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Published by Universitas Sumatera Utara

ISSN : 26557576 EISSN : 23564725 DOI : https://doi.org/10.32734/jpt.

Core Subject : Agriculture,

Agriculture, Biological Sciences & Forestry

Tropical Agriculture Journal (JPT) is a peer-reviewed online journal of Agriculture Postgraduate Study Program Universitas Sumatera Utara (USU). Journal is a result of research, or scientific reviews of researchers, students and agricultural institutions, and others related to agricultural studies in the tropical region. Published in Indonesian and English language with 3 volumes/year (April, August, December). These articles are indexed by Google Scholar, PKP Indexing, RootIndexing, Portal Garuda, Indonesian Publication Index (Garuda Portal), One Search Perpustakaan Nasional, BASE (Bielefeld Academic Search Engine), and Directory of Research Journal Indexing (DRJI), JPT is member of AJPI (Association of Indonesian Agriculture Journal, and strives to be a means of periodic, accredited, national scientific publications or reputable international publications through.

Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)

Articles 378 Documents

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Quality Analysis of Simplicia Red Ginger (Zingiber officinale Var. Rubrum) Rhizome with Different Drying Temperature Farrel, Rizki; Aulawi, Tahrir; Darmawi, Ahmad
Jurnal Online Pertanian Tropik Vol. 7 No. 1 (2020): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Red Ginger is ginger that is often used as a basic ingredient of herbal medicine because of its high essential oil content and the spiciest taste. Part of the Red Ginger plant that is commonly utilized is a rhizome, to maintain the quality of ginger rhizome so as not to reduce the economic value, the fresh ginger rhizome is processed first before storing or selling, one of the ways is in the form of Simplicia. The purpose of this study was to obtain the best drying temperature for the quality of red ginger simplicia. The treatments given were drying at 90oC (W1), 100oC (W2), 110oC (W3), and 120oC (W4). The study design used a nonfactorial Complete Randomized Design (RAL) consisting of 5 replications. Drying using an oven that lasts for 300 minutes. Data were analyzed by analysis of variance and if it had the real effect it was followed by Duncan's test (DMRT). Observations made were water content, ash content, starch levels, oleoresin levels, and vitamin C. The best drying results are at a temperature of 120Â°C at a moisture content with an average value of 3.70%, a temperature of 90Â°C produces the best drying at ash content with an average value of 4.79%, the starch content of 55.72%, oleoresin content of 50.79% and vitamin C 7.67%. It can be concluded that drying using a temperature of 120Â°C results in a better quality of Simplicia red ginger rhizome in the water content. Whereas at Ash content, the starch levels, oleoresin levels, and vitamin C, the best temperature is in the drying treatment at 90Â°C. Â

Mapping Thickness and Maturity Level Of Peat in The Simpang Wie Village, East-Langsa Sub-district, Langsa City berutu, prekdisampangate; Iswahyudi; Siregar, Dolly S.
Jurnal Online Pertanian Tropik Vol. 7 No. 2 (2020): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Food needs become increasingly urgent along with the growth of populations. Indonesian particularly needs more land to be used or utilized to increase food productivity and to create field-work.This view is considered because of the decreasing mineral lands in Indonesian. By conducting a study on the mapping of the thickness and maturity level of peat, it can provide the usage of peatland regarding cultivated land. The result of mapping can appropriately be used to design land utilization and model of production system. This study was carried out at Simpang Wie Village, East-Langsa Sub-district, Langsa City, as known which is known as one of the Peatland areas in Langsa City. The study was conducted in December 2019. Survey method design was employed in this research while the research location was determined purposively, which means that it is directly chosen or purposively chosen because the location is a peatland. Data types applied by field observation in this study were primary and secondary data. In this study, This research requires four main following phases; (1)Preparation (2)Preliminary-Survey (3) Field-Implementation, and (4) Data Analysis/ Discussion. The research result shows that the peatland area width of 4.94 9 (Ha) was classified into two types peat thickness: Shallow/Thin Peat with thickness > 40-100 cm (1.95 Ha), and Moderate Peat with thickness of 101-195 cm (2.99 Ha). Based on the observation, the maturity Level of Peat also classified into two maturity levels, those are Hemic Maturity Level and Sapric Maturity Level. Therefore, the use of peatland area according to thickness and maturity level concluded that the thickness of 40-100 cm can appropriately be used to cultivate paddy-fields, palawijas and plantation crops (horticulture). Besides, the thickness of 101-195 cm can appropriately be used to cultivate plantation crops (horticulture), vegetable crops (olericulture), and fruit crops (fruticulture). At least, this land is suitable to be used for agricultural cultivation because it has hemic and sapric maturity level. Key words: peat, thickness, maturity level , hemic, sapric, cultivated land

