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All Journal MEDIA PETERNAKAN - Journal of Animal Science and Technology Jurnal Ilmu Pertanian Indonesia Jurnal Keteknikan Pertanian
. Erizal
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Agriculture, Biological Sciences & Forestry

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Design of Stocking Density of Broilers for Closed House in Wet Tropical Climates A Yani; H Suhardiyanto; . Erizal; B P Purwanto
Media Peternakan Vol. 37 No. 1 (2014): Media Peternakan
Publisher : Faculty of Animal Science, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (772.543 KB) | DOI: 10.5398/medpet.2014.37.1.17

Abstract

The objectives of this research were to: 1) design the stocking density of broiler reared at a closed house system in wet tropical climates based on the heat released by broiler, 2) design broiler harvesting system based on the housing heat load, and 3) design required housing area based on the broiler age. The housing design used to determine the broiler stocking density was based on Computational Fluid Dynamics (CFD) with Solid Works Flow Simulation software. The method had good validation shown by small number of average percentage of deviation (6.07%). Simulation was carried out by changing the number of broilers i.e. 16, 18, 20, 21 and 22 birds/m2. According to the CFD simulation result, total heat load inside the house was 233.33 kW at 21 birds/m2 at weight 1.65 kg/bird. At that stocking density the housing can be occupied by 27,224 birds until 22 days of age. The highest total weight was produced by daily harvesting started from 22 to 32 d. It can be concluded that the stocking density of closed house for broiler is 34.65 kg/m2, total production is 45,717 kg per period and the required area for 27,224 broilers is  248.63 m2 (1 to 7 days of age broiler), 562.52 m2 (8 to 14 days of age broiler) and 1,000 m2 (15 to 22 days of age broiler). Key words: broiler, computational fluid dynamics, stocking density, total heat
Pengaruh pemberian bahan organik pada tanah liat dan lempung berliat terhadap kemampuan mengikat air Yazid Ismi Intara; Asep Sapei; . Erizal; Namaken Sembiring; M. H. Bintoro Djoefrie
Jurnal Ilmu Pertanian Indonesia Vol. 16 No. 2 (2011): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (808.618 KB)

Abstract

Amount of water that obtained soil depend on soil ability to quick absorp and continue water accepted from soil surface. Water holding capacity of soil are influenced by soil texture and organic matter. The purpose of th is research was to study soil water holding capacity on two textures of soils l.e. clay, and clay loam by organic matter application of chicken manure and compost. Those treatments were control, combined of chicken manure different texture soils, and combined of compost different texture soil. Chicken manure and compost application consisted of two levels of 30 9 5 kg-l soil texture and 50 9 5 kg-l soil texture, respectively. Soil texture consisted of two kinds l.e, clay, and clay loam. The research was analyzed according to descriftive method. Result of this research indicated that the highest available water capacity of 17.352 % was given by combined t reatment of 50 9 compost of 5 kg clay textured soils. The lowest evaporation rate had occur at clay texture soils.
Particle Size Effect in Model Retaining Wall on Passive Mode with Granular Material . Erizal; Toshinori Sakai
Jurnal Keteknikan Pertanian Vol. 14 No. 2 (2000): Buletin Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.014.2.%p

Abstract

This paper presented a particle size effect on model retaining wall by comparing the experimental and finite element analysis. The experiments were conducted with air-dried Toyoura sand and Soma sand plane strain condition, both sand are standard sand in Japan. The wall was oved horizontally into sand. The hights of sand mass in these experiments were 5 cm, 10 cm, and 15 cm. The finite element analysis employed a constitutive model in which non-associated strain hardening-softening elasto-plastic materila was employed. This analysis introducted the effect of shear band thickness. The result obtained from the finite element analysis showed a good agrement with the results obtained from the experimental investigation. From both experimental and analytical results, there was evident of particle size effect due to shear banding.
Co-Authors A Yani Asep Sapei B P Purwanto H Suhardiyanto Muhammad Hasjim Bintoro Djoefrie Hasjim Bintoro Djoefrie Namaken Sembiring Toshinori Sakai Yazid Ismi Intara