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Respons Pertumbuhan Beberapa Varietas Sorgum (Sorghum bicolor L.) Pada Tanah Salin Dengan Pemberian Giberelin Zulfah Siregar; Mbue Kata Bangun; Revandy I.M Damanik
Jurnal Agroekoteknologi Vol 4, No 3 (2016)
Publisher : Universitas Sumatera Utara

ABSTRAK Penelitian ini bertujuan untuk mengetahui respons pertumbuhan beberapa varietas sorgum pada tanah salin dengan pemberian giberelin. Penelitian ini dilaksanakan di Lahan Percobaan Fakultas Pertanian Universitas Sumatera Utara, Medan pada bulan Juli sampai Oktober 2015, menggunakan rancangan acak kelompok dengan dua faktor perlakuan yaitu varietas (Kawali, Numbu, Super 2) dan konsentrasi giberelin (0, 100 dan 200 ppm). Parameter yang diamati adalah tinggi tanaman, diameter batang, jumlah daun, umur berbunga, kehijauan daun dan berat malai per sampel. Hasil penelitian ini menunjukan bahwa perlakuan varietas berbeda nyata terhadap tinggi tanaman, jumlah daun, umur berbunga, bobot malai per sampel. Perlakuan pemberian giberelin dan interaksinya tidak berbeda nyata.

Potensi Serangan Hama Kepik Hijau Nezara viridula L. (Hemiptera: Pentatomidae) dan Hama Kepik Coklat Riptortus linearis L. (Hemiptera: Alydidae) pada Tanaman Kedelai di Rumah Kassa dewi sartika; Lahmuddin Lubis; Marheni Sembiring
Jurnal Agroekoteknologi Vol 4, No 4 (2016)
Publisher : Universitas Sumatera Utara

Penelitian ini bertujuan untuk mengetahui potensi serangan hama kepik hijau (N. viridula) dan kepik coklat (R. linearis) pada tanaman kacang kedelai di rumah kassa. Penelitian ini dilaksanakan di Rumah Kasa Fakultas Pertanian Universitas Sumatera Utara pada bulan September sampai dengan Desember 2014. Penelitian ini menggunakan Rancangan Acak Kelompok nonfaktorial yang terdiri dari 3 perlakuan yaitu Kontrol, R. linearis dan N. viridula dengan 9 ulangan. Hasil penelitian menunjukkan bahwa intensitas serangan hama R. linearis lebih tinggi dibanding N. viridula. Hal ini terlihat dengan persentase serangan tertinggi terdapat pada perlakuan R. linearis yaitu 81,36%. Jumlah populasi telur dan nimfa tertinggi terdapat pada perlakuan R. linearis dengan rata-rata 16,00 butir dan 8,11 ekor. Tingkat produksi pada perlakuan R. linearis sebesar 13,92 g. Sedangkan pada perlakuan N. viridula dan kontrol, persentase serangannya sebesar 51,66% dan 0,00%. Jumlah populasi telur dan nimfa pada perlakuan N. viridula dan kontrol sebesar 10,22 ; 0,00 butir dan 5,00 ; 0,00 ekor. Tingkat produksi pada perlakuan kontrol dan N. viridula sebesar 26,41 g dan 16,73 g.

The evaluation of land suitability to arabica coffee (Coffea arabica) and strawberry (Fragaria vesca Linn.) in Pematang Sidamanik Subdistrict of Simalungun District. Usmul Safti Kartika; posma marbun
Jurnal Agroekoteknologi Vol 4, No 3 (2016)
Publisher : Universitas Sumatera Utara

The objective of this research is to evaluatethe land suitability arabica coffee (Coffea arabica) and strawberry (Fragaria vescaLinn.) in Pematang Sidamanik Subdistrict of Simalungun District.The methode of this research is the survay method. from the results of the overlay from the map of soil types, map of topography, and map of height place, retrieved 10 (ten) units of land use map. The result of the research showed that actual and potential land suitability class for arabica coffee and strawberry at SPL 1, 2, 3, 4, 5, 6, 8, 9 is Not Suitable (N) with restrain factor is rooting condition (rc). The actual land suitability class for arabica coffeeat SPL 7 is Not Suitable (N) with restrain factor is erosion hazard (eh). SPL 10 is Marginally Suitable (S3) with restrain factors water available, nutrient retention, and erosion hazard (wa, nr, eh), while the potential land suitability class at SPL 7 is Marginally Suitable (S3) with restraint factor water available and erosion hazard (wa, eh). SPL 10 is Marginally Suitable (S3) with restrain factor water available (wa).The actual land suitability class for strawberry at SPL 7 is Not Suitable (N) with restrain factor is erosion hazard (eh). SPL 10 is Marginally Suitable (S3) with restrain factor nutrient retention and erosion hazard (nr, eh), while the potential land suitability class for strawberry at SPL 7 is Marginally Suitable (S3) with restrain factor erosion hazard (eh). SPL 10 is Fairly Appropriate (S2) with restrain nutrient retention (nr, eh). Keywords : Land suitability, arabica coffee, strawberry

