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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Buletin Agrohorti Jurnal Ilmu Pertanian Indonesia Jurnal Ilmu Pertanian International Journal of Science and Engineering (IJSE) Sains Tanah JURNAL ILMU PERTANIAN Jurnal Sumberdaya Alam dan Lingkungan AGRIVITA, Journal of Agricultural Science Indonesian Journal of Physics and Nuclear Applications Jurnal Agroqua: Media Informasi Agronomi dan Budidaya Perairan Jurnal Penelitian Kelapa Sawit Journal of Tropical Crop Science JURNAL PERTANIAN jurnal Ilmu Pertanian (Agricultural Science) Perbal: Jurnal Pertanian Berkelanjutan
Herdhata Agusta
Departement Of Agronomy And Horticulture, Faculty Of Agriculture, IPB University (Bogor Agricultural University), Jl. Meranti, Kampus IPB Dramaga, Bogor 16680, INDONESIA
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Economics, Econometrics & Finance Engineering Environmental Science Physics Veterinary

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Journal : Journal of Tropical Crop Science

 1 
Plant Growth Performance of Top Grafted Young Cacao at Various Elevations in Indonesia Poleuleng, Andi Besse; Agusta, Herdhata; Yahya, Sudirman; Wachjar, Ade; Tjoa, Aiyen
Journal of Tropical Crop Science Vol 7 No 02 (2020): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (781.91 KB) | DOI: 10.29244/jtcs.7.02.59-65

Abstract

The purpose of this study was to evaluate the plant growth performance of top grafted young cacao cultivated in various elevations. This research was conducted from January-August 2019 in South Sulawesi and Central Sulawesi. A total of 54 plants were taken randomly from 6 locations with 3 altitudes (<300, 300-600, >600 meter above sea level, as.). The results showed that there was not significant different of plant height, stem circle, crown circle, the number of primary branches, the number of flowers, the length of horizontal and vertical roots in response to different elevations. However, the height of primary stem and leaves number of cacao from <300 m asl was significantly greater than those from either 300-600 m asl or > 600 m asl. The largest crown portion of actual biomass was found in the branches, then followed by the leaves and stem. While the highest actual root biomass was found at 10-20 cm soil depth.
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.
Photosynthesis Rate, Sugar and Starch Content of Sago Leaves (Metroxylon sp.) at Different Preparation Methods of Sago Seedlings Ayulia, Liska; Djoefrie, M.H.B.; Agusta, Herdhata
Journal of Tropical Crop Science Vol. 9 No. 03 (2022): 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.9.03.174-182

Abstract

Photosynthesis rate plays a significant role in plant growth and development. A study was conducted to determine the best methods to grow sago planting materials from sago suckers. Photosynthesis rate, stomatal density, intercellular CO2 concentration, stomatal conductance, transpiration, sugar and starch content of the sago leaves from different methods of planting was determined. The field experiment was carried out at the Cikabayan Experimental Station from January 2020 to February 2021; the leaf morphology was conducted at the Microtechnical Laboratory and Testing Laboratory of the Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia. The treatments for the sago seedlings were immersion of the bare-rooted seedlings in water, immersion in water with media mix in polybags, transplanted to media mix in polybags, and immersion of bare-rooted seedlings for 4 weeks in water followed by transplanting to media mix in polybags. The study was arranged using a single factor a completely randomized block design, and quantitative data was analyzed using Microsoft Excel 2013 and the SAS. Stomatal density and photosynthetic rate were not significantly different between treatments. In contrast, the sugar content of immersed seedling without polybags for one month followed by transplanting to polybag had the best growth compared to those from other treatments, both at the nursery phase and post-transplanting phase. All planting methods resulted in good quality planting materials. At the nursery phase, sago seedlings immersed in water method grew the best; at the post-transplanting phases seedlings immersed bare-rooted for one month followed by transplanting to polybags grew better than those with other treatments
Co-Authors Ade Wachjar AHMAD JUNAEDI Ahmad Zamzami Aiyen Tjoa Al Haq, Muhammad Izzuddin Al Hayah, Cauny Nur Alma Wahyuningrum Anam, M. Khairul Andi Besse Poleuleng Anung Wahyudi Ayulia, Liska Bintoro Djoefrie , Mochamad Hasjim Bintoro Joefrie Dewi Riniarti Diaguna, Ridwan Djoefrie, M.H.B. Dulbari, Dulbari Dwi Asmono Dwi Asmono Dwi Guntoro Edi Santosa Eka Maulidiya, Sherly Eko Sulistyono Fajar Ilhamy, Muhammad Rizki Fredinan Yulianda Gani Tarigan, Abdul Gani Gatot Pramuhadi Hariyadi Ilyas Marzuki Imam Santoso Irzal Effendi M Juhri Al Karomah Masluki, Masluki Melik Thiara Dikari Memen Surahman Mercy Bientri Yunindanova Mercy Bientri Yunindanova Miftahurridho, Muhammad Toha Muhamad Rafiansyah Siregar, Valdi Muhammad Hasjim Bintoro Djoefrie Hasjim Bintoro Djoefrie Nani Panca Dewi Manu Hara Karti Putri, Anita Hazimah Qadir, Abdul Risa Wentasari Rosita Dewi S Siswanto Sandra A. Aziz Santosa , Edi Sari, Anis Widia Sidiq, Egi Nur Muhamad Sofyan Zaman Sridanti, Irma Lisa Stefano, Indra Mario Sudarsono Sudirman Yahya Sudradjat Sudradjat Sudradjat Suwarto Suwarto Syaiful Anwar Tambunan, Elsass Riela TRI ASTUTI Ulfha Junita ummah, kuntum khaira Waraqi, Bismo Yan Sukmawan, Yan Yonny Koesmaryono Zadzali, Helmi