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INDONESIA
Jurnal Agro Teknologi Tropika
Published by Universitas Riau
ISSN : -     EISSN : 23376562     DOI : -
Jurnal Agroteknologi Tropika memuat hasil-hasil penelitian mutakhir (5 tahun terakhir), ulasan singkat (review), analisis kebijakan atau catatan penelitian singkat (research note) mengenai teknik percobaan, alat, pengamatan, dan hasil awal percobaan (preliminary result) terkait bidang Ilmu Pertanian seperti : Agronomi, Pemuliaan Tanaman, Ilmu Tanah, Proteksi Tanaman, Mikrobiologi Pertanian, dan bidang ilmu pertanian terkait lainnya. Jurnal Agroteknologi Tropika terbit dua kali dalam setahun pada bulan Januari dan Juni.
Articles 58 Documents
Pengaruh Fungi Mikoriza Arbuskular Dalam Medium Zeolit Terhadap Pertumbuhan dan Intensitas Penyakit Bercak Daun Pada Bibit Kakao Sariasih, Yenny; Hadisutrisno, Bambang; Widada, Jaka
Jurnal Agro Teknologi Tropika Vol 1, No 1 (2012)
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In Indonesia, cocoa (Theobromae cacao L.) is one of the nations third-largest contributor of foreign exchange, but the problem that arises on cocoa plantations in Indonesia is the difficulty of obtaining a healthy cacao seedlings in large numbers for the rejuvenation of cocoa cropping. One of methods to obtained healthy cacao seedlings with good performance in large numbers is application of arbuscular mycorrhizal fungi (AMF). This researches aims to observe the role of AMF mass production in the zeolite medium on the growth and leaf spot intensity of cocoa seedlings. The researches were conducted at the field condition in Sleman, Yogyakarta and Mycological Laboratory of the Faculty of Agriculture and the Laboratory of Phytochemistry, Faculty of Pharmacy, University of Gadjah Mada, Yogyakarta. The main ingredient of the study is AMF mass production in the zeolite medium. The observed variables were the growth of cocoa seedlings, the number of spores from each location, the cocoa seedlings height, leaf numbers, wet weight, dry weight and root length of seedlings of cocoa, symptom and intensity of leaf spot disease, detection of salicylic acid (SA) manually and TLC methods, and environmental factors which include: temperature, humidity and light intensity. The results indicated that the only real difference in the height and number of leaves, whereas other variables were not significantly different. This is because AMF spores from all locations are derived from the similarity of the two genera, namely Glomus sp., and Gigaspora sp., and was almost the same amount. Leaf spot disease symptoms appeared only a few of the cocoa seedlings, but more due to unfavorable environmental factors and conditions are weak pathogens. Plant defense responses had not been established because the salicylic acid content in leaves of cocoa seedlings at 12 weeks has not been detected.
Model Pengelolaan Perkebunan Kelapa Sawit Berkelanjutan Pada Lahan Gambut di Provinsi Riau Nasrul, Besri; Hamzah, Anthony; Nedi, Syahril
Jurnal Agro Teknologi Tropika Vol 1, No 01 (2012)
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A model of sustainable oil palm management in the tropical peatlands in Riau, precise and comprehensive data ofland and social economic farmers are required. The research has conducted in the Riau District four months by usingfield survey on land unit. The lands were had evaluated by maximum limiting factors and the socio-economic werecalculated by Multi-Dimensional Scaling. Oil palm development exist in the peatland affected on: 1) DHL score whichexceeds saturation level of 4 mS, and the highest score in Bengkalis 107,32 mS; 2) Land subsidence > 6 cm year-1especially Rokan Hilir have 18 cm year-1; 3) Change of ground water exceeding value float for oil palm (60 cm), highestvalue there was Siak 30-95 cm; 4) Level continue oil palm plantation in peatlands for the ecology dimension showedindex 47,35% (less have continuation) with ecology factor having an effect: water level, prevention of burning land,usage of amelioran /fertilization, and specific of site technology; 5) For social dimension showed index 55,65% (enoughhave continuation) with social factor having an effect: community empowerment, policy synchronization, solving of sosio-conflict, and weak of law straightening; 6) For economic dimension showed index 68,62% (enough have continuation)with economic factor having an effect: capital structure, price of fruit, and production equipments.
Respon Pertumbuhan Bibit Kelapa Sawit (Elaeis guineensis Jacq.) Pada Medium Gambut Dengan Berbagai Periode Penggenangan , Nurbaiti; Yulia, Arnis En; Sitorus, Jujung
Jurnal Agro Teknologi Tropika Vol 1, No 1 (2012)
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The research has conducted at the green house of Faculty of Agriculture, Riau University from September 2011 toDecember 2011, to study the growth response of palm oil seedling on peat soil with different flooding periods. Theexperimental units were arranged in Completely Randomized Design (CRD) with three treatment flooding periods and sixreplications. Three flooding periods were: no flooding, 5 days of flooding period and 10 days of flooding period. The datawere analyzed by ANOVA and Duncan’s New Multiple Range Test. (DNMRT) at level 5%. The result showed that theperiodical flooding inhibited the enhancement of plant height, leaves number, stem diameter, primary roots number, rootvolume and dry weight palm oil seedlings but enhanced shoot the root ratio. Palm oil seedling could survive by periodicalflooding condition by forming adventitious roots. The number of adventitious roots in the 10 days flooding period weresignificantly different from these the 5 days flooding.
