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INDONESIA
Jurnal Agro Teknologi Tropika
Published by Universitas Riau
ISSN : -     EISSN : 23376562     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
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.
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Articles 58 Documents
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Serapan Hara N, P, K dan Pertumbuhan Tanaman Padi (Oryza sativa L.) di Medium Gambut yang Diaplikasikan Amelioran Dregs dan Pupuk N, P, K
Jurnal Agro Teknologi Tropika Vol 1, No 2 (2012)
Publisher : Jurnal Agro Teknologi Tropika

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Abstract

Peat soil is one of the ecosystems which considerable potential in Riau Province to be developed as agricultural land.Besides low nutrient availability, other factors that inhibit the growth of plants on peat soil are higher organic acid content.To overcome this, dregs can be applied. The research has been conducted the experimental farm of Agriculture Faculty,University of Riau, Pekanbaru on April-Augst 2011. The experimental units were arranged in factorial completely rendomizeddesign. The first factor is the dose of dregs consisting of three levels: D0 = without giving dregs, D1 = 2.5 tons/ha of dreg,and D2 = 5 tons/ha of dreg. The second factor is the dose of N, P, and K fertilizers consisting of three levels: P1 =recommended dosage, P2 = 1.5 x the recommended dosage, and P3 = 2 x recommended dosage. The results showed that thedoses of dregs at 2.5 tons/ha and 5 tons/ha in general tended to increase the height, the maximum number of tillers, dryweight of roots, and plant canopy dry weight at age 48 HST, comparing to no dregs at each dose of N, P, and K fertilizers(1, 1.5 and 2 times the recommended dosage). Nutrient of N absorption by roots and canopy, respectively increased by29.87% and 299.08%, nutrient of P absorption by roots and canopy increased by 13.89% and 239.52, and nutrient of Kabsorption by roots and canopy increased by 16.97% and 153% with the application of 5 tons/ha dregs followed by theapplication of N, P, K fertilizer with 2 times of the recommended dosage compared to the application of N, P, K fertilizer with1 times of the recommended dosage that followed no dregs application.Keywords: peat soil, paddy, ameliorant dregs, NPK nutrient
Pengaruh Pemberian Berbagai Macam Kompos pada Lahan Ultisol terhadap Pertumbuhan dan Produksi Jagung Manis (Zea mays Saccharata Sturt)
Jurnal Agro Teknologi Tropika Vol 1, No 2 (2012)
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Sweet corn has a high nutrient content, have a good taste for the public, so that demand is rising but it is notaccompanied by an increase in production, so that there is insufficient supply of sweet corn. Compost is one of organicfertilizer derived from the rest waste of animal or plant. Ultisol soil has relatively low acidity levels, dosages of fertilizer, andthe availability of organic matter and other obstacles in agriculture. One way to overcome this problem is by composting.The purpose of this research was to determine the effect of good compost from the growth and production of sweet corn.This research has been completed in the site of Faculty of Agriculture, University of Riau using a Complete RandomizedDesign with 6 treatments and 4 replications. The further test has conducted using DNMRT 5%. The result showed that amixture of compost and stover rice straw rice straw compost will provide a high return on investment of growth andproduction of sweet corn.Keyword : sweet corn, ultisol soil, compost
Patogenisitas Beberapa Isolat Cendawan Entomopatogen terhadap Coptotermes curvignathus Holmgren dan Schedorhinotermes javanicus Kemmer Harahap, Idham Sakti
Jurnal Agro Teknologi Tropika Vol 2, No 1 (2013)
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Abstract

Pengendalian hayati rayap Coptotermes curvignathus dan Schedorhinotermes javanicus dengan menggunakan beberapa isolat cendawan entomopatogen merupakan salah satu alternatif untuk pengendalian rayap tanah yang ramah lingkungan. Penelitian ini bertujuan untuk mempelajari patogenisitas cendawan entomopatogen isolat Indonesia Metarhizium anisopliae, M. brunneum, B. bassiana, dan Myrothecium roridum dan menguji keefektifannya terhadap rayap tanah C. curvignathus dan S. Javanicus. Uji patogenisitas beberapa isolat cendawan entomopatogen terhadap C. curvignathus dan S. javanicus dilakukan dengan pencelupan rayap ke dalam suspensi konidia, masing-masing dengan kerapatan 0,105,5x105,106,5x106,dan 107 konidia per ml, setiap perlakuan diulang lima kali. Sporulasi pada tubuh rayap dihitung dari rayap C. curvignathus yang telah mati pada uji patogenisitas. Data yang diperoleh dianalisis dengan sidik ragam dan uji lanjut selang ganda Duncan pada taraf nyata 5%. Hubungan kerapatan konidia dengan mortalitas dan waktu aplikasi dengan mortalitas diolah dengan analisis probit. Berdasarkan hasil analisis probit dapat diperoleh nilai LC dan LT. Patogenisitas M. brunneum terhadap rayap S. javanicus dan C. curvignathus lebih tinggi dibandingkan dengan M. anisopliae, Beauveria bassiana, dan Myrothecium roridum. Sporulasi M. brunneum lebih tinggi dari pada M. roridum maupun B. bassiana dan sporulasi terendah terdapat pada B. bassiana. Viabilitas M. brunneum tidak berbeda nyata dengan M. roridum dan viabilitas B. bassiana berbeda nyata dengan M. roridum.Kata kunci : cendawan entomopatogen, M. brunneum, rayap