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

Uji Efektivitas Metarhizium anisopliae Metch. dan Beauveria bassiana Bals. terhadap Ulat Grayak (Spodoptera litura F.) pada Tanaman Kedelai (Glicyne max L.) di Rumah Kassa Sri Sartika L. Tobing; Marheni Marheni; Hasanudin Hasanuddin
Jurnal Agroekoteknologi Vol 4, No 1 (2016)
Publisher : Universitas Sumatera Utara

The objective of the research was to study the effectivity of Metarhizium anisopliae Metch. and Beauveria bassiana Bals. against oriental leafworm moth (Spodoptera litura F.) in soybean (Glicyne max L.) was conducted at the screen house Faculty of Agriculture, University of Sumatra Utara, from November 2013 until April 2014, using randomized block design non factorial with 7 treatments control, M. anisopliae 104/ml, 106/ml and 108/ml, B. bassiana 104/ml, 106/ml and 108/ml with three replications. The results showed that the highest percentage of mortality in treatment for M. anisopliae 108/ml with 100%. The highest percentage of larvae become pupae in control with 100%. The highest percentage intensity of larvae on leaves B. bassiana 104/ml and for B. bassiana with 19.67%. The quickest death time was on the second day after application in treatment M. anisopliae.Keywords: Spodoptera litura, Metarhizium anisopliae, Beauveria bassiana, Glicyne maxThe objective of the research was to study the effectivity of Metarhizium anisopliae Metch. and Beauveria bassiana Bals. against oriental leafworm moth (Spodoptera litura F.) in soybean (Glicyne max L.) was conducted at the screen house Faculty of Agriculture, University of Sumatra Utara, from November 2013 until April 2014, using randomized block design non factorial with 7 treatments control, M. anisopliae 104/ml, 106/ml and 108/ml, B. bassiana 104/ml, 106/ml and 108/ml with three replications. The results showed that the highest percentage of mortality in treatment for M. anisopliae 108/ml with 100%. The highest percentage of larvae become pupae in control with 100%. The highest percentage intensity of larvae on leaves B. bassiana 104/ml and for B. bassiana with 19.67%. The quickest death time was on the second day after application in treatment M. anisopliae.Keywords: Spodoptera litura, Metarhizium anisopliae, Beauveria bassiana, Glicyne max

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

Pengaruh Pemberian N 2,4-D Terhadap Pertumbuhan dan Metabolisme Kalus Kedelai Pada Kondisi Hipoksida Secara Invitro Elita Kumianjani A B; Revandi iskandar Damanik; Luthfi A. M. Siregar
Jurnal Agroekoteknologi Vol 4, No 1 (2016)
Publisher : Universitas Sumatera Utara

Soybean demand continues to increase as the number of people , but the production has not be enable to meet the needs of national soybean. One effort to increase production is to indentificat soybean acreage of inundation. The aims of the research was to determine about Identification callus of soybean toward inundation by in vitro. This research was carried out in The Tissue Culture Laboratory, Agriculture’s Faculty Of North Sumatera University from August to March 2015. Completely Randomized Design with two factors was used, first factor was auxin 2,4-D concentration consist of three leevels : 0 ppm; 2 ppm; 4 ppm. The second factor was Inundation and without Inundation. The parameters measured were are visualization of callus, percentage of growth callus, percentage of weight callus , the amount of chlorophyll a and b, and concentration of protein. The results showed that 2,4-D concentration and Inundation give significant effect on visualization of callus, percentage of growth callus, percentage of weight callus , the amount of chlorophyll a and b, and concentration of protein , but it have no significantly effect on the formation of chlorophyll a in the phase of inundation and interactions between as given significantly effect on all parameters.Keywords : 2,4-D, Hipoksida, In vitroSoybean demand continues to increase as the number of people , but the production has not be enable to meet the needs of national soybean. One effort to increase production is to indentificat soybean acreage of inundation. The aims of the research was to determine about Identification callus of soybean toward inundation by in vitro. This research was carried out in The Tissue Culture Laboratory, Agriculture’s Faculty Of North Sumatera University from August to March 2015. Completely Randomized Design with two factors was used, first factor was auxin 2,4-D concentration consist of three leevels : 0 ppm; 2 ppm; 4 ppm. The second factor was Inundation and without Inundation. The parameters measured were are visualization of callus, percentage of growth callus, percentage of weight callus , the amount of chlorophyll a and b, and concentration of protein. The results showed that 2,4-D concentration and Inundation give significant effect on visualization of callus, percentage of growth callus, percentage of weight callus , the amount of chlorophyll a and b, and concentration of protein , but it have no significantly effect on the formation of chlorophyll a in the phase of inundation and interactions between as given significantly effect on all parameters.Keywords : 2,4-D, Hipoksida, In vitro

