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All Journal Jurnal Farmasi Udayana Agrikultura AGROEKOTEKNOLOGI JURNAL ILMU PERTANIAN Jurnal Penelitian Pertanian Terapan Agrotekma: Jurnal Agroteknologi dan Ilmu Pertanian Jurnal Agro Estate Journal La Lifesci PERTANIAN TROPIK Agrotech Journal Agroista: Jurnal Agroteknologi Agroland: Jurnal Ilmu-ilmu Pertanian

Mariani sembiring

Program Studi Agroteknologi, Fakultas Pertanian, USU, Padang Bulan, Medan- 20155, Indonesia.

Author-ID : 315614

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Environmental Science Immunology & microbiology Medicine & Pharmacology

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Evaluasi Kesesuaian Lahan dengan Metode Limit untuk Tanaman Kopi Arabika (Coffea Arabica) dan Kopi Robusta (Coffea robusta Lindl.) di Kecamatan Silima Pungga-pungga Kabupaten Dairi Cynthia Simanjuntak; Posma Marbun; Mariani Sembiring
Jurnal Agroekoteknologi Vol 3, No 2 (2015)
Publisher : Universitas Sumatera Utara

Penelitian ini bertujuan untuk mengevaluasi kesesuaian lahan untuk tanaman Kopi Arabika danKopi Robusta Di Kecamatan Silima Pungga-pungga Kabupaten Dairi. Diperoleh 18 (delapan belas)SPL (satuan peta lahan) yang ditentukan berdasarkan peta jenis tanah, peta kemiringan lereng danpeta ketinggian tempat yang dihasilkan dari peta topografi dengan skala 1 : 50.000, kemudiandilakukan overlay. Penilaian kelas kesesuaian lahan berdasarkan kriteria Staf Pusat PenelitianTanah Bogor Tahun 1993 dan metode evaluasi lahan adalah metode limit berdasarkan Djaenuddin,2003. Hasil penelitian menunjukkan bahwa kelas kesesuaian lahan potensial Kecamatan SilimaPungga-pungga untuk tanaman kopi arabika adalah tidak sesuai (N) dan untuk tanaman kopirobusta, kelas kesesuaian lahan potensial adalah agak sesuai (S2).Kata kunci : kesesuaian lahan, kopi arabika, kopi robusta

Karakteristik Beberapa Sifat Fisik, Kimia, dan Biologi Tanah Pada Sistem Pertanian Organik Rizky Dharmawan Margolang, Rizky Dharmawan Margolang,; Jamila Jamilah; Mariani Sembiring
Jurnal Agroekoteknologi Vol 3, No 2 (2015)
Publisher : Universitas Sumatera Utara

The purpose of the study to determine the characteristis of some of the physical, chemical, and biological properties of soil in organic farming systems. The study was held about 6 month from November 2013 to April 2014 in Bioenvironment Education Center of Organic Farming Bahorok in Timbang Lawan village, Bahorok, at Langkat district for observe the characteristic of some physical, chemical, and biological characteristic of soil in organic farming system. This research was conducted with survey method by evaluation the soil character in the area of farming base on the time of application of the organic farming, so it taken 3 samples which are the organic farming system beginning from year 2005; the organic farming system beginning from year 2010; and farming system which not applicate the system of organic farming yet as the comparation and was conducted about 3 sample points. The result of this research showed that the application of organic farming can fix the physical and biological characteristic, but not chemistry charactreristic yet. The charactreristic of physical of the soil that can be fixed by the application of organic farming were changed soil color become darken, decreased bulk density of soil, increased the total soil pore space, and increased soil permeability from criteria a bit slow to medium. Whether for the infiltration of soil can not be increased yet with the organic farming application. The application of this organic farming system can not fix the chemical characteristic of soil as pH of soil, C-organic of soil, N-total of soil, and P-available still have the same criteria with conventional farming application, but for parameter K-exchange can increase this parameter from low to medium. The organic farming application can fix the biology characteristic by increase the soil respiration, number of soil microorganism and earthworms population.Keywords : organic farming, conventional farming, soil characteristic

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

Dampak Ketebalan Abu Vulkanik Erupsi Gunung Sinabung Terhadap Sifat Biologi Tanah Di Kecamatan Naman Teran Kabupaten Karo Beatrix I. L. J. Sinaga; Mariani Sembiring; Alida Lubis
Jurnal Agroekoteknologi Vol 3, No 3 (2015)
Publisher : Universitas Sumatera Utara

