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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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Performance of Odot Elephant Grass (Pennisetum purpureum cv. Mott) and Sweet Potato (Ipomoea batatas L.) Cultivated as Mixed Cropping Widjajanto, Didik Wisnu; Sumarsono, Sumarsono; Sutarno, Sutarno
Jurnal Online Pertanian Tropik Vol. 9 No. 1 (2022): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

ABSTRACT The study was aimed to evaluate the effect of spacing of Odot elephant grass (Pennisetum purpureum cv. Mott) and variety of sweet potato (Ipomoea batatas L.) on the growth and yield of these two plants in a mixed cropping system. A randomized block design in a 2 Ã— 4 factorial pattern with 3 replications was used in the study. The first factor was spacing of Odot elephant grass consisted of J1: 60 Ã— 90 cm and J2: 45 x 90 cm. The second factor was several varieties of sweet potato, namely V1: Pating-1, V2: Beta-2, V3: Kidal and V4: Papua Solossa. Parameters observed were plant height, dry matter production, crude protein and crude fiber content of Odot elephant grass, as well as production of tubers, dry matter of leaves, crude protein, crude fiber and brix content of sweet potato. The results showed that there was no significant effect of Odot elephant grass spacing on all parameters studied except plant height on the 5th week of observation. Meanwhile, there was a significant effect on all parameters observed due to the treatment of sweet potato varieties. It was concluded that Odot elephant grass may be mixed with various sweet potato varieties such as Pating-1, Beta-2, Kidal and Papua Solossa, especially if there were no pests attacking the Odot elephant grass at the beginning of its growth. Further research with a more varied spacing of Odot elephant grass spacing is highly recommended. Keywords: agricultural by-products; alternative feed; fiber; forage crops; protein ABSTRAK Penelitian bertujuan untuk mengevaluasi pengaruh jarak tanam rumput gajah Odot (Pennisetum purpureum cv. Mott) dan varietas ubi jalar (Ipomoea batatas L.) terhadap pertumbuhan dan hasil kedua tanaman pada sistem tanam campuran. Rancangan acak kelompok pola faktorial 2 Ã— 4 dengan 3 ulangan digunakan dalam penelitian. Faktor pertama adalah jarak tanam rumput gajah Odot terdiri dari J1:60 Ã— 90 cm dan J2: 45 x 90 cm. Faktor kedua adalah beberapa varietas ubi jalar yaitu V1: Pating-1, V2: Beta-2, V3: Kidal dan V4: Papua Solossa. Parameter yang diamati adalah tinggi tanaman, produksi bahan kering, kandungan protein kasar dan serat kasar rumput gajah Odot, serta produksi umbi, bahan kering daun, protein kasar, serat kasar dan kadar brix ubi jalar. Hasil penelitian menunjukkan bahwa tidak terdapat pengaruh nyata jarak tanam rumput gajah Odot terhadap semua parameter yang diteliti kecuali tinggi tanaman pada minggu ke-5 pengamatan. Terdapat pengaruh nyata pada semua parameter yang diamati akibat perlakuan varietas ubi jalar. Tidak ada pengaruh interaksi kedua perlakuan terhadap semua parameter yang diamati. Disimpulkan bahwa rumput gajah Odot dapat dicampur tanam dengan berbagai varietas ubi jalar seperti Pating-1, Beta-2, Kidal dan Papua Solossa, terutama jika tidak ada hama yang menyerang rumput gajah Odot pada awal pertumbuhannya. Penelitian lebih lanjut dengan jarak tanam rumput gajah Odot yang lebih bervariasi sangat disarankan. Kata kunci: hasil samping pertanian; pakan alternatif; protein; serat; tanaman pakan

