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INDONESIA
Jurnal Penelitian Saintek
Published by Universitas Negeri Yogyakarta
ISSN : 14123991     EISSN : 25287036     DOI : 10.21831
Core Subject : Science,
Decision Sciences, Operations Research & Management
Arjuna Subject : -
Articles 7 Documents
 1 
Search results for , issue "Vol 23, No 1 (2018): April 2018" : 7 Documents clear
THE EFFECTS OF PRESSURE AND TYPE OF FILLING GEL TOWARD THE INTENSITY OUTPUT IN PLASTIC OPTICAL FIBER Aisyah Ninda Kusuma Wati; Heru Kuswanto
Jurnal Penelitian Saintek Vol 23, No 1 (2018): April 2018
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (766.63 KB) | DOI: 10.21831/jps.v23i1.21470

Abstract

This study was aimed at determining the effect of applying pressure to changes in optical fiber output intensity, giving various kinds of filling gel on the connection to fiber optic output. The optical fiber used was Polymer Optical Fiber (POF) type SH-4001-1.3. This POF has a core refractive index of 1.49 and a cladding refractive index of 1.41. The gel was inserted between the optical fiber with a length of 1 cm in a small pipe, then given a variation of pressure so that it affected the intensity of the light. The optical power output from Polymer Optical Fiber was detected using Optical Power Meter (OPM). The light source used was the HeNe laser with a wavelength of 632.8 nm and an output power of 5 mW. The results show that the intensity of the optical fiber output light increases in line with the addition of pressure. Giving pressure on fiber optic joints using various types of gels show that the best light intensity output value was the yellow gel pen. The best sensitivity value on yellow pen gel at a distance of 0.5 cm with a gradient of (0.0035 ± 0.0028) dBm/cm. While the best linearity is in the type of clear pen gel with a distance of 0 cm which is equal to 0.99919.EFEK TEKANAN DAN JENIS GEL PENGISI SAMBUNGAN TERHADAP INTENSITAS KELUARAN PADA FIBER OPTIK PLASTIKPenelitian ini bertujuan untuk mengetahui pengaruh pemberian tekanan terhadap perubahan intensitas keluaran fiber optik, pemberian berbagai macam gel pengisian pada sambungan terhadap keluaran fiber optik. .Fiber optik yang digunakan adalah Polymer Optical Fiber (POF) tipe SH-4001-1.3. POF ini memiliki indeks bias core sebesar 1,49 dan indeks bias cladding sebesar 1,41. Gel disisipkan di antara fiber optik sepanjang 1 cm di dalam pipa kecil, kemudian diberi variasi tekanan sehingga mempengaruhi intensitas cahaya. Daya optik keluaran dari POF dideteksi menggunakan Optical Power Meter (OPM). Sumber cahaya yang digunakan adalah laser HeNe dengan panjang gelombang 632,8 nm dan daya keluaran 5 mW. Hasil penelitian menunjukkan bahwa intensitas cahaya keluaran fiber optik mengalami penaikan seiring dengan penambahan tekanan. Pemberian tekanan pada penyambungan fiber optik dengan menggunakan berbagai jenis gel menunjukkan bahwa gel yang memiliki nilai keluaran intensitas cahaya terbaik yaitu gel pulpen dengan warna gel kuning. Nilai sensitivitas terbaik pada gel pulpen dengan warna gel kuning pada jarak 0,5 cm dengan gradien sebesar (0,0035 ± 0,0028) dBm/cm. Sedangkan linearitas terbaik terdapat pada jenis gel pulpen dengan warna gel bening pada perlakuan dengan jarak 0 cm yaitu sebesar 0,99919
BIOLOGICAL TEST AND CHARACTERIZATION OF PHOSPHATE RHIZOBACTERIAL ISOLATE USING CORN PLANT INDICATOR Tessa Novianty Putri Asova; Anggi Jingga; Mieke R. Setiawati; Tualar Simarmata
Jurnal Penelitian Saintek Vol 23, No 1 (2018): April 2018
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (110.644 KB) | DOI: 10.21831/jps.v23i1.19098

