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Fertilizer Recommendation: Correlation and Calibration Study of Soil P Test for Yard Long Bean (Vigna unguilata L.) on Ultisols in Nanggung-Bogor Susila, Anas Dinurrohman; Kartika, Juang Gema; Prasetyo, Tisna; Palada, Manuel Celiz
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol 38, No 3 (2010): Jurnal Agronomi Indonesia
Publisher : Bogor Agricultural University

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Abstract

Yard long bean (Vigna unguilata L.) 777 was grown in Ultisols, which typically have low pH and high P-fixation, to determine the best correlation of soil extraction methods for soil P with yields, and to develop soil P response categories.  The research was conducted at SANREM base camp in Hambaro Village, Nanggung, Bogor, Indonesia from April-August 2008. Treatments were arranged in a Split Plot Design with three replications. The main plots were treatments with soil P status of 0X, ¼X, ½X, ¾X and X, where is X = 1,590.5 kg SP-36 ha-1 (36% P2O5) applied once  a month before planting.  The subplots were P application rate of   0, 75, 150, 225 and 300 kg P2O5 ha-1. Yard long beans were planted in double rows per bed, 60 cm between rows and 25 cm within rows, 2 seeds per hole, with plot size of  1.5 m x 5 m. Coefficient correlation (r) of  extraction reagents Olsen, Bray-1, HCl 25%, and Mechlich-1 were 0.772, 0.765, 0.755, and 0.732, respectively.  Based on Olsen soil testing methods, soil response categories of very low, low, medium, and high were (ppm P2O5) ≤ 18.40, 18.40 < P < 117.27, 117.27 < P < 267.04, and ≥ 267.04 extracted-P, respectively. Based on Bray-1 soil testing methods, soil response categories for low, medium, and high were ≤ 87.81, 87.81
Pengaruh Naungan Tegakan Pohon Terhadap Pertumbuhan dan Produktivitas Beberapa Tanaman Sayuran Indigenous ekawati, rina; Susila, anas D; Kartika, Juang Gema
Jurnal Hortikultura Indonesia Vol 1, No 1 (2010): Jurnal Hortikultura Indonesia
Publisher : Perhimpunan Hortikultura Indonesia

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Abstract

The objectives of this research was to study the effect of shade on growth and productivity of several  indigenous vegetables.  The research was conducted at Vegetable Garden, University Farm IPB, Darmaga from February until June 2009. This research was arranged in a Randomized Completely Block Design, 1 factor with 2 treatments, shading (N1) and no shading (N0). Result of the research showed that shading increased plant height, length of branch, leaf length and width of Daun Ginseng (Talinum triangulare); leaf diameter, leaf length and width, petiole length of Sambung Nyawa (Gynura procumbens); leaf length and width of Katuk (Sauropus androgynus); leaf number of Kenikir (Cosmos caudatus), stem diameter of Kemangi (Ocimum americanum); plant height, length of branch, number of branch, leaf length and width of Pohpohan (Pilea trinervia). Shading also increased total fresh and dry weight/plant of Daun Ginseng; and total fresh/plant of Sambung Nyawa and Pohpohan plants. Productivity of Daun Ginseng and Pohpohan at shade field was better than at open field. Daun Ginseng, Sambung Nyawa, Kenikir, Kemangi and Pohpohan plants prefered growing at low light intensity (shade plants).   Key words: indigenous vegetable, shading, growth, productivity
Selection and Characterization of Endophytic Bacteria as Biocontrol Agents of Tomato Bacterial Wilt Disease NAWANGSIH, ABDJAD ASIH; DAMAYANTI, IKA; WIYONO, SURYO; KARTIKA, JUANG GEMA
HAYATI Journal of Biosciences Vol 18, No 2 (2011): June 2011
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (100.687 KB) | DOI: 10.4308/hjb.18.2.66

