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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.
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Articles 11 Documents
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Search results for , issue "Vol.10, No.1, Januari 2021" : 11 Documents clear
Evaluasi Status Kesuburan Tanah Sawah Berbasis Sistem Informasi Geografis (SIG) di Beberapa Subak Kecamatan Mendoyo Kabupaten Jembrana HASBI MAULANA; A.A. NYOMAN SUPADMA; GUSTI PUTU RATNA ADI
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.10, No.1, Januari 2021
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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Evaluation of Rice Field Fertility Status Based on Geographical Information System (GIS) in Several Subak, Mendoyo District, Jembrana Regency Research on Evaluation of Rice Field Fertility Status Based on Geographical Information System (GIS) in Several Subaks of Mendoyo District, Jembrana Regency, was conducted in December 2019 - May 2020. The purpose of this study was to determine the status of soil fertility and what fertility parameters are the limiting factors. provide directions on the management of soil fertility in accordance with the status of soil fertility and making maps of soil fertility status in several subaks of Mendoyo District. The method used in this research includes Survei and soil testing methods at the Laboratory of Soil and Environmental Sciences, Faculty of Agriculture, Udayana University. This research begins with making a map of homogeneous land units by overlaying a map of soil types; slope map of slopes; a scale of 1: 25,000. Then twelve homogeneous land units were obtained and the soil samples were taken by purposive sampling and analyzed the chemical properties of the soil in the laboratory which included: CEC; BS; Organic C; total P and K of soil. The soil fertility status is evaluated according to the PPT technical guidelines (1995). The results showed that the soil at the study location had two soil fertility statuses, namely high and medium soil fertility status. Locations that have moderate fertility are SLH I (Subak Tibubeleng), III (Subak Tibubeleng), VI (Subak Telepus), VII (Subak Tegal Gintungan), X (Subak Jagaraga), XI (Subak Telepus), and XII (Subak Jagaraga). While high fertility status is found in SLH II (Subak Tibubeleng), IV (Subak Tibubeleng), V (Subak Tegal Gintungan), VIII (Subak Tibubeleng), and IX (Subak Jagaraga). The soil fertility parameter that becomes an obstacle in the status of soil fertility in the location of this study is the low organic-C content. The direction of soil fertility management for SLHs with low C-organic content is the addition of organic matter and P fertilizers to increase the soil fertility status.
Halaman Depan JAT Vol. 10, No. 1, Januari 2021 Pengelola JAT
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.10, No.1, Januari 2021
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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Abstract

Halaman Depan JAT Vol. 10, No. 1, Januari 2021
Pendugaan Produksi Padi Menggunakan Citra Sentinel-2A di Kabupaten Tabanan I MADE ALIT WIRANATHA; I WAYAN NUARSA; I KETUT SARDIANA
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.10, No.1, Januari 2021
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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Estimation of Rice Production Using Sentinel-2a Image in Tabanan Regency Rice is strategical commodities because rice is a primary food in Indonesia. Thus, the estimation of rice production becomes crucial to do before the time of harvest to determine the availability of food. The objectives of this study were (1) developing of estimation equation model using Sentinel-2A imagery, (2) estimating rice field production using Sentinel-2A imagery, and (3) testing the accuracy of rice production estimation results using images Sentinel-2A. The research area is located in Tabanan Regency. Analysis of the research is done by the analysis of the single band and vegetation indices of Sentinel-2A satellite imagery. Estimation model of rice production developed by finding out the relationship between the satellite imagery data and the rice production data. Finally, accuracy test of the rice production estimation model is done using t test and regression analysis. The result of the study shows that the Normalized Difference Vegetation Index (NDVI) has the best relationship with the rice age and then used for the rice production estimation. The equation of rice production estimation is y = 7,7429ln (x) + 11,147, where y is the rice production in ton/ha and x is the value of NDVI of Sentinel-2A imagery in rice age range of 57 to 67 day after transplanting. The results of the accuracy test showed that the model obtained is suitable for estimating rice production with the accuracy level of 84,59% and a standard error of estimated production of ± 0,7463 ton/ha. Based on the research results, it can be concluded that the Sentinel-2A satellite imagery can be used to estimate the rice production with the enough accuracy. The results are expected to be a reference in estimating rice production in Tabanan Regency.
