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AGROEKOTEKNOLOGI

agroekoteknologi
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Published by Universitas Sumatera Utara

ISSN : 23376597 EISSN : - DOI : -

Core Subject : Agriculture,

Agriculture, Biological Sciences & Forestry

Jurnal AGROEKOTEKNOLOGI merupakan jurnal ilmiah yang diterbitkan secara online berisikan hasil-hasil penelitian tentang hama dan penyakit tumbuhan, agronomi, pemuliaan tanaman dan ilmu tanah

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Articles 39 Documents

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Search results for , issue "Vol 3, No 3 (2015)" : 39 Documents clear

Pengaruh BAP ( 6-Benzylaminopurine ) dan Pupuk Nitrogen terhadap Pertumbuhan dan Produksi Bawang Merah (Allium ascalonicum L.) Ramosta Simajuntak hidayat; Rosita Sipayung; Meiriani Meiriani
Jurnal Agroekoteknologi Vol 3, No 3 (2015)
Publisher : Universitas Sumatera Utara

BAP has a fuction to accelerate the formation of buds and accelerate the growth of vegetative. Nitrogen fertilizer a fuction to inrease of vegetative growth. This reasearh was conducted at experimental field of college agriculture The Sumatera Utara University in June until August 2014. The design of the experiment was randomized block design arranged in factorial with two factors. The first factor was the BAP with 4 levels of each B0 (0 ppm), B1 (20 ppm), B2 (20 ppm) and B3 (30 ppm). The second factor was the nitrogen fertilizer with 4 level of each N0 (0 g/plant). N1 (0.4 g/plant, N2 (0.8 g/plant), N3 (1.2 g/plant). The results showed the giving of BAP until 20 ppm has a significantly effect increase plant height, number of leaves, number of bulb at 1-2 MST. The nitrogen fertilizer treatment has a significantly effect towarde plant height 8 MST, totally leaf area, plant rate growth, greenish leaf and dry weight per sample. The interaction BAP and nitrogen fertilizer has not a significantly for all parameters.Key words : 6-Benzylaminopurin, nitrogen, shallot

Kajian Selektivitas Erosi Pada Lahan Budidaya Padi Gogo Di Desa Lau Damak Kecamatan Bahorok Kabupaten Langkat Rika Tamika; Abdul Rauf; Purba Marpaung
Jurnal Agroekoteknologi Vol 3, No 3 (2015)
Publisher : Universitas Sumatera Utara

Gogo rice as one of many commodities developed on sloping topography, thus potentially increasing run off a water and soil erosion that will transport nutrients to the other place. The aim of the research was to know the Erosion Selectivity on Land Cultivation of Gogo Rice in Countryside of Lau Damak Distric of Bahorok Sub-Province Langkat. The research was conducted from September until November 2014 through 2 stages of activity, it was fieldwork and laboratory activities. The Stages of fieldwork has done in village at Lau Damak District of Bahorok Langkat on 15% slope. The results of field activities was analysis in agriculture faculty laboratory,University of North Sumatra, Medan. The reseach use a t-test to differentiate the nutrients at upper, center, and bottom of the slope. The selectivity of erosion can be seen from the changes in the levels of clay and organic Carbon in the upper, middle and lower slopes. Selectivity erosion can also be seen from the changes, total-N, available P, pH, K, CEC, and soil texture on the part of the slope.The results showed that the Organic Carbon and Total-Nitrogen were significantly differenton the slopes position.Key words : Soil Erosion, selectivity erosion, gogo rice

Studi Pertumbuhan dan Produksi Dua Varietas Bawang Merah (Allium ascalonicum L.) Terhadap Waktu Penyiangan Gulma Josua Bonar Pohan; lisa Mawarni; Toga Simanungkalit
Jurnal Agroekoteknologi Vol 3, No 3 (2015)
Publisher : Universitas Sumatera Utara

