Deni Elfiati
Program Studi Pasca Sarjana Fakultas Pertanian USU, Medan 20155

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APLIKASI ASAM HUMIK DAN PUPUK NPK MAJEMUK TERHADAP PERTUMBUHAN TANAMAN SUREN (TOONA SURENI MERR) PADA TANAH MARGINAL Marpaung, Ronald Pandapotan; Elfiati, Deni; D, Delvian
Peronema Forestry Science Journal Vol 1, No 1 (2012): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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Abstract

The Marginal Land in Indonesia still in very large amount. Meanwhile, the accelerate to rehabilitate the land still very slow. The low of pH, C-Organik, N-Total, P and K-exchangeable become the parameter of marginal land condition. Therefore carried out research which combine acid humic and NPK fertilizer which applied to marginal land and seen its influence to growth of seed of suren. Research has been  done in green house at Faculty Of Agriculture of USU on March-May 2012 using completely randomized factorial design of two factors that is concentration of  humic acid ( 0%, 2.5% and 5%) and dose prular NPK fertilizer ( 0 gr; 1 gr; 2 gr; 3 gr and 4 gr per crop). The parameters observed were height of the plant, diameter of stem, dry wight, wide total of leaf and ratio of root crown. The results of research indicate that the concentration of humic acid do not have an effect on the reality to all of the parameters except to parameter of ratio of root crown. But dosage of  NPK fertilizer have significantly effect to all of the parameters. The combination of the concentration of humic acid and NPK fertilizer do not have an effect on the reality to all parameter. All of the dose of NPK fertilizer  besides control have a different significantly to the growth of the plant. Thereby, using of NPK fertilizer is good to growth of plant on marginal land media. Keyword : marginal land, humic acid, NPK fertilizer, seed of suren.
EFISIENSI SERAPAN NITROGEN TIGA VARIETAS KEDELAI DENGAN PEMUPUKAN NITROGEN DAN PENAMBAHAN RHIZOBIUM PADA TANAH DENGAN STATUS HARA N RENDAH PHYSIOLOGY EFFICIECY OF NITROGEN ABSORBTION WITH THREE SOYBEAN VARIETY OF UREA AND APPLICATIONS RHIZOBIUM IN SOIL WI Hamidah, Makruf; Hanum, Hamidah; Elfiati, Deni
Pertanian Tropik Vol 2, No 2 (2015)
Publisher : Pasca Sarjana FP USU

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The use of chemical nitrogen fertilizer tends to be high on soils with low nitrogen nutrient status, it can affect the balance of the global N cycle, contamination of ground water and the increasing N2O (nitric monoxide is one of the greenhouse gases). The objective of this research to compare the effect of nitrogen fertilization and application of Rhizobium on nitrogen uptake efficiency, growth and yield of three varieties of soybeans In Soil With Nutritrional Status Low Nitrogen. The research was conducted at the practice field Agricultural Extention Collage Medan, Deli Serdang North Sumatra Province in August-December, 2014. The method used is split-slip plot design with the main plot Rhizobium application and without Rhizobium, subplot is the varieties used are Burangrang, Tanggamus and Wilis. Sub-sub plot is the standard of N fertilization, that is: control, urea 50 kg / ha, 100 kg / ha and 150 kg / ha. Variable observations include: nitrogen absorption, plant dry weight, nodule and production. The results showed that the application of Rhizobium on the variety Wilis provide a significant response to the increased absorption of nitrogen, whereas the the varieties Burangrang and Tanggamus not give a significant response to increased nitrogen absorption. Urea fertilizer dose of 150 kg / ha on the use of Rhizobium inoculant tends to give a negative reaction to the Physiology Efficiecy Of Nitrogen Absorbtion (PEN), nodule, and weight of 100 grains. Physiology Efficiecy Of Nitrogen Absorbtion (PEN) of three varieties tested were not affected by the level of nitrogen fertilization and the addition of Rhizobium.Keywords: Soybean, Efficiency Nitrogen, Rhizobium
EFEKTIVITAS PEMBERIAN BEBERAPA JENIS BAHAN ORGANIK TANDAN KOSONG KELAPA SAWIT DAN MIKORIZA PADA TANAMAN KARET DI TANAH CEKAMAN KEKERINGAN Lumbantoruan, Santa Maria; Sahar, Asmarlaily; Elfiati, Deni; sitohang, Chadra
Pertanian Tropik Vol 2, No 3 (2015)
Publisher : Pasca Sarjana FP USU