Incubation Time of Liquid Organic Fertilizers and Doses of Nitrogen on Growth and Yield of Cherry Tomatoes (Lycopersicum esculentum) Widjajanto, Didik Wisnu; Kriswijayanto, Triyoga Budi; Sumarsono
Jurnal Online Pertanian Tropik Vol. 7 No. 2 (2020): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

ABSTRACT The aim of the experiment was to evaluate the effect of incubation time of liquid organic fertilizer and nitrogen doses on the growth and production of cherry tomatoes. The experiment was conducted at the sreen house of Department of Agriculture of Semarang City and at the Ecology and Crop Production Laboratory of the Faculty of Animal and Agricultural Sciences, Diponegoro University from May-September 2017. A completely randomized design of 3x3 factorial patterns was used throughout the experiment. The first factor consisted of the incubation time of liquid organic fertilizer 6, 12 and 18 days, respectively for I1, I2 and 13 treatments. The second factor was the doses of nitrogen that consisted of three levels 36, 72 and 180 kgN/ha as D1, D2 and D3 treatments, respectively. Observed data included plant height, fresh and dry weight of stover, harvest index, fruit production and fruit sets. Obtained data were analyzed statistically by using ANOVA and continued with the smallest significant difference test at 5%. On the basis of the experiment it may be concluded that all of LOF with different of incubation time at dose of 72 kg N/ha may be recommended for cherry tomatoes cultivation.

The Level of Land Suitability and Analysis of Lemongrass Farming in Krueng Meueh Sub-Watershed Aceh Province
Jurnal Online Pertanian Tropik Vol. 7 No. 1 (2020): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Lemongrass is one of the agricultural commodities that produce citronella oil and will be a better product if the cultivation is carried out on the right land in the right way. This study aimed to determine the land suitability classes and farming feasibility for community citronella crops. The research was conducted at the Krueng Meueh Sub-watershed,Â Aceh from April to June 2019. The research was done in descriptive survey methods of forming a land mapping unit (LMU) of the study area. The LMU was obtained from an overlay of a soil map, slope map, and land use map with software ArcGis version 10.1. The soil characteristic data of each LMU and climate data were used for assessing land suitability classes, and to find out the level of farming feasibility of lemongrass in the study area with calculating values of Benefit-Cost Ratio (B/C), Internal Rate of Return (IRR), Net Present Value (NPV) and Break-Even Point (BEP). The result showed that the study area was considered suitable for lemongrass (S2 and S3). Classes of S2 were found at LMU 7 and 17 with base saturation (BS), soil pH, slope, and erosion hazard (EH) as constraint factors. While the other LMU is S3 class with soil pH, BS, organic-C, and EH as a constraint of lemongrass cultivation. The effort of land improvement for lemongrass in the study area such as liming, organic matter, and water-retaining pit or mounds. The lemongrass farming in the study area is feasible and profitable, based on values of NPV Rp.7,076,030, Net B/C 1.2, IRR 16%, and BEP 4 years 4.8 months 24 days. Analysis of Land Suitability andÂ Lemongrass Farming In Krueng Meueh Sub-Watershed Aceh Province Â

Growth and Production of Sweet Corn (Zea mays var. Saccharata) with Organic and Anorganic Fertilizer in Kendal Qurrota Ayunin Diananda; Lukiwati, Dwi Retno; Sutarno
Jurnal Online Pertanian Tropik Vol. 7 No. 2 (2020): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

This study aims to examine the response of growth and production of sweet corn plants in application of organic and inorganic fertilizers. The research was conducted on July - October 2019 in Merbuh Village, Singorojo Sub-District, Kendal DistrictÂ and at Ecology and Plant Production Laboratory, Faculty of Animal and Agricultural Sciences, Diponegoro University, Semarang. The study used a randomized block design with 7 monofactor treatments with and each experimental unit was repeated 4 times.Â The treatments consisted of inorganic fertilizer (P0), chicken manure+inorganic (P1), goat manure+inorganic (P2), cow manure+inorganic (P3), chicken manure â€˜plusâ€™ (P4), goat manure â€˜plusâ€™ (P5), cow manure â€˜plusâ€™ (P6). Data were analyzed by variance and for treatments that showed signoficant differences further tests were carried out using DMRT at the 5% level. The observed variables were plant height, number of leaves, stalk diameter, cob production with cornhusk, and cob production without cornhusk. The results showed that the application of organic and inorganic fertilizers only affected stalk diameter. Stalk diameter in cow manure+inorganic gave the highest results compared to other treatments.Â There is Â no influence on variables observed shows that the addition of gamal leaves as a source of N-organic and phosphate rock (BP) as P-organic in manure plus (chicken, goat, cow) can be an alternative solution to substitute inorganic fertilizers (urea and TSP) on sweet corn plant.