The time of weeding between weed and shallots can influence the decreasing of growth and productions. The uncorrect time of weeding can make looses. This research had been conducted at Simalingkar residences in Juny until September 2014 using factorial randomized block design with two factor, The first factor was 7 times of weeding K1: clean of weed for 0-3 weeks, K2 : clean of weed for 0-5 weeks, K3: clean of weed for 0-7 weeks, K4: without of weed for 0-3 weeks, K5: without of weed for 0-5 week, K6: without of weed for 0-7 weeks, and K7: clean of weed until harvest and two factor as varieties namely V1 Bima and V2 Medan. The parameters were plant height per tuber, number of leaves per tuber, numbers of tillersper hill, fresh tuber production per plot, dried tuber production per plot, kind of weed .The result showed that the time of weeding significantly decrease plant height of 3 weeks after plants (wap) and number of leaves at 5 wap .Keywords: the time of weeding, varieties, growth and yields, shallots

Identifikasi dan Inventarisasi Genotip Tanaman Ubi kayu (Manihot esculenta Crantz) di Kabupaten Serdang Bedagai Sumatera Utara Muhammad Fauzi; Emmy Harso Kardhinata; Lollie Agustina P Putri
Jurnal Agroekoteknologi Vol 3, No 3 (2015)
Publisher : Universitas Sumatera Utara

The objective of this research was to document and characterize phenotypically cassava genotypes. Using survey methodology, the sample of cassava genotypes were collected from three sub-districts of Serdang Bedagai Regency, i.e. Perbaungan, Serbajadi, and Dolok Masihul with three villages for each sub-district, i.e. Jambur Pulau, Suka Jadi, Lidah Tanah, Tanjung Harap, Kuala Bali, Karang Tengah, Dolok Manampang, Kota Tengah, and Kampung Mangga. This descriptor list aims at helping to standardize characterization data was taken from National Commision for Genetic Resources 2014 i.e; the ratio of lobe length to lobe width of of central leaf lobe, number of leaf lobe, petiole length, petiole color, plant height, distance between lef scar, color of upper stem, color of stem exterior, color of stem epidermis, diameter of cassava root, length of cassava root, number of cassava root/plant, average of cassava root weight, and cassava productivities. The result of research showed the specific characteristics of cassavas which have different lower and upper stem in case of color which were green, reddish green, grey, and amber; different colors of cassava root cortex which were rose/ white, yellow, and amber. The result obtained 7 genotypes of cassava that with various local name depend on the lecation i,e; Malaysia, Roti, Adira-1, Kalimantan (Banjar), Valencia, Lampung and Pulut.Keywords: Cassava, identification, inventarisation

Respons Pertumbuhan Bibit Bud Chips Tebu (Saccharum officinarum L.) terhadap Dosis dan Frekuensi Pemberian Pupuk N, P dan K pada Wadah Pembibitan yang Berbeda Riki Rikardo Situmpul; Ferry Ezra Sitepu; Meiriani Meiriani
Jurnal Agroekoteknologi Vol 3, No 3 (2015)
Publisher : Universitas Sumatera Utara

Provision of sugarcane seed with hight quality bud chips technic be affected by availability of nutriens in the soils requiring fertilization to nutrient requitments sugar cane seed. The research was conducted at nursery PT. Perkebunan Nusantara II Tanjung Jati, Binjai (40-50 meters above sea) from Mei-August 2014 using factorials split plot design with three factors: container nursery (polybag and pottray), dose fertilizer of N (Urea), P (SP-36), K (KCl) (6 g/60 plant, 12 g/60 plant, 18 g/60 plant) and frecuent fertilizer (2 times, 3 times, 4 times). The results showed using polybag effected significantly increase stem hight 32%, number of leaf 18%, stem diameters 48% and number of tillers 51% than using pottray. Dose fertilizers 18 g/60 plant effected significantly to stem hight, number of leaf and stem diameters of. Frecuent fertilizers not effected significantly to all of observed parameters.Keywords : Sugarcane, Containers nursery, Dose and Frecuent fertilizer

