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ONE OF THE CAUSES OF THE LOW PRODUCTIVITY OF RICE GROWN ON PEAT SOILS WAS THE HIGH LEVELS OF OF TOXIC PHENOLIC COMPOUNDS IN THE SOIL. DEVELOPMENT OF TOLERANT RICE VARIETIES IS ONE OF STRATEGIES TO GROW RICE ON PEAT SOILS. THE AIMS OF THIS RESEARCH WERE TO SELECT RICE VARIETIES TOLERANT TO PEAT SOILS AND TO STUDY THE CORRELATION BETWEEN THE PLANT PHENOLIC ACID CONTENT WITH PLANT TOLERANCE TO PEAT SOIL. THIS RESEARCH WAS CONDUCTED AT THE SEED FARM CENTRE LUBUK MINTURUN, PADANG FROM FEBRUARY TO JUL Haryoko, Widodo; Kasli, ,; Suliansyah, Irfan; Syarif, Auzar; Prasetyo, Teguh Budi
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 40 No. 2 (2012): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24831/jai.v40i2.6358

Abstract

One of the causes of the low productivity of rice grown on peat soils was the high levels of of toxic phenolic compounds in the soil. Development of tolerant rice varieties is one of strategies to grow rice on peat soils. The aims of this research were to select rice varieties tolerant to peat soils and to study the correlation between the plant phenolic acid content with plant tolerance to peat soil. This research was conducted at the Seed Farm Centre Lubuk Minturun, Padang from February to July 2009. The research consisted of two experiments i.e. in peat soil and in mineral soil. The experiments used a completely randomized design using 21 varieties of rice as treatments which were replicated four times. The results showed that there were nine rice varieties categorized as tolerant to peat soil. These tolerant varieties showed higher stress tolerance index (STI), demonstrated by a high level of phenolic acids (coumaric, syringic, and ferulic) in the plant tissues. The STI value had positive correlation with the content of plant phenolic acids, thus the level of plant phenolic acids can be used as an indicator to determine tolerant rice varieties in peat soils. Keywords: peat soil, phenolic acids, tolerant rice, STI
PERILAKU ASAM HIDROKSI BENZOAT DAN ASAM P- KUMARAT PADA TANAH GAMBUT YANG DIBERI FLY ASH SERTA KAITANNYA DENGAN UNSUR KALSIUM DAN MAGNESIUM Nurdin, Hazli; Suyani, Hamzar; Prasetyo, Teguh Budi
Jurnal Pilar Sains Vol 7, No 2 (2008)
Publisher : Jurnal Pilar Sains

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Abstract

Penelitian ini ditujukan untuk mempelajari perilaku asam fenolat pada tanah gambut danbagaimana kaitannya dengan unsur kalsium dan magnesium. Asam fenolat yang diteliti pada penelitian iniadalah asam hidroksi benzoat dan asam p- kumarat, Sampel yang digunakan tanah gambut dari daerahRimbo Panjang . Km 18 dari kota Pekanbaru.Hasil yang diperoleh dari penelitian ini adalah pemberian fly ash terhadap tanah gambut ternyatadapat menurunkan kandungan asam hidroksi benzoate dari 27,42 ppm ke 0,20 ppm; asam p-kumarat 17,22ppm ke 0,11 ppm serta dapat meningkatkan pH dari 3,5 ke 6,47 , ketersediaan hara kalsium 595,24 ppmke 2569,36 ppm dan magnesium dari 365,05 ppm ke 469,45 ppm pada tanah gambut.Penurunan kandungan asam fenolat sebagai akibat pemberian fly ash dapat meningkatkanketersediaan unsur hara kalsium ( Ca) dan Magnesium.Key word : Gambut, fly ash. Asam fenolat,kalsium, magnesium
HUMIC ACID AND WATER MANAGEMENT TO DECREASE FERRO (FE2+) SOLUTION AND INCREASE PRODUCTIVITY OF ESTABLISHED NEW RICE FIELD Herviyanti, .; Prasetyo, Teguh Budi; Ahmad, Fachri; Saidi, Amrizal
Journal of Tropical Soils Vol 17, No 1: Januari 2012
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2012.v17i1.%p

