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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 335 Documents

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ANALISA PERTUMBUHAN VEGETATIF KEDELAI HIBRIDISASI GENOTIPA TAHAN SALIN DENGAN VARIETAS ANJASMORO UNTUK MENDUKUNG PERLUASAN AREAL TANAM DI LAHAN SALIN Rosmayati
Jurnal Pertanian Tropik Vol. 2 No. 2 (2015): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Peningkatan produksi kedelai perlu terus diupayakan, salahsatunya dengan memanfaatkan lahan marginal seperti tanah salin. Pemuliaan tanaman sangat diperlukan untuk menghasilkan varietas unggul, salah satunya dengan hibridisasi dan seleksi. Penelitian ini bertujuan untuk mengetahui respon pertumbuhan vegetatif hasil hibridisasi genotipa kedelai tahan salinitas dengan varietas anjasmoro untuk mendukung perluasan areal tanam di lahan salin. Penelitian ini dilaksanakan di Lahan percobaan Fakultas Pertanian dengan menggunakan media tanam tanah salin dengantingkatsalinitas 5-6 mmhos/cm yang dilakukan pada bulan September 2014 sampai dengan Mei 2015. Hasil penelitian menunjukkan terjadi penurunan pertumbuhan vegetatif mulai F1 sampai F2. Penurunan pada F2 sangat berbeda nyata dengan tinggi tanaman, jumlah cabang masing-masing sekitar 33% dan 46%, sedangkan umur berbunga pada 31 hari, lebih cepat 4 hari dibandingkan dengan kondisi optimum. Penurunan kandungan klorofil a, b dan total sebesar masing-masing 26%, 12% dan 7,1%. Namun hanya kandungan klorofil a yang penurunannya berbeda nyata dengan kondisi optimum. Dengan nilai heritabilitas tinggi tanaman, jumlah cabang dan umur berbunga masing-masing 0,2; 0,9; 0,3; menunjukkan adanya potensi genetik tanaman untuk dikembangkan di lahan salin untuk mendukung perluasan areal tanam kedelai di lahan salin.

PHYSIOLOGY EFFICIECY OF NITROGEN ABSORBTION WITH THREE SOYBEAN VARIETY OF UREA AND APPLICATIONS RHIZOBIUM IN SOIL WITH NUTRITRIONAL STATUS LOW NITROGEN Makruf Wicaksono
Jurnal Pertanian Tropik Vol. 2 No. 2 (2015): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jpt.v2i2.2896

The use of chemical nitrogen fertilizer tends to be high on soils with low nitrogen nutrient status, it can affect the balance of the global N cycle, contamination of groundwater and the increasing N2O (nitric monoxide is one of the greenhouse gases). The objective of this research to compare the effect of nitrogen fertilization and application of Rhizobium on nitrogen uptake efficiency, growth and yield of three varieties of soybeans In Soil With Nutritional Status Low Nitrogen. The research was conducted at the practice field Agricultural Extention Collage Medan, Deli Serdang North Sumatra Province in August-December, 2014. The method used is split-slip plot design with the main plot Rhizobium application and without Rhizobium, the subplot is the varieties used are Burangrang, Tanggamus, and Wilis. The sub-sub plot is the standard of N fertilization, which is control, urea 50 kg/ha, 100 kg/ha and 150 kg/ha. Variable observations include nitrogen absorption, plant dry weight, nodule, and production. The results showed that the application of Rhizobium on the variety of Wilis provides a significant response to the increased absorption of nitrogen, whereas the varieties Burangrang and Tanggamus not give a significant response to increased nitrogen absorption. A urea fertilizer dose of 150 kg/ha on the use of Rhizobium inoculant tends to give a negative reaction to the Physiology Efficiency Of Nitrogen Absorbtion (PEN), nodule, and weight of 100 grains. Physiology Efficiency Of Nitrogen Absorbtion (PEN) of three varieties tested were not affected by the level of nitrogen fertilization and the addition of Rhizobium