Abstract

Phosphate rhizobacteria (PR) plays an important role in increasing solubility and availability of phosphate for plants. The experiment to investigate the capabilities of PR isolates was conducted from March to August 2017 in laboratories and greenhouse. Bioassay test using the Murphy media and maize as indicator was arranged as a randomized block design consist of six treatments (one control and five isolates PR) and provided with five replications. The plant height, root length, and dry weigth of plant were measured at 14 days. The dissolved P and enzyme phosphatase production were measured using Bray I and Eivzy Tabatai methods. The result shows that the PR isolates had relatively different ability to dissolve of P, produce of phosphatase and to increase the plant growth. J1M and J5H isolates has produced of phosphatase enzyme 63.25 μg pNP/g/h and 62.84 μg pNP/g/h, soluble phosphate 66.24 ppm and 75.42 ppm. J1M and J5H isolates were able to produce dry weights of plants 728 mg and 660 mg (about 60.3% and 45.3% higher than control).UJI HAYATI DAN KARAKTERISASI ISOLAT RHIZOBAKTERI FOSFAT DENGAN INDIKATOR TANAMAN JAGUNGRhizobakteri fosfat (RF) berperan penting dalam meningkatkan kelarutan dan ketersediaan fosfat bagi tanaman. Eksperimen untuk mengetahui kemampuan isolat RF dengan menggunakan tanaman jagung sebagai indikator telah dilakukan sejak bulan Maret sampai Agustus 2017 di laboratorium dan rumah kaca. Uji hayati (bioassay) menggunakan media Murphy dan tanaman jagung sebagai indikator dilakukan dengan memanfaatkan rancangan acak kelompok yang terdiri dari enam perlakuan (satu kontrol dan 5 isolat RF) dan diberi ulangan sebanyak lima kali. Panjang akar, tinggi tanaman, dan bobot kering tanaman diukur setelah 14 hari. Produksi enzim fosfatase dan P-terlarut diamati dengan menggunakan metoda Eivzy Tabatai dan Bray I. Hasil penelitian menunjukkan bahwa isolat RF memilki kemampuan yang relatif berbeda dalam melarutkan P, produksi fosfatase dan meningkatkan pertumbuhan tanaman. Isolat J1M dan J5H menghasilkan enzim fosfatase sebesar 63,25μg pNP/g/h dan 62,84 μg pNP/g/h dan P-terlarut sebesar 66,24 ppm dan 75,42 ppm. Isolat J1M dan J5H mampu menghasilkan bobot kering tanaman sekitar 728 mg dan 660 mg (sekitar 60,3% dan 45,3% lebih tinggi dibandingkan dengan kontrol).
THE EFFECTS OF COMPOSTED CATTLE MANURE DOSAGE ON THE CLUBROOT DISEASE, THE GROWTH, AND THE YIELD OF BROCCOLI Octa Saktianti; Noor Istifadah
Jurnal Penelitian Saintek Vol 23, No 1 (2018): April 2018
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (47.552 KB) | DOI: 10.21831/jps.v23i1.19326