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Abstract

Penelitian ini bertujuan untuk mengetahui respon pemberian Bahan Organik TKKS dan Mikoriza terhadap pertumbuhan stum karet berpayung dua ditanah cekaman kekeringan pada kadar 60 %. Penelitian ini dilaksanakan di rumah kasa Fakultas Pertanian USU (± 25 m dpl) pada bulan November 2014 – Mei 2015 menggunakan Rancangan Acak Lengkap Faktorial (RAL) dengan dua faktor. Fakktor pertama yaitu dosis Bahan Organik Tandan Kosong Kelapa Sawit (TKKS) dengan 4 taraf yaitu 0 g/polybag, 300 g/polybag, 600 g/polybag, 900 g/polybag; dan faktor kedua yaitu jenis Mikoriza dengan 4 taraf yaitu tanpa mikoriza, Glomus, Acaulospora, Glomus+Acaulospora. Hasil penelitian menunjukkan bahawa aplikasi bahan organik TKKS memiliki pengaruh yang nyata terhadap tinggi tanaman dan cenderung nyata pada diameter batang. Dimana taraf terbaiknya diperoleh pada dosis 600 g/polybag. Pemberian Mikoriza tidak berpengaruh nyata namun dapat meningkatakan rata-rata tinggi tanaman dan diameter batang. Jenis mikoriza yang terbaik diperoleh pada jenis mikoriza yang digabung yaitu Glomus + Acaulospora. interaksi antara bahan organik TKKS dan Mikoriza tidak berpengaruh nyata namun dapat meningkatkan rata-rata tinggi tanaman dan diameter batang. Taraf kombinasi yang terbaik terdapat pada Bahan Organik TKKS 300 g/polybag dan Mikoriza Glomus + Acaulospora.Kata kunci: Bahan Organik TKKS, Mikoriza, Cekaman Kekeringan, dan Karet
PENINGKATAN KETERSEDIAAN FOSFAT DAN PRODUKSI TANAMAN KENTANG (Solanum tuberosum L) DENGAN MENGGUNAKAN TALAROMYCES PINOPHILUS INDIGENOUS DAN PUPUK SP36 PADA ANDISOL TERDAMPAK ERUPSI GUNUNG SINABUNG Sembiring, Mariani; Elfiati, Deni; Sutarta, Edi Sigit; Sabrina, T.
Pertanian Tropik Vol 2, No 3 (2015)
Publisher : Pasca Sarjana FP USU

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Penelitian ini bertujuan untuk mengetahui pengaruh Jamur pelarut Fosfat, Dosis Pupuk P dan kombinasi jamur Pelarut Fosfat dan Dosis Pupuk P terhadap Pertumbuhan, P-tersedia dan produksi tanaman kentang (Solanum tuberosum L) pada Andisol terdampak erupsi Sinabung. Parameter yang diamati: Berat kering tanaman diukur pada akhir masa vegetatif, Produksi tanaman, Serapan P tanaman dan Analisa P tersedia tanah,dengan metode Bray II diukur pada akhir masa vegetatif. Hasil penelitian menunjukkan bahwa Kombinasi perlakuan Jamur pelarut fosfat (T. pinophilus )dan SP36 berpengaruh terhadap peningkatan P-tersedia pada perlakuan J1P2 yaitu sebesar 71.65% bila dibanding dengan kontrol walaupun secara statistik tidak berpengaruh nyata. Pada parameter serapan P tanaman aplikasi perlakuan T. pinophilus dan SP36 berpengaruh nyata dalam peningkatan serapan P tanaman, perlakuan yang terbaik adalah T3P2 tetapi menurun dengan peningkatan dosis SP36 (P3=13g). Berat kering tanaman perlakuan T3P2 yang terbaik dan menurun dengan meningkatnya dosis SP36 (13 g). Peningkatan produksi tanaman kentang yang tertinggi yaitu J2P1 dengan produksi sebesar 1017.5g sedangkan tanaman kontrol 610 g.Peningkatan produksi tanaman kentang yaitu sebesar 66.8% lebih tinggi bila dibanding dengan kontrol. Aplikasi T. pinophilus sebanyak 20 mL dan 6.5g SP36 memiliki produksi yang terbaik, produksi menurun dengan peningkatan dosis T. pinophilus dan pupuk SP36.Kata kunci : Andisol, Dosis Pupuk P, tanaman Kentang, Talaromyces pinophilus
EVALUASI KESESUAIAN LAHAN UNTUK TANAMAN LAHAN SAWAH DI KECAMATAN HAMPARAN PERAK KABUPATEN DELI Nora, Silvia; Rauf, Abdul; Elfiati, Deni
Pertanian Tropik Vol 2, No 3 (2015)
Publisher : Pasca Sarjana FP USU

