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Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)

jurnalagronomi
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Published by Institut Pertanian Bogor

ISSN : 20852916 EISSN : 23373652 DOI : -

Core Subject : Economy, Agriculture,

Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance

Aims and Scope Aims Indonesian of Journal Agronomy (Jurnal Agronomi Indonesia), the official journal of the Indonesian Society for Agronomy, publishes primary research paper, review article, policy analysis and research notes and preliminary results in all areas of agronomy. Manuscripts could be written either in English or in Indonesia. Scope Indonesian of Journal Agronomy (Jurnal Agronomi Indonesia) covers agronomy in broad sense including plant production, genetic and plant breeding, plant physiology, plant ecology, plant biotechnology, modeling, seed science and technology and weeds science on food, horticulture, plantation, and forage crops.

Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Agronomi dan Ilmu Tanaman

Articles 971 Documents

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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24831/jai.v40i2.6370

The development of biological products based on beneficial microorganisms could extend the range of options for maintaining the health and yield of crops. Rhizobacteria have been used for ‘promoting plant growth. The objectives of this research were to determine the best method of preplant seed treatment through seed conditioning with rhizobacteria which would be effective to improve yields and increase seed quality of hot pepper. This research was conducted in Agronomy Laboratory Haluoleo University and in the field of Wawotobi Seed Farm Centre of Southeast Sulawesi Province. Seed conditioning with rhizobacteria was effective in improving plant growth, yield and seed quality of hot pepper. However, the most effective treatment was the integration of sawdust seed matriconditioning with rhizobacteria Bacillus polymixaBG25. The seed treatment increased fruit total per plant to 51, compared with 26 in the control seeds. The treatment was also effective in increasing seed viability and vigor (germination percentage and vigor index) to 81% and 46% compared with 41% and 26% in the control seeds. Based on this experiment, rhizobacteria B. polymixaBG25 integrated with sawdust seed matriconditioning could be recommended as biofertilizer in improving yield and seed quality of hot pepper. Keywords: hot pepper, matriconditioning, rhizobacteria, sawdust, seed treatment

Metode Pengusangan Cepat untuk Pengujian Vigor Daya Simpan Benih Cabai (Capsicum annuumL.) Ekowahyuni, Luluk Prihastuti; Sutjahjo, Surjono Hadi; Sujiprihati, Sriani; Suhartanto, Mohamad Rahmad; Syukur, Muhamad
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 40 No. 2 (2012): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

The ability of seed to maintain seed quality during storage is called seed vigor. Accurate method for seed vigor testing of pepper seeds is necessary to accurately determine seed storability during seed distribution. The aim of this research was to determine the best accelerated aging method (AAM) of pepper seed. Freshly harvested seeds of Capsicum annuumL., IPB C9 genotype were used in this study. The experiment used randomized complete block design (RCBD) with three replications. The experimental treatments were seed vigor testing methods i.e. natural deterioration test at room temperature in controlled humidity (RH 90-95%), and four AAM (hot water 60 ºC, methanol 20%, ethanol 20%, and high temperature at 40 ºC). The best method was selected using analysis of variance, coeficient of variance, regresion dan t student analysis. AAM using 20% methanol at periods of 0, 2, 4, 6 and 8 hours was the best method of seed vigor testing for pepper seed. Keywords: accelerated aging, deterioration, ethanol, methanol, high temperature

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24831/jai.v40i2.6375

We investigated the effect of sector (position in canopy) on translocation and distribution of 13C-photosynthates in mangosteen trees and related the findings to previous analyses of fruit quality. Our experiment was conducted on three 25-year-old mangosteen trees. Tree canopies were divided into 9 sectors based on height (bottom, middle, top) and width (inner, center, outer). One branch from each sector was labeled with 13CO2 in December 2003. Immediately after labeling, 13C concentration in leaves from middle sectors was higher than that in leaves from other positions. 13C concentration in all leaves decreased rapidly for 24 h after 13C feeding, followed by a gradual decrease. In contrast, 13C concentration increased over time in the pericarp and aril of fruits. Translocation of 13C-photosynthates into fruit was high in Sectors 4 and 5, and in top positions (Sectors 7 to 9). At 96 h after 13C feeding, the highest distribution ratio of 13C-photosynthates was observed in stems, followed in descending order by pericarp, leaf, and aril. 13C distribution ratio in the aril was generally highest in fruits from inner and center positions. The relationship between partitioning of photosynthates and quality of mangosteen fruit, which differs among sectors, has been discussed. Keywords: fruiting positions, Garcinia mangostanaL., photosynthate partitioning, 13C, tree branches

