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All Journal Agrikultura JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA Seminar Nasional Lahan Suboptimal
Sitorus, Alfonso
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Keragaan Pertumbuhan dan Produksi Jagung Hibrida pada Agroekosistem Lahan Kering Iklim Kering Nusa Tenggara Timur Sitorus, Alfonso; Kotta, Noldy Rusminta Estorina; Hosang, Evert Yulianes
Seminar Nasional Lahan Suboptimal 2020: Prosiding Seminar Nasional Lahan Suboptimal ke-8 “Komoditas Sumber Pangan untuk Meningkatkan
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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Sitorus A, Kotta NRE, Hosang EY.  2020. Performance of hybrid maize growth and production on dry land and dry climate agroecosystem of east Nusa Tenggara province. In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal ke-8 Tahun 2020, Palembang 20 Oktober 2020. pp. xx.  Palembang: Penerbit & Percetakan Universitas Sriwijaya (UNSRI).Corn is an important commodity in East Nusa Tenggara (ENT) because it is the main staple food for most people besides rice, but its productivity is still relatively low. One of solution to increase maize productivity is the use of high-yielding hybrid maize varieties, but their performance under dry land and dry climates of ENT is still unknown. The purpose of this study was to determine the performance of various hybrid maize varieties on dry land and dry climate so that it can be used as a reference for farmers in ENT. The assessment was carried out in Oeteta Village, Sulamu District, Kupang Regency in January-April 2020. The hybrid maize varieties studied were Nasa 29, JH 27, JH 37, JH 45, Pertiwi 2, Pertiwi 5, Pertiwi 6, NK212, Pioneer P21, and NK7328 Sumo. The parameters observed were vegetative and generative growth. Data were analyzed using Analys of Variance at significance level 5% and further tested with the Tukey HSD test at significance level 5% to determine the differences between treatments. The results showed that the variety factor had a significant effect on maize production. Corn yields ranged from 5.67 tonnes/ha - 8.35 tonnes/ha with the highest yields on the Nasa 29 variety but not significantly different from Pertiwi 6, NK7328 Sumo, JH 27, and Pertiwi 5 in the Tukey HSD test at significance level 5%. The average B/C ratio for hybrid maize farming was 1.94. Varieties with B/C ratio value above the average consecutively, namely: Nasa 29, followed by Pertiwi 6, NK7328 Sumo, JH 27, and Pertiwi 5. Based on productivity considerations, hybrid maize varieties are well adapted and recommended to dry land and dry climate of ENT is Nasa 29, followed by Pertiwi 6, NK7328 Sumo, JH 27, and Pertiwi 5.
Mengkaji Peluang Jagung Hibrida Nasa-29 Meningkatkan Produksi Jagung di Lahan Kering Kabupaten Kupang Sitorus, Alfonso; Menge, Dominika
Seminar Nasional Lahan Suboptimal 2021: Prosiding Seminar Nasional Lahan Suboptimal ke-9 “Sustainable Urban Farming Guna Meningkatka
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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Sitorus A, Menge D. 2021. Assessing opportunities of Nasa-29 hybrid maizes to increase yield in dryland of Kupang Regency. In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal ke-9 Tahun 2021, Palembang 20 Oktober 2021. pp. 125-133. Palembang: Penerbit & Percetakan Universitas Sriwijaya (UNSRI).Maize is one of the most important staple crops in East Nusa Tenggara (ENT). Maize is widely grown on dryland as food crop or animal feed. However, its productivity at both regency and provincial levels is still lower than the national average. One of the solution to increase maize productivity is using superior varieties such as Nasa-29 hybrid varieties which has high productivity. The purpose of this study was to examine the opportunities of using Nasa-29 hybrid maize to increase maize productivity in ENT. The study was carried out in Oeteta Village, Sulamu District, Kupang Regency. The study was carried out by making a Nasa-29 hybrid demonstration farm (demfarm) on 20 hectares dryland which spread over 5 farmer groups. During the 2019’s Dry Season (DS) demfarm covering an area of 7 hectares and 13 hectares on the 2020’s Wet Season (WS). Growth and production data were collected and analyzed statistically using Least Significant Difference (LSD) test at 5% level to exemine the significance of differences between the treatment means. Data of productivity, costs, and net income were used to calculate the B/C ratio. The results of the study showed that the production of hybrid maize in WS and DS was not significantly different based on the LSD test at the 5% level. Nasa-29 hybrid maize can increase productivity up to 181% compared to the existing condition  (2.59 t/ha) which were up to 189% on WS and 176% on DS. The B/C analysis showed that hybrid maize farming system was feasible (B/C ratio value > 1) which were 1.35 on DS and 2.65 on WS. So, it can be concluded that Nasa-29 hybrid maize potentially to increase corn production in ENT. 
Introduksi Varietas Unggul Baru Didukung Teknologi Pengelolaan Tanaman Terpadu (PTT) Meningkatkan Produktivitas Padi di Manggarai Barat Sitorus, Alfonso; Lumban Tobing, Jeannette Maryanty; Manurung, Erpina Delina; Purba, Hendri Ferianson; Hutasoit, Rudi Tomson; Purmanto, Dwi
Agrikultura Vol 35, No 2 (2024): Agustus, 2024
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/agrikultura.v35i2.54057