Pemetaan Lahan Sawah Berbasis Sistem Informasi Geografis di Subak Petangan dan Subak Pakel II, Desa Ubung Kaja, Kecamatan Denpasar Utara DANIEL VALENTINO SIRAIT; I GUSTI PUTU RATNA ADI; IDA BAGUS PUTU BHAYUNAGIRI
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.10, No.1, Januari 2021
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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Mapping of Subak Rice Fields Based on Geographical Information Systems in Petangan Subak and Pakel II Subak in Ubung Kaja Village, North Denpasar District Subak Petangan and Subak Pakel II are rice fields that have the potential to experience land use change. Based on data from the Central Statistics Agency (BPS) of Bali Province in 2017, the area of ??rice fields in Denpasar City has decreased by an average of 31.86 ha/year or decreased by around 1.28% per year. It is feared that it will experience a decline in the next 5 years. To anticipate further land use changes, a Regional Regulation (Perda) is required for the Protection of Subak Land as an LP2B Area, and is set forth in a Detailed Spatial Plan (RDTR). The purposes of research: knowing the area of ??subak Petangan and Subak Pakel II rice fields, knowing the subak designated in the RTHK area, making a GIS based information database on the potential of subak. According to the RTRW for the City of Denpasar (2011-2031), RTHK in urban areas is at least 30% of the city area. The area of ??Subak Pakel II which is in the RTHK of Denpasar City is 28.3 ha and is designated as a sustainable subak. Based on this, it is necessary to carry out a mapping of paddy fields in Subak Petangan and Subak Pakel II so as to facilitate planning, implementation, monitoring and evaluation of LP2B. The digitization results show that the area of ??Subak Pakel II is 49 ha, while the area of ??Subak Petangan is 36 ha. The area of ??subak rice fields in the RTHK area is 35.6 ha, namely in Subak Pakel II. The area of ??subak non-rice fields in Subak Pakel II is 7.3 ha. Subak land area that is not in the RTHK area is in Subak Pakel II, which is 21 ha.
Aplikasi Sistem Informasi Geografis untuk Analisis Potensi Daerah Resapan Air di Kecamatan Buleleng RIO PUTRA NUSANTARA PARDEDE; I NYOMAN DIBIA; WIYANTI WIYANTI
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.10, No.1, Januari 2021
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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Application of Geographic Information Systems for Analysis of the Potential of Watersheds in Buleleng District The research was conducted in Buleleng Subdistrict and lasted from December 2019 to April 2020. The purpose of this study was to determine the potential for water catchment in the study area and determine the distribution of potential water catchment in the study area. The method used is a scoring method with parameters used are soil type, land use, slope and rainfall. The results showed that the potential grade of water catchment areas consisted of rather good, moderate, bad, rather bad, and very bad classes. The potential for water infiltration in the study area is dominated by a rather bad class of 2.305,66 ha (49.11%), then followed by a very bad class of 1.130,75 ha (24.08%), a bad class of 1.088,51 ha (23 , 18%), the class is rather good at 112,35 ha (2.39%) and middle class at 56,73 ha (1.20%).
Pemetaan Status Kesuburan Tanah Sawah Berbasis Sistem Informasi Geografis di Subak Buaji dan Subak Padanggalak Kecamatan Denpasar Timur ELDO GABRIEL SIREGAR; I GUSTI PUTU RATNA ADI; A.A. NYOMAN SUPADMA
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.10, No.1, Januari 2021
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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The Mapping of Paddy Soil Fertility Status Based on Geographic Information System in Subak Buaji and Subak Padanggalak, East Denpasar District This study aims to evaluate the status of soil fertility and provide management measures for limiting factors as well as making maps of soil fertility status in Subak Buaji and Subak Padanggalak, East Denpasar District. The method used in soil sampling in the study area is the survey method by first creating a homogeneous land unit obtained by overlaying several thematic maps such as semi-detailed soil maps, slope maps and subak maps, then each homogeneous land unit is carried out several observation points and Soil sampling using purposive sampling method which is then composited. Soil samples that have been obtained are then analyzed in the laboratory for soil chemical properties including: Cation Exchange Capacity (CEC), Base Saturation (KB), C-Organic Soil, P-total, K-total. The results of the analysis of soil chemical parameters are then evaluated on their fertility status based on the PPT technical guidelines for mapping soil fertility status (1995). The results showed that in Subak Buaji and Subak Padanggalak, East Denpasar District, there were three classes of soil fertility status, namely low fertility class (R) found in SLH I.II (Subak Padanggalak), medium fertility class (S) in SLH I.I (Subak Buaji ), while the high fertility class (T) is found in SLH II (Subak Buaji and Subak Padanggalak) and SLH III (Subak Padanggalak). The soil fertility parameter which is the limiting factor is the low P-total value. Management action to overcome these limiting factors is the addition of phosphorus fertilizers and organic fertilizers.