Abstract

Clubroot disease caused by Plasmodiophora brassicae Wor. is a major constraint in the cultivation of broccoli. Compost has been widely explored as an eco-friendly option for controlling soil-borne pathogens. This study was aimed at examining the ability of several dosage of composted cow manure to suppress clubroot disease and support the growth and yield of broccoli under field conditions. The field experiment was conducted at Cisarua, Western Bandung, West Java. The experiment was arranged in a Complete Randomized Block Design with six treatments and four replications. The treatments tested were cow manure with the dosage of 25, 50, 100, and 200 g/plant, pesticide (active ingredient: flusulfamide), and a non-treated control. The result shows that all compost treatments suppressed clubroot disease by 29,25-45,58%. The application of cow manure compost could also support the growth and the yield of broccoli under field conditions.PENGARUH DOSIS KOMPOS KOTORAN SAPI TERHADAP PENYAKIT AKAR GADA, PERTUMBUHAN, DAN HASIL BROKOLIPenyakit akar gada yang disebabkan oleh Plasmodiophora brassicae Wor. merupakan salah satu kendala utama dalam budidaya brokoli. Bahan organik seperti kompos dapat digunakan untuk pengendalian penyakit secara ramah lingkungan. Tujuan dari penelitian ini yakni untuk mendapatkan dosis kompos kotoran sapi yang efektif untuk menekan penyakit akar gada dan mendukung pertumbuhan dan hasil tanaman brokoli di lapangan. Percobaan lapangan dilakukan di lahan yang endemik akar gada di daerah Cisarua, Bandung Barat, Jawa Barat. Percobaan menggunakan Rancangan Acak Kelompok dengan enam perlakuan dan empat ulangan. Perlakuan yang diuji adalah dosis kompos (25, 50, 100, dan 200 g/tanaman), pestisida (berbahan aktif flusulfamide), dan kontrol. Hasil percobaan menunjukkan bahwa kompos kotoran sapi yang diaplikasikan dengan dosis 25-200g per tanaman memiliki efek penekanan terhadap penyakit akar gada sebesar 29,25-45,58%. Semakin tinggi dosis aplikasi semakin tinggi pula efek penekanan yang dihasilkannya. Aplikasi kompos juga mampu mendukung pertumbuhan dan hasil brokoli di lapangan.
OVIPOTIONAL AND PREFERENCIAL TEST OF Bactrocera albistrigata ON GUAVA EXTRACTS Nadia Farida; Agus Susanto
Jurnal Penelitian Saintek Vol 23, No 1 (2018): April 2018
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (96.393 KB) | DOI: 10.21831/jps.v23i1.19103

Abstract

Bactrocera albistrigata commonly attacks rose apple and guava. It is capable of causing up to 100% damage on guava. The study was aimed at determining the most preffered fruit extract by B. albistrigata.  The research was conducted at Rearing Pest Laboratory of Faculty of Agriculture Universitas Padjadjaran in Jatinangor, Sumedang. The experiment used Completely Randomized Design consisting of three treatments and four replications. The treatments were conducted on red guava extract, rose apple extract, and guava essences by the used of choice and no choice tests. The result shows that in the red guava extract has the highest number of eggs of B. albistrigata compared to that in rose apple extract and guava essences.UJI PREFERENSI DAN OVIPOSISI Bactrocera albistrigata PADA EKSTRAK JAMBUBactrocera albistrigata lebih sering menyerang tanaman jambu biji dan jambu air. Kehilangan hasil pada tanaman jambu biji yang disebabkan oleh serangan lalat buah ini dapat mencapai 100%. Penelitian ini bertujuan untuk mengetahui ekstrak buah yang paling disukai lalat buah B. albistrigata. Penelitian dilaksanakan di Laboratorium Perbanyakan Serangga, Departemen Hama, dan Penyakit Tumbuhan, Fakultas Pertanian, Universitas Padjadjaran, Jatiangor, Sumedang. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) yang terdiri atas 3 perlakuan dengan 4 ulangan. Perlakuan terdiri atas ekstrak jambu biji merah, ekstrak jambu air, dan esens jambu. Dengan menggunakan choice dan no choice test, hasil penelitian menunjukkan bahwa dalam ekstrak jambu biji merah terdapat jumlah telur B. albistrigata yang lebih tinggi dari ekstrak jambu air dan esens jambu.
THE EFFECT OF BIOLOGICAL AND ANORGANIC FERTILIZER TOWARD PHOSPHATE SOLID BACTERIAL POPULATION, THE PLANTS GROWTH, AND PAKCOY USING NUTRIENT FILM Katrina Putri Utami; Mieke Rochimi Setyawati
Jurnal Penelitian Saintek Vol 23, No 1 (2018): April 2018
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (75.428 KB)

