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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 377 Documents

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REMEDIASI TANAH TERCEMAR LOGAM BERAT DENGAN MENGGUNAKAN BIOCHAR Benny Hidayat
Jurnal Pertanian Tropik Vol. 2 No. 1 (2015): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Pembangunan industri dan urbanisasi selain dapat meningkatkan kesejahteraan manusia, tetapi juga memberikan efek negatif kepada lingkungan yaitu menghasilkan limbah dalam jumlah yang sangat besar, dan hal ini akan menjadi masalah yang serius bila tidak tangani dengan segera. Penangangan limbah pun masih belum di lakukan dengan serius dan bertanggung jawab sehingga sering dilaporkan adanya lahan yang tercemar akan limbah khususnya limbah logam berat. Logam- logam berat merupakan unsur yang tidak biodegradable sehingga limbah- limbah yang mengandung logam berat bila tertumpah ke lingkungan sedikit demi sedikit akan terakumulasi pada tanah dan air, bila ketersediaanya meningkat akan di serap oleh tanaman dan akan memberikan efek negative kepada kehidupan manusia. Banyak usaha yang telah dilakukan dalam menangani pencemaran logam berat ini dan pemberian biochar merupakan solusi yang sangat menjanjikan, karena biochar memiliki potensi dengan luas permukaan yang besar, morfologi yang sangat porous serta gugus fungsionalnya yang berpotensi untuk mengurangi bioavailabilitas dan pelindian logam berat melalui adsorpsi dan reaksi fisikokimia lainnya dan juga dapat meningkatkan kesuburan tanah dengan perbaikan sifat sifat tanah. Biochar merupakan bahan basa yang dapat meningkatkan pH tanah dan berkontribusi terhadap stabilisasi logam berat. Aplikasi biochar untuk perbaikan dari tanah yang tercemar logam berat dapat memberikan solusi baru untuk masalah polusi tanah. Tulisan ini memberikan gambaran tentang pemanfaatan biochar dalam mengurangi mobilitas dan bioavailibiltas logam berat pada tanah tercemar

STUDY ON CHARACTERISTICS OF LAND AREA REFUGEE RELOCATION ERUPTION SINABUNG KARO DISTRICT AS A BASIS FOR LAND USE BASED WATERSHED MANAGEMENT Abdul Rauf; Rahmawaty; Hadi Wijoyo
Jurnal Pertanian Tropik Vol. 2 No. 1 (2015): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Study of the characteristics of the land in the area of refugee relocation eruption of MountSinabung intended as a basis for the use of land-based watershed management in the regionhas been carried out in November and December 2014. The study was conducted using asurvey at the site which is administered in the village of Nagara, Pertibi Lama and PertibiTembe Tiga Panah Sub District Karo District. Field observations carried out on the physicalcharacteristics of the land and soil sampling for laboratory testing of physical, chemical andbiological soil. The study also conducted bassed secondary data sourced from the analysis ofvarious thematic maps such geological maps, soil type maps, topographic maps and maps ofwatershed areas. The results showed that the area of Mount Sinabung relocation is in theupstream region of two important watersheds in North Sumatra and Aceh, which WampuWatershed and Singkil Watershed, the dominant topography sloping to undulating located ata height of more than 1,550 m above sea level. Land in refugee relocation sites Sinabungclassified into subgroups Andic Dystropept which has properties (smeary orthixotropic), the soil is very loose (BD <0.8 g / cm3) and high content of organic matter in theupper layers of the soil pH suitable for upland crops, and the number (population) microbesare also high.

ENHANCING SOIL WATER HOLDING CAPACITY AND CATION EXCHANGE CAPACITY OF SANDY SOIL WITH APPLICATION OF MANURE ON SIMALINGKAR SOIL Parlindungan Lumbanraja; Erwin Masrul Harahap
Jurnal Pertanian Tropik Vol. 2 No. 1 (2015): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

The research took place at the University of HKBP Nommensen, Faculty of Agriculture Research Greenhouse in Simalingkar, Medan, Indonesia. It hypothesized that the application of manure as a single factor could increase the soil water holding capacity and soil cation exchange capacity. Research designed with Complete Randomize Design, the treatment replicated by four times. Every parameter that affected significantly will be continued analyzed with Duncan’s Multiple Range Test. For observation had made by measures of soil water holding capacity and soil cation exchange capacity. The concluding of the research can be explained that the effects of manure application on sandy soil after 30 days of incubation at the rate of application equal with 20 t/ha have significantly increased soil water holding capacity only at 72 hours after saturation. The Effects of manure application on sandy soil after 15 as well as 30 days of incubation at all rates of application have not significantly affected cation exchange capacity.

