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Articles by Abdi Dharma
Total Records ( 6 ) for Abdi Dharma
  Wizna , Yose Rizal , Hafil Abbas , Abdi Dharma and I.P. Kompiang
  An experiment was conducted to determine the effects of substitution of Bacillus amyloliquefaciens fermented tapioca by-products for some of corn meal in the diets on the performance of broilers and ducklings. 200 unsexed day old broiler chicks and 200 male day old ducklings were randomly allocated into 40 pens (teen chicks or duckling/pen). This experiment was arranged in a completely randomized design with five dietary treatments (0, 10,20, 30 and 40% for broilers and 0, 30, 40, 50 and 60% for ducklings) of fermented by-product tapioca in diets and four replications. Measured variables were those of feed consumption, average body weight gain, feed conversion and carcass percentage. Results of experiment indicated that feed consumption, average body weight gain, feed conversion and carcass percentage were not affected (p>0.05) by levels of Bacillus amyloliquefaciens fermented tapioca by-products in the diets for broilers. However average body weight gain was affected (p<0.05) and feed conversion were highly affected (p<0.01) by levels of Bacillus amyloliquefaciens fermented tapioca by-products in the diets for ducklings. Increasing levels of Bacillus amyloliquefaciens by products of tapioca up to 60% in diets of ducklings increased their body weight gain and reduced their feed conversion. In conclusion, Bacillus amyloliquefaciens- fermented tapioca by-products can be included up to 40% in diets (replace 67% corn meal) for broilers and up to 60% in diets for ducklings (replace 100% corn meal).
  Maria Endo Mahata , Ichni Lestari , Abdi Dharma , Irsan Ryanto H. , Armenia and Yose Rizal
  Serratia marcescens is a bacterium able to produce chitinase for degrading chitin. Broiler chickens can not digest significant amounts of chitin because they produce very little chitinase in their digestive tract. Therefore, broiler feed containing chitin must be processed first with chitinase. Serratia marcescens is an opportunistic pathogenic bacterium and a pathogenicity test is required before using its chitinase for processing of feed containing chitin. An experiment was conducted by using broiler. A split-plot, completely randomized design is used in this experiment. The Serratia marcescens dosages (0, 40, 80, 160 and 320 mg/kg body weight) were the main plot and observation lengths (2, 4, 8, 16 and 22 days) were the sub plot factor. The ration for different treatments had the same protein (23%) and energy (3000 kkal/kg) content. Feed consumption, average daily gain, body temperature and mortality were parameters. Results showed that feed consumption and average daily gain were significantly affected (p<0.05) by presence of Serratia marcescens. The highest feed consumption (123.10 g/broiler) and average daily gain (76.75 g/broiler/day) were found for the highest bacterium dosage of 320 mg/kg body over 22 days observation. Body temperature range from 39.82-40.08°C and there was no affect of Serratia marcescens on mortality. In conclusion, the Serratia marcescens had no negative effect on broiler performance.
  Maria Endo Mahata , Abdi Dharma , H. Irsan Ryanto and Yose Rizal
  The objective of this study is to measure the effect of substituting different levels of shrimp waste hydrolysate (SWH) from Penaeus merguensis for fish meal (FM) in broiler diet. The broilers were randomly assigned in 4 different levels of SWH (0, 4, 8, and 12%) in experimental diet with a Completely Randomized Design. Each dietary treatment was replicated five times. The result of this experiment indicated that weight gain, feed conversion, and percentage nitrogen retention were affected significantly (P<0.05), and no significant differences were found for feed consumption, percentage carcass, percentage abdomen fat, and digestive organ size (liver, proventriculus, gizzard, cecum, and pancreas). The inclusion of SWH until 8% in broiler diet kept the weight gain and feed conversion stable as well as FM in diet, however the inclusion to 12% decreased weight gain and negative effect in feed conversion. In conclusion, SWH could be included to 8% in broiler`s diet or substitute FM as alternative of animal protein source as much as 40%.