Abstract

Nutrient Film Technique (NFT) is a kind of hydroponic techniques which uses inorganic fertilizer nutrients. The use of inorganic fertilizers can be substituted with biological fertilizers so that they are more environmentally friendly. The research on the combination of biological fertilizers and inorganic fertilizers for pakcoy (Brassica rapa L.) plant. Randomized Block Design (RBD) consisting of four treatments was used in this research. They were 100%, 75%, and 50% inorganic fertilizer and 100% biological fertilizer in three periodical times. This research was carried out in September 2017 to January 2018. The parameters observed in this study included Phosphate Solvent Bacteria (PSB), plant growth and pakcoy plants. The result shows that the provision of inorganic fertilizers and biological fertilizers is able to increase the PSB population, plant height, and pakcoy plants. The combination of 50% inorganic fertilizer and biofertilizer produces the best PSB population, plant height and the best result on pakcoy.PENGARUH PUPUK HAYATI DAN ANORGANIK TERHADAP POPULASI BAKTERI PELARUT FOSFAT, TINGGI TANAMAN, DAN HASIL TANAMAN PAKCOY PADA NUTRIENT FILM TECHNIQUESalah satu teknik hidroponik adalah Nutrient Film Technique (NFT). Sistem hidroponik ini masih menggunakan nutrisi berupa pupuk anorganik. Pemakaian pupuk anorganik dapat disubtitusi dengan pemakaian pupuk hayati sehingga lebih ramah lingkungan. Penelitian kombinasi pupuk hayati dan pupuk anorganik untuk tanaman pakcoy (Brassica rapa L.) pada sistem NFT ini menggunakan Rancangan Acak Kelompok (RAK) yang terdiri atas empat perlakuan yaitu 100%, 75%, dan 50% pupuk anorganik ditambah 100% pupuk hayati diulang tiga kali. Penelitian dilaksanakan pada bulan September 2017 sampai Januari 2018. Parameter yang diamati pada penelitian ini antara lain populasi Bakteri Pelarut Fosfat, tinggi tanaman, dan hasil tanaman pakcoy. Pemberian pupuk anorganik dan pupuk hayati dapat meningkatkan populasi BPF, tinggi tanaman, dan hasil tanaman pakcoy. Kombinasi pupuk anorganik 50% dan pupuk hayati menghasilkan populasi BPF, tinggi tanaman, dan hasil tanaman yang terbaik pada tanaman pakcoy.
APPLICATION OF ENDOPHYTIC BACTERIUM BIOFERTILIZER IN TOMATOES HYDROPONIC SYSTEM Imas Komalasari; Mieke Rochimi Setiawati; Ridha Hudaya
Jurnal Penelitian Saintek Vol 23, No 1 (2018): April 2018
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1670.17 KB) | DOI: 10.21831/jps.v23i1.18821