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24831/jai.v40i2.6382

Black pod disease (BPD) of cacao caused by Phytophthora palmivora(Butl.) is one of the major diseases on cacao plantation worldwide. Endophytic fungi (EF), fungi that live asymptomatically inside healthy plants, were examined to study their potentials as biocontrol agent of the disease. Six of EF selected from 37 species (from 2843 isolates), isolated from healthy pods of cacao from Marena in Central Sulawesi were tested for their abilities to control BPD. Pods on living trees in the field were sprayed with each EF propagules. The inoculated pods were harvested two weeks later and subsequently inoculated with P. palmivora. Scoring of disease development was performed and quantified as area under disease progress curve (AUDPC). Latent period, infection rate and effectiveness were also recorded. In vitro growth inhibition of pathogen and induced plant defense mechanisms due to EF were also investigated. Xylariaceaeand Calocybe gambosatreatment generated the highest effectiveness control level, i.e. 38.8% and 33.8% respectively, followed by Resinicium friabileand Aschersoniatreatment, i.e. 17.4% dan 12.7% respectively. Pestalotiopsisand Fusariumwere not effective to control BPD. There was a strong connection between disease severity of BPD with the latent period of pathogen. Growth inhibition of pathogen and induced resistance of plant were partially responsible for disease suppression by Xylariaceae, C. gambosa, R. friabileand Aschersonia. Keywords: Calocybe gambosa, induced resistance, peroxidases, salicylic acid, Xylariaceae

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24831/jai.v40i2.6383

Temulawak (Curcuma xanthorrhizaRoxb.) belongs to the family Zingiberaceae, has been empirically used as herbal medicines. The research was aimed to evaluate three promising lines of Temulawak based on their high bioactive contents (xanthorrhizol and curcuminoid) and its in vitro bioactivity (antioxidant and toxicity), and to obtain information on agrobiophysic environmental condition which produced high bioactive compounds. The xanthorrhizol and curcuminoid contents were measured by HPLC. In vitro antioxidant and toxicity were determined by DPPH (1,1-diphenyl-2-picryl-hydrazyl) method and BSLT (Brine Shrimp Lethality Test). The result showed that promising line A produced the highest yield of bioactive and bioactivity, i.e. 0.157 and 0.056 g plant-1of xanthorrizol and curcuminoid respectively. The IC50 of antioxidant activity was 65.09 mg L-1and LC50of toxicity was 69.05 mg L-1. In this study, Cipenjo had the best temulawak performance than two other locations. According to the agrobiophysic parameters, Cipenjo environmental condition was suitable for temulawak cultivation with temperature 28-34 ºC, rainfall ± 223.97 mm year-1 and sandy clay soil. Keywords: antioxidant, curcuminoid, promising lines, temulawak, xanthorrhizol

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) Mualim, Leo; Aziz, Sandra Arifin; Susanto, Slamet; Melati, Maya
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 40 No. 2 (2012): 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 | DOI: 10.24831/jai.v40i2.6385

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

Respon Agronomi Varietas Padi terhadap Periode Kekeringan pada Sistem Sawah Tubur, Herman Wafom; Chozin, Muhamad Achmad; Santosa, Edi; Junaedi, Ahmad
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 40 No. 3 (2012): Jurnal Agronomi Indonesia
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 identify the growth and production of rice varieties as responses to drought period in low land rice system. Rice plants were grown under plastic house in plots separated by massive walls. Drought periods were treated as main plots, i.e. water was supplied during 3, 6, and 9 weeks after rice transplanting, and control (cultivation without drought treatment). Rice varieties were used as sub plots, consisted of IR64 and Ciherang (low land improved varieties), IPB-3S (new plant type), Menthik Wangi (an aromatic local low land rice), Rokan (a hybrid rice), Way Apo Buru (amphibian type), Jatiluhur and Silugonggo (up land type). Our results showed that drought periods suppressed plant height, tiller number, spikelets length, weight of 1,000 grains, shoot dry weight and harvest index, and increased number of empty spikelets. Interaction between drought periods and rice varieties significantly affected productive tiller number, percentage of plants to flower, and grain weight per hill. Jatiluhur, Ciherang and Way Apo Buru still gave relatively high yields under drought stress indicated that those varieties were relatively tolerant to drought stress; Silugonggo and IPB-3S had medium tolerance to drought stress; IR64, Menthik Wangi and Rokan were the most sensitive varieties. Keywords: drought stress, drought tolerant, improved variety, local variety