Pembuatan Marinasi Udang Swallow (Penaeus merguiensis) Dengan Pengolahan Bumbu Yang Berbeda Ridhayani Lubis, Ahyani; Diana, Ayu; Hermanto; Muhajjir
Jurnal Online Pertanian Tropik Vol. 9 No. 1 (2022): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Shrimp is one of the most popular types of seafood. Processed in any way, such as fried, steamed, baked, or made into a salad, shrimp is still delicious to eat. Marinating is the process of soaking meat in a marinade, before it is further processed. This study aims to determine the level of consumer acceptance of the manufacture of swallow shrimp marinade with different spice processing based on the hedonic test and to determine the nutritional content of the best value from the hedonic test of shrimp marinade with different spice processing. The shrimp marinade research method was divided into three stages. The first stage is sample and material preparation, the second stage is making shrimp marinade and the third stage is hedonic and proximate testing of the marinade. The research treatment design used was a completely randomized design (CRD). The results of the study obtained the best value from the hedonic test of shrimp marinade with the criteria of appearance = 6.30, aroma = 6.46, texture = 6.46 and taste = 5.85. The results of the test of the nutritional content of the marinade were based on the best value of the hedonic test results, namely water content = 73.61%, ash content = 5.45%, fat content = 0.31, protein content 19.26% and carbohydrate content 1.38.Keywords: Swallowed shrimp, Marinated, Hedonic Test, Proximate Test

Quality and Consumers Acceptence of Shredded Rough Flathead Fish (Grammoplites scaber) Khoiriah; Fikri, Muhammad Zakiyul; Yusfiani, Marnida
Jurnal Online Pertanian Tropik Vol. 9 No. 1 (2022): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Shredded fish is a type of processed fish that is seasoned, processed by boiling and frying. The resulting product has a soft shape, good taste, special smell, and has a relatively long shelf life. This study aims to find out the level of acceptance of panelists through organoleptic test and find out the quality of shredded fish products from Rough flathead (Grammoplites Scaber) through proximate tests. the method used in this study consists of three stages. the first stage is the stage of making shredded fish. The second stage is organoleptic testing. next is the third stage of proximate testing. Organoleptic test results of shredded fish from Rough flathead (Grammoplites scaber) is 9.00 appearance, 8.66 smell, 8.48 taste, and 8.48 texture. The proximate test results of water content values of 12.20%, ash content of 6.93%, fat content of 19.01%, protein content of 22.93%, and carbohydrate content of 9.06%.

Response Growth and Development of Gambas Plant (Luffa acutangula L.Roxb) to Application of Manure and Trichoderma koningii Lubis, Elli Afrida; Rizwan, Muhammad
Jurnal Online Pertanian Tropik Vol. 8 No. 3 (2021): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Gambas is a plant that has several advantages. It contains protein, fat, carbohydrate, fiber and sugar which make it beneficial for people who consume it. In order to increase growth and production, fertilizer plays an important role in supplying the minerals or nutrients needed by plants. Manure, which is a mixture of solid dung, urine, and (plant) food waste, plays a very important role as a food source for soil organisms. Due to the various benefits and high economic value of the gambas plant, numerous efforts have been made to increase productivity and suppress the growth of pathogens that can interfere with gambas growth, one of which is the use of biological agents. The biological agents commonly used are from the fungi group. Trichoderma harzianum is one type of fungi that can be used as a biological agent. This study used a factorial group design consisting of two factors, with a 4x3 factorial pattern and 3 replications. The factors studied included types of manure and doses of Trichoderma fertilizer, which consisted of 12 levels, namely K0= control (un-fertilizer), K1= Goat Manure (2 kg/plot), K2= Chicken Manure (2 kg/plot), K3= Cow Manure (2 kg/plot), while the Trichoderma Fertilizer Factor (M) consisted of 3 levels, namely M0= Control, M1= Trichoderma (5 g/plot), M2= Trichoderma (10 g/plot). The results showed that the application of manure and Trichoderma koningii fertilizer had a significant effect on plant height, number of leaves and fruit weight of the sample/plot, which indicates that the application of both types of fertilizers can increase the content of organic matter in the soil.