Abstract

Padi adalah bahan makanan pokok penting di Indonesia, tetapi produktivitasnya di Manggarai Barat, Nusa Tenggara Timur masih rendah. Penggunaan Varietas Unggul Baru (VUB) dengan Pengelolaan Tanaman Terpadu (PTT) merupakan salah satu kunci peningkatan produksi padi di NTT. Tujuan penelitian ini adalah menemukan varietas yang beradaptasi baik di Manggarai Barat dengan penerapan PTT untuk direkomendasikan sebagai alternatif pilihan petani. Penelitian dilaksanakan pada Mei-Agustus 2021 di Desa Compang Longgo Kecamatan Komodo Kabupaten Manggarai Barat. Budidaya menggunakan Rancangan Acak Lengkap. Perlakuannya adalah tiga VUB: Inpari 42 Agritan GSR, Inpari 48 Blas, Inpari IR Nutri zinc, dan satu varietas yang sudah tersebar luas Inpari 32 HDB sebagai pembanding. Semua varietas dibudidayakan dengan menggunakan paket teknologi PTT. Hasil menunjukkan bahwa perlakuan varietas berpengaruh nyata (P<0,05) terhadap variabel tinggi tanaman, anakan per rumpun, malai per rumpun, gabah per malai, gabah isi per malai, berat 1.000 butir, dan gabah kering giling (GKG), sementara variabel jumlah panjang malai tidak berbeda nyata (P>0,05). Hasil VUB yang diuji berkisar antara 6,87-7,28 ton GKG/ha lebih tinggi dibandingkan dengan varietas pembanding Inpari 32 HDB. Lebih lanjut, secara ekonomi penerapan VUB dengan teknologi PTT di Manggarai Barat layak diusahakan (B/C>1). Inpari 42 Agritan GSR, Inpari 48 Blas, Inpari IR Nutri Zinc dengan penerapan PTT mampu beradaptasi baik dan layak diusahakan di Kabupaten Manggarai Barat sebagai alternatif varietas untuk petani.
Biology and demographic statistics of the green leafhopper (Nephotettix virescens Distant) as the main vector of tungro virus in tungro-resistant rice varieties Hutasoit, Rudi Tomson; Widiarta, I Nyoman; Jihad, Muhammad; Sitorus, Alfonso; Susilawati, Susilawati; Puspitasari, Mahardika
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 25 No. 1 (2025): MARCH, JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA: JOURNAL OF TROPICAL PLANT PE
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jhptt.12596-105

Abstract

Tungro disease is one of the major constraints to rice production in Indonesia. Although tungro-resistant rice varieties have proven effective in reducing the spread of the virus, it is essential to consider their impact on the development of vector insect populations. This study aims to investigate the biology and demographic characteristics of Nephotettix virescens Distant on various tungro-resistant rice varieties. The research was conducted by maintaining and observing the development of N. virescens on the tungro-resistant varieties Inpari 7, Inpari 8, Inpari 9, Inpari 36, and Inpari 37, as well as the susceptible variety Taichung Native 1 (TN 1), under controlled environmental conditions with regulated temperature and humidity. Development was observed daily until the last individual died. The results indicated that the life cycle, longevity, and lifespan of N. virescens maintained on tungro-resistant varieties differed significantly from those on the susceptible variety TN 1. The life cycle of N. virescens on Inpari 7, Inpari 8, Inpari 9, Inpari 36, and Inpari 37 was 27.57, 30.50, 27.60, 30.80, and 31.64 days, respectively, whereas on the susceptible variety TN 1, it lasted only 24.94 days. Demographic statistical analysis revealed that the net reproductive rate (R?) and intrinsic rate of increase (r) of N. virescens maintained on tungro-resistant varieties were lower than those on the susceptible variety TN 1. Additionally, these tungro-resistant varieties resulted in a longer generation time (T) and doubling time (DT). Consequently, the tungro-resistant varieties negatively affected the vector by prolonging its life cycle, increasing the average generation time (T) and doubling time (DT), and reducing both the net reproductive rate (R?) and the intrinsic rate of increase (r). These five varieties can be considered as options for varietal rotation to suppress the growth of insect vector populations and limit the spread of the tungro virus, especially in tungro-endemic areas.
Co-Authors Hosang, Evert Yulianes Hutasoit, Rudi Tomson I Nyoman Widiarta Jihad, Muhammad Kotta, Noldy Rusminta Estorina Lumban Tobing, Jeannette Maryanty Manurung, Erpina Delina Menge, Dominika Purba, Hendri Ferianson Purmanto, Dwi Susilawati, Susilawati