KARAKTERISTIK TANAH DAN PERBANDINGAN PRODUKSI KELAPA SAWIT (Elaeis guineensis Jacq.) DENGAN METODE TANAM LUBANG BESAR DAN PARIT DRAINASE 2:1 PADA LAHAN SPODOSOL DI KABUPATEN BARITO TIMUR PROPINSI KALIMANTAN TENGAH - INDONESIA Surianto
Jurnal Pertanian Tropik Vol. 2 No. 2 (2015): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Spodosol soil of Typic Placorthod sub-group of East Barito District is one of the problem soils with the presence of hardpan layer, low fertility, low water holding capacity, acid reaction and it is not suitable for oil palm cultivation without any properly specific management of land preparation and implemented best agronomic practices. A study was carried out to evaluate the soil characteristic of a big hole (A profile) and no big hole (B profile) system and comparative oil palm productivity among two planting systems. This study was conducted in Spodosol soil at oil palm plantation (coordinate X = 0281843 and Y = 9764116), East Barito District, Central Kalimantan Province on February 2014, by surveying of placic and ortstein depth and observing soil texture and chemical properties of 2 (two) oil palm's soil profiles that have been planted in five years. Big hole system of commercial oil palm field planting on the Spodosol soil area was designed for the specific purpose of minimizing the potential of a negative effect of shallow effective planting depth for oil palms growing due to the hardpan layer (placic and ortstein) presence as deep as 0.25 - 0.50 m. The big hole system is a planting hole type which was vertical-sided with 2.00 m x 1.50 m on top and bottom side and 3.00 m depth meanwhile the 2:1 drain was vertical-sided also with 1.50 m depth and 300 m length. Oil palm production was recorded from the year 2012 up to 2014. Results indicated that the fractions both big hole profile (A profile) and no big hole profile (B profile) were dominated by sands ranged from 60% to 92% and the highest sands content of non-big hole soil profile were found in A and E horizons (92%). Better distribution of sand and clay fractions content in between layers of big hole soil profiles of A profile sample is more uniform compared to the B profile sample. The mechanical holing and material mixing of soil materials of A soil profile among the upper and lower horizons i.e. A, E, B and C horizons before planting that resulted a better distribution of both soil texture (sands and clay) and chemical properties such as acidity value (pH), C-organic, N, C/N ratio, CEC, P-available and Exchangeable Bases. Investigation showed that exchangeable cations (Ca, Mg, K), were very low in soil layers (A profile) and horizons (B profile) investigated. The low exchangeable cations due to highly leached of bases to the lower layers and horizons. Besides, the palm which was planted on the big hole system showed good adaptation and response positively by growing well of tertiary and quaternary roots that the roots were penetrable into deeper rooting zone as much as >1.00 m depth. The roots can grow well and penetrate much deeper in A profile compared to the undisturbed hardpan layer (B profile). The FFB (fresh fruit bunches) production of the non-big hole block was higher than the big hole block for the first three years of production. This might be due to the high variation of monthly rainfall in-between years of observation from 2009 to 2014. Therefore, the hardness of placic and ortstein as unpenetrable agents by roots and water to prevent water loss and retain the water in the rhizosphere especially in the drier weather. In the high rainfall condition, the 2:1 drain to prevent water saturation in the oil palm rhizosphere by moving some water into the drain. Meanwhile, the disturbed soil horizon (big hole area) was drier than un disturbance immediately due to water removal to deeper layers. We concluded that both big hole and 2:1 drain are a suitable technology for Spodosol soil land especially in preparing palms planting to minimize the negative effect of the hardpan layer for oil palm growth.

