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All Journal Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences Journal of the Indonesian Tropical Animal Agriculture Tropical Animal Science Journal
O. Sjofjan
Fakultas Peternakan Universitas Brawijaya, Malang, Indonesia
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Energy Environmental Science

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 1 
The Growth of Lactobacillus fermentum Isolated from Quail Intestine on Rice Bran Medium Kalsum, Umi; Sjofjan, O.
Journal of Tropical Life Science Vol 2, No 3 (2012)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The objective of this study was to investigate the growth of Lactobacillus fermentum isolated from the intestine of Japanese quail (Coturnix japonica) on medium variation of rice bran meal. The influence of this medium preparation on the cell number and produce of lactic acid of L.fermentum was evaluated every six hour in 36-hour incubation. A randomized block design was used to assign three variation of rice bran medium (6, 9 and 12) %. The result showed that the higest cell number was in 9 % rice bran medium at pH 4.7 at 12th hour was 5.2 x 1010 CFU/ml and the highest lactic acid concentrations were 0.57 %. The fastest speed of growth in 9 % rice bran medium was 0.92 generation/hour and generation time 45 minutes. In conclusion, the optimum growth of L.fermentum was in 9 % rice bran medium at 12th hour.Keywords: Lactobacillus fermentum, growth, quail, rice bran.
Implication of feed restriction during growth period on the growth hormone profiles and morphology ovary of quail hen (Coturnix coturnix japonica) Hertamawati, R.T.; Soedjarwo, E.; Sjofjan, O.; Suyadi, S
Journal of the Indonesian Tropical Animal Agriculture Vol 44, No 4 (2019): December
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.44.4.415-422

Abstract

The aim of this research was to evaluate the effect of feed restriction on growth hormone profiles and ovarian morphology during the growth period. Three hundred 14-day-old quails were used. The quails were maintained on two feeding restriction programs: two dietary regimes based on metabolizable energy (ME), R1 = 2900 kcal/kg and R2 = 2800 kcal/kg, and 3 quantitative feed restriction diets, P0 = 100% ad libitum; P1= 90% ad libitum and P2 = 80%ad libitum (n=300). Each group (n=50) was processed with five replications, 10 birds in each replicate. The change in growth hormone was determined at 28, 35, 42, and 49 days of age, while ovarian morphology was determined at sexual maturity. The results indicated that feed restriction induced a significant increase in growth hormone and insulin-like growth factor-1 after re-feeding. There was no significant effect caused by the rationing of metabolizable energy. The number of large yellow follicles was not different between quails fed with 100% ad libitum and 90% ad libitum. However, feed restriction significantly increased the number of small yellow follicles. In conclusion, the feed could be restricted to 90% ad libitum with a 2900 kcal/kg ration of ME and fed during the starter period (14 to 42 days of age) without influencing ovarian morphology in quails.
The effect of increasing levels of palm kernel meal containing α-β-mannanase replacing maize to growing-finishing hybrid duck on growth performance, nutrient digestibility, carcass trait, and VFA Sjofjan, O.; Adli, D. N.; Natsir, M. H.; Nuningtyas, Y. F.; Bastomi, I.; Amalia, F. R.
Journal of the Indonesian Tropical Animal Agriculture Vol 46, No 1 (2021): March
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.46.1.29-39