Efektivitas Pemberian Beberapa Jenis Herbisida terhadap Pertumbuhan Gulma dan Hasil Padi Sawah dengan Sistem Tanam Tabur Benih Langsung Tanpa Olah Tanah (TABELATOT) I KADEK ANGGA ARIMBAWA; I KETUT ARSA WIJAYA; IDA AYU MAYUN
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.10, No.1, Januari 2021
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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Effectiveness of Giving Some Herbicides on Weed Growth and Yield of Rice Plants with Direct Seed Sowing System without Ground (TABELATOT) One of the obstacles in rice cultivation is the presence of weeds. Weeds are plants that humans does not want in the located that can reduce agricultural yields. Weed control techniques in rice plants can be done by using herbicides. This study aims to determine the types of weeds that grow in rice cultivation with the tabelatot system for each type of herbicide used, to determine the effectiveness of each type of herbicide used on weed growth and lowland rice yield in the tabelatot system, to determine the type of herbicide. which one can increase the growth and yield of rice in a tabelatot planting system. This study used a randomized block design (RBD) with 4 treatments, namely control, logran herbicide, metafuron herbicide and benfuron herbicide. This treatment repeat six times. Based on the statistical results, it was found that the types of weeds that grew in rice cultivation were 2 (two) from grass groups, namely Echinochloa crusgalli (L.) Beauv, and Cynodon dactylon, 1 (one) from the nut group namely Cyperus difformis L, and 4 ( four) from broadleaf groups, among others, Monochria vaginalis (Burm.f.), Ludwigia octovalvis, Spenochlea zeylanica, and Limnocharis flava. The results showed that the herbicide treatment logran, metafuron and benfuron could reduce the weight of wet weeds m-2 at the age of 42 hss, 0.90 kg and 0.92 kg, respectively or decreased by 86%, 57% and 56% compared to the control, namely 2.13 kg and reduced the weight of oven dry weeds as much as 0.01 kg, 0.09 kg and 0.09 kg, respectively or decreased by 95%, 59%, and 59% compared with 0.22 kg without herbicide. he most effective herbicide in controlling weeds in the table cropping system is logran herbicide seen from the parameters of oven dry grain weight ha-1 (ton), the treatment of logran herbicides, metafuron and benfuron can produce weight of 5.31 tons, 5.28 tons respectively. and 5.25 tons or increased significantly by 65%, 64% and 63% compared to the control, namely 3.23 tonnes, the high yield was due to the ability of logran herbicides to suppress weed growth so as to minimize competition between rice and weeds.
Efek Pemberian Formulasi Pupuk Semi Organik dan Populasi Bayam Merah (Amaranthus spp. L) terhadap Hasil Bayam Merah dan Perubahan Sifat KimiaTanah Inceptisol GDE CAKRA WAHYU P; A.A. NYOMAN SUPADMA; I DEWA MADE ARTHAGAMA
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.10, No.1, Januari 2021
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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The Effect of Semi-Organic Fertilizer Formulation on Red Spinach Populations (Amaranthus spp.L) on Yield and Changes in Inceptisol Soil Chemical Properties This study aims to determine the proper formulation of organic, inorganic and biological fertilizers and the best population to increase the production of spinach on Inceptisol soil, as well as changes in soil chemical properties after harvest. This research was conducted from December 2019 to March 2020 in Samplangan Village, Gianyar Regency, using a pot experiment. The second stage is analysis the chemical properties of soil which is carried out at the Laboratory of Soil and Environmental Sciences, Faculty of Agriculture, Udayana University. The design used was a randomized block design (RBD) with nested patterns with 5 formulations and 2 different populations with 3 replications. F0 = without fertilizer (control), F1 = (3 tons of compost + 350 kg of urea + 5 cc of biofertilizer. 1 l-1 water) hectare-1, F2 = (6 tons of compost + 300 kg of urea + 10 cc of biofertilizer. 1 1-1 water) hectare-1, F3 = (9 tons of compost + 250 kg urea + 15 cc of biofertilizer. 1 l-1 water) hectare-1, F4 = (12 tons of compost + 200 kg of urea + 20 cc of biofertilizer. 1 l-1 water) hectare-1, P1 5 plants and P2 10 plants. Treatment F2 and F3 produced the highest fresh weight compared to control in population P1, while in population P2 treatment F3 produced the highest fresh weight. Provision of semi-organic fertilizer formulations can increase the content of nutrient elements contained in the soil after harvest.
