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RESPONS PERKECAMBAHAN BENIH PINANG (ARECA CATECHU L.) TERHADAP BERBAGAI SKARIFIKASI DAN KONSENTRASI ASAM GIBERELAT (GA3) Mistian, Dini; Meiriani, Meiriani; Purba, Edison
AGROEKOTEKNOLOGI Vol 1, No 1 (2012)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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ABSTRACT Response the seed germination of betel nut (Areca catechu L.) on some of scarification and gibberelic acid (GA3) concentration. The generative muliplication of betel nut need time to germinate about 8-12 weeks. One of causes is the ossify husk of seed which inhibit water into the seed. Therefore, a research had been conducted at Rumah Kassa, Faculty of Agriculture, USU (± 25 m asl) from March until May 2012 using factorial randomized block design with 2 (two) factors, i.e. scarification (without scarification, base scarification, middle scarification, and tip scarification) and gibberelic acid (GA3) concentration (0, 100, 200, and 300 mg/l). The parameters observed were speed of germination, seedling length, root length root number and leaf number. The result showed that scarification significantly increased on parameter speed of germination up to 64% and leaf number up to 167%. The gibberelic acid (GA3) concentration and interaction between scarification and gibberelic acid (GA3) concentration did not significant on all parameters.   Keywords: Betel Nut, Germination, Scarification, Gibberelic Acid (GA3)   ABSTRAK Respons perkecambahan benih pinang (Areca catechu L.) terhadap berbagai skarifikasi dan konsentrasi asam giberelat (GA3). Perbanyakan pinang secara generatif memerlukan waktu untuk proses perkecambahannya yaitu 8-12 minggu, salah satu penyebabnya adalah adanya dormansi yang disebabkan oleh kulit biji yang keras yang menghambat masuknya air ke dalam biji. Untuk itu suatu penelitian telah dilakukan di Rumah Kasa Fakultas Pertanian USU  (± 25 m dpl) pada Maret-Mei 2012 menggunakan rancangan acak kelompok faktorial 2 faktor yaitu skarifikasi benih (tanpa skarifikasi, skarifikasi pangkal, skarifikasi perut, dan skarifikasi ujung) dan perendaman dengan asam giberelat (GA3) (0, 100, 200, dan 300 mg/l). Peubah amatan yang diamati adalah laju perkecambahan, panjang bibit, panjang akar, jumlah akar dan jumlah daun. Hasil penelitian menunjukkan perlakuan skarifikasi benih nyata meningkatkan laju perkecambahan benih hingga 64% dan jumlah daun hingga 167% dibandingkan tanpa perlakuan skarifikasi. Konsentrasi asam giberelat (GA3) dan interaksi antara skarifikasi dan konsentrasi asam giberelat (GA3) berpengaruh tidak nyata terhadap semua peubah amatan. Kata kunci: Pinang, perkecambahan, skarifikasi, Asam Giberelat (GA3)
RESPONS DOSIS BIOTIP Eleusine indica RESISTEN-GLIFOSAT TERHADAP GLIFOSAT, PARAKUAT, DAN GLUFOSINAT Lubis, Lia Andayani; Purba, Edison; Sipayung, Rosita
AGROEKOTEKNOLOGI Vol 1, No 1 (2012)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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ABSTRACT Dose response of Eleusine indica biotype Glyphosate-resistance to Glyphosate, Paraquat, and Glufosinate. Goosegrass (Eleusine indica) is one of weeds commonly found in oil palm plantation of which is getting more difficult to control with glyphosate during the last few years in Adolina Estate, PTPN IV.  This study aims to determine the dose response of the putative resistant population to three herbicides, glyphosate, paraquat, and ammonium glufosinat along with susceptible population which was never exposed to herbicide previously. The rates of glyphosate applied were 0, 120, 240, 360, 480, 600, 720 g a.i. ha-1; paraquat at 0, 50, 100, 150, 200, 250, 300 g a.i. ha-1 and ammonium glufosinat at 0, 110, 220, 330, 440, 550, 660 g a.i. ha-1.  The treatments were arranged in randomised block design (RBD) and each treatment was made in three replicates. The results showed that the putative glyphosate- resistant population collected from Adolina Estate was multiple resistant to glyphosate, and paraquat.  On the other side, the ammonium glufosinate was satisfactorily control the population.  