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E-Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology)
Published by Universitas Udayana
ISSN : 23016515     EISSN : -     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
E-Jurnal Agroekoteknologi Tropika (JAT) adalah peer-reviewed, open access jurnal, diterbitkan oleh Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana. JAT menerbitkan hasil peneitian original dan review artikel dalam bidang Ilmu tanah dan lingkungan, Agronomi, hama dan penyakit tumbuhan, dan arsitektur lanskap. Penulis diharapkan mengimkan karya tulisnya yang belum pernah dipublikasikan, sedang di-review atau sedang dipertimbangkan untuk diterbitkan di jurnal atau media lain secara lengkap. Ruang lingkup JAT mencangkup, tetapi tidak terbatas pada bidang berikut: kimia dan kesuburan tanah, biologi tanah, fisika dan konservasi tanah, manajemen suberdaya lahan, pengendalian hama dan penyakit terpadu, hama tanaman, penyakit tanaman, biopestisida, bioteknologi tumbuhan, agronomi dan hortikultura, benih dan pemuliaan tanaman, ekofisiologi, dan arsitektur lanskap.
Arjuna Subject : -
Articles 15 Documents
 1   2 
Search results for , issue "Vol.10, No.3, Juli 2021" : 15 Documents clear
Pemanfaatan Bakteri Azotobacter untuk Meningkatkan Efisiensi Penggunaan Pupuk Urea pada Tanaman Padi (Oryza sativa L.) NI MADE INDRA PUSPAWATI; KHAMDAN KHALIMI; GUSTI NGURAH ALIT SUSANTA WIRYA
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.10, No.3, Juli 2021
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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Abstract

Utilization of Azotobacter Bacteria to Increase the Efficiency of Urea Fertilizer Use in Rice Plants (Oryza sativa L.) Rice is a food plant in the form of grasses (Gramineae) originating from the tropical and subtropical continents of Asia and West Africa. Nearly half of the world's population, including Indonesia, uses rice as the staple food consumed to meet food needs. Based on BPS data, the population shows an increase every five years. It is inversely proportional to the decreasing total rice production. One of the efforts to improve the cultivation technology package and increase the quality of intensification is the use of Azotobacter bacteria as a biofertilizer. Based on the isolation results, 52 Azotobacter isolates were found grown on Abhys mannitol agar. Based on the results of the selection of Azotobacter bacterial isolates, it was found that four Azotobacter bacterial isolates had the best effect on root growth of rice plants, namely the Azotobacter PD3, PD23, PD48, and PD51 bacterial isolates. The test results with GC-MS showed that 2 compounds were thought to contribute to increasing the growth of rice plants. These compounds were n-Hexadecanoic acid and oleic acid, which were included in the fatty acid group. The isolates of the Azotobacter PD3, PD48, PD51 bacteria were able to increase the efficiency of using urea by 25-50%. In comparison, the PD23 bacteria were able to increase the efficiency of using urea by 25% based on the number of tillers.
Tingkat Perkembangan Nematoda Puru Akar (Meloidogyne spp.) pada Berbagai Jenis Tanaman Tomat Menggunakan Pengendalian Ekstrak Daun Kirinyuh KIKI AMELIA RAMADHANY; I MADE SUDANA; I DEWA PUTU SINGARSA
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.10, No.3, Juli 2021
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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Abstract

Development Rate of Root-Knot Nematode Meloidogyne spp. in Various Types of Tomato Plants Controlled with Siam Weed Extract The tomato plant, which is included in the Solanaceae family, is an annual herbaceous plant with a height between 70-200 cm, depending on the variety. Susenas (2012) reported that the average growth of tomato consumption in Indonesia in 2007-2011 is 2.1%. Based on data from the Central Statistics Agency (2005) in Taufik et al. (2014), tomato production in 2012 experienced a decrease in the amount of production from the previous year (2011), from 954,046 tons to 893,463 tons. Meanwhile, domestic demand for tomatoes in 2012 amounted to 904,000 tons, resulting in 10,537 tons of imported tomatoes (Pusdatin, 2014). One of the causes of the decline in tomato production is the disruption of plant pests, leading to failure. One of the diseases that attack tomatoes at all stages of growth is a root-knot disease caused by the nematode Meloidogyne spp. that live in plant nodules. Control of Meloidogyne spp. was done by using trap crops, crop rotation, and so on. In this study, we used biological control, using Siam weed leaf extract (Chromolaena Odorata L.). The results showed that the high level of development in tomato plant varieties could be known through the research data, including the number of roots and egg masses. The number of eggs indicated that the yellow cherry variety was higher than the varieties of red cherries, swadesi, serpo, and agata.
Uji Daya Hambat Jamur Antagonis terhadap Jamur Penyebab Penyakit Utama pada Tanaman Ubi Jalar Ungu (Ipomoea batatas (L.)) Secara In Vitro NI WAYAN EKA SUDI ARTI; NI WAYAN SUNITI; I DEWA PUTU SINGARSA
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.10, No.3, Juli 2021
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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Abstract