Uji Aktivitas Antijamur Bacillus cereus terhadap Colletotrichum fructicola KRCR Penyebab Penyakit Antraknosa pada Buah Cabai Rawit (Capsicum frutescens L.) KRISNA SANUBARI PURBA; KHAMDAN KHALIMI; NI WAYAN SUNITI
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.10, No.1, Januari 2021
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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Test of Antifungal Activity of Bacillus cereus Against Colletotrichum fructicola Causing Anthracnose Disease in Cayenne Pepper (Capsicum frutescent L.) Anthracnose or fruit rot disease that attacks ceyenne pepper is caused by the pathogenic fungus Colletotrichum fructicola, this disease can cause crop failure. Currently, control of this disease is still using synthetic fungicides, but this method can cause demage to the ecosystem. Biopesticides are one of the enviromentally friendly control of plant phatogens because biopesticides use biologycal agents. The purpose of this study was to determine the ability of B. cereus bacteria to inhibit the growth of C. fructicola KRCR cause anthracnose desease in vitro. The result showed that bacteria B. cereus was able to inhibit the growth of fungal colonies C. fructicola KRCR on potato dextrose agar (PDA) with an inhibitory percentage of 90.55% when compared to controls. The results of the B. cereus filtrate test a concentration of 50% is able to inhibit the growth of C. fructicola KRCR with an inhibitory percentage of 87.56%.
Analisis Kebutuhan Ruang Terbuka Hijau Berdasarkan Kebutuhan Oksigen Menggunakan Teknologi Penginderaan Jauh di Kabupaten Badung ANAK AGUNG PLASA PADMAWATI; I WAYAN NUARSA; I KETUT SARDIANA
Jurnal Agroekoteknologi Tropika (Journal of Tropical Agroecotechnology) Vol.10, No.1, Januari 2021
Publisher : Program Studi Agroekoteknologi, Fakultas Pertanian, Universitas Udayana

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Analysis Of Need For Green Open Space Based On Oxygen Needs Using Remote Sensing Technology In Badung Regency Badung Regency is one of the regencies in Bali Province which has a quite rapid development. Total population of Badung regency in 2018 was 656.90 thousand people with population growth rate of 4.64 % which is the highest growth rate in Bali Province. The objective of this research is (1) to map the percentage of green open space in Badung Regency using Sentinel-2A satellite imagery, (2) to analyze the oxygen needs of Badung regency, and (3) to evaluate the need of green open space in Badung regency based on availability of green open space and the need for oxygen. This study was a descriptive quantitative research who utilize remote sensing technology using the satellite imagery of Sentinel-2A and Gerarkis methods. The methods of sample collection was stratified random sampling with the number of sample is 76. The estimated density of vegetation derived from a comparison between the five indices of vegetation that is NDVI, RVI, DVI, TVI, and SAVI. The result of study shows that the SAVI is the best vegetation index for green open space estimation based on the determination coeffecient (R2) value. The t-test paired confirm as well that there are no significant different between green open space obtaining from estimation using Sentinel-2A satellite imagery and direct measurement on high-scale images. The estimation result of vegetation density indicates that the vast green open space in Badung Regency in 2019 was 22.930,67 ha. The extent of the need of green open space based on oxygen demand by residents, vehicle, and livestock in 2019 is 7.516,34 ha.

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