The level of resistance to glyphosate and paraquat were seven and 56 fold of the susceptible population respectively. Keywords: Glyphosate, Paraquat, Glufosinate, herbicide, Eleusine indica, resistance ABSTRAK Respons dosis  biotip Eleusine indica resisten-glifosat terhadap glifosat, parakuat, dan glufosinat. Gulma Eleusine indica merupakan salah satu gulma yang biasa ditemukan di perkebunan kelapa sawit yang selama beberapa tahun terakhir telah diketahui semakin sulit untuk mengendalikannya dengan glifosat di Kebun Adolina, PTPN IV. Penelitian ini bertujuan untuk mengetahui respons dosis populasi yang diduga resisten terhadap tiga herbisida, glifosat, parakuat, dan ammonium glufosinat menggunakan populasi resistensi yang pernah disemprot herbisida sebelumnya. Taraf dosis glifosat yang digunakan, yaitu 0, 120, 240, 360, 480, 600, 720 g b.a./ha; parakuat pada 0, 50, 100, 150, 200, 250, 300 g b.a./ha dan ammonium glufosinat pada 0, 110, 220, 330, 440, 550, 660 g b.a./ha. Perlakuan disusun dalam rancangan acak kelompok (RAK) dan setiap perlakuan dibuat dalam tiga ulangan. Hasil penelitian menunjukkan bahwa populasi                     resisten-glifosat yang berasal dari Kebun Adolina terjadi resistensi ganda pada glifosat dan parakuat. Di sisi lain, ammonium glufosinat secara memuaskan dapat mengontrol populasi. Tingkat ketahanan terhadap glifosat dan parakuat masing-masing tujuh dan 56 kali lipat dari populasi resisten. Kata kunci: Glifosat,  Parakuat, Glufosinat,  herbisida, Eleusine indica, resistensi
UJI EFIKASI HERBISIDA GLIFOSAT TERHADAP PERTUMBUHAN DAN PRODUKSI BEBERAPA VARIETAS JAGUNG PRODUK REKAYASA GENETIKA Caesar, Tony; Purba, Edison; Rahmawati, Nini
AGROEKOTEKNOLOGI Vol 1, No 1 (2012)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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ABSTRACT The study on the efficacy of glyphosate on the growth and yield of genetically modified corn varieties. The study aims to determine the efficacy of glyphosate on the growth and yield two varieties of genetically modified corn. The study was carried out at “Balai Benih Induk”, Tanjung Selamat, Medan from March to June 2012. Four treatments namely stacked genetically modified corn “X” x genetically modified corn “Y” (sprayed with glyphosate), genetically modified corn “X”                         (no glyphosate application, manual weeding), genetically modified corn “Y” (sprayed with glyphosate), hybrid DK979 (no glyphosate application, manual weeding). The result showed that glyphosate did not affect genetically modified corn. Keywords: glyphosate, varieties, corn, tolerant ABSTRAK Uji efikasi herbisida glifosat terhadap pertumbuhan dan produksi beberapa varietas jagung produk rekayasa genetika. Penelitian ini bertujuan untuk mengetahui efikasi herbisida glifosat terhadap pertumbuhan dan produksi dua varietas jagung produk rekayasa genetika. Penelitian dilaksanakan di Balai Benih Induk Tanaman Palawija, Tanjung Selamat, Medan pada bulan Maret sampai dengan Juni 2012. Empat perlakuan yaitu Jagung stacked PRG ”X” x PRG ”Y” (disemprot dengan glifosat), Jagung PRG ”X” (tanpa glifosat, disiang manual), Jagung PRG ”Y” (disemprot dengan glifosat), Jagung hibrida DK979 (tanpa glifosat, disiang manual). Hasil penelitian menunjukkan bahwa herbisida glifosat tidak berpengaruh nyata terhadap keracunan jagung produk rekayasa genetika. Kata kunci: glifosat, varietas, jagung, toleran herbisida.
RESPON PERTUMBUHAN DAN PRODUKSI BAWANG MERAH (Allium ascalonicum L.) TERHADAP PEMBERIAN PUPUK NPK DAN KOMPOS KULIT BUAH KOPI Simanjuntak, Afriadi; Lahay, Ratna Rosanty; Purba, Edison
AGROEKOTEKNOLOGI Vol 1, No 3 (2013)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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Application of inorganic fertilizers continuously without the use of organic fertilizers has caused the degradation of agricultural land. The negative impacts caused by land degradation is a decline in agricultural yield, such as the yield of shallot. A solution to solve this problem is to combination inorganic with organic fertilizers. Coffee pulp compost is one of the example of organic fertilizers. So, the research was conductedto investigate combination of NPK fertilizer and coffee pulp compost on growth and production of shallot which is use Randomized Block Design withtwofactors. Firstfactor is NPK fertilizer (0, 150,300, 450kg/ha) and thesecondfactor is coffee pulp compost (0,5, 10, 15 ton/ha).The results showed that the treatment of NPK fertilizer significantly affect the plant height 3,5,6 weeks after planting and production per plot.NPK at 150 kg/ha can increase production by 15.32% compared with no fertilization.Coffee pulp compost treatment significantly affect the production per plot.Compost at 10 ton/ha can increase production by 10.26% compared to without giving compost. The interaction between the NPK fertilizer and coffee pulp compost non significantly affect to all parameters.
