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All Journal MEDIA PETERNAKAN - Journal of Animal Science and Technology
W D Astuti
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Agriculture, Biological Sciences & Forestry

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Penggunaan Kromium Organik dari Beberapa Jenis Fungi terhadap Aktivitas Fermentasi Rumen Secara in Vitro W D Astuti; T Sutardi; D Evvyernie; T Toharmat
Media Peternakan Vol. 29 No. 3 (2006): Media Peternakan
Publisher : Faculty of Animal Science, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (69.441 KB)

Abstract

Chromium appears to be an essential trace element since 1959, but its effect on ruminal microbes is not clear yet. This experiment was conducted to study the effects of organic chromium supplementation on rumen fermentation activity. An in vitro technique was held using randomized block design with 13 treatments and 3 replications. There were four kinds of organic Cr used, produced with four different species of fungi as carriers. Fungi used as carriers were Saccharomyces cerevisiae, Aspergillus oryzae, Rhizophus oryzae and "ragi tape". The result indicated that the optimum organic Cr supplementation was 1 mg organic Cr/kg dry matter. Supplementation of 1 mg organic Cr/kg dry matter increased dry matter and organic matter digestibilities. It also tended to increase NH3 and total VFA production. Propionate production increased, which decreased methane production and increased hexose conversion efficiency in several treatments. Each fungus used as carrier of organic Cr resulted in different effects on rumen fermentation activity, but the effects was within a normal range. It was concluded that either Saccharomyces cerevisiae, Aspergillus oryzae, Rhizophus oryzae or "ragi tape" could be used as carrier in organic Cr production. Key words : organic Cr, ruminal microbes, Saccharomyces cerevisiae, Aspergillus oryzae, Rhizophus oryzae, "ragi tape"
Inkorporasi Kromium pada Khamir dan Kapang dengan Substrat Dasar Singkong yang Diberi Kromium Anorganik W D Astuti; T Sutardi; D Evvyernie; T Toharmat
Media Peternakan Vol. 29 No. 2 (2006): Media Peternakan
Publisher : Faculty of Animal Science, Bogor Agricultural University

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Abstract

Organic-chromium (Cr) has higher availability for animals than inorganic-Cr sources. One of organic-Cr sources known is fungi contained high Cr. This organic-Cr was incorporated to fungi protein. Information about the best fungi or microorganisms used in organic-Cr production is still limited. The objective of this experiment was to study organic-Cr production using different kinds of fungi as Cr carrier. Organic-Cr production was conducted in a 4x3 factorial completely randomized experimental design with 3 replications. Four fungi used as carriers in organic-Cr production as the first factor were Saccharomyces cerevisiae, Aspergillus oryzae, Rhizopus oryzae and "ragi tape". The second factor was levels of Cr addition (500, 1000, 1500 mg/kg). Addition of 1000 mg Cr/kg substrate gave the highest Cr incorporation to fungi protein (484 mg/kg) and Cr incorporation efficiency (21.1%). The best fungi used as carrier in organic-Cr production was Rhizopus oryzae which gave the highest Cr incorporation (488 mg/kg) and incorporation efficiency (24.7%). Key words: organic-Cr, production, Saccharomyces cerevisiae, Aspergillus oryzae, Rhyzopus oryzae, "ragi tape"
Quality of Vegetable Waste Silages Treated with Various Carbohydrate Sources W D Astuti; Y Widyastuti; R Ridwan; E Yetti
Media Peternakan Vol. 36 No. 2 (2013): Media Peternakan
Publisher : Faculty of Animal Science, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1947.185 KB) | DOI: 10.5398/medpet.2013.36.2.120

Abstract

The aim of this research was to evaluate the quality of vegetable waste silages, using rice bran, onggok (cassava flour waste) and pollard as carbohydrate sources. Vegetable waste was collected from local traditional market, consisted of corn husk, chinese cabbage and cabbage. Research was held in randomized block design consisted of six treatments with 3 replications. Treatments were (T1) vegetable waste + rice bran, (T2) vegetable waste + rice bran + rice straw, (T3) vegetable waste + onggok, (T4) vegetable waste + onggok + rice straw, (T5) vegetable waste + pollard, (T6) vegetable waste + pollard + rice straw. Lactobacillus plantarum 1A-2 was used as innoculant. The quality of silages was evaluated by measuring pH, temperature, population of lactic acid bacteria and lactic acid production. Nutrient characteristic was determined by proximate and fiber analysis. Results showed that pH of silages were not affected by treatments, but silage treated with rice bran, with or without rice straw addition, had higher temperature compared with others (29 oC or 28.3 oC). The highest population of lactic acid bacteria (1.65 x 109 cfu/g) was found in silage using rice straw and onggok (T4), but the highest lactic acid production (0.41%) was measured in silage using rice straw and rice bran (T2). In general, the use of rice bran as carbohydrate sources gave the highest lactic acid production followed by pollard and onggok. Different carbohydrate source gave different nutrients characteristic. Although the result was not significantly different, silage with highest protein content was measured in silage with pollard as carbohydrate source, followed with rice bran and onggok. The result showed that all carbohydrate sources used in this experiment can be used as silage ingredient resulting in good vegetable waste silage.
Co-Authors Dwierra Evvyernie E Yetti R Ridwan T Sutardi T Toharmat Y Widyastuti