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All Journal Sodality: Jurnal Sosiologi Pedesaan Journal of Tropical Soils Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati AGRIVITA, Journal of Agricultural Science Buletin Peternakan Tropis (Bulletin of Tropical Animal Science)
Yudi Sastro
Balai Pengkajian Teknologi Pertanian Jakarta Jl.Raya Ragunan No.30 Pasar Minggu, Jakarta Selatan
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Environmental Science Social Sciences

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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 | Full PDF (183.053 KB) | 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.
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 | Full PDF (446.464 KB) | 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.
Peran Modal Sosial dalam Pengembangan Ternak Sapi Potong Rakyat di Bengkulu Ishak, Andi; Ramon, Erpan; Efendi, Zul; Wulandari, Wahyuni Amelia; Kusnadi, Harwi; Fauzi, Emlan; Sastro, Yudi
Sodality: Jurnal Sosiologi Pedesaan Vol. 8 No. 3 (2020): Sodality: Jurnal Sosiologi Pedesaan
Publisher : Departement of Communication and Community Development Sciences, Faculty of Human Ecology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22500/8202034481

Abstract

Pengembangan peternakan sapi potong rakyat terus diupayakan pemerintah melalui berbagai program untuk mengurangi impor daging sapi dan meningkatkan pendapatan peternak. Penelitian ini bertujuan untuk menguraikan peran modal sosial pada tingkat kelompok tani dalam pengembangan populasi ternak sapi potong rakyat di Bengkulu. Penelitian dilakukan pada bulan Agustus sampai dengan Desember 2020 dengan metode wawancara mendalam pada 3 kelompok tani penerima bantuan ternak sapi potong dari Dinas Peternakan dan Kesehatan Hewan Provinsi Bengkulu. Identifikasi modal sosial (norma, kepercayaan, dan jaringan) yang mempengaruhi pengembangan populasi ternak dan peningkatan kapasitas kelompok tani dianalisis secara deskriptif menggunakan model interaktif. Hasil penelitian menunjukkan bahwa modal sosial memiliki peran penting dalam pengembangan kapasitas kelompok mengelola bantuan ternak dari pemerintah, yaitu: (1) norma penggaduhan ternak dengan sistem bagi hasil menyebabkan peningkatan populasi ternak milik kelompok, (2) kepercayaan anggota kelompok tani dipengaruhi ikatan-ikatan sosial dalam kelompok tani dan peran ketua kelompok, (3) jaringan kerjasama yang baik dalam kelompok tani meningkatkan modal sosial dan pengembangan populasi ternak.
Nutrient Uptake of Paddy with Peat Humic Substance Application on Tidal Swamp Yartiwi, Yartiwi; Ghulamahdi, Munif; Sulistyono, Eko; Lubis, Iskandar; Sastro, Yudi
AGRIVITA Journal of Agricultural Science Vol 47, No 2 (2025)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v47i2.3889

Abstract

Numerous initiatives were carried out to enhance rice production in swampy areas, which required the implementation of suitable technology. The use of adaptive variety, soil, and water management have been reported as the main keys to agricultural culture on tidal swamps. Therefore, this study was conducted to analyze the effect of several levels of substance peat humic application on the growth and yield of rice in tidal swamps. A completely randomized design was also used with two factors and four replications between March to June 2022, in Karya Bakti, Rantau Rasau sub-district of Tanjabtim District, Jambi Province. The first factor was varieties IR-64 and Inpara-4, while the second was the use of humic substance in peat consisting of 0 g/plant, 0.04 g/plant, 0.08 g/plant, and 0.12 g/plant. The cultivation process included the planting of paddy seeds within buckets containing 10 kg of soil. The result showed that the optimal yield of rice varieties IR-64 and Inpara-4, when subjected to peat humic substance in saturated soil culture, was achieved at 0.12 g/plant. This was substantiated by the enhanced uptake of essential nutrients such as N, P, and K in the plants, resulting in superior plant biomass compared to other concentration levels.
Pemanfaatan Limbah Kelapa Sawit (Solid) sebagai Substitusi Jagung dalam Ransum Ayam Merawang Efendi, Zul; Ramon, Erpan; A. Wulandari, Wahyuni; Sastro, Yudi; Nurhaita, Nurhaita
Buletin Peternakan Tropis Vol. 1 No. 2 (2020)
Publisher : BPFP Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/bpt.1.2.48-53

Abstract

Penelitian ini Penelitian dilaksanakan di kandang ternak Balai Pengkajian Teknologi Pertanian Bengkulu pada Bulan Agustus - Desember 2018. Penelitian ini bertujuan untuk mengevaluasi pengaruh pemberian limbah kelapa sawit (solid) fermentasi didalam pakan terhadap performan ayam Merawang pada masa pertumbuhan (2-4 bulan). Rancangan yang digunakan adalah Rancangan Acak Lengkap dengan empat perlakuan dan lima ulangan. Sebagai perlakuan pertama (p1): dedak padi 40%, jagung giling 40% dan konsentrat 20%, perlakuan kedua (p2): dedak padi 40%, jagung giling 37,5%, konsentrat 20% dan solid 2,5%, perlakuan ketiga (p3): dedak padi 40%, jagung giling 35,0%, konsentrat 20% dan solid 5%, perlakuan keempat (p4): dedak padi 40%, jagung giling 32,5%, konsentrat 20% dan solid 7,5%. Ayam yang digunakan adalah ayam Merawang berumur 2 bulan sebanyak 100 ekor, setiap perlakuan terdapat sebanyak 25 ekor. Hasil penelitian menunjukkan bahwa penggunaan limbah solid berpengaruh tidak nyata (p>0,05) terhadap performan ayam kampung (Merawang) pada masa pertumbuhan. Limbah kelapa sawit berupa solid fermentasi dapat digunakan dalam ransum ayam kampung (Merawang) pada periode umur 2 s/d 4 bulan sebagai pengganti jagung giling sampai 7,5% di dalam ransum tanpa mempengaruhi performan ayam Merawang. 
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
Co-Authors A. Wulandari, Wahyuni Donny Widianto Efendi, Zul Eko Sulistyono Emlan Fauzi, Emlan Harwi Kusnadi Indarti Puji Lestari, Indarti Puji Irfan Dwidya Prijambada Ishak, Andi Iskandar Lubis Munif Ghulamahdi Nurhaita Nurhaita Ramon, Erpan Shiddieq, Dja'far Wulandari, Wahyuni Amelia Yartiwi, Yartiwi