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All Journal AL KAUNIYAH Jurnal Sapta Agrica Jurnal Riset Rumpun Ilmu Tanaman Tuhenori: Jurnal Ilmiah Multidisiplin Hidroponik: Jurnal Ilmu Pertanian dan Teknologi dalam Ilmu Tanaman Jurnal Ilmu Pertanian dan Perikanan (PENARIK) Jurnal Ilmu Agroteknologi Indonesia (JIGRONA)
Helmin Parida Zebua
Universitas Sumatera Utara
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Immunology & microbiology Materials Science & Nanotechnology Social Sciences Other

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A Comparative Study Of Stomatal Characteristics of The Nine Pandanus Species From Nias Island, North Sumatra Province, Indonesia Zebua, Helmin Parida; Pasaribu, Nursahara; Siregar, Etti Sartina
Al-Kauniyah: Jurnal Biologi Vol. 17 No. 2 (2024): AL-KAUNIYAH JURNAL BIOLOGI
Publisher : Department of Biology, Faculty of Science and Technology, Syarif Hidayatullah State Islami

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/kauniyah.v17i2.31081

Abstract

AbstractThe identification of Pandanus species generally relies on morphological characteristics and requires confirmation from other identification features, such as stomata. A comparative study of stomatal characteristics among nine Pandan species originally from Nias Island, namely Pandanus atrocarpus, P. auranticus, P. labyrinthicus, P. militaris, P. odoratissimus, P. penangensis, P. tectorius, and P. utilis has been investigated. Anomocytic stomata without papillae on subsidiary cells were observed on both leaf surfaces, with significant interspecific differences in adaxial and abaxial stomatal frequencies. Pandanus tectorius exhibited the highest adaxial (30.71 ± 0.81) and abaxial (1.87 ± 0.12) stomatal frequencies. Pandanus labyrinthicus showed the highest stomatal index (adaxial 16.61 ± 2.51, abaxial 0.87 ± 0.11), while P. penangensis had the largest stomatal size (137.54 ± 6.66 µm). Overall, the stomatal parameters, including frequency, index, and size, were higher on the adaxial surface than the abaxial surface, emphasizing interspecific variations. These findings contribute valuable supportive data for the botanical systematics of Pandanus spp. in the region, enhancing our understanding of morphological characteristics crucial for species identification.AbstrakIdentifikasi jenis dari Pandanus cenderung menggunakan ciri morfologi dan memerlukan konfirmasi dari karakter lainnya, salah satunya stomata. Studi perbandingan stomata di antara sembilan spesies Pandan di Pulau Nias, Sumatera Utara telah dilakukan, yaitu Pandanus atrocarpus, P. auranticus, P. labirinthicus, P. militaris, P. odoratissimus, P. penangensis, P. tectorius, dan P. utilis. Hasil penelitian menunjukkan bahwa keseluruhan jenis Pandanus memiliki tipe stomata berupa anomositik pada kedua permukaan daun atau amfistomatous tanpa adanya papilosa pada sel tambahan. Frekuensi stomata adaksial dan abaksial memiliki perbedaan yang nyata secara statistik lintas jenis. Frekuensi stomata tertinggi pada daun adaksial/abaksial diamati berturut-turut dari P. tectorius (30,71 ± 0,81) dan P. tectorius (1,87 ± 0,12). Indeks stomata daun tertinggi diamati berturut-turut berasal dari P. labirinthicus (16,61 ± 2,51) untuk adaxial dan P. labirinthicus (0,87 ± 0,11) untuk abaxial. Ukuran stomata terbesar diamati berturut-turut berasal dari P. penangensis (137,54 ± 6,66 µm) dan P. odoratissimus (64,56 ± 3,96 µm). Secara umum, tipe stomata pada semua jenis adalah anomositik tanpa adanya papila pada sel penjaga. Parameter stomata lainnya, yaitu frekuensi, indeks, dan ukuran pada bagian adaksial cenderung lebih tinggi dibandingkan permukaan abaksial dengan variasi nilai secara interspesifik.
Pengaruh Naungan Terhadap Aktivitas Fotosintesis Dan Hasil Produksi Tanaman Cabai Merah (Capsicum Annuum L.) Zebua, Helmin Parida; Halawa, Herni Jelita; Hulu, Stefani Angel Kristin; Zebua , Siska Natalia; Mendrofa, Putra Zato
Jurnal Ilmu Agroteknologi Indonesia Vol. 2 No. 1 (2026): JIRGONA - Januari
Publisher : CV. SINAR HOWUHOWU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70134/jigrona.v2i1.1309