Penelitian ini dilakukan untuk mengetahui dampak ketebalan abu vulkanik pada erupsi Gunung Sinabung terhadap sifat biologi tanah di Kecamatan Naman Teran, Kabupaten Karo.Penelitian dilaksanakan di Laboratorium Biologi Tanah Fakultas Pertanian, Universitas Sumatera Utara, Medan dan di Balai Pengkajian Tanaman Pertanian (BPTP), Medan pada bulan Mei-September 2014.Penelitian ini dilakukan dengan melakukan pengamatan berdasarkan dengan ketebalan abu yang ada di lapangan dengan pengambilan sampel tanah diambil di daerah kecamatan Naman Teran, Kabupaten Karo dan dilakukan sebanyak 2 kali yaitu pada bulan April 2014 dan Juli 2014 dengan pengambilan sampel berdasarkan ketebalan abu yang tidak terkena A0 (tanpa), A1 (≤2cm), A2 (2-8 cm) dan A3 (>8cm).Adapun parameter yang diamati adalah pH tanah dan pengukuran aktivitas mikroorganisme tanah (respirasi).Hasil penelitian menunjukkan bahwa pH tanah dan pengukuran aktivitas mikroorganisme tanah (respirasi) bahwa semakin tebal abu yang menutupi permukaan tanah maka nilai pH dan respirasinya akan menurun.Kata kunci : abu vulkanik, ketebalan abu, sifat biologi tanah.

Eksplorasi dan Potensi Jamur Pelarut Fosfat pada Andisol Terkena Dampak Erupsi Gunung Sinabung dengan Beberapa Ketebalan Abu di Kecamatan Naman Teran Kabupaten Karo Viky Fatmala; Mariani Sembiring; Jamilah Jamilah
Jurnal Agroekoteknologi Vol 3, No 3 (2015)
Publisher : Universitas Sumatera Utara

This research was conducted to determine the type of Phosphate Solubilizing Fungi (PSF) as a result from isolated Andisol in Naman Teran district Karo sub district that affected by the eruption of mount Sinabung with some ash thickness around 0 cm (not affected), >0 cm - <2 cm (thin), >2 cm - 8 cm (moderate) and >8 cm (thick), and to determine its ability to dissolve phosphate on solid media. Isolation and potential test on solid media using media Pikovskaya with phosphate source Ca3(PO4)2. Evaluates JPF potential qualitatively by measuring the holozone diameter using index values dissolution. The results were obtained 4 PSF genus found in Andisol’s soil affected by the eruption of mount Sinabung: Aspergillus sp., Trichoderma sp., Penicillium sp.1 and Penicillium sp. 2. PSF were able to survive up to a thickness of Asharound >8cm is Aspergillus sp. Based on the test results the potential of solid media Penicillium sp.2 has the best ability to dissolve phosphate.Keyword: phosphate, volcanic ash, phospate solubilizing fungi

Tingkat Bahaya Erosi (TBE) Tanah Andisol pada beberapa Tipe Penggunaan Lahan dengan Metode USLE dan SIG di Desa Kutaraja Kecamatan Namanteran Kabupaten Karo Amos Simanungkalit; Zulkifli Nasution; Mariani Sembiring
Jurnal Agroekoteknologi Vol 3, No 4 (2015)
Publisher : Universitas Sumatera Utara

Tingkat Bahaya Erosi (TBE) Tanah Andisol Pada Beberapa Tipe Penggunaan Lahan dengan Menggunakan Metode USLE di Desa Kutarakyat Kecamatan Namanteran Kabupaten Karo, di bimbing oleh Prof. Ir. Zulkifli Naustion, M.Sc, PhD sebagai ketua komisi pembimbing dan Mariani Sembiring, SP., MP sebagai anggota komisi pembimbing. Desa Kutarakyat Kecamtan Namanteran Kabupaten Karo merupakan daerah desa yang langsung bertepatan dengan Kabupaten Langkat dimana daerah ini masih didominasi oleh daerah hutan. Untuk mengetahui tingkat erosi tanah Desa Kutarakyat dilakukan suatu penelitian pada Juni-September 2011. Penelitian ini menggunakan metode survey dan dilanjutkan perhitungan laju erosi tanah metode USLE (Universal Soil Loss Equation). Hasil penelitian menunjukkan Nilai Erosi Aktual tertinggi berada pada lahan tanaman tahunan yaitu sebesar 6,941 ton/ha/tahun dengan kemiringan lereng 15-30%, sedangkan yang terendah pada lahan hutan sebesar 0,218 ton/ha/tahun dengan kemiringan lereng 8-15%. Dengan nilai Erosi yang Ditoleransikan tertinggi pada lahan tanaman tahunan yaitu sebesar 21,563 ton/ha/tahun dengan kemiringan lereng 8-15%, sedangkan yang terendah pada lahan tanaman semusim yaitu 8,9 ton/ha/tahun dengan kemiringan lereng 0-3%. Dengan Tingkat Bahaya Erosi Aktual yang terbesar pada lahan tanaman tahunan yaitu 0.357 dengan kemiringan lereng 15-30% dengan kriteria sangat ringan, sedangkan yang terendah pada lahan hutan yaitu 0.011 dengan kemiringan lereng 8-15% dengan kriteria sangat ringan.Kata Kunci: Erosi Tanah USLE, Kemiringan, Vegetasi