Induksi Kalus Kenerak (Goniothalamus umbrosus) Berdasarkan Jenis Eksplan Menggunakan Metode In Vitro Mahadi, Imam
Jurnal Agro Teknologi Tropika Vol 1, No 01 (2012)
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A research on callus induction of kenerak (Goniothalamus umbrosus) from seed, leaf, stem and root explant wasconducted. Results showed that, seeds explant is the best on callus initiation using MS D10 (5,0 mg/l 2,4-D + 0,1 mg/lBAP) medium after 24 weeks cultured in light. However, mosf of all explants from leaves, stem and root formed callus onMS E8 ((3,0 mg/l 2,4-D + 0,5 mg/l BAP) and E10 ((5,0 mg/l 2,4-D + 0,5 mg/l BAP) medium after 2-6 weeks cultured inlight, respectively. Meanwhile for optimum callus proliferation, the suggessted medium was MS E10 ((5,0 mg/l 2,4-D +0,5 mg/l BAP).Therefore, in vitro technique can be used to produce callus of kenerak.
Pemberian Pupuk Anorganik dan Air Pada Tanah Gambut Terhadap Pertumbuhan Kelapa Sawit di Pre-Nursery , Gusmawartati; , Wardati
Jurnal Agro Teknologi Tropika Vol 1, No 1 (2012)
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The objective of this research was to study the optimal waters requirement of palm oil seedling at pre-nursery peatsoil which is applied with in-organic fertilizer to enhance growth of oil palm on pre-nursery in peat soil. The research hasconducted on peat soil growth media, taken from Desa Rimbo Panjang Kab. Kampar, Province of Riau. The experimentalunits were arranged in Factorial Completely Randomized Design with three replications. The first factor is: 0, 1⁄2 and 1times of recommended dosage. The second factor is: 2, 3 and 4 (times/day) of watering. Parameters studied were anincrease seedling height, number of leaves and stem diameter. The results showed that application of in-organic fertilizerwith 1 time of recommended dosage in 2 times of watering/day in trended to give the best growth of oil palm seedlings,which was equal to growth standard recommended by the Indonesian Palm Oil Research Center.
Perubahan Fraksi P-Inorganik dan P-Organik Pada Bahan Tanah Gambut Yang Diaplikasi Dengan Fosfat Alam Pada Kondisi Kapasitas Lapang dan Tergenang , Nelvia; Sabiham, Supiandi; Anas, Iswandi
Jurnal Agro Teknologi Tropika Vol 1, No 1 (2012)
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The very high acidity of peat soil is mainly caused by high H+ concentration that can change the base cation likeK , Na+, Ca+ and Mg2+ from mineral/rock structure. The research was conducted in laboratory of the Departement ofSoil Science, Faculty of Agriculture, IPB. Peat soils at hemic degree of decomposition level were taken from Riau. Rockphosphates in this research (P and Fe sources) were the rock phosphates of Huinan China, Christmas Island and PTPetrokimia Gresik the content 32,65; 31,28 and 25,02% of P 2 O 5 and 2,28; 11,19 and 18,72% of R 2 O 3 (Fe 2 O 3 + Al 2 O 3 )respectively. The aims of the research were to study the changes of the forms of readily labile inorganic-P and organic-P,moderately labile inorganic-P and organic-P and non labile organic-P in peats after being incubated with rockphosphates. The results showed that the application of rock phosphates in peat soil increased the readily of labileinorganic-P and organic-P, moderately inorganic-P and organic-P, and non labile P forms. An increase of non labile Pand moderately labile P were higher dye to the R 2 O 3 content of rock phosphates became higher in saturated and fieldcapacity condition. The results also showed that the rock phosphates applied to the peat soil released P in a very highamounts, in the order of rock phosphates of Huinan China > Christmas Island > PT Petrokimia Gresik. Released P wasdetermined by water extraction which increased with the periods of incubation with the similar pattern on the three typesof rock phosphates.
Uji Daya Hasil Beberapa Genotipe Cabai (Capsicum annuum L.) Toleran pada Lahan Gambut
Jurnal Agro Teknologi Tropika Vol 1, No 2 (2012)
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The objective of this research was to evaluate the yield of several genotypes of chili peppers which are to peat soiltolerant. The research was arranged in Randomized Block Design (RBD) consisting of 20 treatments with threereplications. The treatment consisted of 20 genotypes of chili i.e.: genotype C2, C120, C51, C111, C105, C117, C118,C157, C159, F5110005-91-13-5, F5110005-91-13-12, F8002005-2-9-12-1, C140, C5, C18, C19, C143, F512005-5-11-1, C145 and C160. Parameters observed were: the age of flower appearance, height dicotomous, plant height, stemdiameter, canopy width, leaf length, leaf width, age of harvest, fruit length, stalk length of fruit, fruit diameter, weight perfruit, fruit weight per plant. The results showed that all genotypes had variouses adaptability in peat soil. C118 andC160 gave the lowest yield, C18 and C105 gave the medium yield, whereas C2 and C143 gave the highest yield.Keywords: Capsicum annum, peat soil, yield.
