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Articles by Anuraga Jayanegara
Total Records ( 5 ) for Anuraga Jayanegara
  Caribu Hadi Prayitno , Suwarno , Agus Susanto and Anuraga Jayanegara
  Background and Objective: The objective of this study was to evaluate supplementation of garlic (Allium sativum) extract and organic minerals (1.5 ppm organic Cr, 0.3 ppm organic Se and 40 ppm Zn-lysinat) on milk yield, milk quality and feed digestibility of lactating dairy cows. Materials and Methods: Fifteen multiparous, one month pre-partum Friesian Holstein cows with an average body weigth of 638±72 kg were used as the experimental units and therefore, there were 5 replicates for each treatment. The cows were fed with a Total Mixed Ration (TMR) consisted of Napier grass: Concentrate mixture (60:40 w/w, dry matter basis) as the basal diet. The experiment was conducted with three treatments, namely control feed (CTL), control feed+Organic Minerals (OM) and OM+garlic extract (OM-G). Variables measured were nutrient intake, nutrient digestibility, milk yield and milk composition. Data were analyzed by analysis of variance with a completely randomized design. Results: Supplementation of garlic extract significantly influenced the digestibility of Crude Fiber (CF), Neutral Detergent Fiber (NDF ), milk yield and milk efficiency (p<0.05). However, the supplementation had no effect on nutrient intake (dry matter, organic matter and total digestible nutrient) and milk composition (fat, protein, lactose and solid non-fat). Supplementation of garlic extract and organic mineral resulted in better feed digestibility, milk production and milk efficiency than those of the control diet and control diet supplemented with organic mineral (p<0.05). Conclusion: Supplementation of combined garlic extract and organic mineral (Se, Cr and Zn) in dairy cows increases feed digestibility, milk production and milk efficiency.
  Suharlina , Dewi Apri Astuti , Nahrowi , Anuraga Jayanegara and Luki Abdullah
  This study aimed to evaluate nutritional quality of total mixed rations containing Indigofera zollingeriana for dairy goats by using in vitro rumen fermentation technique (RUSITEC). Four rations with different levels of I. zollingeriana were tested, i.e., 20% of dry matter (R1), 40% (R2), 60% (R3) and 80% (R4). Each ration was repeated three times by following a randomized complete block design in which different batch of rumen fluid served as the block. Variables observed included chemical composition, In Vitro Dry Matter Digestibility (IVDMD) and In Vitro Organic Matter Digestibility (IVOMD), methane emission, Volatile Fatty Acid (VFA) profiles and protozoa population. Results revealed that R4 contained significantly higher crude protein content than that of R1-R3 (p<0.05). Rations containing higher proportions of I. zollingeriana (60 and 80% dry matter) had significantly higher IVDMD and IVOMD as compared to their lower proportions (20 and 40% dry matter, p<0.05). Methane concentration was lowest in ration containing the highest proportion of I. zollingeriana and it was accompanied with the lowest protozoa population. It can be concluded that higher inclusion levels of I. zollingeriana in rations improved their nutritional values while decreasing methane emission as a main greenhouse gas.
  Caribu Hadi Prayitno , Nurul Mukminah and Anuraga Jayanegara
  Objective: This study was aimed to evaluate the effect of different feeding methods on feeding behavior, feed intake and digestibility of lactating dairy cows. Methodology: Fifteen first-lactating Friesian-Holstein dairy cows in the third month lactation with an average of 515±61.5 kg b.wt., were used as the experimental animals. The cows were subjected to three different feeding methods namely Component Feeding (CF), cafetaria (cafe) and Total Mixed Ration (TMR) according to a completely randomized design with five replicates. Results: Results demonstrated that treatment affected (p<0.05) single meal time; afternoon feeding frequency and nocturnal rumination frequency, but did not affect rumination time during one day, in the afternoon and evening; single rumination time in 1 day and in the afternoon and afternoon rumination frequency. Digestibility of dry matter, organic matter and energy were not affected by treatments. Conclusion: Conclusively, lactating dairy cows fed with cafeteria feeding pattern took longer single meal time and less frequent afternoon feeding, while the component feeding take one time rumination and longer rumination in standing position and the total mixedration had more frequent daily and nocturnal rumination. The strategy of feeding with TMR resulted in a lower chewing time, tended to decrease feed intake but increase feed digestibility.