Perubahan Bentuk P Oleh Mikroba Pelarut Fosfat dan Bahan Organik Terhadap P-tersedia dan Produksi Kentang (Solanum tuberosum L.) pada Tanah Andisol Terdampak Erupsi Gunung Sinabung Marta Ritonga; Bintang Sitorus; Mariani Sembiring
Jurnal Agroekoteknologi Vol 4, No 1 (2016)
Publisher : Universitas Sumatera Utara

Andisol was soil with high phosphate retension (>85 %) so that Phosphate not available to plants. Phosphate (P) was important nutrient that used in photosynthesis process, roots growth, flower, fruit and seed forming. The object of this research is to know the effect of phosphate solubilizing microbe (MPF) application, some organic matter sources and both of interaction to changes of phosphate form to phosphate availability and potatos (Solanum tuberosum L.) production at Andisol soil impacted Sinabung Mountain eruption. This research was conducted in Kuta Rakyat Village, Naman Teran Subdistrict, Karo Regency on February until July 2015. The research used factorial Random Device Group Methode (RDG) consists of two treatments and two replications. The first factor is phosphate solubilizing microbe with four treatments: control, phosphate solubilizing bacterial (30 ml), phosphate solubilizing fungi (30 ml), phosphate solubilizing bacterial and fungi (15 ml + 15 ml). The second factor is organic matter with five treatments: control, cow manure (100 g/plant), chicken manure (100 g/ plant), straw (100 g/ plant), Tithonia diversifolia (100 g/ plant). The result showed that phosphate solubilizing fungi and chicken manure application, increased P availability and productions of potato (Solanum tuberosum L.) plants.Key Words : Andisol, Phosphate solubilizing microbe, organic matter, availability phosphate,production of potatos (Solanum tuberosum L.)Andisol was soil with high phosphate retension (>85 %) so that Phosphate not available to plants. Phosphate (P) was important nutrient that used in photosynthesis process, roots growth, flower, fruit and seed forming. The object of this research is to know the effect of phosphate solubilizing microbe (MPF) application, some organic matter sources and both of interaction to changes of phosphate form to phosphate availability and potatos (Solanum tuberosum L.) production at Andisol soil impacted Sinabung Mountain eruption. This research was conducted in Kuta Rakyat Village, Naman Teran Subdistrict, Karo Regency on February until July 2015. The research used factorial Random Device Group Methode (RDG) consists of two treatments and two replications. The first factor is phosphate solubilizing microbe with four treatments: control, phosphate solubilizing bacterial (30 ml), phosphate solubilizing fungi (30 ml), phosphate solubilizing bacterial and fungi (15 ml + 15 ml). The second factor is organic matter with five treatments: control, cow manure (100 g/plant), chicken manure (100 g/ plant), straw (100 g/ plant), Tithonia diversifolia (100 g/ plant). The result showed that phosphate solubilizing fungi and chicken manure application, increased P availability and productions of potato (Solanum tuberosum L.) plants.Key Words : Andisol, Phosphate solubilizing microbe, organic matter, availability phosphate,production of potatos (Solanum tuberosum L.)

