Yudi Sastro
Balai Pengkajian Teknologi Pertanian Jakarta Jl.Raya Ragunan No.30 Pasar Minggu, Jakarta Selatan

Published : 9 Documents
Articles

Found 9 Documents
Search

SEKRESI ASAM-ASAM ORGANIK OLEH ASPERGILLUS NIGER YD 17 YANG DITUMBUHKAN DENGAN BATUAN FOSFAT Sastro, Yudi; Widianto, Donny; Shiddieq, Dja'far
Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati Vol 11, No 3 (2006): October 2006
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/biota.v11i3.2544

Abstract

Information on ability of Aspergillus niger to secrete organic acid is important in using A. niger as phosphate rock-solubilizing microorganism. This research was aimed to examine the ability of A. niger YD 17 secreting organic acid when it was grown with phosphate rock. An A. niger YD 17 was obtained from Laboratory of Microbiology, Faculty of Agriculture, GMU. The phosphate rock used was Christmas Island phosphate rock. Organic materials consisted of tapioca waste industry, rice bran, and starch. The study was conducted in Pikovskaya liquid medium and soils that were taken from Jasinga, Banten, West Java (ultisol) and Karang Jati, Ungaran, Central Java (inceptisol). The type and level of organic acid production were determined using high performance liquid chromatography (HPLC). The results indicated that A. niger YD 17 was able to secrete organic acid when it was grown with phosphate rock. The level of organic acid in the Pikovskaya liquid medium reached 255.7 ?g.ml-1, whereas in the soil reached 2992.5 ?g.g-1. Malate dominated organic acid in the Pikovskaya liquid medium, while in the soils dominated by oxalate. The type and level of organic acid secreted by A. niger YD 17 were influenced by carbon and phosphorus sources, concentration of inoculums, and characteristic of the soils.
THE GROWTH AND YIELD OF SWEET CORN FERTILIZED BY DAIRY CATTLE EFFLUENTS WITHOUT CHEMICAL FERTILIZERS IN INCEPTISOLS Sastro, Yudi; Lestari, Indarti Puji
Journal of Tropical Soils Vol 16, No 2: May 2011
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2011.v16i2.139-143

Abstract

Several research has proven the role of dairy cattle effluents in improving the growth and yield of some crops. However, its role in supporting the growth and yield of sweet corn, especialy in Inceptisols, has not been reported. The study aims to determine the effect of dairy cattle effluents on growth and yield of sweet corn in Inceptisols. The pot study was conducted in a greenhouse of the Assessment Institute for Agriculture Technology of Jakarta. The treatments were fertilization using dairy cattle effluents (without dilution, dilution with water 1:1 and 1:2), a mixtureof Urea, SP-36 and KCl (NPK), and without fertilizer. The experimental design was a completely randomized design with five replications. Compared to a without fertilizer treatment, dairy cattle effluents were significantly increased plant height (114%), leaf number (136%), cob weight (131%), cob length (124%), and cob diameters (128%). Base on cob weight, relative agronomic effectiveness (RAE) of dairy cattle effluents reached 38.4% (without dilution), 47.5% (dilution with water 1:1), and 62.1% (dilution with water 1:2).Keywords: Dairy cattle effluents, fertilizer, sweet corn
PERAN GRANULASI DAN PENGAYAAN TERHADAP PENINGKATAN EFEKTIVITAS KOMPOS PADA SAWI, SELADA, KANGKUNG, DAN BAYAM Sastro, Yudi; I krarwati, ,; Suwandi, ,
Jurnal Hortikultura Indonesia Vol. 3 No. 1 (2012): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (155.558 KB) | DOI: 10.29244/jhi.3.1.10-16