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Abstract

Kecamatan Hamparan Perak Kabupaten Deli Serdang memiliki luas lahan pertanian ± 11.046 ha atau 48, 9 % dari luas Kecamatan ini, dimana seluas 7.048 ha adalah lahan sawah yang potensial namun belum dimanfaatkan secara optimal. Berdasarkan UU No 41 tahun 2009 bahwa perencanaan pengembangan lahan pertanian pangan berkelanjutan harus berdasarkan pada kriteria kesesuaian lahan yang dapa dilakukan dengan dukungan penelitian. Penelitian ini bertujuan untuk mengevaluasi karakteristik tingkat kesesuaian lahan sawah dan lahan kering di Kecamatan Hamparan Perak Kabupaten Deli Serdang, untuk menganalisis usaha–usaha perbaikan yang perlu dilakukan dalam meningkatkan produktivitas tanaman dan untuk membuat peta kesesuaian lahan aktual dan kesesuaian lahan potensial tanaman padi sawah dan beberapa tanaman lahan kering di Kecamatan Hamparan Perak Kabupaten Deli Serdang. Metode analisisnya adalah dengan metode membandingkan (matching) menurut FAO. pemilihan satuan unit lahan berdasarkan peta tanah yang terdiri dari 12 titik bor dan 6 lobang profil. Hasil penelitian menunjukkan bahwa tingkat kesesuaian lahan untuk tanaman padi sawah (Oryza sativa) adalah cukup sesuai (S2) seluas 14.093, 883 ha dan sesuai marginal (S3) seluas 17.347,141 ha. Untuk tanaman jagung (Zea mays) termasuk cukup sesuai (S2) seluas 19.391, 019 ha dan sesuai marginal (S3) seluas 12.050,005 ha. Untuk tanaman kedelai (Glicine max) termasuk sesuai marginal (S3) seluas 31.441,024 ha. Untuk tanaman ubi kayu (Manihot utilissima) termasuk kelas sesuai marginal (S3) seluas 31.441,024 ha. Untuk tanaman ubi jalar (Ipomea batatas) termasuk kelas sesuai marginal (S3) seluas 31.441,024 ha. Untuk tanaman sawo (Achras zapota) termasuk kelas cukup sesuai (S2) seluas 17.660,583 ha dan kelas sesuai marginal (S3) seluas 13.780,441 ha. Untuk tanaman mangga (Mangifera indica) termasuk kelas sesuai marginal (S3) seluas 31.441,024 ha. Untuk tanaman sukun (Astocarpus astilis) termasuk kelas cukup sesuai (S2) seluas 17.660,58 ha dan kelas sesuai marginal (S3) seluas 13.780,44 ha.Kata Kunci : Evaluasi kesesuaian lahan, tanaman lahan sawah, tanaman lahan kering, Kecamatan Hamparan Perak.
PERAN KOMPOS TANDAN KOSONG KELAPA SAWIT DAN PUPUK ANORGANIK DALAM MENINGKATKAN SERAPAN HARA N, P, K DAN PERTUMBUHAN TANAMAN KENAF (Hibiscus cannabinus L.) Batubara, Redina Marlina; Elfiati, Deni; Akoeb, Erwin Nyak
Pertanian Tropik Vol 3, No 1 (2016)
Publisher : Pasca Sarjana FP USU