PENGARUH PEMBERIAN MVA (MIKORIZA VESICULAR ARBUSKULAR) TERHADAP PERTUMBUHAN STUMP KARET KLON PB 260 (Hevea Brasiliensis Muell Arg.) DAN SERAPAN HARA PADA BERBAGAI KADAR AIR TANAH DI RUMAH KASA Asmarlaili Sahar Hanafiah
Jurnal Pertanian Tropik Vol. 2 No. 2 (2015): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Mikoriza arbuskular merupakan jamur akar yang dapat meningkatkan ketahanan bibit yang diinfeksinya lebih baik dibandingkan dengan yang tidak terinfeksi jika ditanam ke lapang. Penelitian ini bertujuan untuk mempelajari pengaruh pemberian MVA (Mikoriza VesicularArbuskular) terhadap pertumbuhan stump karet Klon PB 260 (Hevea brasiliensis MUELL Arg.) dan serapan hara pada berbagai kadar air tanah di rumah kasa. Penelitian dilakukan pada akhir Maret 2014 dan selesai pada pertengahan Agustus 2014. Isolat MVA yang digunakan adalah Acaulospora sp 1, Acaulospora sp 2 dari hasil penelitian HB 2013 dan Glomus sp yang berasal dari koleksi Laboratorium Biologi Tanah FPUSU. Penelitian ini dilakukan di rumah kasa FP USU, dengan menggunakan rancangan petak terpisah. Sebagai petak utama adalah kadar air (100, 80 dan 60% kapasitas lapang). Sebagai anak petak adalah perlakuan MVA sebanyak 100g inokulum/polibeg yang terdiri dari tanpa inokulasi dan diinokulasi dengan berbagai isolat MVA. Setiap kombinasi perlakuan diulang empat kali. Variabel yang diamati meliputi pertumbuhan tanaman (pertambahan diameter batang) yang diamati setiap minggu, bobot kering tanaman, serapan hara N dan P, derajat infeksi akar pada akhir percobaan. Hasil penelitian ini menunjukkan bahwa penurunan kadar air tanah menurunkan serapan unsur hara N dan P oleh tanaman. Pada kondisi kadar air tanah 80% kapasitas lapang diperoleh pertambahan diameter batang, serta serapan hara N, P tertinggi pada tanaman yang diinolulasi dengan Acaulospora Sp1. Pada kondisi kadar air tanah 60% kapasitas lapang, pertambahan diameter batang tertinggi diperoleh pada tanaman yang diinokulasi dengan Glomus sp.

PENINGKATAN PRODUKTIVITAS PADI LAHAN RAWA LEBAK MELALUI PENGGUNAAN VARIETAS UNGGUL PADI RAWA
Jurnal Pertanian Tropik Vol. 2 No. 2 (2015): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

In 2014 the total area of rice fields in North Sumatra was 464 827 ha, which has a land area of irrigated rice 291 062 ha, while the non-irrigated rice land area of 173 765 ha. Non irrigated wetland is classified into three agro-climatic types include 1). Rainfed areas, 2). Tidal wetland and 3). Lowland swamp wetland or non-tidal swamp. The potential development of swamp wetlands for paddy is still open because of the productivity is still low. Causes of low productivity such as soil fertility are relatively low, it still uses the old local varieties in 5-6 months, varieties that have been hereditary, and land management is still relatively conventional. Through the Integrated Crop Resource Management approach (PTT), swamp wetlands have the potential to be developed and are expected to become a contributor to rice production significantly. The aim of this research is to provide the technology package for lowland swamp rice cultivation in North Labuhan Batu Regency, North Sumatra Province. The research was conducted in the village of Sidua-Two, Sub District of South Kualuh, North Labuhan Batu district, from April to September 2014. Research using randomized block design (RBD) with 7 treatment swamp rice varieties that Inpara1, Inpara2, Inpara3, Inpara4, Inpara5, Margasari and varieties that farmers commonly planted the Mekong. Treatments were replicated three times, cooperator farmers used as replication with a plot area of 20m x 25m with a total area of 1ha. The results showed that the varieties Inpara1, Inpara2, and Inpara 3 provide the highest productivity compared to other varieties. Additionally varieties Mekongga still gave good productivity in lowland swamp. The main obstacle a lowland swamp land development is waterlogging, and unpredictable drought, depending on the circumstances of hydro topography, rainfall, and water level of local rivers. Results of soil analysis showed the content of micro-nutrients such as Al, Fe, Mn, Band Sare also included a higher category. The high content of elements Al and Fe cause soil reactions that are highly acidic soil and the soil pH is very low. Recommendations on a package of rice cultivation in shallow lowland swamp land need to be implemented in order to increase the productivity of lowland swampland.

