Judul: Applications Light Response Sinusoidal Curves For Carbon Dioxide Sink Measurements on Bamboo Betung (Dendrocallamus asper (Schult f.) Backer ex Heyne).
Abstrak: Planting plant such as bamboo Betung (Dendrocalamus asper (Schult f.) Backer ex Heyne) is one of the best way for reducing global warming effect. Bamboo Betung is giant grass which has been traditionally used by Indonesian people for construction material since a long time ago. It has better carbon sink ability than trees because of its C4 photosintesis mechanisms. In previous studies, the basic formula that was used for fitting plant’s light response curve was less precise. Quadratic and cubic equation make over estimate or under estimate result compared to those calculated based on annual increment. This study tried to obtain an ideal sinusoidal equation model to calculate the carbon sink capacity more precisely. To calculate carbon sink, it necessary to measure carbohydrate mass of leaves, number of leaves per cluster, and leaves area. Carbohydrate mass of the leaves is measured by carbohydrate analysis, where the mass of CO2 is known from the mass conversion of carbohydrates from photosynthesis. Light response sinusoidal curve approximated by multiple linear regression equation. Regression coefficient had been tested by t-student test to obtain the best model equation. In this study, probability value of each regression coefficient was selected P-value <0.1. This research proposed a sinusoidal equation as a basic equation for plant’s light response curve fitting. The sinusoidal equation was success for bamboo betung’s light response curve fitting (R2>60%). The best sinusoidal equations models for light response curve is Ŷ=A+BZ1(X–24(H–1))+DZ1Sin 2π(X−6) 24 . It had similar result in estimating carbon sink (82,35 kg/cluster/year) compared to those which calculated by annual increment (72,98-91,22 kg/cluster/year). It is better to choose sinusoidal equation than quadratic or cubic. In the future, light response sinusoidal curve equation can be used as a standard equation for many other green plants, therefore it can be used as consideration in choosing the most suitable plant to overcome the problem of increasing CO2.
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Judul: Daya Rosot Karbondioksida oleh Beberapa Jenis Pohon di Kebun Raya Bogor
Abstrak: One of environment problem nowdays is global warming. Global warming is caused by increasing of temperature in urban area indirectly because increase of Carbon Dioxide (CO2) concentration in the atmosphere. Related on COP 15 about action from result of UNFCCC is to increase CDM system and Copenhagen Accord, then one of effort for decrease CO2 level in urban area is existence of urban forest. Urban forest is CO2 absorbent and has role to control value of CO2, because CO2 is raw material for photosynthesis. The purpose of this research is to determine of sink ability of plant at Bogor Botanical Garden. This research was done at Bogor Botanical Garden for take leaves from ten species and Balai Besar Bioteknologi dan Sumberdaya Genetika Pertanian for analysis of carbohydrate from July until August 2009 at 05.00 WIB; 12.00 WIB; 17.00 WIB; and 20.00 WIB. Tools and materials for this research is plastic, trash bag, camera digital, oven, digital scales, water bath, Cu, Nelson and Carbohydrate reagents, red phenol, aquades, and 10 species (Pterocarpus indicus, Saraca indica, Bauhinia variegata, Brownea hybrida, Eperua falcata, Endertia spectabilis, Dysoxylum cauliflorum, Eusideroxylon zwageri, Neonauclea glabra, dan Bhesa robusta). Mass of CO2 from all species (from 06.00 WIB until 18.00 WIB) are Pterocarpus indicus (14,253 gram), Saraca indica (16,669 gram), Bauhinia variegata (8,238 gram), Brownea hybrida (8,326 gram), Eperua falcata (8,044 gram), Endertia spectabilis (16,581 gram), Dysoxylum cauliflorum (8,479 gram), Eusideroxylon zwageri (15,223 gram), Neonauclea glabra ()15,767 gram, dan Bhesa robusta (9,972 gram). CO2 sink ability influenced by total number of leaves in the plant, then result of sink ability per plant are Pterocarpus indicus (0,456 ton/pohon/tahun), Saraca indica (3,412 ton/pohon/tahun), Bauhinia variegata (0,259 ton/pohon/tahun), Brownea hybrida (1,017 ton/pohon/tahun), Eperua falcata (0,711 ton/pohon/tahun), Endertia spectabilis (1,970 ton/pohon/tahun), Dysoxylum cauliflorum (0,876 ton/pohon/tahun), Eusideroxylon zwageri (31,692 ton/pohon/tahun), Neonauclea glabra (3,460 ton/pohon/tahun), dan Bhesa robusta (1,608 ton/pohon/tahun). Sink ability of all plants consecutive are E.zwageri, N.glabra, S.indica, E.spectabilis, B.robusta, D.cauliflorum, B.hybrida, P.indicus, E.falcata, dan B.variegata.
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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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