Abstract

Biological control of bacterial wilt pathogen (Ralstonia solanacearum) of tomato using endophytic bacteria is one of the alternative control methods to support sustainable agriculture. This study was conducted to select and characterize endophytic bacteria isolated from healthy tomato stems and to test their ability to promote plant growth and suppress bacterial wilt disease. Among 49 isolates successfully isolated, 41 were non-plant pathogenic. Green house test on six selected isolates based on antagonistic effect on R. solanacearum or ability to suppress R. solanacearum population in dual culture assays obtained BC4 and BL10 isolates as promising biocontrol agents.  At six weeks after transplanting, plants treated with BC4 isolate showed significantly lower disease incidence (33%) than that of control (83%). Plants height was not significantly affected by endophytic bacterial treatments. Based on 16S rRNA sequence, BC4 isolate had 97% similarity with Staphylococcus epidermidis (accession number EU834240.1), while isolate BL10 had 98% similarity with Bacillus amyloliquefaciens strain JK-SD002 (accession number AB547229.1).
Increasing Production of Chilli (Capsicum annuum L.) through Foliar Fertilizer Application Sugiyanta, Sugiyanta; Kartika, Juang Gema
Journal of Tropical Crop Science Vol 5 No 1 (2018): Journal of Tropical Crop Science - available online July 2018
Publisher : Journal of Tropical Crop Science

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Abstract

Chili is one of the most important spices in Indonesia; the demand for chili is increasing along with the growth of the population. Chilli is generally grown under intensive culture which includes addition of fertilizers to improve crop growth and increase crop productivity.  A study was conducted to examine seven different rates of an inorganic foliar fertilizer HF at 0.5, 0.75, 1, 1.25 and 1.5 of the recommended rate, with no foliar fertilizer and a standard foliar fertilizer GD as control. The results showed that spraying foliar fertilizer HF generally improved the growth and yield of chilli compared to without fertilizer. Plant height, number of branches and number of fruits per plant, weight per fruit, weight per 10 fruits, yield per plant, yield per plot, and yield per ha of chilli treated with inorganic fertilizers was significantly higher than the without foliar fertilizer. Foliar fertilizer HF at 0.5 of the recommendation rate, or 1 kg.ha-1 foliar fertilizer applied at 4, 6, 8, 10, and 12 week after planting in addition to the basic fertilizers of 400 kg.ha-1 of urea, 200 kg.ha-1 of SP-36, 250 kg.ha-1 of KCl applied to the soil, was effective to obtain the maximum chilli fruit yield.
The Use of Trellis and Mulch Increased Fruit Production of Spaghetti Squash (Cucurbita pepo L.) Kartika, Juang Gema; Karyana, Shinta Wulandari
Journal of Tropical Crop Science Vol 4 No 3 (2017): Journal of Tropical Crop Science - available online January 2018
Publisher : Journal of Tropical Crop Science

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Abstract

Spaghetti squash is squash of American origin that has spaghetti-like characteristic of fruit flesh, unlike any other squash varieties. This study aims to investigate the use of trellis and mulch to increase the spaghetti squash production. The experiment was conducted at the Experimental Station of Centre of Tropical Horticulture, Bogor from April to November 2016. The experiment used a completely randomized block design with four replicates. Two factors were tested, i.e. the use of trellis and mulch as the main plots, and accessions of the spaghetti squash as a sub-plot. The treatments were the use of trellis and mulch, mulch without the trellis, the trellis without mulch, and without the trellis and mulch. The spaghetti squash accessions used in this experiment were accessions from Taiwan (F1) and from America. Each experimental unit consists of five plants with a total a total of 160 plants. The results of this experiment showed that the growing squash using mulch and trellis had the greatest number of fruits per plant, more marketable fruits and had the largest fruit weight as compared with the other treatments. Taiwan accession had more fruits per plant and total marketable fruits, the largest fruit weight, the longest and widest fruits with large fruit diameter. Taiwan accession produced fruits at lower nodes of the plants, and fruits can be harvested earlier than the American accession. Correlation analysis indicated that the more fruits per plant, the more number of fruits that are marketable, the greater fruit weight and more fruits can be harvested from the higher nodes of the plants. From agronomical point of view, Taiwan spaghetti squash would be preferable to obtain the high fruit production provided the crops were mulched and grown with trellis.Keywords: Cucurbitacea, trellis, mulch, plant culture
Improving Growth and Production of Cabbage (Brassica oleraceae L.) with Compound Fertilizer Application Kartika, Juang Gema; Sugiyanta, Sugiyanta; Herdyanti, Tri; Fadilah, Nurul
Journal of Tropical Crop Science Vol 4 No 2 (2017): Journal of Tropical Crop Science
Publisher : Journal of Tropical Crop Science