Pengaruh pH Terhadap Pembentukan Bintil Akar , Serapan Hara N, Pdan Produksi Tanaman pada Beberapa Varietas Kedelai pada Tanah Inseptisol Di Rumah Kasa Danu Syahputra Lubis; Asmarlaili S. Hanafiah; Mariani Sembiring
Jurnal Agroekoteknologi Vol 3, No 3 (2015)
Publisher : Universitas Sumatera Utara

Indonesia is an agrarian country which focuses on agriculture sector, but has a lot of acid reaction soil. Among all plant species for cultivation activity, soybean is one of the most often plant which use for cultivation activity in Indonesia. The Purpose of this research is finding the effect of pH on root nodule formation, nitrogen and phosphorusuptake and crop production on some varieties of soybean in Inceptisol at screen house. This research use randomized block design factorial method, with 2 factor, first was pH, second was soybean varieties which quantity and weight of root nodule, plant’s nitrogen and phosphorus content, plant’s nitrogen and phosphorus uptake, soil pH, dry plant weight, and also quantity of pod plant as the parameter. The result of this research show that Tanggamus was the variety which had quantity of pod most is about 108 and also the most high nitrogen content 3.218 % in both condition of pH.Keyword : Soil pH,Soybean, Root Nodule, Nitrogen, phosphorus

Pengaruh Cordyceps militaris terhadap mortalitas rayap (Coptotermes curvignathus Holmgren) (Isoptera: Rhinotermitidae) di laboratorium Arkhiadi Benauli Tarigan; Maryani Cyccu Tobing; Syahrial Oemry
Jurnal Agroekoteknologi Vol 3, No 3 (2015)
Publisher : Universitas Sumatera Utara

The influence of Cordyceps militaris on Coptotermes curvignathus Holmgren. (Isoptera: Rhinotermitidae) mortality in laboratory. This research was to study influence of entomophatogen fungus C. militaris against C. curvignathus in laboratory. This study was conducted in Pest Laboratory of Agriculture Faculty, University of Sumatera Utara, Medan during of October 2014 with using completely randomized design (CRD) nonfactorial with nine treatments and three replications : control, C. militaris sprayed (10, 20, 30 and 40 g/ 100 ml water), C. militaris sowed (10, 20, 30 and 40 g). The results showed that the highest mortality (100%) of C. militaris on sprayed 30 and 40 g/ 100 ml water and sowed 30 and 40 g in seventh day; the lowest (78.33%) on C. militaris sprayed 10 g/ 100 ml water. Termites was infected by C. militaris suffered mimification and after a few days the colonies was growth with white colored (micelium) around the body. The fastest of mortality time at 50% was 3.67 days on C. militaris sowed 40 g and the longest was 5.00 days on C. militaris sprayed 10 g/ 100 ml water and C. militaris sowed 10 g.Keywords : Coptotermes curvignathus, Cordyceps militaris, mortality, spray, sowe

Enkapsulasi Beberapa Jenis Trichoderma. sp. pada Benih Kedelai untuk Mengendalikan Penyakit Sclerotium rolfsii Sacc. Eli Saputri; Lisnawita Lisnawita; Mukhtar Iskandar Pinem
Jurnal Agroekoteknologi Vol 3, No 3 (2015)
Publisher : Universitas Sumatera Utara