Optimum Dosage of N Determination in achieve Optimization of Hybrid Rice Grain Contents Percentage Syarifah, Risqa Naila Khusna; Purwanto; Hanifa, Hana
Jurnal Online Pertanian Tropik Vol. 9 No. 1 (2022): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Padi hibrida mulai dikembangkan oleh para peneliti untuk mendukung peningkatan produksi padi nasional karena sifatnya yang dapat menghasilkan produksi lebih tinggi dibandingkan padi inbrida. Namun, di Indonesia peningkatan hasil panen padi hibrida belum sesuai harapan, salah satunya karena penerapan teknik budidaya yang kurang cermat, termasuk teknik pemupukan. Penelitian ini dilakukan untuk mengetahui dosis pemupukan nitrogen yang optimum pada padi hibrida yang dapat mendukung perolehan persentase gabah isi tertinggi. Penelitian ini menggunakan Rancangan Acak Kelompok Lengkap dengan dua faktor dan tiga ulangan. Faktor pertama adalah dosis pupuk N (0 kg N/ha, 100 kg N/ha dan 200 kg N/ha), faktor kedua adalah varietas padi hibrida (Mapan-P05, Intani 602 dan SL8SHS-Sterling). Variabel yang diamati meliputi karakteristik pertumbuhan (jumlah daun) serta hasil dan komponen hasil padi hibrida (jumlah gabah per malai, bobot gabah per rumpun, persentase gabah isi). Data penelitian dianalisis dengan analisis varians dan regresi polinomial. Hasil penelitian menunjukkan bahwa dosis pemupukan N optimum untuk varietas Mapan-P05, Intani 602 dan SL8SHS-Sterling adalah 98,79 kg N/ha (R2=0,805), 104,34 kg N/ha (R2=0,919) dan 99,78 kg N/ha (R2=0,809).

Laccase activity as an indicator of peat degrading microbes in several types of peatlands use in West Sumatra, Indonesia Hijri, Nurul; Naspendra, Zuldadan; Harianti, Mimien; Budi Prasetyo, Teguh
Jurnal Online Pertanian Tropik Vol. 9 No. 1 (2022): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Land clearing and drainage activities on peatlands had boosted the decomposition rate of organic matter, caused by an increase in soil temperature and soil microbial activity. Enzyme activity is a sensitive indicator to measure changes in the decomposition process. The enzyme activity associated with the decomposition of organic matter is Laccase. This research aimed to study Laccase as an indicator of lignin degradation in several types of peatland use in Pesisir Selatan, West Sumatra, namely forests, shrubs, oil palm plantations, agricultural land, and bare land. The Laccase activity was measured by using the ABTS method. The results of our study show that Laccase activity in several types of peatland use from the highest to the lowest follows the order: agricultural land (LP) 3.20 Î¼g.g-1.hour-1 > bare land (LT) 1.46 Î¼g.g-1.hour-1 > shrub (SB) 1.17 Î¼g.g-1.hour-1 > smallholder oil palm plantation (PSr) 0.66 Î¼g.g-1.hour-1 > private company oil palm plantation (PSs) 0.70 Î¼g.g-1.hour-1 > forest (H) 0.06 Î¼g.g-1.hour-1. Soil characteristics that affect the enzyme activity are water content, which is negatively correlated with the Laccase enzyme. The higher the water content in the peat material, the lower the Laccase activity. Therefore, it is necessary to control the soil water content high to prevent the rate of peat decomposition. Keywords: Laccase, enzyme, oil palm plantation, land use, peatland.

Potential of Terminalia catappa Leaf Extract as Bioherbicide on Mikania micrantha Seed Germination Syukran, Muhammad; Effendi, Arman; Herman
Jurnal Online Pertanian Tropik Vol. 9 No. 1 (2022): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Mikania micrantha is a weed that is commonly found on agricultural land. Environmentally friendly weed control can be done using bioherbicides because the materials used come from nature. Terminalia catappa contains secondary metabolites so that its bioactive compounds can be used as weed control. This study aims to determine the total secondary metabolite compounds of Terminalia catappa leaves and their effect on Mikania micrantha seed germination. This study used a factorial Completely Randomized Design (CRD). The first factor is various types of solvents aquadest, ethanol and methanol. The second factor was the concentration of the extract application 30%, 50%, 70% and repeated 3 times so that there were 27 experimental units. Data were analyzed using analysis of variance if it had a significant effect, further tests were carried out using 5% BNJ. The results showed that the Terminalia catappa leaf extract with distilled aquadest of 70% was able to prevent the seeds from germinating while the methanol and ethanol solvent extracts were able to inhibit the germination of Mikania micrantha seeds at an application concentration of 30%.