Abstract

The purpose of this research was to gain a technological breakthrough in controlling Fe toxicity (Fe2+) on Ultisol in a new established rice field by using humic acid from rice straw compost and water management, so that optimal production of rice plants could be achieved. The experiment was designed using a 2 × 4 factorials with 3 replications in a split plot design. The main plot was water management consists of 2 levels: continuous and intermittent irrigation (2 weeks flooded and 2 weeks field capacity). Small plot was humic acid which was extracted from rice straw compost by NaOH 0.5 N which consists of 4 levels: 0, 200, 400, and 600 mg kg-1.  The results showed that applications of humic acid from 0 to 600 mg kg-1 that was followed by 2 weeks of intermittent irrigation decreased Fe2+ concentration. It was approaching levels that were not toxic to plants, with soil Fe2+ between 180-250 mg kg-1. The best treatment was found at the application of 600 mg kg-1 humic acid extracted from rice straw compost combined with 2 week flooded ? 2 weeks field capacity of water management. Those treatment decreased Fe2+ concentration from 1,614 to 180 mg kg-1 and increased the dry weight of grain from 5.15 to 16.73 g pot-1 compared to continuous flooding and without humic acid application.
PEMANFAATAN TITHONIA DIVERSIFOLIA PADA TANAH SAWAH YANG DIPUPUK P SECARA STARTER TERHADAP PRODUKSI SERTA SERAPAN HARA N, P, DAN K TANAMAN PADI Gusnidar, .; Prasetyo, Teguh Budi
Journal of Tropical Soils Vol 13, No 3: September 2008
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2008.v13i3.209-216

Abstract

The research of Tithonia diversifolia utilization in the paddy soil that was fertilized P-starter on yield and N, P, K uptake on rice crop, has been conducted from August to December 2005.  The objective of this research was to determine interaction between P-starter levels, and tithonia levels on production and N, P, K element uptake of rice crop. The research was pot experiment in the green house in factorial design 4 x 4.  First factor was 4 levels of tithonia with reduce dosage fertilizer aplied (T0 = 0 t tithonia + 200 kgUrea ha-1 + 75 kg KCl ha-1; T1= 2,5 t tithonia ha-1 + 150 kg Urea ha-1, without KCl; T2 = 5,0 t tithonia ha-1 + 100 kg Urea ha-1, without KCl; dan T3 = 7,5 t tithonia ha-1 + 50 kg Urea ha-1, without KCl).  The second factor was 4 levels of P-starter (0, 2, 4, and 6 kg P ha-1).  The result showed that combination T3 treatment and 2-4 kg P-starter ha-1 increased the grain yield 20,51-21,08 g pot-1 (18,65-19,21%). Effect of T3 treatment was not significant with T2 treatment on the grain yield.  The best interaction was T3 treatment on N and K uptake ((0,84 g pot-1 for N, dan 0,82 g pot-1 for K).  
THE PROPERTIES OF HUMIC ACIDS EXTRACTED FROM FOUR SOURCES OF ORGANIC MATTERS AND THEIR ABILITY TO BIND FE2+ AT NEW ESTABLISHED RICE FIELD Herviyanti, .; Prasetyo, Teguh Budi; Ahmad, Fachri; Darmawan, .
Journal of Tropical Soils Vol 15, No 3: September 2010
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2010.v15i3.%p