Abstract

This study aimed to analyze the effect of shading on the growth and photosynthetic rate of red chili pepper (Capsicum annuum L.). The results showed that shading treatment had a significant effect on morphological parameters, namely plant height and total dry weight, but did not significantly affect leaf width, leaf number, and leaf length compared to plants grown without shading. Physiologically, shading influenced quantum yield, photochemical quenching, and non-photochemical quenching, whereas the maximum photosynthetic rate (Pmax) did not show a significant difference. From an ecophysiological perspective, shading treatment significantly increased proline and ascorbic acid contents. These findings indicate that red chili pepper exhibits a high adaptive capacity to low light intensity conditions. This study is expected to contribute as a reference material and learning resource in the fields of plant physiology and plant biology.
Analisis Pengaruh Tekstur Dan Stuktur Tanah Terhadap Kemampuan Menyimpan Air Dilahan Pertanian Datar Rendah Zebua, Helmin Parida; Mendrofa, Trisna Sari; Waruwu, Inca Paskahlia; Waruwu, Frans Zefrindo Two; Gea, Irvan Havis; Waruwu, Jufrilinus
Jurnal Ilmu Agroteknologi Indonesia Vol. 2 No. 1 (2026): JIRGONA - Januari
Publisher : CV. SINAR HOWUHOWU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70134/jigrona.v2i1.1310

Abstract

The soil’s ability to store water is one of the key factors determining agricultural productivity, particularly in lowland areas that frequently experience water saturation. This study aimed to examine the effects of soil texture and structure on the soil’s water-holding capacity. Soil samples were collected from several points in lowland areas and subsequently analyzed in the laboratory using the pipette method to determine soil texture, morphological observations to assess soil structure, and the gravimetric method to measure water-holding capacity. The results showed that fine-textured soils, such as clay, have a higher water-holding capacity compared to coarse-textured soils, such as sand. Soil structures that are granular and stable enhance soil porosity and enable water to be retained for a longer period. The combination of clay texture and granular structure resulted in the most optimal soil water-holding capacity. Therefore, soil physical conditions, particularly texture and structure, play a crucial role in maintaining soil water balance. Soil management practices involving the addition of organic matter and appropriate tillage are essential measures to improve soil water-holding capacity and support sustainable agriculture in lowland areas.      
Pengaruh Kekurangan Air Terhadap Transportasi Hara Pada Tanaman Padi Zebua, Charles Septiawan; Dohona, Nurul Hamidah; Zebua, Andi Donal; Hia, Apriani; Halawa, Ariel Nezer Perlindungan; Waruwu, Basri Calvianus; Zebua, Helmin Parida
Jurnal Ilmu Agroteknologi Indonesia Vol. 2 No. 1 (2026): JIRGONA - Januari
Publisher : CV. SINAR HOWUHOWU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70134/jigrona.v2i1.1312

Abstract

Water deficiency is one of the major abiotic factors that significantly affects the growth and productivity of rice (Oryza sativa L.). Insufficient water availability disrupts vital physiological processes such as nutrient absorption, translocation, and distribution from roots to plant tissues. This study aims to analyze the effects of water shortage on the nutrient transport mechanism in rice plants. The methods included observations of soil moisture content, leaf nutrient levels, and transpiration rates under various drought treatments. The results revealed that water deficiency significantly reduced the roots’ ability to absorb essential macronutrients such as nitrogen (N), phosphorus (P), and potassium (K), due to decreased mass flow and ion diffusion in the soil. Furthermore, the reduction in turgor pressure and xylem activity disturbance inhibited the upward transport of nutrients, leading to lower vegetative growth and yield. Overall, this study emphasizes that optimal water availability is a key factor in maintaining nutrient transport efficiency and rice productivity, providing a scientific basis for developing adaptive irrigation strategies under drought conditions.   
Pengaruh Pemupukan Nitrogen Terhadap Laju Fotosintesis, Kandungan Klorofil, Dan Pertumbuhan Tanaman Jagung (Zea Mays L.) Hulu, Yanuari; Zebua, Helmin Parida; Gulo, Dencervis; Harefa, Wendi Warisman; Hia, Sastra Alberta; Mendrofa, Serlin Jessica
Jurnal Ilmu Agroteknologi Indonesia Vol. 2 No. 1 (2026): JIRGONA - Januari
Publisher : CV. SINAR HOWUHOWU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70134/jigrona.v2i1.1318