Characterization and Test of Endophytic Bacterial Isolates to Control Leaf Blight on Acacia Seeds (Acacia crassicarpa) BR SIAGIAN, ROMAYANJU; Puspita, Fifi; Ali, Muhammad; Alhusaeri, Bayo
Jurnal Online Pertanian Tropik Vol. 9 No. 1 (2022): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

ABSTRACT Acacia is a type of plant that recommended for development of industrial forest plantations (HTI) especially pulp and paper. According to Central Statistics Agency (2020), area of â€‹â€‹â€‹â€‹acacia HTI in Riau Province 2019 was 2,335,450 ha with a log output of 31,509,228m3 and total pulp export of 2,952.4 million US dollars. The need for paper pulp has increased every year. Problems in acacia nursery area is presence of disease caused by Xanthomonas sp. Bacterial leaf blight causes significant losses in procurement of acacia seedlings, so we need an alternative control with environmentally friendly and sustainable by utilizing potential of biological agents in controlling leaf blight. This aimed to study potential of endophytic bacterial isolates against bacterial pathogen Xanthomonas sp. by adopting a Completely Randomized Design (CRD). The results showed that there were 9 isolates of endophytic bacteria that had inhibitory power against Xanthomonas sp., bacterial isolates in hypersensitivity test did not show symptoms of necrosis in tobacco leaves, results of physiological and biochemical tests on levan test and VP test showed differences in reaction results on tested endophytic bacteria isolates and it was found isolate of endophytic bacteria B8 was effective as an antagonist agent in controlling disease. Keywords: acacia; characterization; endophytic bacteria; in vitro; in vivo; Xanthomonas sp.

A Study of Genetic Variability 30 Rice Genotypes (Oryza sativa L.) Using Some SSR (Simple Sequence Repeat) Markers Adrift Zn: Studi Variabilitas Genetik 30 Genotipe Padi (Oryza Sativa L.) Menggunakan Beberapa Marka SSR (Simple Sequence Repeat) Terpaut Zn Pangaribuan, Tiwi Rumondang; Syafiâ€™i, Muhammad; Azizah, Elia; Susanto, Untung; Pramudyawardani, Furry; Prastika, Desi
Jurnal Online Pertanian Tropik Vol. 9 No. 2 (2022): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Rice is one of the important commodities in indonesia. Analysis of rice genetic diversity is necesarry for the succes of the local rice variety program. This study aims to identify the genetic variability and kinship patterns of 30 rice genotypes (Oryza sativa L.) using six zinc-linked SSR (Simple Sequence Repeat) markers. The research was conducted in September - December 2021 at the DNA Laboratory of the Sukamandi Rice Plant Research Center. A total of 30 local rice genotypes with diverse Zinc content have been analyzed using laboratory experiments. The results showed that there were different allele variations (2 â€“ 8) among the genotypes tested with an average number of alleles of 4.5, while the average value of Polymorphism Information Content (PIC) amounted to 0.48 (0.20 - 0.70). 4 SSR markers have PIC values of > 0.5 (RM162, RM38, RM30, and RM80) which show that the markers are informative for the study of rice genetic diversity with Zinc content variety with an average gene diversity value of 0.53. The results of the phylogenetic analysis showed that the 30 genotypes clustered into five clusters with a similar coefficient of 0.68.

Identification the Causes of Diseases Caused by Fungi and the Intensity of Their Attacks on Shallots (Allium ascalonicum L.) in Bungaraya Village, Bungaraya Sub-district, Siak district Irfandri; Ali, Muhammad; Khavifah, Alviatul
Jurnal Online Pertanian Tropik Vol. 9 No. 1 (2022): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

The demand of shallots that increase are not balanced with their productions especially in Riau. One of the main cause of low productivity is the attack of nuisance plant organism. The research aims to analyze the diseases that are caused by fungi and the intensity of their attacks on Shallots in Bungaraya Village, Bungaraya Sub District, Siak Regency. The research is done by using an exploration method; observing the diseases attacks intensity in field and observation; isolation and purification of shallotsâ€™ fungi, identification of fungiâ€™ isolate on shallots. The intensity observation of diseases attack in field is done by diagonal method by determining the 5 points of samples randomly, then observing the kind of diseases that are found base on the symptoms and their intensity of attacks. The Identification of disease cause Fungi isolate observed the characteristic of macroscopic and microscopic mushroom. The result shows that the early diagnosis of diseases in the field on shallots in Bungaraya Village, Bungaraya Sub District, Siak Regency is withered fusarium diseases that is caused by A. porri fungi. The attack intensity of withered fusarium diseases is 80,51% and the attack intensity of purple spot diseases is 2,85%

Page 31 of 38 | Total Record : 378

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Benny Hidayat

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Home Page

OAI Link

Editorial Team

Contact

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

Abstract

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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