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Articles by P.D.M.H. Karti
Total Records ( 4 ) for P.D.M.H. Karti
  R. Sriagtula , P.D.M.H. Karti , L. Abdullah , Supriyanto and D.A. Astuti
  Brown midrib sorghum (BMR) is a potential crop as forage because of lower lignin content than that of non-BMR sorghum. The aim of this research was to observe the growth and production of brown midrib sorghum mutant lines at different harvest times. This research was conducted at SEAMEO BIOTROP, Bogor, Indonesia using factorial in completely randomized block design (7 x 3) with three replicates. The first factor was the BMR sorghum mutant lines of Patir 3.1 (non-BMR/control), Patir 3.2, Patir 3.3, Patir 3.4, Patir 3.5, Patir 3.6 and Patir 3.7, the second factor was the harvest times (flowering, soft and hard dough phases). Measurement on agronomic parameters were fresh and dry matter biomass production, plant height, stem diameter, leaf width length and ratio of leaves, stems and panicles. While nutrient parameters were crude protein, crude fiber, ash dan crude fat production. Analysis of variance followed by Duncan Multiple Range Test (DMRT) was done. The results showed that the BMR of P 3.7 and P 3.2 produced the highest fresh and dry matter production among the BMRs, but their dry matter production were lower than P 3.1 (control). Harvesting at hard dough phase produce the highest fresh and dry matter production and as well as produced the highest crude protein, ash and crude fat production (p<0.01).
  I. Martaguri , P.D.M.H. Karti , K.G. Wiryawan , R. Dianita and L. Abdullah
  Background: Beside as a source of energy for ruminants, grasses have been identified having a capacity as carbon storage. Axonopus compressus is a grass species that mostly found under shade condition of palm plantations and are easily adaptable with the ecosystem. As a part of the ecosystem, the grass would always carry on photosynthesis even under shade condition as encountered by Axonopus compressus. Thus, it might play an important role in storing carbon. Methodology: Therefore, in this study the capability of this grass in storing carbon were investigated including carbon storage dynamics, nitrogen content, C/N ratio and biomass production. In advanced, carbon and nitrogent content of soil were also studied. A completely randomized design was utilized as experimental design with different grass age of 10, 20, 30, 40, 50 and 60 days as the treatments. Results: Results indicated that grass age influenced significantly all parameters except carbon and nitrogen content as well as the C/N ratio of soil. Furthermore, it was also revealed that there is a dynamic of carbon storage in leaf, stemp and root of the grass. Conclusion: The capacity of the grass in storing carbon increased with increasing plant age.
  Malcky Telleng , K.G. Wiryawan , P.D.M.H. Karti , I.G. Permana and L. Abdullah
  Background: Intercropping involves growing two or more crops on the same piece of land to produce rations for livestock, particularly ruminants. In this study, the silage quality of in situ rations produced from Sorghum intercropped with Indigofera was evaluated to determine which Sorghum variety produced the best silage. Methodology: The pH, Neutral Detergent Fiber (NDF), Acid Detergent Fiber (ADF), ammonia-N (N-NH3), Volatile Fatty Acids (VFA) and total bacteria in silage for use in situ rations were verified. Experiments were conducted using a Completely Randomized Design (CRD) with three replications of three factors: (1) Sorghum variety (Patir-37 and Citayam-33), (2) Indigofera composition (30, 40 and 50% Indigofera ) and (3) Microbial inoculant (Lactobacillus plantarum, Lactobacillus casei and non-microbial inoculant). Data were analyzed using analysis of variance and HSD test. Results: For all rations tested, the pH and N-NH3 values indicated good ensilage. Rations that included the Sorghum variety Citayam-33 had lower pH and N-NH3 production relative to those with Patir-37. In whole crop silages, the inoculants did not significantly affect fermentation. Meanwhile, rations with higher amounts of Indigofera (up to 50%) had lower NDF and ADF. Conclusion: Together the results show that in situ rations made from intercropped Sorghum and Indigofera ensilage well and different compositions can be obtained directly from intercropped fields to produce rations that improve ruminant performance.
  M. Sobri , K.G. Wiryawan , P.D.M.H. Karti and W.T. Wibawan
  Background and Objective: This study was conducted to analyze the effect of the neutral detergent fiber (NDF) and fiber particle size on mortality, hematology, stress status, immunity and number of E. coli in New Zealand white (NZW) crossbred rabbits during the postweaning period. Methodology: A total of 144 NZW crossbred rabbits were used in the study. The trial design was a completely randomized 3×3 factorial pattern, namely, 3 levels of the concentration of neutral detergent fiber (NDF) (F1, F2 and F3) and 3 sizes of fiber particles (P1, P2 and P3). Each treatment was repeated 4 times and each replication consisted of 4 trials. Results: The average mortality up to 12 weeks was 19.44%. The treatment combinations of F3P2 and F2P2 had the lowest mortality rate (0%) and low rates of E. coli infection at 2.55 and 2.71×109 CFU mL1, respectively. The feed treatment affected the hematological values in rabbits during the postweaning period. The results indicated that there was a relationship between mortality and E. coli infection. Moreover, the F3P2 treatment was the best feed combination observed in this study. Conclusion: The feed treatment affected the mortality, immunity, hematology and stress status of NZW crossbred rabbits during the postweaning period.
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