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Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
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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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Indonesia, Jurnal Agronomi ( Bogor Agricultural University, Indonesia )

Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 46, No 3 (2018): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy

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Daftar Isi

Indonesia, Jurnal Agronomi ( Bogor Agricultural University, Indonesia )

Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 46, No 3 (2018): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy

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Abstract

Daftar Isi

Pengelompokan Klon-Klon Ubi Jalar Berdasarkan Analisis Gerombol, Komponen Utama dan Biplot dari Karakter Morfologi

Hetharie, Helen ( Fakultas Pertanian Universitas Pattimura ) , Raharjo, Simon Hadi Teguh, Jambormias, dan Edizon

Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 46, No 3 (2018): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy

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Abstract

ABSTRACTSweet potato is a food crop with high genetic and phenotypic diversities. The objective of this study was to cluster sweet potato clones based on their morphological characters. This research used descriptive method using 25 morphological characters on 28 sweet potato clones and clustered using dice coefficient, principal component analysis and biplot analysis. The results showed that the clones were grouped into two clusters and 14 sub-clusters. Three sub-clusters had high similarity coefficients, i.e., 0.68-0.96, one clone was eliminated, and 11 sub-clusters had a low similarity, i.e., 0.41-0.52. The principal component analysis showed 14 of 25 morphological characters  determined the diversity in 27 sweet potato clones with cumulative variance of 70.79%. Biplot analysis showed that 12 characters contributed to cumulative variance of 61.3%. Twelve morphological characters had weak contribution on the characteristics of the clones in quadrant I; meanwhile, characteristics of  clones in quadrant II were orange, yellow and white tuber flesh, in quadrant III was dark purple tuber flesh, and in quadrant IV were purple tuber flesh and cortex. Result of the grouping analysis identified clones that were closely related and those distantly related for improvement purposes.Keywords: Ipomoea batatas, cumulative variance, Maluku province, morphology, relationship

Uji Beberapa Konsentrasi Bakteri Bacillus sp. Endofit untuk Meningkatkan Pertumbuhan Bibit Kakao (Theobroma cacao L.)

Puspita, Fifi, Saputra, Sukemi Indra, Merini, dan Jenny

Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 46, No 3 (2018): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy

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Abstract

ABSTRACTDevelopment of cocoa (Theobroma cacao L.) requires high-quality seeds. Adding growth substance from Bacillus sp. endophytes is expected to increase the growth of cocoa seedlings. The purpose of this research was to evaluate the ability of Bacillus sp. endophytes to produce Indole Acetic Acid (IAA) hormone, evaluate the effects of Bacillus sp. endophytes application on growth of cocoa seedling, and obtain the best concentration to increase growth of cocoa seedling. The experiments were conducted in the laboratory and in the field from June to October 2015. The study was conducted in two stages: in vitro and in vivo.The first experiment tested the ability of Bacillus sp. endophytes to produce IAA using tryptophan enriched picovskaya liquid medium and non-enriched tryptophan. The results from the first experiment showed that all Bacillus sp. endophytes produce IAA hormones. The second experiment tested the concentrations of Bacillus sp. endophytes to improve the growth of cocoa seedlings. The experiment was conducted using a completely randomized design consisting of 5 treatments and 4 replications, i.e., without treatment of Bacillus sp., and concentrations of 1011, 1012, 1013, and 1014 cfu/mL. The parameters observed were the number of bacterial colonies of Bacillus sp. endophytes, cocoa seed height, stem diameter, number of leaves and planting area of 4 month cocoa seedlings. The results from the second experiment showed that all concentrations of Bacillus sp. endophytes increase the growth of cocoa seedlings. The concentration of 1011 cfu/mL produced more colony in planting medium, increased height, stem diameter, leaf number and leaf area in cocoa seedlings.Keywords: Indole Acetic Acid, in vitro and in vivo

Yield Stability of Soybean Genotypes in Tropical Environments based on Genotype and Genotype-by-Environment Biplot

Krisnawati, Ayda ( Balai Penelitian Tanaman Aneka Kacang dan Umbi (Indonesian Legume and Tuber Crops Research Institute / ILETRI) ) , Adie, and Mochammad Muchlish ( Balai Penelitian Tanaman Aneka Kacang dan Umbi (Indonesian Legume and Tuber Crops Research Institute / ILETRI) )

Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 46, No 3 (2018): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy

