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All Journal HAYATI Journal of Biosciences Buletin Agrohorti Jurnal Ilmu Pertanian Indonesia Jurnal Hortikultura Indonesia (JHI) BIOTROPIA - The Southeast Asian Journal of Tropical Biology Journal of Tropical Crop Science

Juang Gema Kartika

Department Of Agronomy And Horticulture, Faculty Of Agriculture, IPB University Jl. Meranti, IPB Darmaga Campus, Bogor 16680, Indonesia

Author-ID : 296228

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Immunology & microbiology Veterinary

Published : 43 Documents Claim Missing Document

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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 : Department of Agronomy and Horticulture, IPB University

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

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
Publisher : Department of Agronomy and Horticulture, IPB University

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

Increasing Production of Chilli (Capsicum annuum L.) through Foliar Fertilizer Application Sugiyanta Sugiyanta; Juang Gema Kartika
Journal of Tropical Crop Science Vol. 5 No. 1 (2018): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

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.

Analysis of the Morphology and Secondary Metabolite Content of Several Katuk (Sauropus androgynus) Accessions Hakiki, Firdha Annisa; Masruroh, Qibtiyatul; Kartika, Juang Gema; Susila, Anas Dinurrohman; Kyoung, Cheong Min; Rahmah, Yulia
Journal of Tropical Crop Science Vol. 12 No. 03 (2025): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.12.03.639-646

Katuk (Sauropus androgynus) is a species valued for its nutritional and medicinal properties, as well as its potential applications in food, herbal medicine, livestock feed, and cosmetics. This study aimed to evaluate the morphological diversity and secondary metabolite profiles of four katuk accessions. Two analyses were conducted: (1) morphological characterization using cluster analysis and (2) qualitative and quantitative assessment of secondary metabolites. Cluster analysis revealed that all accessions showed high similarity with the “Paris”, an accession widely grown in West Java, Indonesia (similarity coefficient = 1.00), and moderate similarity with accessions “K1”, “K2”, “K4”, “Bastar”, and “Zanzibar” (distance coefficient = 0.68). Metabolite profiling indicated variations in compound abundance among accessions. “Ciaruteun Ilir 1” exhibited the highest vitamin E content; “Ciaruteun Ilir 2” had the highest fatty acid and phenolic content; “Pager Jangkung 1” accumulated the most flavonoids, while “Pager Jangkung 2” contained the most terpenoids and carboxylic acids. The leaves of katuk accessions in this study contains 14-17% squalene; this is an important finding for the pharmaceutical and health industries.

Effects of Gibberellic Acid (GA3) Application on The Plant Growth and Seed Production of Pinto Peanut (Arachis pintoi Krap & Greg) Dani, Robi Rahmat; Kartika, Juang Gema; Sari, Maryati
Journal of Tropical Crop Science Vol. 10 No. 01 (2023): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.10.1.27-37

Pinto peanut (Arachis pintoi Krap & Greg.) is a legume that is usually used as a cover crop, bio mulch in fruit and vegetable plantations, ornamental plants, and animal feed. Pinto peanut has many benefits; through the symbiosis with rhizobacteria they can fix nitrogen, as ground cover can reduce the risk of landslides, inhibit weed growths, and is a source of nectar for bees. Arahcnis pintoi can be propagated vegetatively or generatively, but generative propagation is hard to conduct in the tropics because it takes a long time for the plants to produce seeds. Our study was conducted to determine the effect of GA3 application on seed production of A. pintoi. The experiment was arranged in a single factor randomized complete block design with GA3 concentration of 0, 75, 150, 225, and 300 ppm. An orthogonal polynomial test was conducted to determine the effective concentrations for GA3 on seed formation and seed viability. Harvested seeds were stored for 1 month, then sown on sand medium; the seeds were soaked in 1% KNO3 solution to break seed dormancy prior. Our study showed that the GA3 effective concentration range from 130.69 ppm to 137.16 ppm, indicated by the increase the number of flowers at 105, 120, 135, and 150 DAT up to 28.59% compared to control. GA3 at 126.80 ppm can also increase the number of harvested pods by 18.16%. The effect of GA3 on vegetative growth was shown by the increase in the growth of new individual plants concentration, i.e. 53.25 new individual plant with GA3 application of 141.88 ppm.

Co-Authors , Krisantini Abdjad Asih Nawangsih Aditama, Ravi Agik Suprayogi Agus Purwito Anas D Susila Anas D. Susila Anas Dinurrohman Susila Ani Kurniawati Anita Maryam Annisa Fadila Antony Demas Aris Aprilianto Asih, Ni Putu Sri Bambang Suhartawan Benny Rahardian Prawoto Chandi Tri Akbar Daawia, Daawia Dani, Robi Rahmat Delyani, Rista Demas, Antony Dewi Sukma Didy Sopandie Dwi Mei Setiawan Edi Santosa Eneng Fakhrunnisa Fachrul Rohimin Iska Faisal Radjab Munawar Fakhrunnisa, Eneng Faqih Udin Fina Oktavianti Firmansyah, Eriyanto Fitria Andini Hakiki, Firdha Annisa Hardi Satria Tarigan Herdyanti, Tri I Gusti Ngurah Galang Aditya Ida Parida IKA DAMAYANTI Irsyad, Reza Fathianto Isa Salsabilla Isa Salsabilla Iska, Fachrul Rohimin Isnan, Muhammad Karyana, Shinta Wulandari Ketty Suketi Kyoung, Cheong Min Lamawati, Shelvy Luh Putu Ratna Sundari Maryam, Anita Maryati Sari Masruroh, Qibtiyatul Matra, Deden D. Maya Melati Megayani Sri Rahayu Meilya Ramadhiana Safitry Meilya Ramadhiana Safitry Muhammad Arifianto Muhammad Arifianto, Muhammad Muhammad Isnan Munawar, Faisal Radjab Ni Made Armini Wiendi Nindita, Anggi Nurgama, Prama Nurul Fadilah, Nurul Prama Nurgama Prasetyawati , Adinda Prawoto, Benny Rahardian Prima Rahanita Puspita, Gusti Reza Rahanita, Prima Rahmah, Yulia Rahmat Hadi Wibowo Rista Delyani Ritonga, Arya Widura Rosyad, Astyani Shandra Amarillis Shelvy Lamawati Siti Nabila Nur Safha Sofyan Zaman Sudarsono Sugiyanta Suryo Wiyono Tarigan, Hardi Satria Thresna Suci Riyandhini Tiara Adyantari Visasti , Khurul Wahyu Arif Sudarsono Wahyu Arif Sudarsono Wibowo, Rahmat Hadi Yudhi, Joshinjitsu Fatirizqina

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