EVALUASI KEMAMPUAN LAHAN MARGINAL DESA SIHIONG BONATUA LUNASI TOBASA UNTUK TANAMAN ANGGUR (Vitis vinifera L.) DAN JAMBU BIJI (Psidium guajava L.) Bintang; Supriadi; Mariani sembiring
Jurnal Pertanian Tropik Vol. 2 No. 2 (2015): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Penelitian bertujuan untuk mengetahui kemampuan lahan marjinal di Desa Sihiong Kecamatan Bonatua Lunasi Kabupaten Tobasa mendukung tanaman anggur (Vitis vinifera L.) dan jambu biji (Psidium guajava L.), dimulai tahun 2012-2014 menggunakan metoda survey, dengan dua tahapan yakni mengklasifikasikan kemampuan lahan di Sihiong dan mengevaluasi kesesuaian lahan terhadap tanaman anggur dan jambu biji. Data primer dari lapangan adalah kemiringan lereng, erosi, solum, drainase, singkapan batuan dan bahaya banjir/genangan. Analisis properti tanah (tekstur, permeabiltas, bulk density, salinitas, bahan organik, pH, Kapasitas Tukar Kation, Kejenuhan Basa) dilakukan di laboratorium Riset dan Teknologi Fakultas Pertanian USU Medan. Hasil penelitian menunjukkan bahwa lahan daerah Sihiong termasuk kelas III dengan kemampuan lahan aktual kelas III(es). Upaya perbaikan dapat dilakukan untuk mengatasi erosi dengan membuat teras di lahan sedangkan tekstur tanah Lempung Berpasir (t4) tidak dapat dirubah. Dengan adanya perbaikan maka kemampuan lahan potensial Sihiong menjadi kelas III(s). Kemampuan lahan di Desa Sihiong dapat mendukung tanaman Tanaman Anggur (Vitis vinifera L.) pada kesesuaian lahan aktual terendah S3 (eh) dan upaya perbaikan akan meningkatkan kelas potensial menjadi S2 (tc,wa) dengan faktor pembatas tc,wa (temperatur dan ketersediaan air/lama masa kering) tidakdapat/sulit diperbaiki. Kesesuaian untuk tanaman jambu biji (Psidium guajava L.) berada pada kelas S3 (nr,eh) dengan faktor pembatas retensi hara dan bahaya erosi. Alternatif perbaikan dengan pemberian bahan organik yang diperkaya mineral basa dapat meningkatkan kelas kesesuaian lahan potensial menjadi S2 (tc) dengan faktor pembatas tc (temperatur) yang sulit diperbaiki.

FISH-RICE FARMING AREA AT MANIK RAMBUNG RICE FIELD SUPPORTED FOOD SECURITY IN NORTHERN SUMATRA```` Ameilia Zuliyanti Siregar
Jurnal Pertanian Tropik Vol. 2 No. 2 (2015): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Rice and fish have been an essential part of the life of Indonesian people which produce from rice field. The research was conducted during two years (Dec.2008 to Sept.2010) using a purposive random sampling using three plots in lowland and terrace from Manik Rambung Rice Field (MRRF). Two types of rice crops (Ciherang and IR 64) are cultivated showed 6 orders, 21 families, 34 taxa and 25 species. Oligochaeta, Ephemeroptera, Hemiptera, and Diptera were identified respective families, while families of Odonata and Coleoptera were further identified to species. There are three categories of Dominance Index (DI) in a rice field, these are D=Dominant ( 5% individual); A=Accessory (2.5%  D  5% individual) and O=Occasional (2.5% individual) with four families (Baetidae, Chironomidae, Tubificidae and Ceratopogonidae) as ranked high on the DI list. The Kruskal-Wallis test showed significant differences between the abundance of aquatic organisms during the time of sampling (χ2=1274.840, P=0.000), rice-growing seasons (χ2=16.393, P=0.001) and rice cultivation phases (χ2=8.618, df=4, P=0.004). The study about fish farming produce plant and animal proteins and sustainable for food security in Northern Sumatra.