Abstract

The study was aimed at determining the role of endophytic bacteria biofertilizers as the substitutes for the use of inorganic fertilizers for tomato hydroponic systems. The study was conducted in August-December 2017 at the Ciparanje Experimental Garden Greenhouse, Padjadjaran University. The experiment used a randomized block design (RBD) with 7 treatments and 8 replications. Treatment A: 100% inorganic nutrition + 0 biological fertilizer, B: 50% inorganic nutrition + 100% biological fertilizer, C: 75% inorganic nutrition + 100% biological fertilizer, D: 100% inorganic nutrition + 25% biological fertilizer, E: 100% inorganic nutrition + 50% biological fertilizer F: 100% inorganic nutrition + 75% biological fertilizer, G: 100% inorganic nutrition + 100% biological fertilizer. The results show that the application of biofertilizers by reducing the dose of inorganic fertilizer had no significant effect on the population of the leaf and the root on endophytic bacteria, N content and yield of tomato plants. Biofertilizers are able to increase the weight of tomato in the 50% treatment of inorganic nutrients + 100% biofertilizers (B) of 39.69% compared to the use of inorganic fertilizers only without the addition of biological fertilizers (A)APLIKASI PUPUK HAYATI BAKTERI ENDOFITIK PADA SISTEM HIDROPONIK TANAMAN TOMATPenelitian dilakukan untuk mengetahui peran pupuk hayati yang mengandung bakteri endofitik sebagai pensubstitusi penggunaan pupuk anorganik untuk tanaman tomat yang ditanam dengan sistem hidroponik. Penelitian dilakukan pada bulan Agustus-Desember 2017 di Rumah Kaca Kebun Percobaan Ciparanje, Universitas Padjadjaran. Percobaan menggunakan Rancangan Acak Kelompok (RAK) dengan 7 perlakuan dan 8 ulangan. Perlakuan A: 100% nutrisi anorganik + 0 pupuk hayati, B: 50% nutrisi anorganik + 100% pupuk hayati, C: 75%nutrisi anorganik + 100% pupuk hayati, D: 100% nutrisi anorganik + 25% pupuk hayati, E: 100% nutrisi anorganik + 50% pupuk hayati F: 100% nutrisi anorganik + 75% pupuk hayati,G: 100% nutrisi anorganik + 100% pupuk hayati. Hasil penelitian menunjukkan bahwa pemberian pupuk hayati dengan mengurangi dosis pupuk anorganik tidak berpengaruh nyata terhadap populasi bakteri endofitik daun dan akar, kandungan N dan hasil tanaman tomat. Pupuk hayati mampu meningkatkan bobot buah tomat pada perlakuan 50% nutrisi anorganik + 100% pupuk hayati (B) sebesar 39,69% dibandingkan hanya menggunakan pupuk anorganik tanpa penambahan pupuk hayati (A).
THE EFFECT OF METALAXYL, FENAMIDONE, AND DIMETOMORF FUNGICIDE TOWARDS CONIDIA Peronosclerospora spp. ISOLATED FROM KLATEN Fajri Maulana Anugrah; Fitri Widiantini
Jurnal Penelitian Saintek Vol 23, No 1 (2018): April 2018
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (132.345 KB) | DOI: 10.21831/jps.v23i1.19224

Abstract

This study was aimed at determining the effect of three types of fungicide namely methaxyl, dimethomorph, and fenamidone to control downy mildew against conidia Peronosclerospora spp. in Klaten (Central Java). The study was carried out by conidia germination method and damage observation caused by the addition of fungicide to conidia. The results show that the fungicide treatment of methomorphic at a concentration of 10,000 ppm was still effective in inhibiting the development of downy mildew. It was shown by its ability to suppress the total germination of conidia Peronosclerospora spp. and causes 37.9% conidial damage. The use of fenamidone at a concentration of 8,000 ppm is able to inhibit conidia germination (0.34%), the lowest level of conidian damage detected is 8.54%. Meanwhile, metallaxill still has a good suppressive effect as indicated by the low conidia germination of 0.70% and conidial damage reaches up to 19.91%PENGARUH FUNGISIDA BERBAHAN AKTIF METALAKSIL, FENAMIDONE, DAN DIMETOMORF TERHADAP KONIDIA Peronosclerospora spp. ISOLAT KLATENPenelitian ini bertujuan untuk mengetahui pengaruh tiga jenis bahan aktif fungisida yang umum digunakan yaitu metalaksil, dimetomorf, dan fenamidon untuk mengendalikan penyakit bulai terhadap konidia Peronosclerospora spp. di Klaten (Jawa Tengah). Penelitian dilakukan dengan metode perkecambahan konidia dan mengamati kerusakan yang diakibatkan oleh penambahan fungisida terhadap konidia. Hasil penelitian menunjukkan bahwa perlakuan fungisida dimetomorf pada konsentrasi 10.000 ppm masih efektif menghambat perkembangan penyakit bulai yang ditunjukkan dengan kemampuannya menekan secara total perkecambahan konidia Peronosclerospora spp. dan menyebabkan kerusakan konidia sebesar 37,9%. Pengguunaan fenamidon pada konsentrasi 8.000 ppm dapat menghambat perkecambahan konidia (0,34%), tingkat kerusakan konidianya terdeteksi paling rendah yaitu sebesar 8,54%. Metalaksil masih memberikan efek penekanan yang baik yang ditunjukkan dengan rendahnya perkecambahan konidia yaitu sebesar 0,70% dan kerusakan konidia yang mencapai 19,91%.

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