  Anuraga Jayanegara , Mohammad M. Sholikin , Della A.N. Sabila , Sri Suharti and Dewi Apri Astuti
  Background and Objective: Cricket contains high crude protein level but it also contains considerable amount of chitin that may impede nutrient digestion and decrease production performance of animal. This experiment aimed to decrease chitin content of cricket (C) through exoskeleton removal (CER) or by chemical extraction (CCE). Materials and Methods: Nutritional evaluation of cricket was performed in two experiments. In experiment 1, three forms of cricket were prepared, i.e., C, CER and CCE. These were subjected to chemical composition determination and in vitro rumen fermentation incubation as individual substrates. In experiment 2, C and CER were included in concentrate rations at different proportions to substitute soybean meal (SBM), i.e., R1 (concentrate containing 30% SBM), R2 (50% SBM was substituted by C), R3 (100% SBM was replaced by C) and R4 (100% SBM was replaced by CER). The concentrates were then evaluated in vitro for their rumen fermentation and digestibility characteristics. Data were analyzed with analysis of variance and Duncan’s test. Results: Cricket was high in crude protein(CP), ether extract (EE) and chitin contents. Removal of exoskeleton decreased CP and chitin contents of cricket. Chemical extraction of cricket increased its CP and completely removed its chitin. Main fatty acids observed in cricket were linoleic acid, palmitic acid, oleic acid and stearic acid and the composition was unaltered due to exoskeleton removal or chemical extraction. Cricket was relatively highly digestible and exoskeleton removal and chemical extraction did not further improve in vitro dry matter digestibility (IVDMD) and in vitro organic matter digestibility (IVOMD) of cricket. The R1 and R2 revealed similar IVDMD and IVOMD, but R3 and R4 resulted in lower values for both parameters than those of R1 and R2 (p<0.05). Conclusion: Exoskeleton removal or chemical extraction effectively reduced chitin content of cricket and the insect may be used to substitute SBM up to 50% in concentrate for ruminant.
  Antonius , Komang G. Wiryawan , Amlius Thalib and Anuraga Jayanegara
  The objective of the present study was to investigate feed digestibility and methane emissions of ration based on oil palm by-products on addition of probiotics, namely Acetoanaerobium noterae and Saccharomyces cerevisiae and banana stem in vitro. The substrate, i.e., oil palm by-products consisted of oil palm midrib, oil palm leaf, oil palm kernel cake and oil palm sludge in the ratio of 30, 30, 30 and 10%, respectively. The following treatments were tested: control (R0), R0+S. cerevisiae (R1), R0+A. noterae (R2), R0+S. cerevisiae+A. noterae (R3), R0+ banana stem (R4), R0+banana stem+S. cerevisiae (R5), R0+banana stem+A. noterae (R6) and R0+banana stem+S. cerevisiae+A. noterae (R7). The treatments were incubated in vitro with buffered-rumen fluid in four replicates (represented by three incubation units per replicate), conducted for 48 h at 39oC. Gas production and methane emission were measured at regular time point intervals. After the incubation, digestibility, Volatile Fatty Acids (VFA), ammonia and microbial counts were determined. Results showed that the highest dry matter digestibility was shown by R5 and the best reduction of methane emission was shown by R2 at 12 h of incubation. In conclusion, supplementation of probiotics did not affect the digestibility of ration based on oil palm by-products but A. noterae addition was potential to mitigate ruminal methane emission.
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