Characteristics of Chemical Properties of Oil Palm Soil at Plant Age in Different Areas of Land FS, Harahap; Rendi Fitra, Yana
Jurnal Online Pertanian Tropik Vol. 7 No. 2 (2020): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

This study aims to identify the fertility variable that is an obstacle in Bilah Hulu Subdistrict, Labuhanbatu Regency by evaluating the status of soil fertility and assessing alternative management in accordance with the status of soil fertility found in the Center of the People's Palm Oil Plantation, N Satu Aek Nabara Village, Bilah Hulu District, Labuhanbatu Regency with a height of Â± 80 meters above sea level. This research is a phenomenological qualitative descriptive study with a land survey and is supported by qualitative laboratory analysis. Soil sampling is carried out in the survey area sequentially based on where the estimated nature of the soil is different from the purposive random sampling method, so the results of the soil analysis obtained are expected to reflect the true value. 60 cm and recording the coordinates using the Global Positioning System. Whereas soil management information is obtained by direct field observation and in-depth interviews with farmers in a snowball aiming to obtain complete information from farmers. Soil chemical properties analyzed in C-organic laboratory, CEC, Base Saturation. To determine the chemical properties of the soil with certain criteria that have been determined. Based on Technical Instructions for Evaluating Soil Fertility. Soil fertility parameters that become obstacles in the status of soil fertility in N Satu Aek Nabara Village, Bilah Hulu District, Labuhanbatu Regency are low soil organic matter content, and very low soil fertility. The direction of management of soil fertility for sloping land units in the lower, palm, and peak areas of palm oil is in the form of adding organic matter with compost and fertilizer and inorganic substances in accordance with recommendations to improve soil fertility status.

Hedonic Attributes of Mussels Sauce as Seasoning : Kajian Uji Kesukaan Saus Kerang sebagai Seasoning Yusfiani, Marnida; Diana, Ayu; Ridhayani, Ahyani; Harahap, Muchsin; Syakura, Abd.
Jurnal Online Pertanian Tropik Vol. 7 No. 2 (2020): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

ABSTRACT North Sumatera east coastal, had abundance the type of mussels. The mussels processed limitless as daily dish. Diversification is required the mussels process to become mussels sauce. The aim of the research is to know the panellists acceptance of the mussels sauce. The experimental methods are used in this research with 3 treatments and 3 repetition. The different of mussels were A1, Anadara granosa; A2, Perna viridis; and A3, Anadara cunearca. Hedonic formulation, the research parameter. SNI 01.2346-2006 the hedonic formulation and ANOVA, was performed to analyse the data. The result showed that the mussels sauce product that can be accepted by panellists A21 treatment, which score 4,79 at like level specification. In after taste parameter, A2 had significant effect (p > 0,05). Keywords: mussels, mussels sauce, hedonic, after taste, seasoning. ABSTRAK Pesisir pantai timur Sumatera Utara, memiliki kelimpahan berbagai jenis kerang-kerangan. Olahan kerang terbatas sebagai lauk untuk dikonsumsi sehari â€“ hari. Perlu dilakukan diversifikasi olahan kerang menjadi saus kerang. Penelitian ini bertujuan untuk mengetahui tingkat penerimaan panelis terhadap saus kerang. Metode eksperimen yang digunakan dengan 3 perlakuan dan 3 pengulangan. Jenis kerang yang berbeda yaitu A1, Kerang darah (Anadara granosa); A2, Kerang hijau (Perna viridis); dan A3, Kerang bulu (Anadara cunearca). Â Parameter pengamatan yaitu uji hedonik. Analisis data menggunakan SNI 01.2346-2006 formulasi hedonik dan Analysis of Varians (ANOVA). Hasil penelitian diperoleh produk yang dapat diterima oleh panelis pada uji kesukaan adalah pada perlakuan A21, dengan nilai 4,79 spesifikasi suka. Pada uji setelah rasa, A2 memberikan pengaruh nyata (p > 0,05). Kata Kunci: Kerang, saus kerang, tingkat kesukaan, setelah rasa, seasoning.

