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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

Respon GA3 Terhadap Induksi Tunas Mikro Tanaman Karet (Hevea brasiliensis (Muell). Arg) Larosa Harahap; Luthfi Aziz Mahmud Siregar; Diana Sofia Hanafiah
Jurnal Agroekoteknologi Vol 4, No 1 (2016)
Publisher : Universitas Sumatera Utara

The aim of the research was to know effect of GA3 to rubber plant in micro shoot formation. The research was conducted at the rubber plant microcutting labortory PT Perkebunan Nusantara III Kebun Gunung Pamela, Tebing Tinggi, North Sumatera, Indonesia from April 2015 to Juli 2015. The Completely randomize design was used with two factors,i.e.:the addition of GA3 (GA3 0 mg/l; GA3 0.5 mg/l; GA3 1 mg/l; GA3 1.5 mg/l) and the immersion of nodes (GA3 0 mg/l; GA3 5 mg/l; GA3 10 mg/l; GA3 15 mg/l) with seven replications. The result showed that addition of 0.5 mg/l GA3 of significantly affected the percent of shoot emergence but no significantly different age of shoot emergence and immersion of nodes of 0 mg/l significantly affected the percent of shoot emergence but no significantly different age of shoot emergence and the interraction that addition of 0.5 mg/l GA3 and immersion of nodes significant affected the percent of shoot emergence on age of shoot emergence but no significantly different.Keywords : rubber, micro shoot, addition of GA3, immersion of nodesThe aim of the research was to know effect of GA3 to rubber plant in micro shoot formation. The research was conducted at the rubber plant microcutting labortory PT Perkebunan Nusantara III Kebun Gunung Pamela, Tebing Tinggi, North Sumatera, Indonesia from April 2015 to Juli 2015. The Completely randomize design was used with two factors,i.e.:the addition of GA3 (GA3 0 mg/l; GA3 0.5 mg/l; GA3 1 mg/l; GA3 1.5 mg/l) and the immersion of nodes (GA3 0 mg/l; GA3 5 mg/l; GA3 10 mg/l; GA3 15 mg/l) with seven replications. The result showed that addition of 0.5 mg/l GA3 of significantly affected the percent of shoot emergence but no significantly different age of shoot emergence and immersion of nodes of 0 mg/l significantly affected the percent of shoot emergence but no significantly different age of shoot emergence and the interraction that addition of 0.5 mg/l GA3 and immersion of nodes significant affected the percent of shoot emergence on age of shoot emergence but no significantly different.Keywords : rubber, micro shoot, addition of GA3, immersion of nodes

Pengaruh Jenis Eksplan dan Komposisi Media terhadap Pembentukan Tunas Tanaman Karet (Hevea brasiliensis Muell. Arg.) Secara In Vitro Emmy Rosita; Luthfi Aziz Mahmud Siregar; Emmy Harso Kardhinata
Jurnal Agroekoteknologi Vol 4, No 1 (2016)
Publisher : Universitas Sumatera Utara

The aim of this research is to evaluate the influence of medium composition and types of explant on shoot formation of rubber tree (H. brasiliensis Muell. Arg.). The research was carried out in the In Vitro Culture Laboratory, PT. Perkebunan Nusantara III Kebun Gunung Pamela, Tebing Tinggi, Sumatera Utara, Indonesia. The research was conducted from March to July 2015. The research was arranged in completely randomized design with two factors, i.e.: types of explant and the medium with combination of growth regulatorsand fifteen replications. The results showed that interaction types of explant and medium with combination of growth regulators gave significant effect on percent of shoots.Key words: rubber, multiplication, explants, medium in vitroThe aim of this research is to evaluate the influence of medium composition and types of explant on shoot formation of rubber tree (H. brasiliensis Muell. Arg.). The research was carried out in the In Vitro Culture Laboratory, PT. Perkebunan Nusantara III Kebun Gunung Pamela, Tebing Tinggi, Sumatera Utara, Indonesia. The research was conducted from March to July 2015. The research was arranged in completely randomized design with two factors, i.e.: types of explant and the medium with combination of growth regulatorsand fifteen replications. The results showed that interaction types of explant and medium with combination of growth regulators gave significant effect on percent of shoots.Key words: rubber, multiplication, explants, medium in vitro

Respons Pertumbuhan dan Produksi Bawang Merah (Allium ascalonicum L.) Terhadap Pemberian Kompos TKKS dan Jarak Tanam di Dataran Rendah Tombang Romario Simangunsong; Jonatan Ginting; Mbue Kata Bangun
Jurnal Agroekoteknologi Vol 4, No 1 (2016)
Publisher : Universitas Sumatera Utara

This research was to study the response of the growth and yield of shallot (Allium ascalonicum L.) on the aplication of palm oil empty fruit bunches compost and the plant spacing in the lowlands. This research was conducted at the land of citizens in Jl. Pasar I No. 89, Tanjung Sari Village, District of Medan Selayang from May until July 2015, This research used Split Plot Design, as a main plot was the plantspacing (20 cm x 20 cm, 20 cm x 15 cm and 20 cm x 10 cm), as a Sub plot was palm oil empty fruit bunches compost (0 kg, 0.5 kg, 1 kg, 1.5 kg and 2 kg). The results showed that the giving of palm oil empty fruit bunches compost was significantly affected to the fresh weight per sample,the dry weight per sample, fresh weight per plot and dry weight per plot where the best on to gave 1.899 kg/plot could increased the fresh weight per plot was 232 g. Best treatment on fresh weight bulb per plot was J1 with giving 1.87 kg/plot i,e, 234.86 g and dry weight bulb per plot on J3 with giving 1.899 kg/plot i,e, 230 g.Keywords: shallot, plant spacing, palm oil empty fruit bunches compost.This research was to study the response of the growth and yield of shallot (Allium ascalonicum L.) on the aplication of palm oil empty fruit bunches compost and the plant spacing in the lowlands. This research was conducted at the land of citizens in Jl. Pasar I No. 89, Tanjung Sari Village, District of Medan Selayang from May until July 2015, This research used Split Plot Design, as a main plot was the plantspacing (20 cm x 20 cm, 20 cm x 15 cm and 20 cm x 10 cm), as a Sub plot was palm oil empty fruit bunches compost (0 kg, 0.5 kg, 1 kg, 1.5 kg and 2 kg). The results showed that the giving of palm oil empty fruit bunches compost was significantly affected to the fresh weight per sample,the dry weight per sample, fresh weight per plot and dry weight per plot where the best on to gave 1.899 kg/plot could increased the fresh weight per plot was 232 g. Best treatment on fresh weight bulb per plot was J1 with giving 1.87 kg/plot i,e, 234.86 g and dry weight bulb per plot on J3 with giving 1.899 kg/plot i,e, 230 g.Keywords: shallot, plant spacing, palm oil empty fruit bunches compost.

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