Phytoremediation of Contaminated Land at Medan Industrial Area by Ornamental Plants Lamria Sidauruk
Jurnal Pertanian Tropik Vol. 2 No. 2 (2015): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Pengembangan kawasan industri di Kota Medan, Sumatera Utara berdampak kepada meningkatnya pencemaran tanah oleh logam berat di kawasan tersebut. Fitoremediasi adalah sebuah teknologi yang inovatif, efektif dari aspek biaya, aman dan secara estetika dapat diterapkan untuk jangka panjang. Aspek penting yang perlu dicatat adalah tanaman tidak boleh digunakan untuk tanaman konsumsi. Tujuan dari penelitian ini adalah untuk mengembangkan teknologi fitoremediasi dengan menguji beberapa tanaman hias yang berbeda yang ditanam pada tanah dengan tingkat kontaminasi yang berbeda. Penelitian ini menguji delapan jenis tanaman hias yaitu: Sanseviera trifasciata, Dracaena fragrans, Diffenbachia sp, Phylodendron hederaceam, Agave sp.Codiatum variegatum, Anthurium crystallium dan Chrysalidocarpus lutescens . Parameter yang diamati adalah produksi biomassa dan penyerapan logam berat oleh tanaman. Hasil penelitian menunjukkan bahwa peningkatan produksi biomassa terbesar terdapat pada tanaman Diffenbachia sp. diikuti oleh Codiatum variegatum, Chrysalidocarpus lutescens, Sanseviera trifasciata dan Dracaena fragrans . Serapan logam berat paling tinggi terdapat pada tanaman Codiatum

THE EFFECTIVITY OF SEDIMENT TRAP IN THE CENTER LAND SALAK PADANGSIDIMPUAN AT SOUTH TAPANULI Yusriani Nasution
Jurnal Pertanian Tropik Vol. 2 No. 2 (2015): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

West Angkola sub-districts and South Angkola are salak areas center of South Tapanuli that partly has undulating to hilly topographic with steep slopes that are potentially eroded. This study aims to determine the sediment trap and river on the land in the district Angkola West and East as well as the correlation between sediment discharge to the river flow and rainfall. The method used was survey methods and data analysis to quantify the Water Catchment Area for each Watershed by using software tools Arc Geographic Information System ( GIS ) 10.1. Sediment discharge calculated using the evaporation method. Regression data analysis using the software SPSS 19. Results showed the highest sediment discharge analysis on analysis in March in the District of East Angkola is 5.56 tons/day, while in April amounted to 9.2 tons/ha. Results of the analysis of sediment discharge peak in March in the District of West Angkola amounted to 0.74 tons /ha, while in April the sediment discharge is 1.1 ton/ha.

KONTRIBUSI PEMANFAATAN PUPUK HAYATI DAN PUPUK KOMPOS TERHADAP PERTUMBUHAN DAN SERAPAN FOSFOR PADA TANAMAN JAGUNG Ernitha Panjaitan
Jurnal Pertanian Tropik Vol. 2 No. 2 (2015): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Jagung (Zea mays L.) merupakan salah satu tanaman pangan dunia yang terpenting, selain gandum dan padi. Lahan yang berpotensi sebagai lahan untuk produksi jagung diantaranya adalah lahan kering marginal. Lahan kering marginal adalah lahan yang tingkat kesuburannya rendah. Salah satu usaha yang dapat dilaksanakan untuk meningkatkan kesuburan tanah adalah melalui bioteknologi biofertiliser yaitu inokulasi mikoriza dan pemberian pupuk kompos. Penelitian dilakukan di lahan Fakultas Pertanian Universitas Metodist Indonesia. Percobaan menggunakan Rancangan Acak Kelompok (RAK) yang terdiri atas sembilan kombinasi perlakuan inokulasi mikoriza dan pupuk kompos dengan tiga ulangan. Perlakuan tersebut terdiri atas: M0 (tanpa inokulan mikoriza); M1 (inokulan 5 g tanaman-1); M2 (inokulan 10 g tanaman-1) dan O0 (tanpa pupuk kompos); O1 (50 g pupuk kompos tanaman-1); O2 (100 g pupuk kompos tanaman-1). Hasil penelitian menunjukkan bahwa inokulasi mikoriza sebesar 10 g tanaman-1 dan pupuk kompos sebesar 100 g tanaman-1 memberikan kontribusi yang nyata terhadap pertumbuhan tanaman jagung meliputi tinggi tanaman dan diameter batang, sedangkan inokulasi mikoriza sebesar 10 g tanaman-1 dan dosis pupuk kompos sebesar 50 g tanaman-1 dapat meningkatkan serapan P oleh tanaman jagung. Dengan demikian dapat disimpulkan bahwa kontribusi pemberian mikoriza dan pupuk kompos dapat meningkatkan kesuburan tanah lahan kering marginal ditandai dengan memacu pertumbuhan tanaman jagung dengan cara meningkatkan P-tersedia dan mengefektifkan penyerapan P sehingga penggunaan pupuk P dapat lebih efisien.