Abstract

Nitrogen is an essential nutrient that plays an important role in chlorophyll formation and photosynthesis. This study aimed to determine the effect of nitrogen fertilization on photosynthesis rate, chlorophyll content, and growth of maize (Zea mays L.). The research was conducted from October to December 2025 in Dahana Village, Universitas Nias, using a Completely Randomized Design (CRD) with four nitrogen levels and five replications. Observed parameters included plant height, number of leaves, and plant dry weight. Data were analyzed using analysis of variance (ANOVA) and LSD test at the 5% level. The results showed that nitrogen fertilization significantly affected maize growth by increasing plant height, leaf number, and dry weight. However, excessive nitrogen application did not always result in optimal growth. Therefore, appropriate nitrogen fertilization is required to support optimal maize growth.
Pengaruh Ketebalan Mulsa Organik Terhadap Pertumbuhan Dan Hasil Jagung Manis (Zea Mays Saccharata Sturt.) Gulo, Desti Kurniawan; Zebua, Helmin Parida; Laia, Dian Agung Sanora; Lase, Elikana
Jurnal Ilmu Agroteknologi Indonesia Vol. 2 No. 1 (2026): JIRGONA - Januari
Publisher : CV. SINAR HOWUHOWU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70134/jigrona.v2i1.1330

Abstract

Sweet corn (Zea mays saccharata Sturt.) is a horticultural commodity with high economic value; however, its productivity remains relatively low due to environmental stress and weed competition. Organic mulch is an environmentally friendly technology that can enhance crop productivity, yet the optimal mulch thickness for sweet corn cultivation has not been well established. This study aimed to evaluate the effect of organic mulch thickness on the growth and yield of sweet corn and to determine the optimal mulch thickness. The experiment was conducted using a non-factorial Randomized Complete Block Design (RCBD) with four levels of rice straw mulch thickness: M0 (no mulch, 0 cm), M1 (3 cm), M2 (6 cm), and M3 (9 cm). Each treatment was replicated six times. The observed parameters included plant height, number of leaves, stem diameter, husked ear weight, unhusked ear weight, and number of kernel rows per ear. The results showed that organic mulch thickness significantly affected all observed parameters. Application of rice straw mulch at a thickness of 6–9 cm effectively improved the growth and yield of sweet corn, with 9 cm being optimal for ear weight and 6 cm being optimal for the number of kernel rows.
Co-Authors Ardianus Berkat Saleh Waruwu Arianto Laoli Asdian Juliyanti Lawolo Awal Sepkurniawan Waruwu Ayler Beniah Ndraha Benediktus Buala'aro Giawa Dawolo, Toni Yusman Dohona, Nurul Hamidah ELIYUNUS WARUWU Etti Sartina Siregar etti sartina siregar Florentina Agusmawati Duha Gea, Bridayanti Gea, Irvan Havis Gulo, Dencervis Gulo, Desti Kurniawan Gulo, Namyra Olivia Gulo, Nice Anjelin Gulo, Perti Citra Damarni Gulo, Romanus Restu Gulo, Selianus Gulo, Veniman Halawa, Ariel Nezer Perlindungan Halawa, Herni Jelita Harefa, Wendi Warisman Hia, Apriani hia, sastra alberta Hulu, Stefani Angel Kristin Hulu, Yanuari Intan Novibriani Zendrato Laia, Dian Agung Sanora Larosa, Yoel Melsaro Lase, Delipiter Lase, Elikana Lase, Ningsi Kristiani Lawolo, Todermanto Lawolo, Toni Yusman Lentri Priskila Waruwu Marni Putri Gea Mendrofa, Cynthia Florentina Mendrofa, Heppy Kardiani Mendrofa, Makchsi Virall Mendrofa, Putra Zato Mendrofa, Serlin Jessica Mendrofa, Trisna Sari Nasution, Susan Tri Susanti Rahmadhani Nazara, Linda Heppy Karisda Nisiyari Halawa Nursahara Pasaribu Nursahara Pasaribu Oferlina Harefa Putra Hidayat Telaumbanua Restu Jaya Zendrato Ridho Victory Nazara Tafonao, Agustinus Tafonao, Fedilina Telaumbanua, Miskaria Murni Waruwu, Arni Lestari Waruwu, Basri Calvianus Waruwu, Frans Zefrindo Two Waruwu, Inca Paskahlia Waruwu, Jufrilinus Waruwu, Patricia Zeni Febriani Waruwu, Victoris Julman Zai, Manyupril Lukevin Fatlow Zalukhu, Budieli Putra Zebua , Siska Natalia Zebua, Andi Donal Zebua, Charles Septiawan Zendrato, Beril Fernando Zendrato, Martirah Warni