Irsal Irsal
Universitas Sumatera utara

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PENGARUH CAMPURAN MEDIA TUMBUH DAN DOSIS PUPUK NPK (16:16:16) TERHADAP PERTUMBUHAN KAKAO (Theobroma cacao L.) DI PEMBIBITAN

AGROEKOTEKNOLOGI Vol 1, No 1 (2012)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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Abstract

ABSTRACT Influence of mixing media and dosage NPK (16:16:16) to cocoa (Theobroma cacao L.) in a nursery. Design of the experiment was randomized block design arranged in factorial with two factors. The first factor was planting media, 100% Subsoil Ultisol + 0% EOPB Compost, 75% Subsoil Ultisol + 25% EOPB Compost, 50% Subsoil Ultisol + 50% EOPB Compost, 25% Subsoil Ultisol + 75% EOPB Compost, 0% Subsoil Ultisol + 100% EOPB Compost.. The second factor is NPK Fertilizer (16:16:16), 0 g/polybag, 4 g/polybag, 8 g/polybag, 12 g/polybag. The parameters observed includes plant height (cm), number leafs (sheet), diameter of stem (mm), total of broad leaf (cm2), fresh and dry weight of crown (g) fresh and dry weight of root (g). The result showed that planting media influential significantly on leaf number, total of broad leaf, fresh and dryweight of crown, fresh and of root. Present of manure in fluential significantly on plant height, number of leaves, diameter of stem, total of broad leaf, fresh and  dryweight of crown and freshweight of root. Interaction between planting media and present of fertilizer influential significantly to diameter of stem 6, 8, 10, 12 and 14 weeks after planted and total of broad leaf.   Keywords : Empty Oil Palm Bunch (EOPB) compost, NPK fertilizer, cacao, nursery ABSTRAK Pengaruh campuran media tumbuh dan dosis pupuk NPK (16:16:16) terhadap pertumbuhan kakao (Theobroma cacao  L.) di pembibitan.  Rancangan Penelitian yang digunakan adalah Rancangan Acak Kelompok (RAK) factorial dengan 2 faktor. Faktor pertama adalah media tanam, yaitu  100% Subsoil Ultisol (Bobot) + 0% Pupuk kompos (TKKS), 75% Subsoil Ultisol (Bobot) + 25% Pupuk kompos (TKKS), 50%  Subsoil Ultisol (Bobot) +  50% Pupuk kompos (TKKS), 25% Subsoil Ultisol (Bobot) + 75% Pupuk kompos (TKKS), 0% Subsoil Ultisol (Bobot) + 100% Pupuk kompos (TKKS). Faktor kedua yakni Pemberian pupuk NPK (16:16:16) 0 g/polibag, 4 g/polibeg, 8 g/polibeg, 12 g/polibeg. Peubah amatan yang diamati antara lain tinggi bibit (cm), jumlah daun (helai), diameter batang (mm), total luas daun (cm2), bobot basah dan bobot kering  tajuk (g), serta bobot basah dan bobot kering akar (g).Hasil penelitian menunjukan bahwa perlakuan campuran media tumbuh  (subsoil ultisol + TKKS) berpengaruh nyata terhadap jumlah daun,  total luas daun, bobot basah tajuk, bobot basah akar, dan bobot kering akar. Pemberian pupuk NPK (16:16:16) berpengaruh nyata terhadap tinggi bibit, jumlah daun, total luas daun, bobot basah tajuk, bobot kering tajuk, bobot basah akar, dan bobot kering akar. Interaksi media tanam (subsoil ultisol + TKKS) dan pemberian pupuk NPK  (16:16:16) secara signifikan berpengaruh nyata pada diameter batang bibit kakao umur 6, 8, 10, 12 dan 14 MST serta bobot basah tajuk umur 14 MST Kata kunci : pupuk kompos TKKS, pupuk NPK, kakao, pembibitan

APLIKASI PUPUK ORGANIK DAN BENZILADENIN TERHADAP PERTUMBUHAN DAN PRODUKSI TANAMAN ROSELA (Hibiscus sabdariffa L.)

AGROEKOTEKNOLOGI Vol 1, No 4 (2013)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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Abstract

This research has been conducted to study the effect of organic matter andbenziladenin aplication on the growth and yield of the roselle. Research wasconducted on Research Center at Tanjung Selamat Village, sub district sunggalwith a height of 57 m above sea level during February-June 2012, using factorialrandomized block design with two factors, they are compost (0, 200, 400g/polybag) and benziladenin (0, 100, 200, 300 cc/l). The parameters observedwere plant height, flowering age, branch number, fruit production per plant, freshweight of fruits per plant, fresh weight of petals per plant, dry weightof petals perplant and seed weight per plant. The result of the research showed that compostsignificantly increased all parameters, bensiladenin significantly increased thebranch number, and interaction of both compost and benziladenine did not showany significant effect on all parameters.