Aplikasi Mikroba Pelarut Fosfat dan Bahan Organik untuk Meningkatkan Serapan P dan Pertumbuhan Kentang Pada Andisol Terdampak Erupsi Gunung Sinabung Susianti Susianti Marbun; Mariani Sembiring; Bintang Sitorus
Jurnal Agroekoteknologi Vol 4, No 1 (2016)
Publisher : Universitas Sumatera Utara

Field study aimed to know the effect of P solubilizing microbe and organic matter application to P uptake and Potatos growth at Andisol impacted Sinabung Mountain eruption. The research was conducted in Kutarayat, Namanteran, regency of Karo. The research applied randomized block design factorial with two treatment factor and three replications. Microbe factor were control, P solubilizing bacterial (30 mL), P solubilizing fungi (30 mL), P solubilizing bacterial and fungi (15 mL + 15 mL) and organic matter factor were control, Cow feces organic matter (100 g/plant), chicken feces organic matter (100 g/plant), shaw organic matter (100 g/plant), Tithonia diversifolia (100 g/ plant). Parameter measured were soil pH, available-P, shoot dry weight and plant P uptake. The result showed that phosphate solubilizing fungi and cow feces or chicken feces organic matter aplication could increase P uptake and Potatos growth at Andisol impacted by Sinabung eruption.Keywords : Andisol, phosphate solubilizing microbe, organic matter, P uptake, potatos growthField study aimed to know the effect of P solubilizing microbe and organic matter application to P uptake and Potatos growth at Andisol impacted Sinabung Mountain eruption. The research was conducted in Kutarayat, Namanteran, regency of Karo. The research applied randomized block design factorial with two treatment factor and three replications. Microbe factor were control, P solubilizing bacterial (30 mL), P solubilizing fungi (30 mL), P solubilizing bacterial and fungi (15 mL + 15 mL) and organic matter factor were control, Cow feces organic matter (100 g/plant), chicken feces organic matter (100 g/plant), shaw organic matter (100 g/plant), Tithonia diversifolia (100 g/ plant). Parameter measured were soil pH, available-P, shoot dry weight and plant P uptake. The result showed that phosphate solubilizing fungi and cow feces or chicken feces organic matter aplication could increase P uptake and Potatos growth at Andisol impacted by Sinabung eruption.Keywords : Andisol, phosphate solubilizing microbe, organic matter, P uptake, potatos growth

Aplikasi Bahan Organik pada Piringan Kelapa Sawit untuk Meningkatkan Populasi Cacing Tanah dan Ketersediaan Hara P dan K Nur Ulina Warnisyah S Sebayang; T. Sabrina; Mariani Sembiring
Jurnal Agroekoteknologi Vol 4, No 1 (2016)
Publisher : Universitas Sumatera Utara

The earthworm contribute to soil fertility and environment quality but they need a suitable habitat to survive on the land including the presence of organic material as a food source. The present study was conducted in Sei Pancur Plantation, Tanjung Morawa, in March - September 2015. The design used in study was a factorial randomized block design consists two factors. The first was various types of organic materials : without organic matter (B0) ; litter (B1) ; empty fruit bunches oil palm (B2) ; litter+T.harzianum (B3) ; and empty fruit bunches oil palm+T.harzianum (B4). The second were method of application : evenly spread a layer (C1) ; stacked around turn rod (C2) ; and stacked on the edge of weeded circle (C3). The result found that application of organic materials significantly increased P-available, K-exchangeable, and earthworm. Method of applications significantly increased P-available and earthworm populations. The relationship among interaction of both significantly increased phosphate available and earthworm populations. Application on the edge of weeded circle was the best way to reduce P-available and earthworm populations. Empty fruit bunches oil palm+T.harzianum reduced K-exchangeable. Empty fruit bunches oil palm increased earthworm populations and litter+T.harzianum increased P-available.Key words : earthworm, method of applicaton, weeded circle, organic materialsThe earthworm contribute to soil fertility and environment quality but they need a suitable habitat to survive on the land including the presence of organic material as a food source. The present study was conducted in Sei Pancur Plantation, Tanjung Morawa, in March - September 2015. The design used in study was a factorial randomized block design consists two factors. The first was various types of organic materials : without organic matter (B0) ; litter (B1) ; empty fruit bunches oil palm (B2) ; litter+T.harzianum (B3) ; and empty fruit bunches oil palm+T.harzianum (B4). The second were method of application : evenly spread a layer (C1) ; stacked around turn rod (C2) ; and stacked on the edge of weeded circle (C3). The result found that application of organic materials significantly increased P-available, K-exchangeable, and earthworm. Method of applications significantly increased P-available and earthworm populations. The relationship among interaction of both significantly increased phosphate available and earthworm populations. Application on the edge of weeded circle was the best way to reduce P-available and earthworm populations. Empty fruit bunches oil palm+T.harzianum reduced K-exchangeable. Empty fruit bunches oil palm increased earthworm populations and litter+T.harzianum increased P-available.Key words : earthworm, method of applicaton, weeded circle, organic materials

