<![CDATA[This research aim was to determine the optimum dose of vitamin C L-Ascorbyl-2-Phosphate Magnesium in the feed of peres fish (Osteochilus vittatus). The completely randomized design (CRD) with 7 treatments and three replicates were used in this study. The tested treatment is the differences dosage of vitamin C L-Ascorbyl-2-Phosphate-Magnesium (L-AP-Mg) supplemented in experimented diet containing 30% protein, the tested dosages of vitamin C were 0 (control), 50, 100, 150, 200 250, 300 mg/kg of feed. The fish were fed three times a day on 08:00, 12:00, and 17:00 pm for 60 days. The result showed the weight gain ranged between 0.28 g - 0.57 g, the specific growth rate ranged from 1.12% - 2.19% per day, daily growth rate ranged from 0.31 g / day –to 1.15 g / day, and the survival rate ranged from 76% - 97.33%. The highest values for all parameters were found at the dosage of 300 mg / kg of feed. The ANOVA test showed that the differences of vitamin C gave a significant effect on weight gain, specific growth rate, daily growth rate, feed conversion ratio, feed efficiency, and survival rate of the peres fish (P0.05). Based on the Duncan test showed that the highest weight gain, specific growth rate, daily growth rate, feed efficiency, feed conversion ratio and survival rate were found at the dosage of 300 mg / kg feed. In general, the growth of peres fish seed (O. vittatus) which were given vitamin C in their feed was higher than those that were not contained vitamin C. Penelitian ini bertujuan untuk menentukan dosis optimum vitamin C L-Ascorbyl-2-Phosphate Magnesium dalam pakan untuk benih ikan peres (Osteochilus vittatus). Metode yang digunakan pada penelitian ini adalah eksperimental dengan model Rancangan Acak Lengkap (RAL) non faktorial, dengan 7 taraf perlakuan dan masing-masing 3 kali ulangan. Faktor yang di uji adalah perbedaan dosis vitamin C jenis L-Ascorbyl-2-Phosphate-Magnesium (L-AP-Mg) dalam pakan ekperimen yang mengandung 30% protein. Perlakuan yang diuji adalah perlakuan dosis vitamin C 0, 50, 100, 150, 200 250, 300 mg/kg pakan. Pakan diberikan 3 kali sehari (08.00, 12.00, dan 17.00 WIB) selama 60 hari. Hasil penelitian menunjukkan bahwa pertambahan bobot berkisar antara 0,28 g – 0,57 g, laju pertumbuhan spesifik berkisar 1,12 % perhari – 2,19 % perhari, laju pertumbuhan harian berkisar 0,31 g/hari – 1,15 g/hari, dan tingkat kelangsungan hidup berkisar 76% - 97,33%. Nilai tertinggi untuk semua parameter yang di ukur dijumpai pada perlakuan 300 mg/kg pakan. Hasil uji ANOVA menunjukkan bahwa pemberian dosis vitamin C yang berbeda dalam pakan berpengaruh nyata terhadap pertambahan bobot, laju pertambahan spesifik, laju pertumbuhan harian, dan kelangsungan hidup benih ikan peres (P0,05). Berdasarkan hasil uji lanjut Duncan menunjukkan pertambahan bobot, laju pertambahan spesifik, laju pertumbuhan harian tertinggi dijumpai pada perlakuan dosis vitamin C 300 mg/kg pakan. Berdasarkan hasil penelitian yang telah dilakukan, pemberian dosis vitamin C dalam pakan memberikan hasil lebih baik berbanding tanpa vitamin C. Dosis vitamin C terbaik adalah 300 mg/kg pakan.]]>
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