UJI TOLERANSI BEBERAPA VARIETAS PADI ( Oryza sativa L. ) TERHADAP NAUNGAN
Jurnal Pertanian Tropik Vol. 2 No. 2 (2015): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Penelitian ini bertujuan untuk mengetahui uji toleransi beberapa varietas padi (Oriza sativa L) terhadap variasi intensitas penyinaran. Penelitian ini dilaksanakan bulan November 2014 sampai dengan bulan Februari 2015. diKebun Percobaan Pasar Miring, Balai Pengkajian Teknologi Pertanian (BPTP) Sumatera Utara. Jl. Raya-Galang Km 8,2 Lubuk Pakam, Kec. Pagar Merbau, Kab. Deli Serdang, Sumatera Utara. Rancangan yang digunakan dalam penelitian adalah Rancangan Petak Terbagi (RPT) dengan 2 faktor, yaitu: yang pertama faktor Naungan (N) sebagai petak utama dengan 3 taraf yaitu: N0 = tanpa naungan (100% intensitas penyinaran), N1= dinaungi 25% (75% intensitas penyinaran), N2 = dinaungi 50% (50% intensitas penyinaran). Yang kedua faktor varietas padi (V) sebagai anak petak dengan 5 taraf yaitu : V1= varietas Sidenuk, V2= varietas Ciherang, V3= varietas Inpari 10, V4= varietas Inpari 30 dan V5= varietas Mugibat. Jumlah kombinasi perlakuan 15 kombinasi yang diulang sebayak 3 kali menghasilkan 45 satuan percobaan, jumlah tanaman per plot 40 tanaman dengan 10 tanaman sampel, jumlah tanaman keseluruhan adalah 1800 tanaman dengan jumlah sampel seluruhnya 450 tanaman. Hasil penelitian menunjukkan bahwa perlakuan intensitas penyinaran (naungan) berpengaruh nyata terhadap parameter tinggi tanaman 14 MST, jumlah anakan, jumlah anakan produktif, jumlah gabah berisi per malai, berat gabah kering per plot dan berat gabah kering per Ha. Sedangkan parameter tinggi tanaman 2, 4 dan 6 MST, panjang malai, jumlah gabah per malai, jumlah gabah hampa per malai, berat gabah 1000 biji, kandungan klorofil A, kandungan klorofil B, kandungan klorofil Total tidak berpengaruh yang nyata. Pada perlakuan varietas berpengaruh nyata terhadap parameter tinggi tanaman, jumlah anakan, jumlah anakan produktif, jumlah gabah per malai, jumlah gabah berisi per malai, sedangkan terhadap panjang malai, jumlah gabah hampa per malai, berat gabah 1000 biji, kandungan klorofil A, kandungan klorofil B, kandungan klorofil Total, berat gabah kering per plot, berat gabah kering per Ha, penggunaan varietas tidak memberikan perbedaan yang nyata. Interaksi varietas dan intensitas penyinaran memberi pengaruh yang nyata terhadap jumlah anakan dan jumlah anakan produktif. Sedangkan parameter tinggi tanaman, jumlah gabah per malai, jumlah gabah berisi per malai, panjang malai, jumlah gabah hampa per malai, kandungan klorofil A, kandungan klorofil B, kandungan klorofil Total, berat gabah 1000 butir, berat gabah kering per plot dan berat gabah kering per Ha tidak memberikan perbedaan yang nyata.

ASSESSMENT OF COMMODITIES AREA GAMBIER (Uncaria gambir Roxb.) IN PAKPAK BHARAT SCALE 1 : 50.000 Lukas Sebayang
Jurnal Pertanian Tropik Vol. 2 No. 2 (2015): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Gambier (Uncaria gambier Roxb.) is a cultivated plant regeneration in Pakpak Bharat. Gambir extract benefits as well as the pharmaceutical industry and traditional is quite interested so that market opportunities gambier quite open for the domestic market and abroad. Land potential and development opportunities gambir high enough, it is in the use of plantation area of 1,224 ha and optimization of dry land area of 16 049, 6 hectares (Pakpak Bharat in Figures, 2013). Gambier development in Pakpak Bharat tends to increase, so it is necessary to study the suitability of land to see the direction of the development of the appropriate location. This assessment was conducted by using ALES (Automated Land Evaluation System). SDPLE (Standard Procedure for Land Evaluation) data was imported to ALES program. Land evaluation result was show in spatial form. This form made by imported tabulation data to GIS (Geographical Information System) form. Suitability land maps (scale 1 : 250.000) present based on each commodities by ArcView program.

