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PERTANIAN TROPIK

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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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Pengaruh Jenis Larutan Osmotik pada Invigorasi Benih Kakao (Theobroma cacao L.) dengan Beberapa Lama Pengeringan Sri Lestari Hutabarat; Haryati; Irsal Irsal
Jurnal Pertanian Tropik Vol. 5 No. 1 (2018): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

This study aims to determine the effect of osmotic solution on cocoa (Theobroma cacao L.) seed invigoration with several long drying. This research was conducted at the Laboratory of Seed Technology, Faculty of Agriculture, University of Sumatera Utara, from August to September 2016, using a randomized block design with 2 treatment factors. The first factor is a type of solution ie without immersion; equates; coconut water 50%; coconut water 100%; Polyethylene Glycol (PEG) 6000 5%; PEG 6000 10% and the second factor is long drying with 4 levels ie 1 day; 2 days ; 3 days; 4 days. The results showed that the best treatment of osmotic solution was found in the treatment of coconut water with 50% concentration which resulted in a germination rate of 5.51 days and a vigor index of 3.79. The best long of drying treatment was 1 day drying with average germination potential 99.17%, germination rate 4.46 days, normal germination 93.06%, abnormal germination, 12.21%, 5.35% dead seed and vigor index 5,34. The best treatment interaction on the combination of treatment

Tanggap Pertumbuhan Bibit Tebu Merah (Saccharum officinarum L.) Asal Bud Set terhadap Pemangkasan dan Frekuensi Penyiraman Supriadi Hartanto; Irsal; Asil Barus
Jurnal Pertanian Tropik Vol. 5 No. 1 (2018): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

This research was conducted to determine the growth of red sugarcane seedling on pruning and frequency of watering. This research was conducted in the research field of Faculty of Agriculture University of Sumatera Utara (± 25 m asl) from June-October 2017 using Factorial Randomized Block Design with three replications. The first factor was pruning (control, 1, and 2 months/plant) as well as the second factor was the frequency of watering (1, 3, 5, and 7 days/plants). The variable observed were plant height, a number of leaves, stem diameter, a number of the tiller, shoot wet weight, root wet weight, and shoot-root ratio. The results showed that the frequency of watering treatment had a significant effect on the number of a leaf (4,6,8,10 and 12 weeks after plant), stem diameter (4,6,8,10 and 12 weeks after plant), shoot wet weight, and root wet weight. Pruning treatment had no significant effect on all variables observed. The interaction of both has no significant effect on all variables observed.

Pengaruh Curah Hujan dan Hari Hujan Terhadap Produktivitas Karet (Hevea brasiliensis Muell-Arg.) Berumur 10, 15 dan 20 Tahun di Kebun Aek Pamienke PT. Socfin Indonesia (SOCFINDO) Wanda Andika Hasibuan; Irsal Irsal; Mariati
Jurnal Pertanian Tropik Vol. 5 No. 1 (2018): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Water plays a major role in the process of rubber plant metabolism. An inappropriate amount of water has a negative impact on the achievement of rubber productivity. The aim of the research was to study the effect of rainfall and rainy day on the rubber productivity in 10, 15 and 20 years old. The research was conducted at Aek Pamienke Plantation PT. Socfin Indonesia (Socfindo), sub-district of Aek Natas, district of Labuhan Batu Utara, Province of North Sumatera from July to August 2017. This study used secondary data available in plantation administration, consisted of rubber productivity data in 2014, 2015 and 2016, whereas rainfall and rainy day monthly data in 2013, 2014 and 2015. The analytical method used is multiple linear regression analysis and correlation analysis. The feasibility regression model was tested with the classic assumption test consists of a normality test, heteroscedasticity test, multicollinearity test, and autocorrelations test by using SPSS v.22 statistical tool for windows. Classical assumption test results showed that the regression equation in rubber plants in 10, 15 and 20 years old have been qualified. The regression analysis showed that rainfall and rainy day variables partially and simultaneously influence unreal with alpha 5% (Sig > á 0,05) to increased rubber productivity in 10, 15 and 20 years old. The result of correlation analysis shows rainfall and rainy day variables have a strong relationship to the rubber productivity, with correlation values of rainfall and rainy days at 0,846.

