Jurnal Pertanian Tropik https://talenta.usu.ac.id/jpt <p align="justify"><span class="" lang="en"><span class="">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) in 20 Articles</span></span></p> <p align="justify"><span class="" lang="en"><span class=""><span id="result_box" class="" lang="en">Since Vol. 6, No. 3 of 2019, Jurnal Pertanian Tropik Journal moved to the https://talenta.usu.ac.id/jpt/ page facilitated by Talenta Publisher, University of Sumatra Utara, Medan, in order to improve the governance of scientific publications in the Open Journal System (OJS ) </span></span></span><span class="" lang="en"><span class="">ISSN (Print/ Online): 2356-4725/ 2655-7576</span></span></p> <p align="justify"><span class="" lang="en"><span class="">The journal of tropical agriculture has been accredited by the Ministry of Technology Research and Higher Education No. 21 / E / KPT / 2018</span></span></p> <p align="justify"> </p> en-US bendayat@gmail.com (Benny Hidayat) jpt@gmail.com (Muhammad Raju) Tue, 08 Sep 2020 08:48:22 +0700 OJS 3.2.0.2 http://blogs.law.harvard.edu/tech/rss 60 Potency Microbial Unicellular Filoplan Chili and Its Inhibitory to Collectotrichum capsici Causal Antraknose Disease on Chili (Capsicum annuum L.) https://talenta.usu.ac.id/jpt/article/view/4329 <p>This study was conducted to isolate filoplan unicellular microbes which have antibiosis ability and characterize the secondary metabolite produced to inhibit <em>Collectotrichum capsici</em> 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 <em>C. capsici</em>. 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, 35<sup>0</sup>C temperature, and light exposure of 0% is the best media optimization with the percentage of inhibition &nbsp;37.5%, 38.2%, and 42.3%.</p> Ahmad Ilham Tanzil Copyright (c) 2020 Jurnal Pertanian Tropik https://talenta.usu.ac.id/jpt/article/view/4329 Tue, 08 Sep 2020 00:00:00 +0700 Endophytic Fungi Producing Indole Acetic Acid from Melastoma malabathricum L. and Rhodomyrtus tomentosa (Aiton) Hassk. In Indonesia https://talenta.usu.ac.id/jpt/article/view/4316 <p><em>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&nbsp; indole acetic acid (IAA) </em><em>has never been reported before</em><em>. 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&nbsp; 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 7<sup>th</sup>, 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&nbsp; unique and varied colony on a PDA medium. </em><em>17 endophytic fungal isolates in this study tested positive for IAA production.</em><em> 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&nbsp; 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).</em></p> Ivan Permana Putra Copyright (c) 2020 Jurnal Pertanian Tropik https://talenta.usu.ac.id/jpt/article/view/4316 Tue, 08 Sep 2020 00:00:00 +0700 Hedonic Attributes of Mussels Sauce as Seasoning https://talenta.usu.ac.id/jpt/article/view/4309 <p><strong>ABSTRACT</strong></p> <p>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, <em>Anadara granosa</em>; A2, <em>Perna viridis</em>; and A3, <em>Anadara cunearca</em>. 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 A<sub>21</sub> treatment, which score 4,79 at like level specification. In after taste parameter, A<sub>2</sub> had significant effect (<em>p</em> &gt; 0,05).</p> <p><strong>Keywords</strong>: mussels, mussels sauce, hedonic, after taste, seasoning.</p> <p><strong>ABSTRAK</strong></p> <p>Pesisir pantai timur Sumatera Utara, memiliki kelimpahan berbagai jenis kerang-kerangan. Olahan kerang terbatas sebagai lauk untuk dikonsumsi sehari – 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 (<em>Anadara granosa</em>); A2, Kerang hijau (<em>Perna viridis</em>); dan A3, Kerang bulu (<em>Anadara cunearca</em>). Parameter pengamatan yaitu uji hedonik. Analisis data menggunakan SNI 01.2346-2006 formulasi hedonik dan <em>Analysis of Varians</em> (ANOVA). Hasil penelitian diperoleh produk yang dapat diterima oleh panelis pada uji kesukaan adalah pada perlakuan A<sub>21</sub>, dengan nilai 4,79 spesifikasi suka. Pada uji setelah rasa, A<sub>2</sub> memberikan pengaruh nyata (<em>p</em> &gt; 0,05).</p> <p><strong>Kata Kunci</strong>: Kerang, saus kerang, tingkat kesukaan, setelah rasa, <em>seasoning</em>.</p> Marnida Yusfiani Copyright (c) 2020 Jurnal Pertanian Tropik https://talenta.usu.ac.id/jpt/article/view/4309 Tue, 15 Sep 2020 00:00:00 +0700 Mapping Thickness and Maturity Level Of Peat in The Simpang Wie Village, East-Langsa Sub-district, Langsa City https://talenta.usu.ac.id/jpt/article/view/3964 <p><em>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 &nbsp;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&nbsp; (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 &gt; 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&nbsp; 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&nbsp; 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</em>.</p> <p><em>Key words</em>: <em>peat, thickness, maturity level , hemic, sapric, </em><em>cultivated</em><em> land</em></p> prekdisampangate berutu Copyright (c) 2020 Jurnal Pertanian Tropik https://talenta.usu.ac.id/jpt/article/view/3964 Sun, 20 Sep 2020 00:00:00 +0700