PERTUMBUHAN DAN PRODUKSI JAGUNG MANIS (Zea mays sacaratha Sturt. L) PADA BERBAGAI JARAK TANAM DAN WAKTU OLAH TANAH Silaban, Evy Thyrida; Purba, Edison; Ginting, Jasmani
AGROEKOTEKNOLOGI Vol 1, No 3 (2013)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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The aim of the research was to evaluate the growth and production of sweet corn  (Zea mays sacharata Sturt. L) planted at various distance and land preparation (soil tillage prior to  planting). The treatments were arranged in split plot design with three replication. The study consists of two factors, as main plot was time of soil tillage prior to planting (one and seven days) whereas sub plot was planting distance consist of four different spaces : 70cm x 10cm, 70cm x 20cm, 70cm x 30cm dan 70cm x 40cm. Result showed that the plant spacing consists of  70cm x 40cm performs significant effect on number of leaves, stem diameter, cob diameter, and production per plant, but not significant effect on flowering time and number of cobs per plot. The interaction between time of planting and planting space had no significant effect on plant height, number of leaves, stem diameter, days to flowering, cob diameter, number of cobs per plot, weight of cobs per plot and production per plant. Keywords: sweet corn, plant spacing and tillage time
PERTUMBUHAN DAN PRODUKSI JAGUNG MANIS (Zea mays sacaratha Sturt. L) PADA BERBAGAI JARAK TANAM DAN WAKTU OLAH TANAH Silaban, Evy Thyrida; Purba, Edison; Ginting, Jasmani
AGROEKOTEKNOLOGI Vol 1, No 4 (2013)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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Abstract

The aim of the research was to evaluate the growth and production of sweet corn (Zea mayssacharata Sturt. L) planted at various distance and land preparation (soil tillage prior to planting).The treatments were arranged in split plot design with three replication. The study consists of twofactors, as main plot was time of soil tillage prior to planting (one and seven days) whereas sub plotwas planting distance consist of four different spaces : 70cm x 10cm, 70cm x 20cm,70cm x 30cm dan 70cm x 40cm. Result showed that the plant spacing consists of 70cm x40cm performs significant effect on number of leaves, stem diameter, cob diameter, and productionper plant, but not significant effect on flowering time and number of cobs per plot. The interactionbetween time of planting and planting space had no significant effect on plant height, number ofleaves, stem diameter, days to flowering, cob diameter, number of cobs per plot, weight of cobs perplot and production per plant.Keywords: sweet corn, plant spacing and tillage time
PENGARUH WAKTU PENYIANGAN TERHADAP PERTUMBUHAN DAN PRODUKSI BEBERAPA VARIETAS SORGUM (Sorgum bicolor (L.) Moench) Tarigan, Dewi Hiasinta; T. Irmansyah, T. Irmansyah; Purba, Edison
AGROEKOTEKNOLOGI Vol 2, No 1 (2013)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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ABSTRACTThis study aims to know the effect of weeding time on the growth and production of some varietiesof sorghum in Pasar 1 street Tanjung Sari, Medan, with ± 25 meters altitude above the sea level inJuly – November 2012. The design use Factorial Separated Design Frame with 2 aspects. The firstaspect as a main frame is variety (Sangkur, Kawali, Numbu) and the second factor as subordinateframe is weeding time (clean weeding during research, weeded after 7 days planting, weeded after 14days planting, weeded after 21 days planting, weeded after 28 days planting, without weedingprocess). The parameters measured were plant height, number of leaves, flowering, canopy wetweight, production per sample, production per plot, the production per ha, the weight of 1000 seeds.From the research, varieties significantly affect on plant height (4-8 weeks after planting), number ofleaves (6 and 8 weeks after planting), flowering, canopy wet weight, production per sample,production per plot, production per hectare, weight 1000 seeds.Weeding time significantly affect onplant height (4-8 weeks after planting) the number of leaves (2-8 weeks after planting), the weight ofthe wet canopy, production per sample, production per plot, production per hectare, the weight of1000 seeds. Interaction significantly affect on the number of leaves 6 weeks after planting.Keywords : sorghum, varieties, and weeding time