Abstract

The Properties of Humic Acids Extracted from Four Sources of Organic Matters and Their Ability to Bind Fe2+ at New Established Rice Field (Herviyanti, TB Prasetyo, F Ahmad and Darmawan):  In order to identify the properties of humic acid extracted from four kinds of organic matters (a peat soil, a stable manure, a compost of rice straw and a municipal waste)  and their potentiality to bind Fe2+  at new established rice field, a series of experiment was done in Soil Laboratory Faculty of Agriculture, Andalas University Padang. First step was characterization of functional groups and other chemical properties of humic acids, and their reaction with Fe2+. The second step was to examine the ability of humic acids to bind Fe2+ solution at new established rice field by conducting incubation experiments.  The experiment used  a completely randomized design with three replications.  The 450 ppm Fe solution was treated with 0, 50, 100, 150, 200, 250, 300, 350, 400, and 450 ppm humic acids and incubated for 24 hours.  While top soil samples taken from Sitiung, West Sumatera were treated with 0,100, 200, 300, and 400 ppm humic acids, flooded with deionized water, and incubated for 6 weeks.  The result showed that   the functional group and other chemical characteristic of humic acid from rice straw compost and peat soil were better than those of manure and municipal waste compost. Functional group of both humic acids was dominated by COO-. High reactivity of the humic acid had been found when humic acids were added to Fe solution with ratio 1 : 1. Use of humic acid extracted from peat soil with the levels from 0 to 100, 200, 300, and 400 ppm decreased the Fe2+ concentration from 1.361 ppm to  910, 860, 831, and 776 ppm, respectively at new established rice field.  While the use of humic acid extracted from  rice straw compost with the same levels as above decreased the Fe2+ concentration  from 1361 to 770, 701, 612, and 600 ppm, respectively, after four weeks of flooding.
Pengembangan Durian Batu Busuak, Kelurahan Lambung Bukit, Kota Padang Hamid, Hasmiandy; Hayati, P.K. Dewi; Sutoyo, Sutoyo; Swasti, Etti; Zainal, Aprizal; Prasetyo, Teguh Budi; Santoso, Panca Jarot
LOGISTA - Jurnal Ilmiah Pengabdian kepada Masyarakat Vol 2 No 2 (2018)
Publisher : Department of Agricultural Product Technology, Faculty of Agricultural Technology, Universitas Andalas Kampus Limau Manis - Padang, Sumatera Barat Indonesia-25163

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/logista.2.2.45-51.2018

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ABSTRAK: Kampung Batu Busuk Kelurahan Lambung Bukit Kecamatan Pauh merupakan salah satu sentra produksi buah durian di Sumatera Barat.Walaupun nama durian Batu Busuk sudah terkenal dan banyak dicari oleh pencinta durian pada saat musim durian, namun belum ada upaya untuk mengangkat durian Batu Busuk untuk bisa dikenal lebih luas. Langkah awal untuk mengangkat nama durian Batu Busuk adalah membenahi identitas varietas durian Batu Busuk, karena sampai sekarang karakteristik dari durian Batu Busuk yang sesungguhnya tidak jelas.Tanaman yang sudah dikarakterisasi juga perlu diperbanyak agar kedepan, buah yang dihasilkan oleh kelurahan Batu Busuk adalah buah dengan karakter unggul tertentu. Masyarakat atau petani yang menanam durian juga perlu memiliki keahlian memperbanyak durian unggulnya. Penerapan ipteks yang dilakukan pada kegiatan pengabdian pada masyarakat ini menggunakan beberapa metode antara lain penyuluhan, demonstrasi aplikasi dan demplot pembibitan durian. Hasil kegiatan menunjukkan bahwa kegiatan penyuluhan yang dilakukan berhasil meningkatkan pengetahuan masyarakat Batu Busuk mengenai arti penting pendaftaran varietas durian. Kegiatan demplot pembibitan durian dan demonstrasi teknik sambung meningkatkan pengetahuan dan keterampilan masyarakat mengenai propagasi durian. Kata kunci: Durian ungggul, Pendaftaran varietas, Teknologi tepat guna, Teknik sambung Development of Durian Batu Busuak, Lambung Bukit Village, Padang CityABSTRACT: Batu Busuk area, Lambung Bukit Village, Pauh Subdistrict, is one area of the centers of durian fruit production in West Sumatra. Although the Batu Busuk durian is already well-known and is sought after by durian lovers during the durian season, there is no attempt to lift the Batu Busuk durian to be known more widely. The first step to lifting the Batu Busuk durian is to fix the varieties identity of the Batu Busuk durian because until now the characteristics of the real Batu Busuk durian are not clear. Plants that have been characterized also need to be propagated so that in the future, the fruit produced by the Batu Busuk village is a fruit with certain superior characters. The community or farmers who plant durian also need to have the expertise to increase their superior durian. The application of science and technology conducted in community service activities uses several methods including counseling, demonstrations of applicationand demonstration plots of durian nurseries. The results of the activity showed the extension activities conducted succeeded in increasing the knowledge of the Batu Busuk community regarding the importance of registering durian varieties. The activities of the durian nursery demonstration plot and demonstration of connection techniques can increase the knowledge and skills of the community regarding the propagation of durian.Keywords: Superior durian, Varieties registration, Appropriate technology, Connection technique
PENGARUH PEMBERIAN DOLOMIT TERHADAP BEBERAPA SIFAT KIMIA TANAH GAMBUT DAN PERTUMBUHAN SERTA HASIL TANAMAN BAWANG MERAH (Allium ascalonicum L) Ilham, Farah; Prasetyo, Teguh Budi; Prima, Sandra
Jurnal Solum Vol 16, No 1 (2019): JURNAL SOLUM
Publisher : Jurusan Tanah Fakultas Pertanian Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jsolum.16.1.29-39.2019

