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Articles by Ristianto Utomo
Total Records ( 5 ) for Ristianto Utomo
  Paulus Klau Tahuk , Subur Priyono Sasmito Budhi , Panjono , Nono Ngadiyono , Ristianto Utomo , Cuk Tri Noviandi and Endang Baliarti
  Objective: The study was aimed to determine the effect of different protein level toward the growth performance of male Bali cattle fattened in smallholder farms. Materials and Methods: The male Bali cattle used were 18 heads aged 2-2.5 years with initial body weight of 229.86±12.46 kg. The cattle were randomly divided into three treatment groups. The group of T0 given feed in accordance traditional practices of fattening cattle by farmers, T1 group given ration of 12% Crude Protein (CP) and 72% Total Digestible Nutrients (TDN) and T2 group given ration of 15% CP and 72% TDN. The cattle were fed individually for 90 days and drinking. The data collected were analyzed by one-way analysis of variance. Results: The results showed that the intake of Dry Matter (DM), CP, Crude Fiber (CF) and TDN of T1 was higher (p<0.05) from T2 and T0. Similarly, T2 group was higher than T0. The digestibilities DM and CF of group T1 and T2 did not significant but were higher (p<0.05) than T0, while the digestibility of CP of T0, T1 and T2 were not significant. The daily body weight gain of T0 and T2 were not significant but lower (p<0.05) than T1, while the Feed Conversion Ratio (FCR) were not significantly different among the group cattle. Conclusion: The traditional practices of male Bali cattle fattened on smallholder farms did not have a positive impact on improving the performance of the cattle. Male Bali cattle fattening fed ration with composition of 12% CP and 72% TDN showed intake, nutrient digestibility and growth performance that was higher compared to the other treatments. The use of ration with 15% CP and 72% TDN had no positive effect on the cattle performance. Paying attention to balancing and adequacy of protein and energy of feed was an important factor, because it proved can be improving performance of the male Bali cattle fattened in smallholder farms.
  Bambang Suwignyo , Zein Ahmad Baihaqi , Ristianto Utomo , Sarmin and Irkham Widiyono
  Objective: This study aimed to determine the effects of different feed restrictions and refeeding on feed intake, digestibility, body weight gain and feed cost in goats. Materials and Methods: There were three treatment groups of goats had an average initial body weight of 20-25 kg. Control goats (R0) were fed 3.5% Dry Matter (DM) of body weight or underwent 1 month of feed restriction treatment (R1) and 2 months (R2) of 60% restrictions (DM base). After the restriction period, R1 and R2 groups were fed ad libitum. The variables measured include Dry Matter Intake (DMI), Organic Matter Intake (OMI), Crude Protein Intake (CPI), body weight gain, Dry Matter Digestibility (DMD), Organic Matter Digestibility (OMD), Crude Protein Digestibility (CPD) and feed cost. Data were analyzed using ANOVA based on a Completely Randomized Design (CRD) on SPSS program version 21 for windows. Results: Feed restriction had a significant effect on body weight gain, the DMI, OMI, CPI and feed cost. However, the treatments did not significantly affect body weight or DM, OM and CP digestibility. Conclusion: One month of feed restriction continued with 2 months of re-feeding (R1) can lead to compensatory growth such that the average daily gain is the highest.
  Engkus Ainul Yakin , Zaenal Bachruddin , Ristianto Utomo and Ria Millati
  Objective: The study was conducted to determine the effect of manganese (Mn2+) addition on cocoa pod fermentation using Phanerochaete chrysosporium Pc2804. The enzyme activities of LiP and MnP, as well as the fiber fraction and digestibility of the cocoa pod, were evaluated. Methodology: The treatments were as follows: T1 = Cocoa pod fermentation without Mn2+, T2 = Cocoa pod fermentation with the addition of 200 μg Mn2+ g–1 substrate, T3 = Cocoa pod fermentation with the addition of 400 μg Mn2+ g–1 substrate, T4 = Cocoa pod fermentation with the addition of 600 μg Mn2+ g–1 substrate and T5 = Cocoa pod fermentation with the addition of 800 μg Mn2+ g–1 substrate. The observed variables were LiP and MnP activity, analysis of the fiber fraction including NDF, Acid Detergent Fiber (ADF), lignin, cellulose and hemicellulose and an analysis of in vitro digestibility. Results: The results showed that the addition of 600 μg Mn2+ g–1 substrate to cocoa pod fermentation with Phanerochaete chrysosporium produces the highest LiP and MnP activities: 0.199±0.00 and 0.098±0.00 U mL–1, respectively (p<0.05). The addition of 600 μg Mn2+ g–1 substrate to cocoa pod fermentation with Phanerochaete chrysosporium Pc2804 causes a decrease in NDF (75.83±0.78%), ADF (67.49±0.41%), lignin (25.27±0.41%), hemicellulose (8.34±1.05%) and cellulose (31.53±0.68%) (p<0.05). The addition of 600 μg Mn2+ g–1 substrate to cocoa pod fermentation with Phanerochaete chrysosporium Pc2804 produced the highest DM digestibility, which was 70.86±0.22% and the highest OM digestibility, which was 70.47±0.47% (p<0.05). Conclusion: The conclusion of this study is that the addition of 600 μg Mn2+ g–1 substrate to cocoa pod fermentation with Phanerochaete chrysosporium Pc2804 gives the best digestibility of the cocoa pod.