RESPONS PERTUMBUHAN BIBIT KAKAO (Theobroma cacao L.) TERHADAP BEBERAPA KOMPOSISI KOMPOS KULIT BUAH KAKAO DENGAN SUBSOIL ULTISOL DAN PUPUK DAUN

AGROEKOTEKNOLOGI Vol 2, No 1 (2013)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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Abstract

ABSTRACTThe response of cocoa seedlings growth (Theobroma cacao L.) by application some composition ofcocoa waste compost with subsoil ultisol and leaf fertilizer. The research was conducted incommunity land, Tanjung Selamat at analtitude ± 57 meters above sea level since May 2012 untilSeptember 2012 using Randomized Block Design (RDB) factorial with two factors. The first factoris Cocoa Waste Compost with Subsoil Ultisol (25 + 4975, 75 + 4925, 125 + 4875, 175 + 4825, 225+ 4775 g/polybag). The second factor is leaf fertilizer (1, 3, and 5 cc/liter). The Parameter observedincludes plant hight (cm), diameter of stem (mm), leaf area total (cm2), fresh and dry weight ofcrown (g) fresh and dry weight of root (g). The result of reseach showed that planting mediainfluential significantly on plant height and diameter of stem. Present of leaf fertilizer influentialsignificantly on diameter of stem and dry off root. Interaction between planting media present offertilizer not influential significantly on plant height, diameter of stem, total of broad leaf, fresh anddry weight of crown, fresh and dry off root.Key words : cocoa waste compost, leaf fertilizer, cacao, nursery

PERTUMBUHAN BIBIT KAKAO (Theobroma cacao.L) PADA MEDIA SUBSOIL ULTISOL DENGAN PEMBERIAN PUPUK NPKMg DAN PUPUK KANDANG AYAM

AGROEKOTEKNOLOGI Vol 2, No 1 (2013)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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Abstract

ABSTRACTGrowth of Cocoa Seedlings (Theobroma cacao.L) In Media Ultisol Subsoil with FertilizerProvision NPKMg(15:15:6:4) and Manure. This research aims to determine the effect of manureand fertilizier NPKMg(15:15:6:4) on the growth of cocoa (Theobroma cacao.L) in media landultisol subsoil. Research carried out in field trials USU Faculty of Agriculture, Medan with altitudeof about 25 meters above sea level at the beginning of November until March 2012. Experimentalmethod use is a randomized block design with two treatment factor. Planting media as the firstfactor with five standard treatment that is 0% Manure + 100% Ultisol Subsoil, 25% Manure + 75%Ultisol Subsoil, 50% Manure + 50% Ultisol Subsoil, 75% Manure + 25% Ultisol Subsoil, 100%Manure + 0% Ultisol Subsoil and fertilizer NPKMg(15:15:6:4) as the second factor with four levelis 0 g/polibag, 4 g/polibag, 8 g/polibag and 12 g/polibag with 3 replications. Parameter wereobserved at high parameters of shoots, girth, number of leaves, the aweight of wet canopy, wetweight of roots, canopy dry weight, and root dry weight. The results that 75% Manure + 25%Ultisol Subsoil showed the best results at high parameters of shoots, girth, number of leaves, theaweight of wet canopy, wet weight of roots, canopy dry weight, and root dry weight. NPKMgfertilizier(15:15:6:4) in this study showed significant results in all parameters, but obtained at thehighest treatment level 8 g/polibag and 12 g/polibag. The interaction effect was not significanteffect on all parameters.Keywords: manure, NPKMg fertilizer, Theobroma cacao.L .poultry manure

PENGARUH CURAH HUJAN DAN HARI HUJAN TERHADAP PRODUKSI KELAPA SAWIT BERUMUR 5, 10 DAN 15 TAHUN DI KEBUN BEGERPANG ESTATE PT.PP LONDON SUMATRA INDONESIA, Tbk

