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      In Vitro Fermentation Characteristics of Ration Containing 50% Protein Based Urea and Supplemented with Chromium or Cobalt

      Karakteristik Fermentasi In Vitro Ransum Mengandung 50% Protein Asal Urea yang Disuplementasi Kromium atau Kobalt

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      Date
      2012
      Author
      Januari, Dhiki Mardiana
      Toharmat, Toto
      Sukria, Heri Ahmad
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      Abstract
      Urea is one of non protein nitrogen (NPN) source usually added in ruminant diet as nitrogen source for the formation of microbial protein. Chromium (Cr) and Cobalt (Co) are essential mineral for rumen microbe, therefore to achieve optimum utilization of urea is needed micro elements. Dietary micro minerals indicates a narrow range between toxicity and deficiency level. Therefore there are many factors dictating the status of the micro mineral. Micro-mineral supplementation in organic forms reduces the interaction effects among minerals. The purpose of research was to evaluate the effect of Cr and Co supplementation on fermentation charactyeristics of a diet containing 50% protein based urea. The data obtained by descriptive explanation. The result showed that the concentration of N-NH3 was not different among treatments. Dietary supplementation of Cr organic improved ruminal fermentability and dietary urea utilization of the ration resulted in the increase in dry and organic matter digestibility. The conclusion was Cr organic supplementation improved ruminal fermentability and dietary urea utilization of the ration resulted in the increase in dry and organic matter digestibility.
       
      Urea merupakan salah satu contoh nitrogen bukan protein (NBP) yang biasanya ditambahkan pada pakan ruminansia sebagai sumber nitrogen untuk pembentukan protein mikroba, namun untuk mencapai utilisasi yang optimum dari urea diperlukan unsur mikro seperti kromium (Cr) dan kobalt (Co). Unsur Cr essensial bagi mikroba rumen karena merupakan komponen GTF (glucose tolerance factor) yang dapat meningkatkan pengambilan glukosa dari lingkungannya dan dapat menurunkan efek negatif antibakteri. Bakteri rumen menggunakan Co dalam sintesis vitamin B12. Dalam struktur molekul vitamin B12 yang kompleks, Co berada pada pusat dari cincin tetra-ring porphryn. Pada sel mamalia, vitamin B12 berfungsi sebagia kofaktor enzim methylmalonyl-CoA mutase dalam mengkonversi methylmalonyl-CoA menjadi succinyl-CoA yang merupakan intermediat dalam produksi asam propionat. Mineral mikro memiliki kisaran kadar dalam ransum antara keracunan dan kekurangan yang sangat sempit sehingga interaksinya dengan minneral lain sangat menentukan kecukupan mineral tersebut. Suplementasi mineral mikro dalam bentuk organik dapat mengurangi pengaruh negatif adanya interaksi dengan mineral lain.
       
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      http://repository.ipb.ac.id/handle/123456789/61297
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