  Wizna , Hafil Abbas , Yose Rizal , Abdi Dharma and I. Putu Kompiang
  An experiment was conducted to improve the nutrient content of sago pith (Metroxylon sago Rottb) and rumen content mixture through fermentation by using cellulolytic bacteria (Bacillus amyloliquefaciens) as inoculums. The experiment was determination of the optimum conditions (dosage of inoculums, fermentation length and temperature) for sago pith and rumen content mixture fermentation based on nutrient quality and quantity of these fermented products. The study was conducted in experimental methods, using the completely randomize design in factorial with 3 treatment were : 1. A factor (Dosage of inoculums: A1 = 2%, A2 = 6%, A3 = !0%), 2. B factor (Fermentation length : B1 = 3 days, B2 = 6 days, B3 = 9 days) and 3. C factor (Temperature : C1 = 30oC, C2 = 40oC and C3 = 50oC). Results of study showed that optimum conditions of the fermentation of sago pith (Metroxylon sago Rottb) and rumen content mixture was at 2% dosage of inoculums, 9 days of fermentation length and 40oC temperature. This conditions can decrease 33% of crude fiber and increase 42% of crude protein which made the nutritional value of the product based on dry-substance was 15.79% crude protein, 2.75% crude fat, 18.54% crude fiber, 0.20% calcium, 0.16% phosphor, 2540 Kcal/kg metabolic energy, and 66.65% nitrogen retention.
  Wizna , Hafil Abbas , Yose Rizal , Abdi Dharma and I. Putu Kompiang
  An experiment was conducted to improve the nutrient content of tapioca by-products (onggok) through fermentation by using cellulolytic bacteria (Bacillus amyloliquefaciens) as inoculums. The experiment was determination of the optimum conditions (dosage of inoculums, fermentation length and temperature) for tapioca by-products (onggok) fermentation based on nutrient quality and quantity of these fermented products. The study was conducted in experimental methods, using the completely randomize design in factorial with 3 treatment were: 1) A factor (Dosage of inoculums: A1 = 2%, A2 = 6%, A3 = !0%), 2) B factor (Fermentation length: B1 = 3 days, B2 = 6 days, B3 = 9 days) and 3) C factor (Temperature: C1 = 30oC, C2 = 40oC, C3 = 50oC). Results of study showed that optimum conditions of the fermentation of tapioca by-products (onggok) was at 2% dosage of inoculums, 6 days of fermentation length and 40oC temperature. This conditions can decrease 32% of crude fiber and increase 360% of crude protein which made the nutritional value of the product based on dry-substance was 7.9% crude protein, 2.75% crude fat, 11.55% crude fiber, 0.26% calcium, 0.17% phosphor, 2190 Kcal/kg metabolic energy and 65.95% nitrogen retention.
  Nita Yessirita , Hafil Abbas , Yan Heryandi and Abdi Dharma
  Here we try to determine the effect of fermented leucaena leaf meal in the ration of Pitalah ducks. The research design used Randomized Completely Block of Design (RCBD) with 7 treatments, 3 replications and each replication consist of 6 laying duck. The treatment of this research were RO (control), R1 (10% leucaena leaf meal without fermentation), R2 (10% leucaena leaf meal fermented by Bacillus laterosporus), R3 (20% leucaena leaf meal fermented by Bacillus laterosporus), R4 (10% leucaena leaf meal fermented by Trichoderma viride), R5 (20% leucaena leaf meal fermented by Trichoderma viride), R6 (10% leucaena leaf meal fermented by Bacillus laterosporus+10% leucaena leaf meal fermented by Trichoderma viride). Parameter which are observed like: feed consumption, egg production, egg weight and feed conversion. The results showed that the ration treatment influenced different highly significant (p<0.01) for feed consumption, egg weight and egg mass ration treatment but influenced different significantly (p<0.05) on egg production and feed conversion treatment. The use of the product leucaena leaf fermentation with Trichoderma viride and Bacillus laterosporus as much as 20% in Pitalah ducks rations and R2 treatment increase feed consumption (897.47g/bird/week), egg production (59.66%), egg weight 56.23 g/grain, egg mass (234.86g/head/week) and feed conversion (3.58 for R6 treatment). Treatment ration (R2, R3, R4, R5 and R6) is better than control ration and can improve performance of Pitalah ducks.
 
 
 
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