AGROEKOTEKNOLOGI Vol 2, No 3 (2014)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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One of the determining factors of water supply for oil palm which does not use irigation system israin fall. Water supply is the main factor that cope production rate of oil palm. Water supply for oilpalm in field is obtained from rain fall. This research is done in PT.PP London Sumatra Indonesia,Tbk Begerpang Estate plantations, North Sumatera Province, Medan from June to September 2013.This research used secondary data available in company administration. Secondary data for analysisneed consists of component production data as total bunches, average bunches weight, total ofproductive trees, loose fruit weight; production of fresh fruit bunch (FFB); rain fall data and rainday monthly in 2008, 2009 and 2010 on 6 divisions. Analysis method used is double linierregression and correlation analysis. Model tested by classic asumption consists of normality test,heteroskedasticity test, multicollinearity, and autocorellations test by using statistic softwareSPSS.v.17 for windows. The regression analysis shows that rain fall and rain day variables havesignificant influence with alpha 5% (Sig < α 0,05) in FFB production aged 5 years. F-value is5,235 with significant level 0,031. Coeffisien determination obtained is 53,8%. It means 53,8%variance of FFB production can be explained by variables used in this research and the rest 46,2% isexplained by other variables which are excluded. Linier regression model on 5 years is Y = 145,982+ 1,451 rain fall – 27,005 rain day + E. Corelation result on 5, 10 and 15 years with two-tailedanalysis with significant level 1% shows that rain fall and rain day have tight, significant, and samedirection relationship. Corelation value of rain fall and rain day are 0,892; 0,887; and 0,855 eachwith significant level 0,000 (Sig < α 0,01).Keywords: rain fall, rain day, FFB production.

KADAR N, P DAN K TANAH PADA TANAMAN KELAPA SAWIT MENGHASILKAN DENGAN BERBAGAI KOMPOSISI PENANAMAN TANAMAN SELA DI BAWAH TEGAKAN

AGROEKOTEKNOLOGI Vol 2, No 3 (2014)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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Abstract

NPK soil on oil palm produce plantation with increase diversity of vegetation. Soil fertility level onthe oil palm produce will be decreased, because there is no vegetation. Therefore, one the effort toincrease the soil productivity with planting of vegetation diversity under oil palm trees. Theresearch aimed to know NPK soil on oil palm produce plantation with increase diversity ofvegetation. The research was carried out in the PTPN III Kebun Bangun Simalungun regency,North Sumatera from September to Desember 2013. The experiment design was non factorialCompletely Randomized Design with 5 levels intercrop compotition, Arachis glabrata 100%,Stenotaphrum secundatum 100%, Arachis glabrata 50% + Stenotaphrum secundatum 50%, Arachisglabrata 75% + Stenotaphrum secundatum 25% dan Arachis glabrata 25% + Stenotaphrumsecundatum 75%. The analysis of data using the analysis variance and continued by DMRT. Theresults of this research showed that diversity compotitions intercrops given significant effect on thefresh weight leaf of Stenotaphrum secundatum 100%, the dry weight leaf of Stenotaphrumsecundatum 100%, the fresh weight root of Arachis glabrata 75%, the dry weight root of Arachisglabrata 75% and could increased the levels of soil phosphorus, but not significant effect on the oilpalm leaf chlorophyll, the intercrops leaf chlorophyll, the levels of soil nitrogen and potassium.Keywords: Intercrops, NPK soil, leaf chlorophyll

Tanggap Pertumbuhan dan Produksi Tembakau Deli (Nicotiana tabacum L.) terhadap Pemberian Vermikompos pada Beberapa Tingkat Pemberian Air

AGROEKOTEKNOLOGI Vol 2, No 4 (2014)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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Abstract

Deli tobacco is one of the leading agricultural commodity in North Sumatera . Water availablity andorganic material is very important aspect that influence quality of tobacco leaf. For that purposethis research aimed to know response growth and yield of Deli tobacco by giving vermicompost onwater treatments. This research was conducted in Green House of Agricalture Faculty University ofnorth sumatera in November 2013 – January 2014 using a randomized block design with twofactors and three replications. The first factor is vermicompost giving (control, 10%, 20% and30%). The second factor is water treatments (100%, 75%, 50% and 25%). Parameter observed wereplant height, numbers of leaf, stem of diameter, long leaves sand, 1 foot long leaves,leaf widthsand, 1 foot wide leaves, thick leaf sand, 1 foot thick leaves, summarize of leaf area, greennes ofleaf, root length, plant dry weight, water use efficiency.The results showed that vermicompostgiving significantly effect stem of diameter 18 days after transplanting. Water treatments showsincreasing effect stem of diameter 46 days after transplanting, long leaves sand, leaf width sand,thick leaf sand and water use efficiency.Keywords : vermicompost, water treatments, Deli tobacco

Pemanfaatan Mikofer pada Kelapa Sawit dengan Interval Penyiraman di Pembibitan

AGROEKOTEKNOLOGI Vol 3, No 1 (2015)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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Abstract

