Judul: Potential Carbon Storage of Acacia and Puspa Mixed Stand at KHDTK Haurbentes, Bogor
Abstrak: Forest has an important role in controlling global warming. Forest absorbs CO2 and stores it as plant biomass through the process of photosynthesis. The purpose of this research is to calculate biomass and carbon storage potential of acacia and puspa mixed stand at KHDTK Haurbentes, Bogor. The research was conducted by making sample plots measuring 20 x 20 meters. The measurement of the biomass of saplings, poles, and trees was carried out using a non-destructive method, while the measurement of the biomass of litter and understorey using a destructive method. The analysis of litter and understorey samples to obtain the dry weight of the kiln and stored carbon is carry out at Pengaruh Hutan Laboratory, Faculty of Forestry and Enviroment, IPB. The result of this research showed that potential for biomass and carbon storage of acacia and puspa mixed stand at KHDTK Haurbentes are 31.70 ton/ha and 15.62 ton/ha. The estimation of carbon storage was directly proportional to biomass potential.
Keyword: biomass, carbon, climate change, forest

Judul: Potention of Carbon for Acasia Forest
Abstrak: Forest has a function that includes social, economic, ecological, and environmentally important enough for human life. In fact, efforts to maintain the stability of forest function would be difficult to do especially for countries that are developing, where the economic function of forests is more dominant. Utilization of forest that are not offset by maintenance and repair efforts will result in forest destruction and human losses. In this context, the destruction of forests is one of the causes of global climate change. Solutions that might be done now is to maintain the remaining forest area based on the function of forests as carbon storage. This study aims to determine the potential for carbon uptake in acacia at BKPH Parungpanjang KPH Bogor. In this research, application of sampling method followed by a destructive method using a tree sample of each age class. In addition, validation testing based on sample trees conducted to test the equality of the research sites. Estimation of potential carbon uptake in each age class using the equations that have been validated. The results showed that carbon uptake in each age class is different, namely in age class 2, 3, 4, 5, 6, 7, and 8 respectively of 2,923 tons ha-1, 17,624 tons ha-1, 23,987 tons ha-1, 49,581 tons ha-1, 20,782 tons ha-1, 15,326 tons ha-1, and 56,047 tons ha-1. Increased expectations of potential carbon uptake seen with increasing age class in acacia stands, except for age class 6 and 7, it is caused by a diseased.
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Judul: Pengujian Virus Newcastle Disease Gen VII Isolat Lapang Sebagai Virus Standar Pada Uji Tantang Vaksin
Abstrak: This study was conducted to determine the standard of Newcastle disease virus Gene VII field isolate as a virus challenge to vaccine test. A virus suspension that has previously been tested by HA test then titrated with EID50 using 30 Specific Pathogen Free (SPF) of 10 day old chicken embryonated eggs. In addition, chicken lethal dose50 (CLD50) test were used to determine the virus titer that could cause 50% death of the chicken population. The CLD50 test was used 25 day-old-chickens (DOC) divided into 5 groups. The virus was diluted from 10-1 to 10-8. The 104 to 10-8 dilution of NDV was infected to every group of chicken via eyedrop and intranasal with 0.1 ml/chicken dosage. Haemagglutination test showed that the allantoic fluid were contain high titers of NDV is 512 HAU. The infective NDV that had been titrated by EID50 test showed the virus titers is 109 EID50/0.1 ml or 1010 EID50/ml and the virus titers of CLD50 test e.i 106.48 CLD50/0.1 ml or 107.48 CLD50/ml. These results can be concluded that the NDV Gene VII field isolates were most appropriate to be used as a standard virus to vaccine test
Keyword: Newcastle Disease Virus Gene VII, HA tes, EID50 test, CLD50 test