Kekerabatan Genetik Tanaman Jambu Bol (Syzygium malaccense [L.] Merr. & Perry) Berdasarkan Penanda RAPD (Random Amplified Polymorphic DNA)
Jurnal Agro Teknologi Tropika Vol 2, No 1 (2013)
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Jambu bol (Syzygium malaccense [L.] Merr. & Perry) has significant economic value, as a fruit crop and medicinal plants.This research aims to study the level of genetic diversity and relationship among S. malaccense crops from Kampar districtbased on RAPD marker. Six cultivars of S. malaccense were analyzed using ten random primers. The results of this researchshowed that ten selected primers produced 219 fragments of DNA band ranging from 188-2028 bp. The genetic diversity of S.malaccense is 0.304, and the genetic distances among cultivars ranges from 0.253 to 0.631. Based on UPGMA dendogram, S.Malaccense can be divided into four groups. The first group of S. malaccense is without seeds (JTB), second group is S.malaccense red fruits (JBM), S. malaccense local (JKL) and S. malaccense with greenish white fruits (JPK), third group is S.malaccense white fruits (JBP) and last group is S. malaccense small leaves (JDK). The result of this study can be utilized bybreeders to formulate the genetic improvement program of S. malaccense in the future.Key words: genetic relationship, Syzygium malaccense, RAPD marker
Pemanfaatan Mulsa Organik Pueraria javanica dan Kompos Pelepah Kelapa Sawit Terhadap Penghambatan Perkecambahan dan Pertumbuhan Anakan Gulma Borreria alata (Aublet) DC
Jurnal Agro Teknologi Tropika Vol 2, No 1 (2013)
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The objectives of this research is to evaluate the effect of two organic mulches of Pueraria javanica and the palm oilstem compost with different thickness on seed germination and growth of Borreria alata. The observed data wereanalyzed using Analysis of Variance (ANOVA) and the significant differences among the treatment means were determinedusing Duncan’s Multiple Range test with test level 5%. The results showed that all organic mulches decreased B. alatagermination and growth germination and growth. Mulch of Pueraria javanica with thickness of 2.5 cm reduced weedgermination as much as 76.29% and growth 44.26%. Palm oil stem compost with thickness of 2.5 cm gave the significanteffect on the decrease of weed germination i.e 86.60% and growth i.e 32.79%. The 7.5 cm and 12.5 cm thickness mulchingwith P. javanica and palm oil stem compost gave no germination of weeds.Keywords: Borreria alata, organic mulch, Pueraria javanica, palm oil stem compost
Pengaruh Perubahan Penggunaan Lahan Hutan Rawa Gambut Menjadi Hutan Tanaman Industri (HTI) Acacia Crassicarpa Terhadap Sifat Fisik dan Kimia Tanah Gambut
Jurnal Agro Teknologi Tropika Vol 2, No 1 (2013)
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This research to know lands use change from peat bog forest to industrial forest Acacia crassicarpa on physical and chemical properties of peat soil. This research had been done in area of PT. BBHA, Bukit Batu subdistrict, Bengkalis, started from May until July 2013. Method of this research was survey with use purposive sampling. The data was analysed by descriptive and graphics model. The parameters were detected namely particle size distribution, bulk density, particle density, porosity, pH, organic carbon, total nitrogen, total phosphor and Base Cations (K, Ca, Mg, Na). The result of research show that lands use change from peat bog forest to industrial forest Acacia crassicarpa was increasing and repairing some physical and chemical properties of peat soil, total of smalles particle, bulk density, particle density, pH, organic carbon, total nitrogen, total phosphor and Base Cations (K, Ca, Mg, Na).Keywords: peat bog, plantation forest, physical properties, chemical properties
Pemanfaatan Kompos Kulit Buah Kakao Pada Pertumbuhan Bibit Kakao Hibrida (Theobroma cacao L)
Jurnal Agro Teknologi Tropika Vol 2, No 1 (2013)