Tanggap Pertumbuhan Bibit Kopi Robusta (Coffea Robusta L.) Terhadap Berbagai Media Tanam Dan Frekuensi Penyiraman Lia Karlina Br Sembiring; Rosita Sipayung; Irsal
Jurnal Pertanian Tropik Vol. 5 No. 1 (2018): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Massive breeding is often the case with the availability of the amount of water that can be stored on the media. The aim of this research is to know the influence of media and the frequency of watering on the growth of robusta coffee seedlings and to find the best media and optimum watering frequency. This experiment was conducted at the Faculty of Agriculture, University of Sumatera Utara, Medan from June to September 2017. The experimental method used was Factorial Randomized Block Design with 2 treatment factors, ie 1: planting medium ie, topsoil ; topsoil: sand (2: 1); topsoil: rice husk (2: 1), topsoil: charcoal husk (2: 1) and factor 2: watering frequency ie, watered once a day; watered every 4 days; watered 7 days and watered once every 10 days. The variable was plant height, stem diameter, total leaf number, total leaf area, fresh crown weight, canopy dry weight, fresh root weight, root dry weight, longest root, and canopy and root ratio. The results showed that planting media treatment had a significant effect on plant height variables, stem diameter increase, leaf number, total leaf area, fresh crown weight, canopy dry weight, fresh root weight, root dry weight, and root canopy ratio. The best treatment of planting medium was found in topsoil treatment: rice husk (2: 1). The treatment of watering frequency had a significant effect on the stem diameter 2 - 12 of the week after planting move observation variable, total leaf area, fresh crown weight, dry crown weight, fresh root weight, and dry weight of roots. The best treatment frequency of watering hose is watering every 4 days. The interaction between the two treatments had a significant effect on the diameter of the stem diameter variable, the total leaf area and the fresh weight of the canopy.

The Effect of Hydroton Planting Media with Various Organic Material Compositions on the Growth and Productivity of Pakcoy Plants (Brassica Rapa L) Tiara Putri Dwi Dayani; Edy Suryadi; Sophia Dwiratna
Jurnal Pertanian Tropik Vol. 6 No. 2 (2019): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jpt.v6i2.3151

The hydroton planting media that is marketed has the characteristics of low water holding capacity. The addition of organic material in the form of husk charcoal, cocopeat, and compost clay can increase the water holding capacity of the hydroton so that plant productivity increases. This study aims to determine the composition of the best planting media for pakcoy plant growth in hydroponic floating raft systems. The research was carried out at the Rooftop of the Food Building of the Faculty of Agricultural Industrial Technology, Padjadjaran University. The experiment was arranged using a completely randomized design that was repeated four times and seven combinations of treatments. The composition of organic matter is added as much as 2.5% and 5% of each organic material. The variables observed were plant height, the number of leaves, root length, leaf area, wet weight, and stover weight. All data were analyzed using ANOVA followed by DMRT test at the level of 5%. The results showed that the organic matter in hydroton had a role in the parameters of growth and productivity of pakcoy plants compared to hydroton materials without comparing organic matter and the weight of root wet. The treatment of adding organic matter in the form of (husk charcoal, 5%) and (Cocopeat, 5%) is a treatment that affects the root length and weight of root wet.

Screening Gogo Rice Local Aceh Cultivars Drought Tolerant Under Polyetilene Glycol 6000 Muhammad Syahril; Syamsul Bahri; Rhido Suhada
Jurnal Pertanian Tropik Vol. 6 No. 2 (2019): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Efforts for increasing rice production nationally, it is necessary to increase the productivity of a land. Utilization of marginal lands like drought land potential to increase rice production nationally. One effort to utilize marginal land like dry land is the use of high-yielding drought tolerant varieties. Until now high-yielding drought tolerant varieties still relatively rare. For this reason, it is necessary to create high-yielding drought tolerant varieties from plant breeding program. One of the standard programs in plant breeding to create high-yielding drought tolerant varieties is provision of genetic material as parental. Local varieties gogo rice Drought-tolerant potential to be used as parental in the plant breeding program to create of high-yielding drought tolerant rice varieties. For this reason, it is necessary to test drought tolerance of local rice cultivars. The study used 10 cultivars exploration results in East Aceh Regency namely Gameso, Sibengkok, Ramos Gunung, Sidol, Sigedul, Rias Kuning, Rias putih, Sibontok, Serumu, and Sileso. Drought tolerance testing using PEG solution (Polyethylene Glycol) 6000 156. 75 g / liter of H2O which is equivalent to the osmotic potential of -3 BAR and aquades as control (0 BAR) an germination stage and early vegetative stage. The results of the study show that 10 cultivars tested in the germination stage, 6 cultivars were selected as drought tolerant cultivars. Furthermore, 6 cultivars tested in the early vegetative stage showed the ability to recover at day 35 and then at day 42 showed no symptoms of drought. 6 drought tolerant cultivars are Gameso, Ramos Gunung, Sigedul, Rias Kuning, Sibontok, and Sileso.