Perubahan Beberapa Sifat Kimia Tanah, Serapan P dan Pertumbuhan Tanaman Jagung Pada Tanah Inceptisol Kwala Bekala Akibat Pemberian Pupuk Kandang Ayam dan Beberapa Sumber P Eko Andreas Sihite; M.M.B. Damanik; Mariani Sembiring
Jurnal Agroekoteknologi Vol 4, No 3 (2016)
Publisher : Universitas Sumatera Utara

Tanah Inceptisol memiliki kandungan bahan organik yang rendah dan pH yang rendah.Kandungan bahan organik rendah dengan ratio C/N tergolong rendah dan kandungan P potensial rendah.Penelitian ini dilaksanakan di Rumah Kasa Fakultas Pertanian Universitas Sumatera Utara, Medan.Pada bulan Agustus tahun 2015 sampai dengan selesai.Rancangan yang digunakan adalah rancangan acak kelompok (RAK) faktorial terdiri dari 2 faktor. Faktor I adalah pupuk kandang ayam dengan 4 taraf yaitu: tanpa aplikasi pupuk kandang ayam, 40 g/polibag, 80 g/polibag, dan 120 g/polibag. Faktor II adalah beberapa sumber Pyang terdiri dari: tanpa aplikasi pupuk P, pupuk SP-36, dan pupuk TSP. Hasil penelitian menunjukkan pemberian pupuk kandang ayam dapat merubah beberapa sifat kimia tanah, serapan P dan produksi tanaman jagung pada Tanah Inceptisol Kwala Bekala. Pemberian beberapa sumber P dapat merubah beberapa sifat kimia tanah, serapan P dan pertumbuhan tanaman jagung pada Tanah Inceptisol Kwala Bekala. Interaksi antara pupuk kandang ayam dan beberapa sumber P dapat merubah beberapa sifat kimia tanah, serapan P dan produksi tanaman jagung pada Tanah Inceptisol Kwala Bekala.

Co-Authors Abdul Rauf Abdul Rauf Ade Ine Imansari Agustini, Fenny Alfredo Sitorus Alida Lubis Amos Simanungkalit Andi Andi Armando Septian Simbolon Armando Septian Simbolon Aslan Pasaribu Asmarlaili S. Hanafiah asmarlaili sahar hanafiah Beatrix I. L. J. Sinaga Benny Hidayat Benny Hidayat Bintang Sitorus Bintang Sitorus Budi Ananda Pratama Cynthia Simanjuntak Damanik, Revandy Damanik, Revandy I.M Danu Syahputra Lubis Deni Elfiati Deni Elfiati Edi Sigit Sutarta Edi Sigit Sutarta Eko Andreas Sihite Fauzi Fauzi Githa Noviana Guntoro Guntoro . Hardy Guchi Hendrik Dharmansyah Imam Ramadhan Intan Safitri Jamila Jamilah Jamilah Jamilah Jul Bahori Panggabean Julpan Lynneus Sitohang Lady Sarah M.M.B. Damanik Manullang, Yedija Mardiana Wahyuni Mardiana Wahyuni@gmail.com Marta Ritonga Meilissa Damayanti Lumban Gaol Muhammad Maulana Ghifari Muhammad Nazarul Yanis Muhammad Yusuf Dibisono Mukhlis Mukhlis Muklis Muklis Ni Komang Sri Lumbung Artha Wardani Nofriyanto Pakolo Nur Ulina Warnisyah S Sebayang, Nur Ulina Warnisyah S Posma Marbun Putra, P. A. S. Putu Oka Samirana rahmayanti rahmayanti Raja Forman Barasa Razali Ricky Elmando Saragih Ridwandi Ridwandi Rino P. C. Purba Rizky Dharmawan Margolang, Rizky Dharmawan Margolang, Ropikoh Hasibuan Sakiah Sakiah Sakiah Sakiah Sarifuddin Sarifuddin Sitohang, Julpan Lynneus Sitorus Sitorus Supriadi Supriadi Susianti Susianti Marbun T Sabrina T Sabrina T. Sabrina Tengku Sabrina Tengku Sabrina Tioner Purba Tosuko Utomo Triani, Agus vijay sitanggang Viky Fatmala Wahyuni, Mardiana Yopie Priest Aulia Sinaga yudi sudarno sihombing Zoel Hani Hasibuan Zulkifli Nasution Zulkifli Nasution

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