Judul: Root to Shoot Ratio Biomassa dan Massa Karbon Pohon Jati (Tectona grandis L. f.) di KPH Balapulang, Perum Perhutani Unit I, Jawa Tengah.
Abstrak: Climate change, that is marked by improvement of earth’s surface temperature (global warming), is caused by human activities that increase the emmision of greenhouse gasses to the atmosphere. These gasses includes carbondioxide (CO2), nitrous oxide (N2O), methane (CH4), sulphurous hexafluoride (SF6), perfluorocarbons (PFCs), and hydrofluorocarbons (HFCs). Ignition of hydrocarbonic compounds such as fossil fuels (coal, petrol fuel, and natural gas) or biomass (wood) are human activity that could cause emmision of greenhouse gasses to the atmosphere and, further, global climate change. This research objective is to observe biomass and carbon mass root to shoot ratio of teak (Tectona grandis L. f). Observation was done to 30 samples of teak, consisting of 6 tree samples in each age group of 1 to 5 year old tree. Then, calculation of biomass and carbon mass of root, stem, branch, twig and leaf is done to each sample. Biomass root to shoot ratio of each samples were analyzed by comparing root biomass value to biomass main stem value, then recompares root biomass value to total surface (stem, branch, twig, and leaves) biomass. Carbon mass root to shoot ratio were calculated by dividing root carbon mass to main stem carbon mass, which then recalculated by dividing root carbon mass to surface carbon mass. Further, expansion factors are analyzed by comparing biomass and carbon value of surface section to main stem section of samples. Biomass root to shoot ratio based on main stem is about 0,1155-0,5048 (Average 0,2296), while based to surface biomass is about 0,1090-0,4317 (Average 0,1983). Carbon mass root to shoot ratio based on main stem is about 0,1159-0,5068 (Average 0,2320), while based to surface carbon mass is about 0,1111-0,4381 (Average 0,2030). Average expansion factor of biomass for age level I-V is 1.15, while average expansion factor of carbon mass for age level I-V is 1,13. Biomass root to shoot ratio and mass carbon root to shoot ratio is comparison biomass or mass carbon root value to biomass or carbon mass of the suface (stems branche, twig and leave). Biomass expansion factor or mass carbon expansion factors is the ratio of biomass or mass carbon whole parts of carbon tree to biomass or mass carbon on the stem.
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Judul: Persamaan Alometrik Biomassa dan Massa Karbon Pohon Jati (Tectona grandis Linn. f.) (KPH Balapulang, Perum Perhutani Unit I, Jawa Tengah).
Abstrak: The forest contribute to reduce greenhouse gases (GHG) that become trigger global climate change by binding the CO2 gas in the atmosphere. In the climate change convention entitled Conference of the Parties held in 1997, Kyoto Protocol was declared. One of the contents of this protocol is used by the developed countries as the basis to finance low-pollution project in developing countries. Calculating the forest carbon mass using allometric equations of biomasss and carbon mass is still rarely done, therefore the research is needed to gain further information. The Teak tree (Tectona grandis Linn. f.) is known as a high-quality commercial wood and it is widely planted in Java Island. This research was conducted at KPH Balapulang, Perum Perhutani’s Unit I, Central Java. The objective of this research is to get allometric equation of biomass and carbon mass for Teak tree (Tectona grandis Linn. f.). Selection of sample trees in each age class was conducted by purposive sampling, ranging from age class 1 to age class 5. Laboratory test were conducted to determine the carbon content in each part of the tree. Best equation was selected conducted using allometric regression based on the highest R2(adj), (real level) p <0,05, Fcount > Ftable and smallest standard deviation (s). The results of the this study showed the differences of the carbon content in various parts of the tree (trunk, branches, twigs, leaves, and roots). Allometric equations selected for biomass Teak tree (Tectona grandis Linn. f.) is B = 0,1383 D2,45 and allometric equation selected for Teak tree carbon mass is M = 0,0933 D2,44.
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Judul: Trichomonas Gallinae Penyebab Trichomonosis Pada Unggas
Abstrak: Trichomonas gallinae adalah protozoa yang bergerak aktof dengan keempat flagella yang mempunyai layar dan pada salah satu sisinya terdapat membran seperti sirip ikan yang berombak. Spesies dari genus Trichomonas ini mempunyai arti penting pada unggas, karena dapat menyebabkan infeksi pada alat pencernaan bagian atas.
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