Kajian Tingkat Erosi pada Penggunaan Lahan Kelapa Sawit (Elaeis guineensis Jack) di Sub DAS Tapung Kiri
Jurnal Agro Teknologi Tropika Vol 1, No 2 (2012)
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The objective of this research is to observe the erodibility of Sub DAS Tapung Kiri at the Kelapa sawit land systemin Rokan Hulu District and Kampar District. Besides that, the purpose of the research is to know the dominant factorsthat influence the erotion value. The research used surver nethod based on information graphis overlay map with theland unit system, overlay topographic map interpretation, land map system and soil map. The value of erodibility scoresusing prediction erodibility USLE RKLSCP and regression analyses backward elimination to study the dominant factorinfluenced erodibility values. The result showed that there was a variation of TBE on Sub DAS Tapung Kiri with the palmof land system which classified as i.e. low, midlle, and high the highest index of erodibility was found at location 4(Petapahan 2) 15,5. Based on analysis regression backward elimination, there were two dominant factors found: slopelength factor and erodibility factor.Keywords: Erotion, USLE, Sub DAS Tapung
Optimalisasi Produksi Kedelai [Glysine max (L) Merril] pada Kebun Kelapa Sawit di Lahan Gambut dengan Aplikasi Beberapa Komposisi Pupuk dan Pembenah Tanah
Jurnal Agro Teknologi Tropika Vol 1, No 2 (2012)
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Planting soybean among oil palm plantations on peat land, with the addition of nutrients and ameliorant with acertain incubation of period, can maintain availability of nutrients for both plants. A research has been by using acompletely randomized design (CRD) consisting of 5 in organic fertilizer and soil ameliorants as treatments and 4replications. The objective of this research is to optimize the production of soybean plants and to formulate package ofefficient technology and environmentally friendly. The results indicated that the use of ameliorant ash organic matterand ash, with a minimum of inorganic fertilizer, application the best effect on the growth and production of soybean gavethe highest production efficiency obtained at 25% of inorganic fertilizer application 15 tons of organic material, 3 tonsof ash after 2 weeks of incubator period This 3 treatments gave 170% higher production than that of no application.Keywords: soybean, fertilizer composition, production
Efisiensi Penggunaan Kalium Pupuk Oleh Beberapa Galur Kedelai (Glycine max (L) Merrill)
Jurnal Agro Teknologi Tropika Vol 1, No 2 (2012)
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In recent years, the main problem in agriculture practices is how to increase the efficiency of K fertilization toachieve high productivity, in both quantity and quality. Potassium fertilizer applied is not completely absorbed by plantduo to nutrient loss from root zone and converting to unavailable form. Beside that, soybean requirement in Indonesiaevery year always mount along with accretion of resident. To fulfill the requirement have to be imported becausedomestic product not yet earned to answer the demand the requirement. Therefore these problems, coupled with increasinguse of K fertilizer and the fact that fertilizer of K are expensive, point to the need that the fertilizer is more and moreimportant. To overcome these problems, efforts need to be corrected to increasing the efficiency of nutrient uptake,especially uptake K nutrient by soybean plant from application of K fertilizer and increasing yield efficiency of seedsoybean for every unit of K fertilizer applied. One of the means to achieve these is used of lines soybeans as will newvarieties, which have superiority of character, and efficiency in K fertilizer uptake. This research aims to know how biguse efficiency fertilizer of potassium at some soybean lines and to see the response of some soybean lines to gift ofpotassium. This research has been executed in Research Site of the Faculty of Agriculture, University of Riau. TheResearch is executed during four months, started from April until July 2010. Desain used by the Randomized Blok Design(RAK) with two factors. The first factor is the genotype of soybean, i.e.: line 11 AB, line 13 ED, line 14 DD, line 19 BE,and line 25 EC. The second factor is the rate of potassium fertilizer, i.e.: without potassium, 50 kg KCl/ha, 100 kg KCl/ha. Hence, there were 15 treatment combinations, each with three replications.The results showed that the effect of Kfertilizer was not significant on parameter of absorption of potassium, efficiency of potassium absorption, produce seedsper plot and efficiency of seed produced. Among the five genotypes, line 14 DD shows responsifity to application ofpotassium fertilizer at rate 50 kg KCl/ha and also 100 kg KCl/ha, was indicated by positive value on parameterefficiency of seed produced, efficiency of potassium absorption and production of seed per plot. Where as the others linesof soybean indicated negative value on the efficiency of potassium absorption and the efficiency of seed production,meant the application of K fertilizer 50 kg KCl/ha and 100 kg KCl/ha were lower production than without K fertilizerapplication. In general, K fertilizer application on the soil which have moderately low K (0,35 cmol(+)/kg) were notefficient to increase seed production of soybeans, except on lines 13 ED and 14 DD were efficiency if giving 50 kg KCl/ha.Keywords: efficiency, potassium fertilizer, soybean