Respons Pertumbuhan Dan Produksi Bawang Merah (Allium ascalonicum L.) Terhadap Jenis Mulsa Dan Pemberian Urine Sapi Dedy Perdata Sembiring; Rosita Sipayung; Emmy Harso Kardhinata
Jurnal Agroekoteknologi Vol 4, No 1 (2016)
Publisher : Universitas Sumatera Utara

The aim of this research was to evaluate the influence of types of mulch and dose of cow’s urine on the growth and production of shallot. The research was conducted at the experimental field of Agricultural Faculty, North Sumatra University which about ± 25 metres above sea level, from April to July 2015. The researh was arranged by randomized block design with two factors, i.e: types of mulch (no mulch, silver black plastic, black plastic, and rice straw) and dose of cow’s urine (0, 500, 600, 700 ml/plot). Parameter observed were plant height, number of leaves per clump, number of tillers per clump, diameter of bulbs per sample, bulb fresh weight per sample, bulb dry weight per sample, bulb fresh weight per plot, and bulb dry weight per plot. The results showed that the type of mulch significantly affect to number of tillers per clump parameter at 3 weeks after planting. The aplication of cow’s urine did not give significant effect to all parameters observed.Keywords : cow’s urine, shallot, types of mulchThe aim of this research was to evaluate the influence of types of mulch and dose of cow’s urine on the growth and production of shallot. The research was conducted at the experimental field of Agricultural Faculty, North Sumatra University which about ± 25 metres above sea level, from April to July 2015. The researh was arranged by randomized block design with two factors, i.e: types of mulch (no mulch, silver black plastic, black plastic, and rice straw) and dose of cow’s urine (0, 500, 600, 700 ml/plot). Parameter observed were plant height, number of leaves per clump, number of tillers per clump, diameter of bulbs per sample, bulb fresh weight per sample, bulb dry weight per sample, bulb fresh weight per plot, and bulb dry weight per plot. The results showed that the type of mulch significantly affect to number of tillers per clump parameter at 3 weeks after planting. The aplication of cow’s urine did not give significant effect to all parameters observed.Keywords : cow’s urine, shallot, types of mulch

Pemberian Bahan Amandemen untuk Perbaikan Retensi Hara Tanaman Jeruk Manis (Citrus sinensis L.) di Desa Talimbaru Kecamatan Barusjahe Kabupaten Karo Rina Indriany P Pakpahan; Sarifuddin Sarifuddin; Supriadi Supriadi
Jurnal Agroekoteknologi Vol 4, No 1 (2016)
Publisher : Universitas Sumatera Utara

This study aimed to determine the diverification of the amendment to the base saturation and production of sweet orange. This research was conducted in plantation citrus Talimbaru Village Barusjahe District Regency of Karo with plant age of ± five years and soil analysis at the Laboratory of PT. Socfin Indonesia and Laboratory Research and Technology Faculty of Agriculture, University of North Sumatra. This experiment using a Nonfaktorial Randomized Block Design (RAK) which consists of 5 treatments, namely B0 = Without Amendment (control), BP1 = Cow Manure (8,07 kg/plant), BP2 = Chicken Manure (8.15 kg/plant) , BA1 = Powder Ash (8,11 kg/plant), and BA2 = Shells Palm Oil (8.15 kg/plant) three replications. This research was conducted for 4 months. The parameters were measured soil pH, organic-C, P-available, N-total, CEC, K-exchange, Ca-exchange, Mg-exchange, Na-exchange, base saturation, and production citrus. The results showed that application of amendment materials palm shells and cow manure can improve base saturation so that citrus fruits production increased. Cow manure amendment supply bases Ca and Mg while shells palm oil supply base K in the soil. All amendment increased pH and soil organic C.Keywords : Cow Manure, Chicken Manure, Powder Ash, Shells Palm Oil, Nutrient Retention, CitrusThis study aimed to determine the diverification of the amendment to the base saturation and production of sweet orange. This research was conducted in plantation citrus Talimbaru Village Barusjahe District Regency of Karo with plant age of ± five years and soil analysis at the Laboratory of PT. Socfin Indonesia and Laboratory Research and Technology Faculty of Agriculture, University of North Sumatra. This experiment using a Nonfaktorial Randomized Block Design (RAK) which consists of 5 treatments, namely B0 = Without Amendment (control), BP1 = Cow Manure (8,07 kg/plant), BP2 = Chicken Manure (8.15 kg/plant) , BA1 = Powder Ash (8,11 kg/plant), and BA2 = Shells Palm Oil (8.15 kg/plant) three replications. This research was conducted for 4 months. The parameters were measured soil pH, organic-C, P-available, N-total, CEC, K-exchange, Ca-exchange, Mg-exchange, Na-exchange, base saturation, and production citrus. The results showed that application of amendment materials palm shells and cow manure can improve base saturation so that citrus fruits production increased. Cow manure amendment supply bases Ca and Mg while shells palm oil supply base K in the soil. All amendment increased pH and soil organic C.Keywords : Cow Manure, Chicken Manure, Powder Ash, Shells Palm Oil, Nutrient Retention, Citrus

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