Abstract

ABSTRACTThis  study  aimed  at  determining  the  effect  of  granulation  and  compost  enrichment  to  improve  the effectivity of compost on green mustard, lettuce, kangkong, and spinach. The granulation treatments i.e without and  with  granulation  and  the  enrichment  using  microbial  cultures,  the  liquids  from  the  rock  phosphate fermentation, and the mixture of microbial cultures and the liquids from the rock phosphate fermentation were as treatments . The combinations  of treatments  were  arranged using completely  randomized  block  design with 20 replications. Variables observed were plant height, leaf number, fresh weight and dry weight. The data were analyzed using analysis of variance  and foll owed by Duncan's Multiple Range Test.  The results showed that there was no significant interaction between granulation with enrichment to improve the effectivity of compost on green mustard, lettuce, kangkong, spinach. The compost granulation treatment significantly increased the effectivity of compost on green mustard and lettuce, but not  on  kangkong and spinach. The granulation even decreased  the compost effectiveness on spinach. The compost enrichments treatments significantly increased the effectivity of compost on green mustard, lettuce and spinach. The compost enrichments using the mixture of liquid fermentation medium of rock phosphate and microbial increased yield of green mustard and lettuce up to 48.4 and 60.1% respectively, while liquid fermentation medium of rock phosphate increased yield of spinach 75.0%.Key words: compost, granulation, enrichment, vegetableABSTRAKPenelitian  ini  bertujuan  untuk  mengetahui  pengaruh  granulasi  dan  pengayaan  terhadap efektivitas kompos pada sawi, selada, kangkung, dan bayam. Perlakuan penelitian terdiri atas perlakuan granulasi,  yakni  tanpa  dan  dengan  granulasi,  dan  perlakuan  pengayaan  yang  meliputi  kultur  mikroba, cairan media fermentasi batuan fosfat, dan campuran kultur mikroba dan cairan media fermentasi batuan fosfat.   Kombinasi  perlakuan  diatur  menggunakan  Rancangan  Acak  Kelompok  Lengkap  dengan pengulangan  sebanyak  20  kali.  Peubah  pengamatan  meliputi   tinggi  tanaman,  jumlah  daun,  dan  berat segar  serta  berat  kering  tanaman.   Data  hasil  pengamatan  dianalisis  menggunakan  analisis  varian  dan dilanjutkan  menggunakan   Duncan  Multiple  Range  Test.  Hasil  penelitian  menunjukkan  bahwa  tidak terdapat  interaksi  nyata  antara  perlakuan  granulasi  dan  pengayaan  terhadap  peningkatan  efektivitas kompos  pada  sawi,  selada,  kangkung  dan  bayam.  Perlakuan  granulasi  nyata  meningkatkan  efektivitas kompos  pada  sawi  dan  selada,  namun  tidak  pada  kangkung  dan  bayam.   Perlakuan  granulasi  bahkan menurunkan efektivitas kompos pada bayam.  Pengayaan  nyata  meningkatkan efektivitas kompos pada sawi, selada, dan bayam. Pengayaan  kompos menggunakan campuran kultur mikroba dan cairan medium fermentasi  batuan  fosfat  meningkatkan  hasil  sawi  dan  selada,  masing-masing  hingga  48,4  dan  60,1%, sedangkan cairan medium fermentasi batuan fosfat meningkatkan hasil bayam sebesar 75%.Kata kunci: kompos, granulasi, pengayaan, sayuran
THE EFFECT OF ROCK PHOSPHATE AND LEVEL OF INOCULUMS ON THE SURVIVABILITY OF ASPERGILLUS NIGER AND ITS SOLUBILIZATION ABILITY WHEN PELLETED WITH ROCK PHOSPHATE Sastro, Yudi; Widianto, Donny; Prijambada, Irfan D
Jurnal Ilmu Tanah dan Lingkungan Vol 7 No 2 (2005): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (329.996 KB) | DOI: 10.29244/jitl.7.2.77-80

Abstract

The study is intended to examine the survival of Aspergillus niger and its phosphate solubilizing ability when pelletedwith rock phosphate. An A. niger YD 17 obtainedfrom the Laboratory of Microbiology. Faculty of Agriculture, Gadjah MadaUniversity was used. The pellet was made by mixing rock phosphate (80%) with organic matter (J 3. 9% waste of tapioca. 6% rice bran, and 1% starch) and spore of A. niger. The experimental design was the Complete Randomized Design 5x4 with 3 replicatiOns. The first factor was sources of rock phosphate (Christmas Island. Jordan, China, Ciamis, and Madura). The secondfactor was the number ofinoculums i.e. control without inoculums, 107 ? J(t and J(t cfu.g·'. The colony of A. niger that formed at medium of potatoes dextrose agar (PDA) and the amount of soluble phosphorus in the Pikovskaya liquid medium were parameters. Experimental results indicated that sources of rock phosphate and the number of inoculums itif1uence the A. niger survivability and its phosphorus solubilizing ability. Rock phosphate from Ciamis gave the best support for fungus survival and rock phosphate from Christmas Island was the best substrate for phosphate solubilization. The highest soluble phosphate was achieved by ul inoculums.
Pengaruh Campuran Onggok, Sekam, Pati dan Bahan Humat terhadap Pertumbuhan Aspergillus niger dan Kemampuannya dalam Melarutkan Fosfat Sastro, Yudi; Widianto, Donny; Prijambada, Irfan D.
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 23, No 3 (2006)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2006.23.3.173