  Ristianto Utomo , Cuk Tri Noviandi , Subur Priyono Sasmito Budhi , Ali Agus and Aryo Mufti Prananda
  Background and Objective: This experiment was conducted to determine the effect of pelleting on quality and storability of ceara rubber (Manihot glaziovii) leaves. Materials and Methods: Following a 2×4 factorial experimental design, ground or pelleted ceara rubber leaves were stored for 4, 6, 8 and 12 weeks. In the pelleting process, 15% DM cassava starch was added as a binder. Both ground and pelleted ceara rubber leaves were stored for 4, 6, 8, or 12 weeks in plastic bags. In the end of each period, nutritive quality of ceara rubber leaves was evaluated. Result: Pelleting the ceara rubber leaves decreased (p<0.01) the crude protein (from 21.7-19.7%) and total carotene (from 84.6-61.5 mg/100 g DM) contents. The crude protein content was not affected by the storage periods but a decrease (p<0.01) in the total carotene content after 12 weeks of storage was noticed. Conclusion: The pelleting with 15% DM cassava starch decreased the crude protein and total carotene contents of ceara rubber leaves but the storing period did not greatly affect those properties.
  Engkus Ainul Yakin , Zaenal Bachruddin , Ristianto Utomo and Ria Millati
  Background and Objective: This study aimed to determine the effect of cocoa pod fermented by Phanerochaete chrysosporium with the addition of 600 μg Mn2+ g1 substrate on the performance of the Javanese thin-tailed sheep. Materials and Methods: Twelve Javanese thin-tailed sheep with body weights of 15-17 kg were put into individual cages that were equipped with feed and drink containers. The study used a completely randomized design in a unidirectional pattern, with three treatments and four replications. The treatments involved the use of cocoa pod fermented by Phanerochaete chrysosporium with the addition 600 μg Mn2+ g1 substrate as thin-tailed sheep feed. The treatments were T1 = 40% concentrate+60% forage, T2 = 40% concentrate +42% forage +18% fermented cocoa pod and T3 = 40% concentrate +18% forage +42% fermented cocoa pod. Rations were prepared for a crude protein determination of 12%. Observed variables included dry matter intake, average daily gain (ADG) and feed conversion ratio. Results: The results showed that feeding Javanese thin-tailed sheep cocoa pod fermented by Phanerochaete chrysosporium with the addition of 600 Mn2+ g1 substrate produced the highest DM, OM and CP consumption with a composition of 40% concentrate +18% grass +42% fermented cocoa pod, at 1030.85±1.30, 672.26±0.89 and 123.80±0.99 g head1 day1, respectively (p<0.05). The highest DM, OM and CP in vivo digestibility was obtained with 40% concentrate +18% grass +42% fermented cocoa pod (67.69±0.50%, 66.33±0.54% and 60.05±0.66%, respectively). The highest average daily gain (145.46±1.05 g head1 day1) was obtained with 40% concentrate +18% grass +42% fermented cocoa pod. The lowest feed conversion ratio (7.39±0.08) was obtained with 40% concentrate +18% grass +42% fermented cocoa pod (p<0.05). Conclusion: It can be concluded that cocoa pod fermented by Phanerochaete chrysosporium with the addition of 600 μg Mn2+ g1 substrate can be used to substitute for up to 42% of dietary composition for Javanese thin-tailed sheep.
 
 
 
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