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Abstract

Natural soils at times do not supply sufficient amount of nutrients for the crops including cabbage, an important vegetable crop in the tropics. Therefore it is necessary to add fertilizer to supplement the soil nutrients to optimize crop growth and production. A study was conducted to examine seven different rates of inorganic fertilizers Cap Daun at 0.5, 0.75, 1, 1.25 and 1.5 of the recommended rate with the no fertilizer as the control. The results showed that inorganic fertilizer treatment generally improved the growth and yield of cabbage compared to the control. The number of leaf, yield per plant, yield per plot, and yield per ha of cabbage treated with inorganic fertilizers was significantly higher than the control treatment. The recommended rate for cabbage plants is 0.5 recommendation rate, which means applying 136 kg.ha-1 of inorganic fertilizer and urea fertilizer of 64 kg.ha-1 and SP-36 27 kg.ha-1 applied twice, 50% at 1 WAP and the rest at four WAP to get the best results. Keywords: inorganic fertilizer, recommendation rate, relative agronomic effectivity value
Aplikasi 1-Methylcyclopropeneuntuk Meningkatkan Vase life Bunga Potong Tapeinochilos anannaceae K. Schum Salsabilla, Isa; Kartika, Juang Gema
Buletin Agrohorti Vol 1, No 4 (2013): Oktober 2013
Publisher : Departemen Agronomi dan Hortikultura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (487.368 KB) | DOI: 10.29244/agrob.1.4.101-110

Abstract

Kualitas bunga Tapeinochilos anannaceae K. Schum (kasturi) sebagai bunga potong harus dipertahankan kesegarannya selama masa simpan, sehingga perlu diaplikasikan perlakuan pasca panen yang tepat. Salah satu perlakuan pasca panen yang dapat digunakan adalah pemberian 1-Methylcyclopropene (1-MCP). Posisi bunga selama penyimpanan diduga dapat mempengaruhi vase life bunga potong. Penelitian ini bertujuan untuk memperpanjang vase life bunga potong kasturi dengan menggunakan 1-MCP, mendapatkan konsentrasi 1-MCP optimum dan mencari posisi yang terbaik untuk memperpanjang vase life bunga potong kasturi. Penelitian ini menggunakan rancangan acak lengkap (RAL) faktorial yang terdiri dari dua faktor dan sepuluh ulangan, faktor pertama adalah konsentrasi 1-MCP yang terdiri dari lima taraf: 0 ppm (A0), 0.1 ppm (A1), 0.2 ppm (A2), 0.3 ppm (A3) dan 0.4 ppm (A4). Faktor kedua yaitu posisi penyimpanan secara vertikal dan horizontal. Hasil penelitian menunjukkan bahwa aplikasi 1-MCP pada bunga potong kasturi secara nyata dapat memperpanjang vase life bunga potong kasturi hingga 1.2-1.8 kali lipat dibandingkan tanpa perlakuan 1-MCP. Kombinasi perlakuan yang optimum untuk memperpanjang vase life bunga potong kasturi adalah 1-MCP dengan konsentrasi 0.3 ppm dan disimpan dengan posisi vertikal.
Pengaruh Pupuk Nitrogen dan Pupuk Hayati Cair Terhadap Pertumbuhan dan Produksi Sayuran Daun Indigenous Tahunan Delyani, Rista; Kartika, Juang Gema
Buletin Agrohorti Vol 4, No 3 (2016): Buletin Agrohorti
Publisher : Departemen Agronomi dan Hortikultura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (274.215 KB) | DOI: 10.29244/agrob.4.3.336-342

Abstract

Penelitian ini bertujuan untuk mendapatkan dosis pupuk nitrogen terbaik dan mengetahui pengaruh pupuk cair hayati terhadap pertumbuhan dan produksi dua sayuran daun indigenous tahunan sebagai komoditas sayuran yang dapat dipanen lebih dari satu kali. Penelitian dilaksanakan kebun percobaan Lewikopo IPB, Dramaga, Bogor mulai pada bulan Januari sampai Mei 2012. Penelitian menggunakan percobaan paralel dengan 2 komoditas, yaitu kenikir dan kemangi. Penelitian disusun dengan Rancangan Kelompok Lengkap Teracak (RKLT) dengan 2 faktor untuk setiap komoditas. Faktor pertama dadalah dosis Nitrogen dengan 4 taraf, 0 kg ha-1, 45 kg ha-1, 90 kg ha-1, dan 135 kg ha-1. Faktor keduan adalah Pupuk Cair Hayati (PCH) dengan 2 taraf, dengan PCH dan tanpa PCH. Hasil menunjukkan bahwa dosis Nitrogen dapat meningkatkan produksi dua sayuran daun indigenous pada bobot hasil panen per petak. Nitrogen dapat memberikan produksi lebih baik pada lingkungan tapi belum optimum. Dosis rekomendasi Nitrogen sebesar 92,73 kg ha-1 untuk kenikir dan 45 kg ha-1 untuk kemangi. PCH tidak memberikan pengaruh terhadap produksi dari dua sayuran daun indigenous.
Budi Daya Lisianthus (Eustoma grandiflorum (Raf.) Shinn.) di Mayungan, Bali Demas, Antony; Sukma, Dewi; Kartika, Juang Gema
Buletin Agrohorti Vol 4, No 3 (2016): Buletin Agrohorti
Publisher : Departemen Agronomi dan Hortikultura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (401.246 KB) | DOI: 10.29244/agrob.4.3.343-351