Abstract

The aims of this study were to investigate the effects of the mixture of tapioca waste, rice bran, starch (BOC), and humic substance (BH) on Aspergillus niger growth and its phosphate solubilizing capability. The experiment was conducted in Erlenmeyer flask containing 200 ml Pikovskaya liquid media and incubated on shaker with 100 rotaries per minute for nine days.  The Christmas Island phosphate rock was used as phosphate source.  Aspergillus niger YD 17 was taken from the Laboratory of Microbiology, Faculty of Agriculture, Gadjah Mada University. The experiment was arranged using factorial completely randomized design with three-replications (3x4x3). The level of BOC (i.e. 0, 2, and 4 g.l-1 media)   and BH   (i.e. 0, 1, 2, and 3 ml.l-1) were applied as experimental factors. Dry weight of mycelia and the soluble phosphate in media were parameters of Aspergillus niger growth. The results showed that BOC and BH increased the Aspergillus niger growth and its phosphate solubilizing capability (P£0.05). Four-gram of BOC and 3 ml of BH per litter of media were the best level for Aspergillus niger growth, while 4 g of BOC and 2 ml of BH was the best level for phosphorus solubilization capability.
PERAN MEDIA TANAM TERHADAP PERTUMBUHAN SERTA HASIL TANAMAN KANGKUNG, SAWI, DAN SELADA DALAM SISTEM BUDIDAYA AKUAPONIK Utami, Dewi Putri; Sastro, Yudi; Nurjasmi, Reni
JURNAL PERTANIAN Vol 6, No 1 (2015): Jurnal Ilmiah RESPATI
Publisher : JURNAL PERTANIAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (423.323 KB)

Abstract

 Salah satu strategi optimasi pemanfaatan pekarangan adalah melalui sistem budidaya tanaman yang dipadukan dengan budidaya ikan atau disebut “akuaponik”.  Pada sistem ini, dengan luasan lahan yang sama maka akan dapat dihasilkan dua komoditas sekaligus, yakni sayuran dan ikan. Media tanam merupakan salah satu faktor penentu keberhasilan budidaya sayuran dalam sistem akuaponik, oleh sebab itu pemilihan jenis media tanam sangat penting untuk dapat menghasilkan produk tanaman yang di inginkan. Namun demikian belum ada penelitian mengenai jenis formulasi media tanam yang dikembangkan dalam sistem mini akuaponik sesuai untuk pekarangan. Penelitian bertujuan untuk mempelajari peran media tanam terhadap pertumbuhan dan hasil tanaman kangkung, sawi, selada dalam sistem budidaya akuaponik. Penelitian ini dilaksanakan di Balai Pengkajian Teknologi Pertanian (BPTP) DKI Jakarta pada  Bulan Maret hingga juni 2013.Perlakuan meliputi campuran media tanam sekam kascing (1:1) dan campuran zeolit kascing (1:1). tiap perlakuan diulang sebanyak lima kali, masing- masing ulangan terdiri dari sepuluh  sampel tanaman. Perlakuan di uji dengan tiga jenis tanaman yaitu kangkung darat, sawi hijau, dan selada keriting (betawi). Rancangan yang digunakan dalam penelitian ini adalah Rancangan Acak Kelompok (RAK). Peubah pengamatan terdiri dari tinggi tanaman, jumlah daun tanaman , diameter batang tanaman, dan berat hasil panen per tanaman. Hasil penelitian bahwa media yang diujikan menunjukan perbedaan yang nyata terhadap pertumbuhan dan hasil sawi dan selada. Sementara itu, pada kangkung tidak terdapat perbedaan yang nyata antara campuran media tanam sekam zeolit  dengan campuran media tanam zeolit sekam. Terlihat bahwa media tanam campuran zeolit kascing (1:1) lebih unggul dibandingkan media campuran sekam kascing (1:1).         Kata Kunci : Akuaponik, zeolit, sekam,kangkung, sawi, selada
PENGARUH INOKULASI CACING (Eisenia fetidae), PENCACAHAN, DAN INOKULASI MIKROBA TERHADAP KUALITAS PUPUK ORGANIK BERBAHAN BAKU SAMPAH PASAR Beruh, Tri Widiyantoro; Sastro, Yudi; H.T, R. Notarianto
JURNAL PERTANIAN Vol 6, No 2 (2015): Jurnal Ilmiah RESPATI
Publisher : JURNAL PERTANIAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (609.617 KB)