PERTUMBUHAN DAN HASIL TIGA KLON UBI JALAR PADA JARAK TANAM YANG BERBEDA Sasvita, Wikka; Chairani Hanum, Chairani Hanum; Purba, Edison
AGROEKOTEKNOLOGI Vol 2, No 1 (2013)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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Abstract

Potensi ubi jalar di Kota Binjai cukup tinggi dapat dilihat dari segi ekonomi maupun sosial budaya.Pemilihan klon ubi merupakan alternatif peningkatan produksi dan mutu ubi jalar di Kota Binjai.Produksi yang tinggi dari ubi jalar tergantung pada bagaimana meningkatan potensi ubi jalar danmetode kultur teknik. Jarak tanam dan variasi klon adalah salah satu alternatif untuk meningkatakanproduksi yang tinggi. Penelitian dilakukan untuk membandingkan pertumbuhan dan hasil tiga klonubi jalar pada jarak tanam yang berbeda di Kelurahan Cengkeh Turi, Binjai (+ 25 mdpl) dari bulanMei - Agustus 2012 menggunakan rancangan acak faktorial 2 faktor. Faktor pertama yaitu klon yangterdiri dari Daya, A82 dan Jago, faktor kedua adalah jarak tanam terdiri dari: 5x100; 15x100;25x100; 35x100 dan 45x100 cm. Hasil penelitian menunjukkan bahwa klon Daya menghasilkanbobot umbi terbesar pada jarak tanam 45 x 100 cm, klon A82 pada jarak tanam 35 x 100 cm,sedangkan klon Jago pada jarak tanam 25 x 100 cm. Jumlah umbi terbesar terdapat pada klon Dayadengan perlakuan jarak tanam 25 x 100 cm. Bobot rata-rata satu umbi per tanaman, bobot rata-ratasatu umbi per plot, panjang umbi per sampel dan lilit umbi per sampel tertinggi terdapat pada jaraktanam 45 x 100 cm.Kata kunci : ubi jalar, klon, jarak tanam.
PERTUMBUHAN DAN PRODUKSI JAGUNG ( Zea may s L. ) PADA BERBAGAI METODE PENGENDALIAN GULMA Simanjuntak, Norman Swasco; Purba, Edison; Ginting, Jonatan
AGROEKOTEKNOLOGI Vol 2, No 3 (2014)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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The presence of weeds in the cultivation of maize PRG C7 tolerant to glyphosate herbicide face theproblem of decline in maize production . The spraying of glyphosate herbicide can suppress weeds ,and is expected to increase the growth and production of maize in cultivation . Research conductedat Balai Benih Induk Tanaman Palawija crop field , Tanjung Selamat , Kecamatan sunggal,, NorthSumatra on March-July 2013, using a randomized block design (RBD ) with four types of nonfactorialmethod of weed control treatments and 4 replications . The parameters measured wereplant height , number of leaves , leaf length , leaf width , stem diameter , high productive cob,number of productive cob , cob length , cob diameter , cob weight klobot , klobot ear length , earweight without klobot , number of seeds per cob shelled , shelledgrain weight per ear, dry weight of 100 seeds,water content. The results showed that theeffect of glyphosate herbicide spraying is not real stem diameter and dry weight of 100 seeds butsignificant effect on other parameters.________________________________________________________________________________Keywords: product of genetic engineering, tolerant of glyphosate , glyphosate , weed , corn hybrids.
KOMPOSISI DAN KEPADATAN SEED BANK GULMA PADA BERBAGAI KEDALAMAN TANAH PERTANAMAN PALAWIJA BALAI BENIH INDUK TANJUNG SELAMAT Siahaan, Marshal P.; Purba, Edison; Irmansyah, Teuku
AGROEKOTEKNOLOGI Vol 2, No 3 (2014)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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Weed seeds in the soil per hectare can reach millions of amount and consists of many differentspecies. The depth of the weed seeds can be used as indicator of competitive level between crop andweeds. The research aims to determine the composition and density of seed bank at various level ofsoil depths at “ Balai Benih Palawija ” Tanjung Selamat North Sumatra. Soil Samples warecollected from four soil depths, namely: 0-5 cm, 5-10 cm, 10-15 cm,15-20 cm using metal pipe withdiameter of 3 cm. The parameters measured were the number of weeds that grow by the depth ofsoil, weed composition (%) per depth of soil and weeds growing time per depth of soil.From resultshowed that the highest density of weed seed bank is found at the depth of 0 – 5 cm. Weedcomposition dominated ( 68.9 % ) by broadleaf weeds. There are differences in the composition anddensity of the real seed bank at different depths in the soil in the field area of Balai Benih IndukTanjung Selamat. Composition and density of weed tends to be lower in deeper soil depths.Keywords: seed bank, depth of soil and crops planting area