Abstract

This research was aimed to study the effect of dolomite on chemical properties of peat soil and as well as on growth and yield of onion. The research was in form of pot experiment having 5 treatments (0 ton dolomite Ha-1 ; 2.5 ton dolomite Ha-1 ; 5 ton dolomite Ha-1 ; 7.5 ton dolomite Ha-1 ; 10 ton dolomite Ha-1) and 3 replications which were allocated in Completely Randomized Design. Parameters analyzed were pH H2O, available sulphur, available phosphorus, CEC, and exchangeable cations, as well plant height, plant dry weight, sulphur uptake, and diameter of tubers. Data resulted were analyzed the variance using F-test at 5% level of significance and then it was continued using Duncan New?s Multiple Range Test (DNMRT) at 5% level if F-test > F-table. The results showed that 10 ton dolomite Ha-1was the optimum dose to improve chemical characteristics of peat soils. It increased pH H2O by 1.16 unit, sulphur uptake by 0.005 %, available phosphorus by 5.7 ppm, CEC by 9.67 Cmol Kg-1 and exchangeable K by 0.09 Cmol Kg-1, Mg by 0.19 Cmol Kg-1, Ca by 0.31 Cmol Kg-1 compared to soil without treatment ( 0 ton Ha-1 ). It also increased production of onion, especially plant height by 22.63 cm, plant fresh weight by 43.14 g and dry weight by 2.89 g, tuber fresh weight by 21.92 g, and dry weight by 2.89 g, sulphur uptake by 0.03 %, and diameter of tubers from none to be 2.00 cm compared to soil without treatment.Key words : dolomite, peat soils, onion, soil chemical characteristics
Identifikasi Kualitas Fisik Tabung LPG 3 kg menggunakan Blob Detection dan Fitur Warna RGB to HSV Hidayat, Erwin Yudi; Prasetyo, Teguh Budi
Jurnal Eksplora Informatika Vol 9 No 1 (2019): Jurnal Eksplora Informatika
Publisher : Bagian Perpustakaan dan Publikasi Ilmiah - Institut Teknologi dan Bisnis (ITB) STIKOM Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (737.275 KB) | DOI: 10.30864/eksplora.v9i1.269