Abstract

Tujuan penelitian untuk mengetahui pengaruh inokulasi cacing, pencacahan dan inokulasi mikroba terhadap kualitas pupuk organik berbahan baku sampah pasar. Metode penelitian Rancangan Acak Lengkap Faktorial (2 x 2 x 2) dengan 8 perlakuan, setiap perlakuan terdiri dari 3 ulangan sehingga berjumlah 24 kondisi perlakuan. Faktor pertama adalah pengaruh inokulasi cacing, terdiri atas : inokulsi cacing dan tanpa inokulasi cacing. Faktor kedua adalah pengaruh pencacahan, terdiri atas : pencacahan dan tanpa pencacahan. Faktor ketiga adalah pengaruh inokulasi mikroba, terdiri atas : inokulasi mikroba dan tanpa inokulasi mikroba. Hasil penelitian menunjukkan bahwa perlakuan TWTCI secara keseluruhan memberikan respon yang tertinggi terhadap kualitas pupuk kompos berbahan baku sampah pasar. Perlakuan TWTCTI menunjukan pH tertinggi yaitu 8,70. Perlakuan TWTCI menunjukan C Organik tertinggi yaitu 10,16. Perlakuan TWTCI menunjukan N Organik, NH4, NO3 dan N total tertinggi yaitu 1,05. Perlakuan WTCI menunjukan C/N tertinggi yaitu 14,67. Perlakuan TWTCI menunjukan P2O5 tertinggi yaitu 0,48. Perlakuan TWTCI menunjukan K2O tertinggi yaitu 1,50. Perlakuan TWTCI menunjukan KTK tertinggi yaitu 16,00 cmol(+)/kg. Kata kunci : inokulasi cacing, pencacahan, inokulasi mikroba dan kualitas pupuk
PENGARUH BAHAN ORGANIK DAN SUHU PENGERINGAN TERHADAP KETAHANAN HIDUP ASPERGILLUS NIGER DALAM PUPUK PELET BIO-FOSFAT Sastro, Yudi; Widianto, Donny; Prijambada, Irfan D.
Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati Vol 12, No 2 (2007): June 2007
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/biota.v12i2.2667

Abstract

This research was aimed to investigate the effect of organic matter and drying temperature on Aspergillus niger survivability in the rock phosphate pellet fertilizer namely bio-phosphate. The research was arranged by a completely randomized design 3x3x6. Addition of the mixing of tapioca waste, rice bran, and starch (BOC) and the humic substance (BH) in the bio-phosphate, and its drying temperature (SP) were the treatments. Aspergillus niger inoculums survivability in the bio-phosphate was determined using plating methods. The result showed that the addition of BOC decreased amount of A. niger in the bio-phosphate up to 28.0%, while the BH increased the amount of A. niger up to 24.4%. The ideal drying temperature of bio-phosphate pellet fertilizer was 600C.
CENDAWAN ENDOFIT YANG POTENSIAL MENINGKATKAN KETAHANAN CABAI MERAH TERHADAP PENYAKIT LAYU BAKTERI Irawati, Ana Feronika Cindra; Sastro, Yudi; Sulastri, Sulastri; Suhartono, Maggy Tenawidjaja; Mutaqin, Kikin Hamzah; Widodo, Widodo
Jurnal Fitopatologi Indonesia Vol 12 No 4 (2016)
Publisher : The Indonesian Phytopathological Society (Perhimpunan Fitopatologi Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (273.349 KB) | DOI: 10.14692/jfi.12.4.133

Abstract

Ralstonia solanacearum has been known to cause bacterial wilt disease on chili pepper.  Despite many reports on the potential use of endophytic fungi to induce plant resistance, its utilization to suppress bacterial wilt disease of chili has not been widely reported.  The aims of this research was to screen potential endophytic fungi that may increase chili resistance against bacterial wilt disease.  Selection of endophytic fungi was done using in vivo and antibiosis test. Strains of fungi were considered the most potent in suppressing the development of bacterial wilt in chilli were identified. Ten out of 62 isolates of endophytic fungi gave the highest suppression on chilli?s bacterial wilt disease.  Most strains of endophytic fungi were able to suppress the development of bacterial wilt disease, but not always positively correlated to the vegetative and generative growth of chilli. Based on the level of disease intensity and the growth of plants were obtained three strains of endophytic fungi that considered potentially suppress the incidence of bacterial wilt disease.  The three isolates was identified as Fusarium solani f.sp. phaseoli (AC-2.13 and AC-4.4) and Trichoderma asperellum (AC-3.18) using morphology and molecular characters. Although all three selected isolates were able to suppress bacterial wilt disease in this study, but application of F. solani f.sp. phaseoli should be considered in practical use since it is generally known as the causal agent of root rot disease of beans