OPTIMALISASI PRODUKSI JAGUNG MANIS DENGAN PEMBERIAN PUPUK BERIMBANG ORGANIK DAN ANORGANIK Yenni Asbur; Yayuk Purwaningrum
Jurnal Pertanian Tropik Vol. 2 No. 3 (2015): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Produktivitas jagung manis saat ini belum mencapai hasil optimal, sehingga dibperlukan upaya untuk meningkatkannya, salah satunya melalui pemupukan berimbang organik dan anorganik. Penelitian ini bertujuan untuk mengetahui pemupukan berimbang organik dan anorganik yang tepat untuk meningkatkan pertumbuhan dan produksi jagung manis. Penelitian dilaksanakan di kebun percobaan Balai Benih Induk Kabupaten Deli Serdang, Sumatera Utara menggunakan Rancangan Acak Kelompok (RAK) satu Faktor dengan tiga ulangan. Pemupukan berimbang organik dan anorganik yang diberikan terdiri dari 9 taraf, yaitu :100 kg/ha NPK + 5 t/ha pupuk kandang sapi diberikan pada saat tanam, 100 kg/ha NPK + 10 t/ha pupuk kandang sapi diberikan pada satu minggu sebelum tanam, 100 kg/ha NPK + 15 t/ha pupuk kandang sapi diberikan pada pada dua minggu sebelum tanam, 200 kg/ha NPK + 5 t/ha pupuk kandang sapi diberikan pada saat tanam, 200 kg/ha NPK + 10 t/ha pupuk kandang sapi diberikan satu minggu sebelum tanam, 200 kg/ha NPK + 15 t/ha pupuk kandang sapi diberikan pada dua minggu sebelum tanam, 300 kg/ha NPK + 5 t/ha pupuk kandang sapi diberikan pada saat tanam, 300 kg/ha NPK + 10 t/ha pupuk kandang sapi diberikan satu minggu sebelum tanam, dan 300 kg NPK + 15 t/ha pupuk kandang sapi diberikan pada dua minggu sebelum tanam. Hasil penelitian menunjukkan bahwa pemberian pupuk berimbang organik dan anorganik dengan dosis 200 kg/ha NPK + 10 t/ha pupuk kandang sapi yang diberikan satu minggu sebelum tanaman mampu menghasilkan berat tongkol dan panjang tongkol tertinggi dibandingkan perlakuan lainnya. Berdasarkan pemetaan dua dimensi, produksi jagung manis yang meliputi berat tongkol, diameter tongkol dan panjang tongkol dipengaruhi oleh jumlah daun dibandingkan tinggi tanaman.

REHABILITATION AGRICULTURE AREA COVERED BY SINABUNG VOLCANIC ASH Agustoni Tarigan
Jurnal Pertanian Tropik Vol. 2 No. 3 (2015): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

The eruption of Mount Sinabung consistently and material issued increasingly large volume has caused plant and agricultural land damaged. Agricultural land damage was caused by the material issued mountain area is 10.945,24 ha. The role of technology and the results of research that has been done to agricultural lands caused the eruption of Mount Sinabung to be recommendations for the improvement of agricultural land. Efforts to improve the aspects of physical and chemical land are conservation, rehabilitation land of sand and the increase in the quality of the land. The thickness of volcanic ash after an eruption of covering agricultural land can be divided into 4 classes, namely: thin (the thickness < 2 cm), medium (thickness 2- 5 cm and thick (> 5 cm). Efforts for the recovery and rehabilitation land on each cluster based on the thickness of the dungeon ashes were normal processing with a hoe or plow, fertilizing with of organic matter and to the lava, dungeon needs to be done the conservation and land rehabilitation by an annual plant / the forest. The rehabilitation of agricultural land that badly damaged by eruption material may not be restored in a short time because of soil conditions which are acid, rocky and sandy. Thus the programs carried out by gradually and different treatment in accordance with their condition agricultural land.

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

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Home Page

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Contact Name Benny Hidayat

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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