically and bamboo species as the second factor. All combinations were replicated four times. Two nodes culm cuttings planted horizontally was better than one node culm cuttings planted vertically. Gigantochloa atter had the best growth percentage (60 %) and followed by G. pseudoarundinacea 56 %, D. asper 52 %, G. afroviolacea and G. apus < 10 %. G. apus could not be propagated vertically. Vertical planting with one node in the dry season is not advisable.
Kajian Pemupukan NPK dan Jarak Tanam pada Produksi Antosianin Daun Kolesom Mualim, Leo; Aziz, Sandra Arifin; Melati, Maya
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 37, No 1 (2009): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

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The effects of NPK fertilization and plant spacing on leaf anthocyanin production of Talinum triangulare (Jacq.) Willd. were studied. A factorial experiment was used to study the combination of two factors i.e. NPK fertilization (no fertilization, NPK, NP, NK, and PK) and plant spacing (100 cm x 45 cm, 100 cm x 60 cm, 100 cm x 75 cm). These combinations were arranged in randomized block design, with three replications. The result showed that there was no effect of plant spacing and interaction between two factors. Application of NP (minus K) fertilizer gave the lowest value for almost all parameter except shoot/root ratio. This result suggested that fertilization played significant role in increasing anthocyanin production and the limiting factor was potassium.   Key words: Talinum triangulare, NPK  fertilization, anthocyanin production
Interaksi Antara Jumlah Nitrogen Dan Cara Panen pada Pertumbuhan dan Persentase Minyak Nilam yang Dihasilkan pada Panen Pertama Daryanto, Stefani; Aziz, Sandra Arifin
Jurnal Ilmu Pertanian Indonesia Vol 12, No 3 (2007): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Patchouli oil is one of major components in perfumery industries as well as incense. Its smell is heavy and strong due to the presence of its major component called patchoulol or patchouli alcohol. However, the production has not stabilized yet because of several factors including cultivation. Experiment was conducted from November 1999-May 2000. Patchouli cuttings were grown in randomized complete block design with four replications. Nitrogen rates for this experiment were 0, 45, 90, and 135 kg ha-1 and three harvesting methods, which were three pairs of youngest leaves, 20 em from the tip and by leaving 20 em stubble from ground. Plant height and number of branches continued to increase significantly linear at higher N rates. There was significant interaction between N rate and harvesting method on wet and dry harvest mass. Effect of N on composite percentage differed for each harvesting method. The yield from three youngest leaves was higher than harvesting 20 em from the tip and leaving 20 em stubble from the ground for 45, 90, and 135 kg ha-1 respectively. Keywords: patchouli oil, nitrogen level, harvesting method
Pengaruh Kombinasi Zat Pengatur Tumbuh BAP dan IAA terhadap Pertumbuhan dan Perkembangan Tanaman Daun Dewa (Gynura procumbens (Back)) dalam Kultur in Vitro Aziz, Sandra Arifin; Dinarti, Diny
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 32, No 3 (2004): Buletin Agronomi
Publisher : Bogor Agricultural University

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Gynura procumbens (Back) has been used for traditional medical treatment in Indonesia. Micropropagation. one of propagation methods, becomes an effective method in propagating the G. p.rocumbens (Back). The in vitro research using The group Randomize Block Design was conducted to study the growth and development of G. procumbens (Back) explant by applying combinations of BAP ( 0, /,2, and 3 ppm) and IAA (0, 0.5, and / ppm) in the Murashige and Skoog (MS) medium. The results showed combination of BAP 3 ppm and IAA 0.5 ppm was the optimum combination for the shoot multiplication, which produced 85.4 shoots per bottle. BAP 3 ppm combined with / ppm of lAA resulted in 100 % callussed culture with the largest diameter. Key words: Gynura u.rocumbens (Back), BAP, IAA, in Vitro
KEBERHASILAN PINDAH TANAM SETEK CABANG BAMBU AMPEL HIJAU (Bambusa vulgaris) DARI KULTUR AIR KELAPA Aziz, Sandra Arifin
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 25, No 3 (1997): Buletin Agronomi
Publisher : Bogor Agricultural University

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Abstract

An experiment of transplanting one and two nodes of green Bambusa vulgaris branch cutting from water culture the field was carried out with the application of chicken manure 0.0, 0.2, 0.4, 0.6, and 0.8 kg/plantlet, with based fertilizer Urea, TSP, and KCl 0.50, 0.50, and 0.50 kg/plantlet, respectively. Split plot design was used, with chicken manure as main plot and number of nodes as sub plot. All the combination were replicated thrice. Chicken manure 0.4 kg and Urea 0.50, TSP 0.25 and KCl 0.50 kg/plantlet is relatively needed to transplant green Bambusa vulgaris branch cutting from water culture to the field. Plantlet with two nodes had better growth ability than one nodes on 12 and 14 weeks after transplanting, although no significant differences observed at the initial and the end of the experiment.