Insecticide Activity Extract of Tinospra crispa Mixed With Cow Urine on Spodoptera litura in the Laboratory Putri Mustika Sari; Henny Wahyunita; Adriansyah Yoesoep; Lisdayani; Fitra S. Harahap
Jurnal Pertanian Tropik Vol. 6 No. 2 (2019): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Armyworms (Spodoptera litura) become important pests in Indoensia that eat leaves compared to other pests because they are polyfag. S. litura can reduce productivity even crop failure. Therefore, it is necessary to do research on how to control S. litura effectively and environmentally friendly. This study aims to determine the effectiveness of brotowali extract (Tinospra crispa) as a botanical insecticide and obtain the right concentration of fruit extract, young leaves, and old Brotowali leaves to control the armyworm (litura Spodopter). This study used a Non Factorial Completely Randomized Design (RAL) with 6 treatments of various doses of brotowali extract mixed with cow urine and 4 replications. The results of the study showed that the administration of Brotowali + Urine Cattle extract with high doses (30 ml / jar) was able to increase the speed of death of the armyworm.

Analisis Vegetasi Gulma di lahan Tanaman Jagung (Zea mays L.) Fitria; Efrida; Fitra Syawal Harahap
Jurnal Pertanian Tropik Vol. 6 No. 2 (2019): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Penelitian Analisis vegetasi gulma di tiga kabupaten di sumatera utara yang telah dilaksanakan pada bulan Maret 2019 dengan meggunakan Alat square ukuran 50 x 50 cm dari hasil penelitian dengan menghitung nilai SDR (Summed Dominance Ratio) menunjukkan bahwa tanaman jagung Kabupaten Simalungun Menunjukkan nilai SDR yang dominan gulma Ageratum conyzoides (61.17%), Deli Serdang gulma Cyperus esculentus (30,15%) dan Karo jenis gulma Imperata cylindrica (27,66%). Hasil Penelitian menunjukkan bahwa ada perbedaan jenis gulma pada tanaman jagung untuk kabupaten Simalungun dan deli serdang menunjukkan jenis gulma yang sama berdaun lebar (Broad leaves) sedangkan kabupaten karo menunjukkan gulma alang-alang (Grasses).

Growth and production response of plant pakcoy (brassica rapa l) on use of nasa light organic fertilizer Lisdayani; Fitra Syawal Harahap; Putri Mustika Sari
Jurnal Pertanian Tropik Vol. 6 No. 2 (2019): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Pakcoy (Brassica rapa L.) or commonly called mustard spoon includes vegetable plants that are heat resistant, so that they can be planted in the lowlands to highlands The production of packcoy plants experiencing ups and downs in 2010 is the peak production of 141.25 quality / ha and continues to decline to 2014 became 114.35 quality / ha. Efforts to increase packcoy production can be done by using organic fertilizers from agricultural waste, manure, green manure, human waste, and compost instead of nutrient sources. This study aims to determine the response of growth and production of Pakcoy plants to the provision of NASA POC organic fertilizer. This study uses factorial randomized block design consisting of 2 treatment factors, namely: Chicken Cage Organic Fertilizer (A) which consists of 3 levels, namely: A0 = 0 tons / ha, A1 = 15 tons / ha (158 g / polybag), A2 = 30 tons / ha (316 g / polybag). NASA POC concentration (N) consists of 4 levels, namely: N0 = 0% (control), N1 = 1 cc / liter of water, N2 = 2 cc / liter of water, N3 = 3 cc / liter of water. The results showed that NASA's POC showed a significant effect on pakcoy plant height, the use of liquid organic fertilizer dosage (2cc / ltr) had a significant effect on plant height. The highest pakcoy plant height is found in the treatment of N2 (2 cc / ltr) of 25.50 cm. The net weight per plot was obtained at the N2 treatment of 262.92 grams

Analysis of The State of Educative Workers in Polytechnic of Agricultural (STPP) Lecturers Based on Empirical Data in Sumatera Utara Nurliana Harahap; Ameilia Zuliyanti Siregar; Yuliana Kansrini
Jurnal Pertanian Tropik Vol. 6 No. 2 (2019): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

The objectives of the study are determined to analyze the competencies, motivation and implementation of lecturers in improving performance. This research was conducted in 4 STPPs from 6 service education colleges under the Ministry of Agriculture namely Medan STPP, Bogor STPP, STPP Magelang and STPP Malang. The research area was chosen purposively with the consideration that the six locations were universities belonging to the Ministry of Agriculture which had received performance allowances since 2012. The researchers wanted to determine how the level of performance capabilities of government officials (PNS) especially lecturers in producing quality graduates. Lecturer competencies have a significant influence on the performance of lecturers. This indicates that the higher the competence possessed by the lecturer, the higher the performance of the lecturer. Lecturer competency consists of four types of competencies, namely pedagogic competence, social competence, professional competence and personality competencies. Based on purposively methods, the results of research in 4 (four) STPP, social competency is the ability to communicate and interact effectively and efficiently with students, fellow teachers, parents / guardians of students, and the wider community having the highest influence of 34.6%, then competency professional, ability in mastering subject matter widely and deeply, that is equal to 23.2%. Providing performance allowances which is one form of the reward and punishment system and provides a significant influence on the performance of the Lecturer.Motivation has no significant effect on the performance of the Lecturer in Agricultural Extension College (STPP).

Page 19 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

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