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Abstract

ABSTRAK Penelitian ini bertujuan untuk mengetahui peran kompos tandan kosong kelapa sawit (TKKS) dan pupuk anorganik dalam meningkatkan serapan hara N, P, K dan Pertumbuhan tanaman kenaf. Penelitian di lakukan di Desa Martebing Kecamatan Dolok Masihul Kabupaten Serdang Bedagai Provinsi Sumatera Utara pada bulan April-Agustus 2015 menggunakan Rancangan Faktorial dalam Rancangan Acak Kelompok dengan tiga ulangan. Faktor pertama adalah dosis kompos TKKS (O) dengan empat taraf, yaitu 0, 10, 20, dan 30 ton ha-1 dan faktor kedua adalah dosis pupuk anorganik (A) dengan empat taraf, yaitu 0, 200, 400, 600 kg ha-1. Hasil penelitian menunjukkan bahwa interaksi kedua perlakuan berpengaruh nyata pada peubah pengamatan tinggi tanaman dan diameter batang namun berpengaruh tidak nyata terhadap biomassa. Pemberian kompos TKKS dan pupuk anorganik dan juga peningkatan dosisnya meningkatkan serapan N, P dan K daun. Serapan unsur hara N, P, dan K daun tertinggi berturut-turut adalah 1,65; 0,064; dan 0,31 g/tanaman pada perlakuan kompos TKKS 30 ton ha-1 dan pupuk anorganik 600 kg ha-1. Kata kunci: kenaf, kompos TKKS, pupuk NPK, kombinasi pupuk organik dan anorganik, efisiensi serapan hara NPK.
EVALUASI KESESUAIAN LAHAN PERTANIAN PADA AREAL PENGGUNAAN LAIN UNTUK TANAMAN KOPI ARABIKA(Coffea arabica L.) DI KECAMATAN SALAK KABUPATEN PAK-PAK BHARAT Hartono, Budi; Rauf, Abdul; Elfiati, Deni; Harahap, Fitra Syawal; Sidabuke, Simon Haholongan
Jurnal Solum Vol 15, No 2 (2018): JURNAL SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jsolum.15.2.66-74.2018

Abstract

Based on the Decree of the Minister of Forestry Number. 44 of 2005 on Appointment of Forest Areas in North Sumatra Province. The total area of forest in Pakpak Bharat Regency based on the decree is 120,711 ha (88.60% of the total of Pakpak Bharat Regency), with details 1) Natural Forest Reserve 4.36%, 2) Limited Production Forest 41.95%, 3) Protection Forest 34.61%, 4) Forest Production 7.68%. Subsequently, the Decree was revised with Decree No. Menhut. 579 / Menhut-II / 2014 in accordance with the proposed revision of forest area by Pakpak Bharat government. With the decree, the forest area released into Other Use Areas (APL) is only a small portion of the proposed area so that APL Land Use (Area of Other Use) in Salak Sub-district needs to be supported with information on land suitability of course very potential land to be utilized in activities cultivation of agriculture, with the hope that productivity can improve the welfare of local people who mostly work as farmers. The objectives of this study were to evaluate the characteristics of the APL land suitability level, to analyze improvement efforts to increase productivity, and to map actual land suitability and potential land suitability for coffee crops on APL land in Salak Subdistrict. The research method used survey method. Unit unit of land based on land map, slope slope map, altitude map, land cover map, and consists of 8 land units and 18 sampling points. Research data were analyzed using matching method. Research results Limiting factors and improvement efforts of plant commodities Coffee Plant (Coffea arabica L.) Rooting factor factor (rc) and nutrient retention (nr). Improvement efforts that can be done is making drainage and calcification CaCo3Key words : Land suitability, Coffee, District Salak
UTILIZATION OF WATER HYACINTH PLANTS (EICHORNIA CRASSIPES), JASMINE WATER (ECHINODORUS PALEAFOLIUS) AND APU WOOD (PISTIASTRATIOTES) ON DECREASING LEVEL OF LIQUID WASTE POISONOUS OF TOFU Fadhillah, Wiznie; Purba, Edison; Elfiati, Deni
Journal of Community Research and Service Vol 1, No 2 (2017)
Publisher : Center of Community Service of State University of Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24111/jcrs.v1i2.9333