Peran Hara N, P dan K pada Pertumbuhan dan Perkembangan Ratun Lima Genotipe Padi , Susilawati; Bambang Sapta Purwoko; Hajrial Aswidinnoor; Edi Santosa
Indonesian Journal of Agronomy Vol. 40 No. 3 (2012): Jurnal Agronomi Indonesia
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 roles of fertilizers application in improving rice ratoons. Statistical design used was a factorial randomized complete block design with three replications. The first factor was three levels of fertilizer rate (kg ha-1) i.e. 5 N + 27 P2O5; 45 N + 30 K2O; and 27 P2O5+30 K2O. The second factor was rice genotypes, i.e. Cimelati, Hipa-5 and Rokan varieties, and two lines of rice i.e. IPB106-7-47-DJ-1 and IPB106-F-8-1. The growth and production characters of main crops and ratoon were observed. The results showed that both genotypes and rates of fertilizer affected yield of ratoon. Following application of (kg ha-1) 45 N + 27 P2O5 three genotypes produced the highest ratoon, i.e. IPB106-7-47-DJ-1 and IPB106-F-8-1 lines and Rokan variety. Cimelati and Hipa-5 varieties produced higher number of ratoon with fertilizer rate (kg ha-1) 45 N + 30 K2O. Ratoon production of all genotypes ranged 38.1-56.6% of the main crop. This study clearly demonstrated that N, P and K fertilizer had important roles in increasing yield and yield components of rice ratoon. Keywords: fertilizer, productivity, rice genotypes, rice ratoon

Pengaruh Kandungan Cu dalam Air Irigasi terhadap Pertumbuhan dan Produksi Padi (Oryza sativa L.) Sulistyono, Eko; Rokhmah, Fatkhiyatur
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 40 No. 3 (2012): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

The research was conducted to investigate the effect of copper (Cu) levels in irrigation water on the growth and production of rice variety IR64. The experiment was arranged in randomized complete block design with six replications. The Cu treatments were: 0, 300, 600 and 900 mg Cu L-1of irrigation water. The results showed that Cu content significantly decreased rice growth and production. Copper level of 600 mg L-1 decreased plant height, tiller number and leaf number. Copper level of 300 mg L-1 decreased panicle length, number of grains per panicle, empty grain weight, 100 grains weight, milled grain weight, and shoot dry weight. This experiment implies that remediation treatments should be considered when Cu level in irrigation water was more than 300 mg Cu L-1. Copper level of 300 mg L-1 could be used as a critical level for rice screening for Cu tolerant varieties in the plant breeding program. Keywords: copper toxicity, low land rice, rice growth and production, water quality

Peanut Cultivar Differences in Yield Based on Source and Sink Characteristics Iskandar Lubis; Heni Purnamawati; Roedhy Poerwanto; , Yudiwanti; Ahmad Ghozi Mansyuri; Sri Astuti Rais
Indonesian Journal of Agronomy Vol. 40 No. 3 (2012): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

This research was conducted to determine peanut cultivar differences in sink and source sizes as represented by vegetative growth and yields. Two sets of experiments were conducted at Bogor Agricultural University farms, Sawah Baru and Cikarawang (06o33’, S, 106o45’E, 250 m altitude). Planting was conducted on June 12 and June 20, 2007 using 20 local and national cultivars in each location. Both experiments used randomized complete block design with three replications. Data were analyzed using correlation and regression analysis. Size of experimental unit was 1.6 m x 4.0 m, with planting density 125,000 plants ha-1. Urea, SP36 and KCl were applied at planting date in the rate of (kg ha-1) 45 N, 100 P2O5 and 50 K2O. Four stages of plant growth were studied: 25 days after planting (DAP); 6 weeks after planting (WAP); 10 WAP (pod filling) and 14 WAP (harvest). Five plants were sampled at 25 DAP, two plants at 6 WAP, 10 WAP and 14 WAP, and separated into leaves, stems, roots and pods. The average yield of two experimental stations showed that Biawak cultivar had the highest yield due to relatively higher aboveground dry weight (source), pod filling percentage and maximum number of gynophor+pods (potential sink). Jepara cultivar had the lowest yield due to low pod filling percentage and potential sink, although its source was considered to be in the medium category. Above ground dry weight at 6 and 10 WAP had close relation with Crop Growth Rate (CGR) during 25 DAP-6 WAP and 6-10 WAP, and the higher CGR during those periods were more related to leaf area index than to single leaf photosynthetic capacity. Keywords: crop growth rate, pod filling percentage, leaf area index, single leaf photosynthetic capacity

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Fatardho Zudri

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Fatardho Zudri

Contact Email fatardho@gmail.com

Phone -

Journal Mail Official jurnal.agronomi@yahoo.com

Editorial Address Jl. Meranti, Kampus IPB Dramaga, Bogor 16680

Location Kota bogor, Jawa barat INDONESIA

Abstract

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Contact Name
Fatardho Zudri

Contact Email
fatardho@gmail.com

Phone
-

Journal Mail Official
jurnal.agronomi@yahoo.com

Editorial Address
Jl. Meranti, Kampus IPB Dramaga, Bogor 16680

Location
Kota bogor,

Jawa barat

INDONESIA