Abstract

Tujuan dari penelitian ini adalah untuk meningkatkan pengetahuan dan keterampilan dasar yang berkaitan dengan pengalaman praktik kerja lapangan pada budi daya lisianthus (Eustoma grandiflorum (Raf) Shinn.). Penelitian dilaksanakan di Mayungan, Bali dari Februari - Juni 2009. Selama penelitian berlangsung, pekerjaan yang dilakukan sebagai buruh, pengawas asisten, dan asisten manajer. Beberapa data diperoleh melalui wawancara dan diskusi dengan pekerja dan manajer, selain itu juga pengamatan langsung di lapangan. Informasi yang diperoleh berkaitan dengan profil perusahaan, kondisi tanah, konstruksi penanaman, dan kendala pekerjaan. Fakta budi daya lisianthus, seperti pengembangan tanaman di pembibitan dan rumah kaca, karakteristik tanaman, metode irigasi, pupuk, persentase tanaman produktif, sebaran panen, dan vase life telah diamati. Lisianthus memiliki karakteristik yang unik sebagai tanaman bunga potong, selain itu bervariasi antar varietasnya. Metode budidayanya tidak hanya merawat tanaman muda pada plug produksi tetapi juga menumbuhkan lisianthus dalam rumah kaca produksi, hingga penanganan pascapanen. Terdapat kekurangan dalam produktivitas tanaman yang terlihat sangat rendah. Secara khusus pada produksi dan sistem pemasaran dalam rangka untuk bersaing dengan petani bunga potong berpengalaman dan terlatih.
Penggunaan Pupuk Cair Hayati Berbahan Dasar Sawi Putih dan Keong untuk Meningkatkan Produksi Sawi Putih (Brassica pekinensis (Lour)) Nurgama, Prama; Purnamawati, Heni; Kartika, Juang Gema
Buletin Agrohorti Vol 3, No 2 (2015): Buletin Agrohorti
Publisher : Departemen Agronomi dan Hortikultura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (321.712 KB) | DOI: 10.29244/agrob.3.2.160-168

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan PCH sebagai substitusi pupuk anorganik untuk produksi sawi putih sehingga dapat meningkatkan kesejahteraan petani. Penelitian ini dilaksanakan di Desa Gedepangrango, Kecamatan Kadudampit, Kabupaten Sukabumi mulai bulan Januari hingga Mei 2011. Penelitian ini menggunakan Rancangan Kelompok Lengkap Teracak (RKLT) dengan satu faktor perlakuan yang terdiri atas 13 macam perlakuan dan menggunakan empat kali ulangan, sehingga terdapat 52 satuan percobaan. Hasil penelitian menunjukan bahwa pada parameter tinggi tanaman perlakuan 1 440 L PCH keong ha-1 menghasilkan tinggi krop tertinggi yaitu 29.94 cm, sedangkan untuk parameter lingkar horizontal, lingkar vertikal dan diameter 2, perlakuan 200 kg NPK ha-1 + 720 L PCH keong ha-1 yang menghasilkan nilai tertinggi dengan nilai masing-masing berturut 34.42 cm, 68.33 cm, dan 9.31 cm. Perlakuan 300 kg NPK ha-1 + 360 L PCH keong/ha menunjukan hasil tertinggi untuk parameter diameter 1 yaitu sebesar 11.04. Perlakuan 100 kg NPK ha-1 + 1080 L PCH campuran (sawi+keong) ha-1 menghasilkan bobot rata-rata tajuk tanaman tertinggi yaitu 996.43 g per tanaman. Secara umum perlakuan 200 kg NPK ha-1 + 720 L PCH keong ha-1 menunjukan hasil terbaik berdasarkan uji hedonik oleh 30 panelis terhadap semua parameter yang diujikan yaitu warna, bentuk, ukuran, kerenyahan, dan kesukaan.