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Pengguna gas LPG ukuran 3 kg meningkat setiap tahunnya. Perlu adanya perlindungan agar pengguna merasa aman. Perbaikan fisik tabung LPG 3 kg dilakukan untuk menjaga kualitas. Dalam proses perbaikan tersebut tabung mempunyai standar kelayakan dari warna, bentuk dan masa edar tabung. Dari segi warna tabung dikatakan layak jika tidak terdapat karat lebih dari 15%. Untuk menghindari subjektivitas, identifikasi kelayakan tabung dapat dilakukan menggunakan Blob Detection dan ekstraksi Red Green Blue (RGB) to Hue Saturation Value (HSV). Metode Blob Detection merupakan metode untuk menghitung hubungan suatu grup piksel sesuai dengan kategorinya. Total citra yang digunakan sejumlah 340 dengan format *.jpg, meliputi 160 citra latih, 60 citra kualitas layak sebelum tabung diperbaiki, 60 citra kualitas layak setelah tabung diperbaiki, serta 60 citra tidak. Diperoleh hasil akurasi 100% untuk citra kualitas layak setelah tabung diperbaiki, 73,33% untuk citra tabung kualitas layak sebelum tabung diperbaiki, dan 86,67% untuk kualitas tidak layak.
APPLICATION OF TITHONIA COMPOST AS ALTERNATIVE SYNTHETIC FERTILIZER SOURCE N AND K ON YOUNG OIL PALM PLANTATION Enita, Enita; Hermansyah, Hermansyah; Prasetyo, Teguh Budi
AJARCDE | Asian Journal of Applied Research for Community Development and Empowerment  Vol. 4 No. 1 (2020)
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy (SAFE-Network)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29165/ajarcde.v4i1.40

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Currently, large oil palm plantations are cultivated on ultisol. Ultisol has various constraints in its utilization for the cultivation of plants, because it has high exchangeable Al, low pH, low soil organic nutrient contained, and soil nutrients such as N, P, K, Ca, Mg.  Large quantities and continuous fertilizer are needed for a long time. To solve these problems required to look for alternative fertilizers. These alternative fertilizers are expected to reduce the use of synthetic fertilizers without decreasing production and are available forever. Efforts to produce that location organic matter are the right choice. Tithonia can be grown in the form of alley cropping at young palm plantations. A series of experiments have been conducted at Andalas University experimental farm in Padang, West  Sumatra Province. This study used the Factorial design.  The treatments are tithonia compost and Lime application. There are 3 rd compost doses in 3 replication each treatment. The experimental obtained that tithonia compost dosage 25% and 50% + 25% and 50% synthetic fertilizer were changed soil chemical properties such as increased 0.94 units soil pH, availability of nutrient contained; 6.22% C-organic, 0.25% N-total, 0.37me/100g   exchangeable K, 2.74 me/100g exchangeable-Ca, 0.29 me/100g exchangeable-Mg, in the soil, as well as the decrease of exchangeable Al. Furthermore supporting plant growth such as (plant height, plant length,  and the number of the leaf).  Liming not significantly different for soil chemical properties and growth of oil palm. The higher the compost dose is given the better the growth of oil palms. Cultivation of tithonia as alley cropping at oil palm plantation  can be used as composite materials for synthetic fertilizer substitute source N and K
PENGARUH BERBAGAI JENIS KAPUR DALAM APLIKASI PENGAPURAN UNTUK MEMPERBAIKI SIFAT KIMIA ULTISOL Maulana, Amsar; Herviyanti, H; Prasetyo, Teguh Budi
Jurnal Tanah dan Sumberdaya Lahan Vol 7, No 2 (2020)
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2020.007.2.04

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Liming increases soil fertility through improved soil conditions in acidic soils (Ultisols). This study aimed to determine the effect of limes [CaO; Ca(OH)2; CaCO3 and CaMg(CO3)2 ] on the chemical properties of Ultisols of Limau Manis Padang. Treatments tested in this study application of four types of lime, i.e. A = CaO; B = Ca(OH)2; C = CaCO3; dan D = CaMg(CO3)2. on an Ultisol. A control treatment with no application of lime was also included in this study. After incubation of the soil-lime mixtures for two weeks, the results of the study showed that liming using dolomite [CaMg(CO3)2] was more effective in improving the chemical properties of Ultisols, compared to other types of lime [CaO; Ca(OH)2; CaCO3]. The effect of dolomite on 1*exchangeable Al (1 me Ca 100 g-1) improved chemical properties of an Ultisol from Limau Manis Padang such as pH H2O by 0.35 unit, available P by 1.03 ppm, exchangeable Al by 0.91 cmolc kg-1; exchangeable H by 0.92 cmolc kg-1; CEC by10.49 cmolc kg-1; exchangeable K by 0.03 cmolc kg-1; exchangeable Ca by 0.44 cmolc kg-1 and exchangeable Mg by 1.34 cmol ckg-1, compared to control.