Abstract

In this experiment, we investigated the effect of increasing levels of palm kernel meal containing α-β-mannanase replacing maize to growing-finishing hybrid duck on growth performance, nutrient digestibility, and carcass trait. One hundred and ninety- six hybrid ducks [(Peking x Khaki Campbell)] with 410.52 ± 95.25 g BW) were allotted to 5 dietary treatments with 9 ducks (unsexed) per pen and 4 replicates per treatments. These dietary treatments were: NC (negative control; maize-soybean-meal based diet), PKM25 (maize replacement with PKM α-β-mannanase 25%), PKM50 (maize replacement with PKM α-β-mannanase 50%), PKM75 (maize replacement with PKM α-β-mannanase 75%), PKM100 (maize replacement with PKM α-β-mannanase 100%). There was a curve linear decrease in the growing phase and finisher phase in feed intake as the level of α-β-mannanase palm kernel meal increased in the diet. Curvilinear, the result was presented no significant difference (P>0.05) on the initial body weight, growing and finishing phase body weight. The result of this study showed the used α-β-mannanase in the palm kernel meal presented a significant difference (P < 0.05) on the nutrient digestibility of dry matter and crude protein. Furthermore, Carcass traits showed the reflection in line with the final weight and internal organs were better to compare to control 0.5% using α-β-mannanase in the palm kernel meal. In summary, the increase of the level of palm kernel meal with α-β-mannanase enzyme was had a positive effect on the hybrid ducks and the replacement of palm kernel meal by 25% with the addition of the α-β-mannanase enzyme was able to improve digestibility and reduce abdominal  fat of hybrid ducks. 
Production Performance, Meat Quality, and Lipid Profile of Broiler Duck Fed Diets Containing Selenium-Rich Hermentia illucens Larval Kurniawan, D.; Widodo, E.; Susilo, A.; Sjofjan, O.
Tropical Animal Science Journal Vol. 48 No. 1 (2025): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2025.48.1.19

Abstract

The purpose of this study was to determine the effects of Se-enriched Hermetia illucens larvae meal (Se-BSFL) on the production performance, meat quality, and lipid profile of broiler ducks. A total of 250 one-day-old, unsexed hybrid broiler ducklings were randomly allocated into five dietary treatment groups, each with five replications of 10 ducklings, namely a control diet (T1), and control with added 5% (T2), 7.5% (T3), and 10% (T4) Se-BSFL, and a positive control diet with 10 mg/kg Se-Yeast (T5) for 42-days. Feed intake and body weight were measured on a weekly basis. At the end of the trial, one bird was selected from each replicate and sacrificed to determine carcass composition and blood serum profiles. The results indicated that dietary supplementation of 5% Se-BSFL resulted in higher final body weight, body weight gain, feed intake, and lower feed conversion ratio than the Se-yeast supplemented diet. Supplementation of Se-BSFL at 5% to 10% significantly affected (p<0.05) high-density lipoprotein, low-density lipoprotein, cholesterol, and triglyceride compared to those of T1 and T5. Supplementation with 5% and 7.5% Se-BSFL (p<0.05) has higher levels of monounsaturated fatty acids in comparison to T1 and T5. Moreover, the supplementation of Se-BSFL did not influence the physical quality of the meat. In conclusion, feeding Se-BSF at 5% is recommended in diets as it does not negatively affect production performance and carcass traits. These findings suggest that the inclusion of Se-BSFL in broiler duck diets enhances their fatty acid and serum lipid profiles, indicating potential benefits from the use of Se-BSFL as a feed component in poultry production.
Selenium Supplementation Tended to Increase Digestibility and Milk Fat Content in Dairy Goats: A Meta-Analysis Nurmala, D. P.; Susilorini, T. E.; Sjofjan, O.; Adli, D. N.
Tropical Animal Science Journal Vol. 47 No. 4 (2024): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2024.47.4.456

Abstract

A meta-analysis was conducted to determine the effects of selenium supplementation on milk production, milk composition, and nutrient digestibility in dairy goats. A database was constructed based on relevant published papers. Related studies that met the criteria were sourced from PubMed, Scopus, and Google Scholar. After the identification of studies through the SYRCLE method, the final dataset consisted of 15 studies and 188 treatments. The data were analyzed using R version 4.3.3 (2024-02-29 ucrt) “Angel Food Cake”, which utilizes packages such as lme4, lmerTest, and caret. The results showed that increasing concentrations of selenium tended to increase the digestibility of dry matter (DM), organic matter (OM), crude protein (CP), ether extract (EE), and total digestible nutrients (TDN) (p<0.05). Additionally, the results indicated a significant improvement on the milk fat content (p<0.05). In conclusion, selenium supplementation until 0.2 mg/kg significantly increase digestibility and milk fat content in dairy goats.
Co-Authors Abd. Rasyid Syamsuri Adli, D. N. Amalia, F. R. Bastomi, I. D. Kurniawan E. Widodo, E. Hertamawati, Rosa Tri Natsir, M. H. Nuningtyas, Y. F. Nurmala, D. P. Soedjarwo, E. Susilo, A. Susilorini, T. E. Suyadi, S