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Abstract The aim of this research was to improve the quality of liquid waste water by looked at the role of test plants (warter hyacinth, water jasmine and apu wood)by phytoremediation process in reducing pollutant level. This research was conducted at Rumah Kaca Faculty of Agriculture University of Sumatera Utara Medan from July 2016 to April 2017.This research was used factorial randomized block design with two factors. The first factor was tofu waste with three levels; L0 (no waste) as control , L1(25%) and L2 (50%). The second factor was plant species with four levels were T0 (no plant as control), T1 (water hyacinth), T2 (jasmine water) and T3 (apu wood). The parameters observed were BOD (mg / L), COD (mg / L), TSS (mg / L), NH3N (mg / L), pH, waste colours, odor waste and dry weight of plans (grams).The results showed that the three test plants could be used for phytoremediation process, tofu waste, 25% waste concentration as the best apu wood in reducing the pollutant level of tofu waste.Keywords: tofu liquid waste, aquatic plants, phytoremediation, contaminants
EKSPLORASI MIKORIZA PADA LAHAN BEKAS TAMBANG EMAS MASYARAKAT DI MANDAILING NATAL Sihombing, Sahat A.; Delvian, Delvian; Elfiati, Deni
Peronema Forestry Science Journal Vol 5, No 3 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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The mycorrhizal is affected by biotic and abiotic factor. The purpose of this research is to explore the mycorrhizal on the soil of former gold mine community in Mandailing Natal so that we know the types of native mycorrhizal of the area. The data got from this research used to helps land reclamation efforts by the application of mycorrhizal on land mine. This activity will improve the condition of the damaged environment or increase productivity of the land. This research use soil separating method to obtain spores and root coloring method to find out root colonization. Result from this research is 2 genus spores are found they are genus Acaulospora 5 types of spores / 10 g soil and genus Glomus 11 types of spores / 10 g soil. The percentage of mycorrhizal colonization on former gold mine community in  Mandailing Natal is revolve between 8,12% - 28,55% .Key words: Mycorrhizal, genus Acaulospora and genus Glomus, former gold mine land community
STUDI SISTEM INFORMASI GEOGRAFIS (SIG) BAGI PERENCANAAN PENGHIJAUAN DI KELURAHAN SATRIA KOTA TEBING TINGG Syahputra, Andi; Zaitunah, Anita; Elfiati, Deni
Peronema Forestry Science Journal Vol 5, No 1 (2016): Peronema Forestry Science Journal
Publisher : Program studi Kehutanan USU

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There are some environmental problems in the development of urban areas including air, water and soil pollution. The high growth level of population which are followed by the establishment of industrial zones and settlements areas have cause less of vegetation areas. The purpose of this study was to identify areas which is potential to be developed as afforestation areas using geographic information systems by applications using SPOT 5 satellite imagey. Afforestation planning of bare land is in the form of afforestation in settlements areaswith total area of ??7.14 hectares. Afforestation planning in the green belt is afforestation along roads and the river. There is 169.52 kilometers of road length to be afforested. Suitable plant species could be Pterocarpus indicus, Filicium decipiens, Polyalthia longifolia, Mimusops elengi, Switenia mahagoni, Casuarina equisetifolia, and Oreodoxa regia. Along the river bank of 17.27 kilometers length is recommended to be afforested with bamboo plants. Keywords: Reboisation Planning, SPOT 5 imagery, Geographic Information Systems (GIS)