Encapsulation of Some Trichoderma sp. on Soybean Seed to Control Sclerotium rolfsii Sacc. The research aimed was to get species of Trichoderma which mixed alginat or tapioca encapsulated soybean seed to inhibiting S. rolfsii. This research was conducted in Laboratory of Plant Disease, Faculty of Agriculture, University of Sumatera Utara, use Randomized Block Design 3 factors and sixteen treatments : alginate, tapioca, alginate + S. rolfsii, tapioca + S. rolfsii, alginate + T. harzianum, tapioca + T. harzianum, alginate + T. koningii, tapioca + T. koningii, alginate + T. viridae, tapioca + T. viridae, alginate + T. harzianum + S. rolfsii, tapioca + T. harzianum + S. rolfsii, alginate + T. koningii + S. rolfsii, tapioca + T. koningii + S. rolfsii, alginate + T. viridae + S . rolfsii, tapioca + T. viridae + S. rolfsi, respectively with four replications. The result showed that all of Trichoderma sp. isolates which mixed alginat or tapioca have high viability in inhibiting S. rolfsii. All of Trichoderma isolates enabled to reduce damping off on soybean seed. The treatments alginate + T. harzianum + S. rolfsii, tapioca + T. harzianum + S. rolfsii, alginate + T. koningii + S. rolfsii have high viability in inhibiting damping off by 100 % and followed tapioca + T. viridae + S. rolfsi and alginate + T. viridae + S . rolfsii (75%) and tapioca + T. koningii + S. rolfsii (50%).Key words: encapsulated, damping off, Sclerotium rolfsii, Trichoderma sp.

Pengaruh Jenis dan Lama Perendaman Krioprotektan Terhadap Viabilitas Benih Rosella (Hibiscus sabdariffa L.) Secara Kriopreservasi Ahmad Afandy Harahap; Haryati Haryati; Luthfi A. M. Siregar
Jurnal Agroekoteknologi Vol 3, No 3 (2015)
Publisher : Universitas Sumatera Utara

Cryopreservation is a technique for long-term storage nuftah plasma. In this technique cells and meristem or other parts of plants were frozen and stored in liquid nitrogen at a temperature -196°C. The objective of the reseacrh was to know effects of type and duration of soaking cryoprotectant on the viability of roselle seed in cryopreservation. This research was conducted at the Laboratory of Seed Technology Faculty of Agriculture, University of North Sumatra, Medan with a height ± 25 meters above sea level, from September to October 2014, using a randomized block design with 2 factors. The first factor is the type of cryoprotectant with 4 type of PVS1 ; PVS2; PVS3; PVS4 and the second factor of soaking cryoprotectant with 3 levels of 60 minutes; 90 minutes; 120 minutes. Parameter observed were the rate of germination (day), normal seedling (%), abnormal seedling (%), seeds die (%), vigor index, fresh weight of seedling (g), dry weight of seedling (g). The results showed soaking treatment of various types of cryoprotectant significant effect on the observation parameters the rate of germination (day), normal seedling (%), vigor index, fresh weight of seedling (g) and dry weight of seedling (g). Treatment of soaking cryoprotectant significant effect on the observation parameters abnormal seedling (%) and vigor index. Interaction type and duration of soaking cryoprotectant significant effect observation parameters on the rate of germination (day) and vigor index. Keywords: cryoprotectant, soaking time, cryopreservation, roselle seed

Produksi Biji Bawang Merah Samosir Aksesi Simanindo Terhadap Konsentrasi GA3 dan Lama Perendaman di Dataran Tinggi Samosir Berson Berson; Mariati Mariati; Rosita Sipayung
Jurnal Agroekoteknologi Vol 3, No 3 (2015)
Publisher : Universitas Sumatera Utara

The aim of the research was to identify the effect of GA3 concentration and soaking period on the seed yield of shallot. Research was conducted at Hatoguan Village, Palipi Subdistrict, Samosir from February up to July 2014, carried out by using randomizes block design with two factors, replicated three times. The first factor was GA3 concentrations (50 ppm; 100 ppm; 150 ppm; 200 ppm; and 250 ppm) and the second was soaking period (30; 60; and 90 minutes). Parameters observed were the number of plant producing flowers per plot, the number of umbel per plot, seed weight per umbel, and seed weight per plot. The results showed that among all parameters observed, only the number of plants producing flowers per plot and seed weight per umbel were affected by GA3 concentration. The highest number of plants producing flowers and seed weight per umbel were produced by G4 (200 ppm GA3) i.e 10,780 plants (43,12 %) and 0,202 g respectively. Meanwhile, only seed weight per umbel was significantly affected by soaking period. The correlation between soaking period and seed weight per unbel showed positive linear regression.Key word: GA3 consentration, soaking period, shallot

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