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Abstract

ABSTRACTGenotype × environment interaction is universal phenomenon when different genotypes are tested in a number of environments. The objective of this experiment was to determine the seed yield stability of soybean genotypes. Seven soybean genotypes and two check cultivars were evaluated at eight soybean production centers during the dry season 2015. Stability analysis on seed yield was based on the GGE biplot method. The combined analysis showed that yield and yield components were significantly affected by genotype (G), environments (E), and genotype × environment interaction (GEI), except for number of filled pods. The highest yield was G6 (3.07 ton ha-1), followed by G7 (2.93 ton ha-1). The “which-won-where” polygon mapping resulted two mega-environments. The best genotype for the first mega-environment was G1 (G511H/Anjasmoro//Anjasmoro-2-8) at E5 (Pasuruan2); and the second one was G6 (G511 H/Anj//Anj///Anj////Anjs-6-7) at E1 (Nganjuk), E2 (Mojokerto), E3 (Blitar), E4 (Pasuruan1), E6 (Jembrana), E7 (Tabanan), and E8 (Central Lombok). The G7 (G511 H/Anjasmoro-1-4-2) was closest to ideal genotype as indicated by relatively stable and produced high yield across environments. The analysis of multi-environment trials data using GGE is useful for determining mega-environment analysis and stability of genotype which focusing on overall performance to identify superior genotypes.Keywords: GE interaction, GGE biplot, Glycine max, seed yield

Karakteristik Buah Melon (Cucumis melo L.) pada Lima Stadia Kematangan

Huda, Amalia Nurul ( Plant Breeding and Biotechnology, Faculty of Agriculture, Bogor Agricultural University Graduate School ) , Suwarno, Willy Bayuardi ( Department of Agronomy and Horticulture, Faculty of Agriculture Bogor Agricultural University ) , Maharijaya, dan Awang

Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 46, No 3 (2018): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy

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Abstract

ABSTRACT    Melon breeding for fruit quality improvement is important to produce new varieties that meet consumers’ demand. The aim of this study was to elucidate the fruit characteristics of melon at five different maturity stages, involving several genotypes belonging to two cultivar groups: reticulatus and inodorus. The experiments were conducted in three planting seasons: (1) January-March 2015 (13 genotypes), (2) December 2015-February 2016 (56 genotypes), (3) February-May 2016 (9 genotypes). These trials were conducted at the Tajur II experimental station of IPB, Bogor, and each trial was arranged in a single factor randomized complete block design with three blocks. Maturity stages was determined based on fruit rind color and net coverage, and their effects on fruit quality were studied using combined analyses over seasons. Maturity stage significantly affected the fruit length, fruit diameter, flesh thickness, fruit weight, and sugar content. The average weight of the fruits at maturity stage 4 (838.90 g) and 5 (931.79 g) was significantly greater than that of stage 1 (584.42 g). The sugar content increased from maturity stage 2 (5.51 oBrix) to 3 (6.13 oBrix) and to 5 (8.18 oBrix). Fruit weight significantly correlated with fruit length (r = 0.53), fruit diameter (r = 0.85), fruit rind thickness (r = 0.33), and flesh thickness (r = 0.63). Maturity stages affected the quality of melon fruits, and therefore the determination of appropriate harvesting criteria is important in melon cultivations.Keywords: cantalupensis, correlation, inodorus, fruit quality, skin colour

Komposisi Media Pertumbuhan Protokorm Sebelum Perlakuan Kolkisin untuk Meningkatkan Poliploidi pada Phalaenopsis amabilis (L.) Blume

Putri, Astrid Aditya ( Departemen Agronomi dan Hortikultura Faperta-IPB ) , Sukma, Dewi, Aziz, Sandra Arifin, Syukur, dan Muhamad

Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 46, No 3 (2018): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy

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Abstract

ABSTRACTPolyploidy induction in Phalaenopsis amabilis is one of the methods to increase plant genetic diversity. A highly meristematic condition of protocorm induced by cytokinines may improve the success rate of polyploidy induction. This experiment was aimed to study the effect of Benzylaminopurine (BAP), Thidiazuron (TDZ) and coconut water (CW) in a half concentration of Murashige & Skoog (MS) medium before colchicine treatment on growth, multiplication and the success rate of polyploidy induction on Phalaenopsis amabilis protocorm. The experiment used completely randomized  design with one factor, medium treatment (15% of CW); 0.51 mg L-1 BAP; 0.50 mg L-1 TDZ; 15% CW + 0.51 mg L-1 BAP; 15% CW + 0.50 mg L-1 TDZ). Each treatment consisted of three replications with five culture bottles of protocorm for each replication and ten protocorms per bottle. The protocorms were incubated for eight weeks in the medium before treated with 50 mg L-1 of colchicine for ten days. The results showed that 15% CW, 15% CW + 0.51 mg L-1 BAP or 0.5 mg L-1 TDZ gave the highest percentage (100%) of alive protocorm. The highest percentage of protocorm multiplication were resulted from 15% CW+0.51 mg L-1 BAP (65.3%) and 15% CW + 0.5 mg L-1 TDZ (62.7%). The best treatment to promote formation of leaves and roots from protocorm was 15% CW. The percentage of polyploid plantlets of 3% was found in plantlet from 15% CW + 0.50 mg L-1 TDZ media treatment while from other treatments could not be detected.Keywords: BAP, chromosome, coconut water, plantlet, TDZ

Pertumbuhan dan Hasil Gandum pada Berbagai Kerapatan Populasi dan Dosis Pemupukan Urea