Endophytic Fungi Producing Indole Acetic Acid from Melastoma malabathricum L. and Rhodomyrtus tomentosa (Aiton) Hassk. In Indonesia
Jurnal Online Pertanian Tropik Vol. 7 No. 2 (2020): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Melastoma and Rhodomyrtus are known to have widespread distribution and considered as medicinal plants in Indonesia. However, information about the diversity of endophytic fungi in Melastoma malabathricum (MM) and Rhodomyrtus tomentosa (RT) is limited and their potential as an alternative source of indole acetic acid (IAA) has never been reported before. The purpose of this study was to determine the diversity of endophytic fungi from MM and RT which have the potential as an alternative source of IAA and potentially induce the germination of Capsicum annuum L. seeds. The research consisted of isolation of endophytic fungi, IAA production analysis, and capsicum seed germination test. Samples of MM and RT were obtained from Kelubi, East Belitung, Indonesia on August 7th, 2017. Endophytic fungi were isolated from various organs including : leaves, roots, stems, flowers, and fruits using surface sterilization method on the Malt Extract Agar (MEA). After purification, a total of 33 fungi were obtained (15 isolates from MM and 18 isolates from RT). Each endophytic colony shows unique and varied colony on a PDA medium. 17 endophytic fungal isolates in this study tested positive for IAA production. All strains produced different levels of IAA, where MIVA2, MIVD1, and MIVA3 had the highest levels of IAA concentrations (89 ppm, 82 ppm, and 70 ppm respectively). In the term of germination, there were 5 isolates which have high potential in inducing Capsicum annuum L. seeds, namely; MIVA3, MIVF3, RIVD2, RIVD5, RIVD6, RIVD9 (90%, 95%, 100%, 90%, 100%, 90%, respectively).

Potential Of Bintaro (Carbera Odollam Gaertn) , Amethyst (Brugmansia Candida Pers) And Babandotan (Ageratum Conyzoides L) As A Biopesticide Against Pest Leptocorisa Acuta On Rice Plants Wizni , Fadhillah; Rini, Susanti; Lisdayani
Jurnal Online Pertanian Tropik Vol. 7 No. 2 (2020): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Abstract Rice plants (Oryza sativa) is a crop of the main food commodities in Indonesia. Rice production continues to be improved to meet the needs of the community, however, efforts to increase rice production still faces problems, namely Hama walang sangit Leptorisa acuta.. One alternative to control insect pests Leptorisa acuta relatively safe, inexpensive, and easily obtained is the utilization of botanical insecticides. One of them is by using plants Bintaro (Carbera odollam Gaertn), Amethyst (Brugmansia candida Pers) and Babandotan (Ageratum conyzoides L) vegetable insecticides. This study aimed to determine the effectiveness of Bintaro (Carbera odollam Gaertn), Amethyst (Brugmansia candida Pers) and Babandotan (Ageratum conyzoides L) in controlling the Pest Leptocorisa acuta. This study uses the RAL Non-Factorial with 6 Level of treatment and 5 replications. From the results obtained that the treatment with the use of plants kacubung can suppress the population of pest Leptocorisa cut by 100% by the time of application for 1 day after application. Of this study are expected in the future can use kacubung as insecticides with different pests so that in the future kacubung can be used as a vegetable insecticide that is environmentally friendly, economical, and right on target.

Potency Microbial Unicellular Filoplan Chili and Its Inhibitory to Collectotrichum capsici Causal Antraknose Disease on Chili (Capsicum annuum L.) Tanzil, Ahmad Ilham; Djauhari, Syamsuddin; Sulistyowati, Liliek
Jurnal Online Pertanian Tropik Vol. 7 No. 2 (2020): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

This study was conducted to isolate filoplan unicellular microbes which have antibiosis ability and characterize the secondary metabolite produced to inhibit Collectotrichum capsici in-vitro. This research was conducted at the Departement Plant Pest and Diseases, University of Brawijaya. Microbe isolated from the surface of chilies in a different age. Isolates microbes were tested for antagonistic potential against C. capsici. The persistence of the potential antagonist under different conditions of pH, temperature, and the light was also examined. An antagonist test was conducted to confirm the antibiosis mechanism. Furthermore, extracts were characterized using pH, light exposure, and temperature. The most potential antagonist was identified as isolate C3C with 36.20% inhibition. pH 5, 350C temperature, and light exposure of 0% is the best media optimization with the percentage of inhibition 37.5%, 38.2%, and 42.3%.

Page 25 of 38 | Total Record : 378

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Home Page

OAI Link

Editorial Team

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Reviewer

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Contact Name Benny Hidayat

Contact Email bendayat@gmail.com

Phone +6281396675484

Journal Mail Official jpt@gmail.com

Editorial Address 03, Prof. A. Sofyan Street Campus USU, Medan 20155- Indonesia

Location Kota medan, Sumatera utara INDONESIA

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Contact Name
Benny Hidayat

Contact Email
bendayat@gmail.com

Phone
+6281396675484

Journal Mail Official
jpt@gmail.com

Editorial Address
03, Prof. A. Sofyan Street Campus USU, Medan 20155- Indonesia

Location
Kota medan,

Sumatera utara

INDONESIA