In Vitro InhibitionTest of Antagonistic Fungi on Pathogenic Fungi of the Main Diseases in Purple Sweet Potatoes (Ipomoea batatas (L.) Purple sweet potato is a plant commodity that is in great demand by people today. Peringsari Village, Selat Sub-district, Karangasem Regency is one of the sweet potato-producing areas in Bali. The purple sweet potato plant developed in Peringsari village shows many symptoms of the disease on the stems and leaves of the plant. The cause of the main disease of this plant is not yet known, but the symptoms shown are such as attack by pathogenic fungi. This purple sweet potato disease does not get much attention from farmers because it is considered to have no effect in terms of the quantity and quality of sweet potatoes. The purpose of this study was to determine the main pathogens that cause disease in purple sweet potato plants and to determine which antagonistic fungi are effective in suppressing the growth of pathogens in purple sweet potato plants in Peringsari Village, Selat District, Karangasem Regency. This research was conducted in Peringsari Village, Selat Subdistrict, Karangasem Regency for sampling to be continued at the Plant Disease Laboratory, Faculty of Agriculture, Udayana University. Field observations, isolation, and morphological identification showed that the main disease-causing pathogen in purple sweet potato was the fungus Fusarium sp. and the antagonistic fungi that can control pathogenic fungi in vitro are Trichoderma asperilum, Trichoderma harzianum, Trichoderma koningii, and Trichoderma viride.
Pengaruh Jenis Media Tanam dan Varietas terhadap Hasil Tanaman Melon (Cucumis melo L.) pada Sistem Irigasi Tetes I KADEK AGUS INDRAWAN; I GUSTI ALIT GUNADI; I WAYAN WIRAATMAJA
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.10, No.3, Juli 2021
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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Abstract

The Effect of Planting Media and Varieties on the Yield of Melon (Cucumis melo L.) in Drip Irrigation Systems Melon (Cucumis melo L.) is a fruit crop including the family Cucurbitaceae. Melon is not a plant native in Indonesia but can grow in the tropical region. This fruit is very popular in the community and is often used by hotels as a welcome fruit. Badan Pusat Statistik's (2019) data stated that melon production in Bali increased in 2019 to reach 552.00 tons. This study aimed to obtain the appropriate planting medium for melon cultivation by drip irrigation systems in a greenhouse. The treatments consisted of three types of planting media: husk charcoal media, cocopeat, husk charcoal mixture with cocopeat, and melon varieties suitable for cultivation in a greenhouse using drip irrigation. The results showed the treatment of cocopeat could increase the development of melons. Cocopeat (Mc) can be increase the yield and quality of melons, and this can be seen in the fruit weight (1,214.50 g/plant) and total dissolved solid (11.87 0briks). Golden melon variety (Alisha F1) was able to produce sweeter fruit (11.97 0brix), but the fresh weight was lower (887.33 g / plant).
Identifikasi Bakteri Penyebab Penyakit Utama pada Tanaman Hidroponik DEWA AYU DIAH PUSPITASARI; I PUTU SUDIARTA; I MADE SUDARMA
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.10, No.3, Juli 2021
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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Abstract

Identification of Bacteria Causing the Main Diseases in Hydroponic Plants Hydroponics is a horticultural cultivation technique using water as its growing medium. As the times progressed, people began to switch to planting with a hydroponic system, but this system was not completely free from pathogen attacks, one of which was bacteria. Therefore, this study aims to identify the types of bacteria that can infect hydroponic plants and determine the percentage of disease in hydroponic plants. The research implementation includes (1) calculating the percentage of disease, (2) sampling, (3) symptomatic plant isolation, (4) inoculation, (5) morphological classification, (6) detection of bacteria by PCR (Polymerase Chain Reaction), and sequencing analysis. The results showed that the percentage of attack on three plants, namely lettuce with soft rot symptoms, was 31.6% and celery with bacterial blight symptoms was 56.1%. The highest attack percentage was on tomato plants with bacterial wilt symptoms, reaching 69.1%. PCR results showed DNA bands measuring ± 1500 bp using general 16S rRNA primers (27F forward and 1492R reverse) on the three plants. Sequence analysis was continued on bacterial isolates from tomato plants because they had the highest percentage of attack. The nucleotide analysis of bacterial isolates in tomato plants indicated that the bacteria were a genus of Pseudomonas sp. Homology level of Pseudomonas sp. from Kesiman Village, East Denpasar District, Bali, after being traced and matched to the GenBank data in the NCBI program, it has similar homology with Pseudomonas from Iraq and India with a homology level of 89.86%, as well as from Egypt, New Zealand, and Germany with a sequence homology level of 89.19%.

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