Zubaidi, Akhmad ( University of Mataram, Lombok ) , Anugrahwati, Dwi Ratna ( University of Mataram, Lombok ) , Yakop, dan Uyek Malik ( University of Mataram, Lombok )

Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 46, No 3 (2018): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy

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Abstract

ABSTRACTEfforts to produce wheat in Indonesia need to be supported by the availability of cultivation technology suitable for agro-climate conditions in Indonesia, including the use of proper population density and fertilization dosages, which are fundamental for obtaining maximum yields. This study was aimed to determine ideal population density and dosage of urea for optimum grain yield of wheat in Lombok Island. The experiment carried out at Aik Bukak, Central Lombok at elevation of 400 m asl, to observe the growth and yield of two varieties of wheat, Nias and Gladius, with 4 plant population densities (133, 160, 200, and 250 plants m-2) and 3 dosages of urea fertilization, 200, 300, and 400 kg ha-1. Data from this study indicated that Lombok Island has the potential for growing wheat with quite dense population density of 250 plants m-2. This density yielded higher, 1.74 tons ha-2, due to the increased number of kernel per unit area without reducing individual kernel weight. The use of urea 300 kg ha-1 exhibited the best growth and yielded 1.32 tons ha-2.Keywords: fertilization, population density, wheat varieties

Evaluasi Toleransi Genotipe Kacang Hijau terhadap Cekaman Salinitas

,, Trustinah ( Balai Penelitian Tanaman Aneka Kacang dan Umbi ) , Taufiq, Abdullah, Iswanto, dan Rudi

Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 46, No 3 (2018): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy

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Abstract

ABSTRACT    Salinity has become a serious problem in the production of food crops in Indonesia, especially in coastal areas. Mungbeans is one of commodities which can be grown in coastal areas during the dry season. Research to evaluate tolerance of mungbean genotypes to salinity stress was conducted on saline soil (EC 11.4 dS m-1) at Lohgung Village, Brondong Sub District, Lamongan District during dry season May-July in 2016. A 100 of mungbean genotypes were evaluated using a randomized block design, replicated twice. The majority of the genotypes (82%) were categorized between sensitive to very sensitive to salinity stress. All of the genotypes grew normally to generative phase and produced 2-9 pods per plant with seed yield ranged 0.04-0.60 ton ha-1. The tolerant genotypes had higher plant height, stover weight, and yield than the sensitive genotypes. Six genotypes indicated as very tolerant to salinity stress (EC: 9.24 to 15.06 dS m-1) i.e., MLG 1065/Vima1-279, MMC 464c-gt-4-0-3, MMC 678-8c-gt-5, Vima 1/MLG 1065-286, MLG 1065/Vima1-276 and Vima1/Sampeong//Vima1-249. Seven genotypes indicated as tolerant to salinity stress i.e., Vima1/MLG1065-290, MLG1065/Vima1-272,  MLG1065/Vima1-274, Vima1/MLG 1065-287, Vima1/MLG 1065-276, MMC 267c-mn-1-1-11, and VIMA 1/MLG 1065-288. These selected genotypes were potential to be developed into new mungbean variety tolerant to salinity.Keywords: electrical conductivity, growth, yield, selection, Vigna radiata

Efisiensi Penggunaan Radiasi Matahari dan Respon Tanaman Kedelai (Glycine max L.) terhadap Penggunaan Mulsa Reflektif

Mubarak, Syahrun, ,, Impron ( Departemen Geofisika dan Meteorologi, Fakultas Matematika dan Ilmu Pengetahuan Alam Gedung FMIPA Wing 19 Lv. 4 Kampus IPB Darmaga, Bogor 16680, Indonesia ) , June, dan Tania ( Departemen Geofisika dan Meteorologi, Fakultas Matematika dan Ilmu Pengetahuan Alam Gedung FMIPA Wing 19 Lv. 4 Kampus IPB Darmaga, Bogor 16680, Indonesia )

Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 46, No 3 (2018): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy

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Abstract

ABSTRACTOne of factors affecting the productivity of soybean crop is the availability of solar radiation. Reduction of solar radiation reaching soybean crop by cloud cover especially during rainy season or by shade of trees could potentially decrease soybean production. The availability of radiation for the crop can be increased through the use of reflective mulch to reflect back transmitted radiation to the crop canopy. This study aimed to determine the effect of shade and reflective mulch on crop solar radiation balance and crop productivity responses. A field experiment in Bogor, Indonesia in July 2016 to January 2017, was conducted, applying a Nested Design-two factors model with three replications. The first factor was two levels of shading, i.e., without and with 50% shade; and the second factor was three levels, i.e., without mulch, black silver mulch, and metallic mulch. The results showed that the use of mulch influenced the radiation balance of plants, increasing distribution of radiation reception in plants, solar radiation interception and RUE. The use of mulch caused changes in canopy structure by increase LAI, so that the inhibited radiation was higher. The reflected radiation from the mulch increased production per plants and weight of 1,000 seeds in shaded plants.Keywords: black silver mulch, metallic mulch, radiation balance, radiation interception, shading

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