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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Buletin Agrohorti Jurnal Hortikultura Indonesia (JHI) Jurnal Agroqua: Media Informasi Agronomi dan Budidaya Perairan Journal of Tropical Crop Science International Journal of Global Operations Research ADMA: Jurnal Pengabdian dan Pemberdayaan Masyarakat Empowerment Society Indonesian Accounting Research Journal Policy Brief Pertanian, Kelautan, dan Biosains Tropika
Sudradjat
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Agriculture, Biological Sciences & Forestry Humanities Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Engineering Environmental Science Languange, Linguistic, Communication & Media Mathematics Nursing Social Sciences Other

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Journal : Journal of Tropical Crop Science

 1 
Assessment of Nitrogen Volatilization and Greenhouse Gas Emissions from Urea with N-stabilizer in a Productive Oil Palm Plantation (Elaeis guineensis Jacq.) Waraqi, Bismo; Agusta, Herdhata Herdhata; Sudradjat; Hariyadi
Journal of Tropical Crop Science Vol. 11 No. 03 (2024): 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.11.03.260-267

Abstract

Nitrogen fertilization plays a crucial role in supporting plant growth. However, nitrogen in the soil can be lost through rainwater leaching. To address this issue, the concept of fertilizing N-stabilizer-coated urea was proposed. The aim is to reduce nitrogen loss on the field due to vaporization and minimize greenhouse gas (GHG) emissions. The study was conducted to assess the effectiveness of this N-stabilizer-coated urea in reducing nitrogen loss through vaporization, improving GHG emissions, and its impact on plant growth and leaf quality. The research was conducted at IPB-Cargill Jonggol, Bogor, West Java, oil palm education and research station from August 2021 to March 2022. The experimental design employed a completely randomized block design. The fertilizer treatments included four types of nitrogen fertilizers: urea (46% N), coated urea with N-stabilizer (46% N), ZA (21% N), and NPK (15-15-15, 15% N). Additionally, a control treatment without any fertilizer application was included. All treatments were replicated three times. Data analysis was done using the SAS (Statistical Analysis System) 9.0 program. The F-test was conducted, followed by DMRT (Duncan Multiple Range Test) advanced tests at a 5% error level. The results revealed that urea with N-stabilizer fertilization significantly reduced NH3-vaporization by 53% in the first week compared to the application of normal urea. NH3-vaporization level from ZA and NPK was < 1% compared to urea application. Field application of urea with N-stabilizer showed no significant difference in greenhouse gas emission (GHG) compared to the other nitrogen fertilizer types. The GHG values ranged from 7.10 to 7.29 g CO2-e.m-2 per day. The use of N-stabilizer-coated urea could be an effective approach to minimize nitrogen loss through vaporization and reduce greenhouse gas emissions while maintaining comparable results to other nitrogen fertilizer types in terms of GHG emissions on the field.
Utilization of Plasma Technology to Control Weed Seed Germination Bukhori, Anwar; Guntoro, Dwi; Sudradjat; Tri Sugiarto, Anto
Journal of Tropical Crop Science Vol. 11 No. 02 (2024): 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.11.02.200-205

Abstract

Efforts to reduce herbicide use include employing cold plasma technology, which produces heat energy from UV plasma rays using a combination of electrical power. This research aimed to determine the effectiveness of plasma technology in controlling weeds and to identify the optimal voltage and duration for using cold plasma technology to inhibit seed germination. The study was conducted at the Ecotoxicology Laboratory and Seed Propagation Laboratory of IPB in Bogor, Indonesia, from January to March 2023. It comprised two experiments: (1) testing the voltage and time duration of cold plasma technology and (2) examining the effect of electrode needle distance on mustard seeds. The first experiment followed a completely randomized design with plasma voltage and time duration as the treatments. The second experiment used a single-factor completely randomized design to investigate the electrode needle distance. Each experiment included four replications. The results indicated that a voltage of 140 kV with a duration of 80 seconds could suppress mustard seed germination by up to 100%. Additionally, using an electrode needle distance of 0.5 cm reduced the germination percentage of mustard seeds by up to 100% at 7 and 14 days after treatment.
Co-Authors Agus Setiyono AHMAD JUNAEDI Anam, M. Khairul Ario Damar Astuti Kurnianingsih Asyifa , Siti Aufhar, Ihkam Amalul Bintoro, Muhammad Hasjim Bukhori, Anwar Callista, Christine Dwi Guntoro Evy Damayanthi Fatimah Abdillah Febrian, Jan Febriyan Ferdinans, Ferdinans HAPPY WIDIASTUTI Hariyadi Hasim Herdhata Agusta Hunaefi, Dase Idiatsyah, Rully Amelia Idqan Fahmi IPB, DGB Jan Febrian Julita Nahar, Julita Lala M Kolopaking Lauwsetia, Chessa Auriel M Agus Setiadi Ma'mun Sarma Muhammad Hasjim Bintoro Djoefrie Hasjim Bintoro Djoefrie Nahrowi Oktariza, Wawan Purwiyatno Hariyadi Rian Prasetyo Risa Wentasari Saputra, Aris Adi Sidiq, Egi Nur Muhamad Siti Asyifa Sofyan Zaman Sri Purwaningsih, Sri Sridanti, Irma Lisa Sudirman Yahya Sumiati Suria Darma Tarigan Suryo Wiyono Syarifullah, Nabila Nuralfia Zahrani Tri Sugiarto, Anto Tullah, Dewi Sarifah Ulfah Juniarti Siregar Ulhaq, Hafizh Dhiya Waraqi, Bismo Widiastuti, Natalia Puteri Zadzali, Helmi