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Cacao (Theobroma cacao L) is one of the potential export commodity as foreign exchange income. Beside thedemand for cacao keep increasing cause of cacao processing industrial growth. The cocoa cultivation start frompreparing the seeds from a fine variety and applying right cultivation methode. This research aimed to determine theeffect of cacao pods compost on the growth of cocoa hybrid seedlings and was held on Engineering Laboratory, Facultyof Agriculture, University of Riau for 6 months, starting from May to October 2012. The design used was CompletelyRandomized Design (CRD), which consists of 5 treatments that are 0, 25, 50, 75 and 100 gram per polybag of cacao podscompost and 3 replications for each treatment. The provision of treatment which show that by giving cacao podscompost with dose of 100 g per polybag gave best seedling growth than another treatments.Keywords : hybrid cacao , compost, cacao pods
Identifikasi, Intensitas dan Persentase Serangan Hama Helopeltis sp. (Hemiptera: Miridae) pada Acacia mangium Willd. Sucahyono, Muhamad Pangky
Jurnal Agro Teknologi Tropika Vol 2, No 1 (2013)
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One of the problems in the management of Acacia mangium is Helopeltis sp. infestation. Current research andreport on Helopeltis sp. as the pest on A. mangium are not much, so it is necessary to identify this pest and it’s damagelevel. The research aims to identify the spesies of Helopeltis on A. mangium and to observe the intensity and percentageof their infestation. Identified Helopeltis sp. was taken from A. mangium plant in the field. The identification was held inthe laboratory. The intensity and percentage of infestation conducted in three different locations on 1, 2, 3, 4, 5, and 6months old plantation. The plot unit samples were taken with transect line methods. The observation of the damage wasevaluated by giving the score for each plant according to it’s severity. Helopeltis sp. that giving A. mangium is H.theivora, with intensity and percentage of infestation on 6 months was 56.55% and 100%. The intensity and percentageof infestation of H. theivora on the A. mangium decreased from 3 months to 6 months on plants.Keywords: Identification, intensity of infestation, percentage of infestation
Fase Perkembangan Bunga dan Kandungan Gula Endogen pada Pembungaan Hoya diversifolia Blume. Ardie, Sintho Wahyuning
Jurnal Agro Teknologi Tropika Vol 3, No 1 (2014)
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Hoya diversifolia Blume (Asclepiadaceae) is one of Indonesian’s native plants that has potential to be developedas ornamental plant. The short flowering period in one year, however, is a big problem in developing Hoya as anornamental plant. The objective of this research was to determine the flower developmental phases and to study thecorrelation of endogenous sugar content with floral induction of H. diversifolia Bl. Morphological and anatomicalobservations showed that floral development of H. diversifolia Bl. consisted of 6 phases i.e. induction, early initiation,late initiation, differentiation, flower maturity, and anthesis. Total sugars and sucrose content were not significantlydifferent between inductive and non-inductive buds, while the amount of reducing sugar were significantly higher in theinductive buds (7.40 mg g-1 fresh weight) compared to non-inductive buds (4.14 mg g-1 fresh weight).Key words: Asclepiadaceae, flowering plant, Indonesian native ornamental plant
Perkembangan Biji dan Mutu Benih Beberapa Genotipe Kedelai yang Diberi Pupuk P
Jurnal Agro Teknologi Tropika Vol 3, No 1 (2014)
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The objective of this study was to determine the impact of phosphorous (P) fertilizer on soybean seed dry weight andseed quality during seed development. Four genotypes of soybean ie; G1=Willis, G2=Malabar, G3=KM-19 BE, andG4=Kipas Putih were planted in an experiment arranged in a completely randomized block design consisting of threerates of P fertilizer including P0=0 kg P2O5/ha, P1=25 kg P2O5/ha, P2=50 kg P2O5/ha were applied to every genotype.Beginning 20 days after flowering, fresh weight and dry weight of the seed were collected every five days while seedquality components were observed every teen days from each plot. Fresh and dry weight were plotted to the graphs andanalysis of variance were performed to seed quality. The results showed that the seed development was slow until 20 daysafter flowering (DAF) but both tend to steadily increase then until around 40 DAF and then started to levelling off until50 DAF. Seed viability and seed vigor remained low until 30 HSP and achieved reached maximum values at around 40to 50 DAF. Applying P fertilizer at a rate of 50 kg P2O5 per ha accelerated grain filling and increased the germination rateof the seed harvested at beginning 20 DAF to 40 DAF on every genotype. This result implied that genotypes respondeddifferently to fertilizer P as indicated by differences in seed weight and seed quality during seed development.Keywords : seed development, viability, vigor, soybean

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