The availability of water that is limited for watering during the dry season, especially in the largearea of oil palm nursery can be overcome by saving the water, which, in this research is the intervalwatering. Another alternative that can be applied is the utilization of mycofer. The research wasconducted in the greenhouse of the Faculty of Agriculture University of North Sumatra fromSeptember 2013 to January 2014. Research design was factorial randomized block design with twofactors : mycofer application (0, 5, 10, 15 g/seedling) and the interval watering (every day, threedays and five days). Parameters observed were percentage of root infection, leaf area total, dryweight of shoot, dry weight of root, and water use efficiency (WUE). The result showed thatmycofer application significantly affected the percentage of root infection which the highestinfection on 18th week after application was 28,89% as the result of 10 grams mycofer application.There was no significant effect of both mycofer application and watering interval in leaf area total,dry weight of shoot and root. Watering interval significantly affected the WUE which the highestWUE was 13,69% as the result of five days watering interval. Moreover, the watering interval forfive days in the research didn’t impair the oil palm growth within 18 weeks. The interaction had nosignificant effect on all of the parameters observed.Keywords: mycofer, watering interval, oil palm

Respons Pertumbuhan Bibit Kakao (Theobroma cacao L.) Terhadap Pemberian Pupuk Organik Vermikompos dan Interval Waktu Penyiraman Air Pada Tanah Subsoil

AGROEKOTEKNOLOGI Vol 3, No 1 (2015)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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Abstract

The aim of this research was to determine growth response of cacao seedlings by givingvermicompost and watering time interval in the subsoil. The research had been conducted in theGreenhouse Faculty of Agriculture, University of Sumatera Utara, Medan on May 2013 untilAugust 2013 by using Randomized Block Design with two factors: vermicompost (0, 10, 20, 30%growth media volume) and watering time interval (1, 3, 5, and 7 days). The parameters observedwere plant height, stem diameter, total of leaf area, canopy fresh weight, canopy dry weight, rootfresh weight, root dry weight, root height, and water use efficiency. The results showed thatvermicompost has significant effects to plant height 4-14 WAP, stem diameter 4-14 WAP, total ofleaf area, root fresh weight, root height and water use efficiency but not significant to canopy freshweight, canopy dry weight and root dry weight. Watering time interval has significant effects toplant height 10, 12 and 14 WAP, stem diameter 8, 10, 12 and 14 MST, canopy fresh weight, canopydry weight,total of leaf area and water use efficiency but not significant to plant height 4, 6 and 8MST, stem diameter 4 and 6 WAP, root fresh weight, root dry weight, and root height.Theinteraction of vermicompost and watering interval had not significant.Keywords : vermicompost, Watering Time Interval, Cacao

Pengaruh Curah Hujan dan Hari Hujan terhadap Produksi Kelapa Sawit Berumur 12,15,18 Tahun di PTPN II Unit Sawit Seberang – Babalan Kecamatan Sawit Seberang Kabupaten Langkat

AGROEKOTEKNOLOGI Vol 3, No 1 (2015)
Publisher : Program studi Agroekoteknologi, Fakultas Pertanian, Universitas Sumatera Utara-Medan

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Abstract

The climate factor is very influential to the growth and productivity of palm oil. Rainfall is animportant climatic element observed. Where the palm oil is a plant that requires large amounts ofwater than other crops. Purpose of this research was to determine the effect of rainfall and rain dayas well as the correlation of both on palm oil production in plants aged 12, 15 and 18 years. Thisresearch was held at PTPN II Unit Sawit Seberang–Babalan Sub-district Sawit Seberang DistrictLangkat Province of North Sumatera from March 2014 to September 2014. This research usedprimary data available in company administration. Primary data for the purposes of data analysisincludes the production of fresh fruit bunches (FFB); componen production data as total bunches,average bunches weight, and total of productive trees; rainfall data and rain day monthly in 2011,2012, and 2013 on 9 afdeling. Analysis method used are double linier regression and correlationanalysis. Model tested by classic asumption consists of normality test, heteroskedasticity test,multicollinearity, and autocorellations test by using statistic software SPSS.v.18 for windows. Theregression analysis shows that rain fall and rain day variables haven’t significant influence with alpha 5% (Sig < α 0.05) to increase the production of FFB at the age of 12, 15, and 18 years. This isbecause the rainfall is not evenly distributed throughout the year and less than optimal for thegrowth and production of FFB. From the results of the classical assumption test conducted todetermine whether the multiple regression equation feasible or not to use the regression equation toconclude that the oil palms aged 12, 15, and 18 years are qualified. Correlation results in plants was12, 15, and 18 years with two-way analysis test at 1% level showed variable rainfall and rainy dayshave a strong relationship, and the real (positive) direction. Correlation values of rainfall and rainydays are 0.895; 0.887; and 0.911 each with significant level < α 0.01. Keywords: rainfall, rain day, FFB production.