PEMANFAATAN LAHAN SUB-OPTIMAL UNTUK PENGUSAHAAN TANAMAN KARET: SUATU RANGKUMAN HASIL SURVEI DAN PENELITIAN PA Nugroho
Jurnal Pertanian Tropik Vol. 2 No. 2 (2015): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

Some typologies of the sub-optimal area are known as the potential for rubber cultivation. Tidal and high elevation areas are the two potential for rubber cultivation. Rubber cultivation in these areas must be followed by the input of technology. In this paper, we summarize the results of the research and survey from the Indonesian Rubber Research Institute in order to support the utilization of the sub-optimal area for rubber cultivation. Water management, modification of planting material and modification in planting manner are needed for rubber cultivation in the tidal area while rubber development in an area with high elevation; the selection of appropriate rubber clones and soil conservation techniques are required.

GROWTH ANALYSIS OF SOYBEAN UNDER DRY LAND WITH APPLICATION OF Bradyrhizobium japonicum INDUCED BY GENISTEIN AND ORGANIC FERTILIZER
Jurnal Pertanian Tropik Vol. 2 No. 2 (2015): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

This study aimed to get the information of soybean growth response on inoculation of B. japonicum induced genistein under dry land. The experiment was conducted in farmer fields at Desa Sambirejo, Langkat on June-September 2012. The study used a factorial randomized block design with two factors and three replications. The first factor is genistein induction treatment consisting of without and genistein (50 μM). The second factor is the treatment of B. japonicum and organic fertilizer consisted of without B. japonicum; B. japonicum; B. japonicum + manure 10 t/ha; B. japonicum straw compost + 10 t/ha; B. japonicum + manure 5 t/ha + straw compost 5 t /ha. The variables observed are plant growth rate, plant growth relative and net assimilation rate. The results showed that the treatment of genistein (50 μM) decreased the plant growth rate 5-6 WAP, plant growth relative 5-6 WAP and net assimilation rate. Treatment of B. japonicum + manure 5 t/ ha + straw compost 5 t/ ha tent to increase plant growth rate, plant growth relative and net assimilation rate. The interaction between genistein induction and treatment B. japonicum + organic fertilizer tended to decrease plant growth rate, plant growth relative and net assimilation rate.

KINDS OF ORGANIC MATTER AND CALCITE CONTRIBUTION ON THE CHANGE OF IRON AND MANGANESE IN SOIL AND UPTAKE BY MAIZE AT NORTH ACEH INCEPTISOL Khusrizal
Jurnal Pertanian Tropik Vol. 2 No. 2 (2015): JURNAL PERTANIAN TROPIK
Publisher : Talenta Publisher

The Inceptisols is a soil in great amount and widely distributed in Indonesia, even in the province of Aceh Inceptisols is the most extensive amount. The Inceptisols were found from lowland up to highland, and their properties are very varied. Commonly, the soil fertility of the Inceptisols of lowland is low. Calcite and Organic Matter are the easy matter found, and to be considered as a better soil amendment. While maize is improved varieties of crops that its production constantly to be increased. This experiment was conducted in order to study the contribution of organic matter as well as calcite contribution to the change of iron and manganese in soil and uptake by maize at North Aceh Inceptisol. Kinds of organic matter that was used consist of cow manure and water hyacinth (60:40). The fully randomized design has been conducted that consists of two combined treatment factors with three replicated. The factor is related to the kinds of organic matter was 0.0, 2.0, 3.0 and 4.0 ton ha-1 and calcite was 0.0, 1.0 and 1.5 ton ha-1. The results showed that the application of organic matter and calcite significantly affect levels of iron and manganese in the soil and plants. Dose organic material 4 ton ha-1 and calcite 1.5 tons ha-1 are able to increase at the highest level of the iron content of the soil, while the dose of organic materials 4 ton ha-1 and calcite dose 0.0-1.0 tonnes ha-1 is the best for the increasing of manganese in the soil. The highest content of iron and manganese of maize crop was obtained at a dose of 6.0 tons ha-1 of organic matter without calcite application.

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Benny Hidayat

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

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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