Judul: Pendugaan Potensi Simpanan Karbon Di Atas Permukaan Lahan Di Areal PT ANTAM UBPE Pongkor, Jawa Barat
Abstrak: Hutan dapat menjadi sumber emisi karbon (source) dan juga dapat menjadi penyerap karbon dan menyimpannya (sink). Kemampuan hutan dalam menyerap dan menyimpan karbon tidak sama baik pada berbagai tipe hutan. Saat ini, diperlukan suatu kegiatan mengkuantifikasi serapan karbon dari biomassa baik di hutan alam maupun hutan tanaman yang ada di perusahaan pertambangan seperti PT ANTAM UBPE Pongkor, Jawa Barat. Tujuan dilakukan penelitian ini untuk menghitung potensi biomassa dan simpanan karbon di atas permukaan lahan pada hutan alam dan hutan tanaman di areal PT ANTAM UBPE Pongkor, Jawa Barat. Pengukuran biomassa pohon, tiang, pancang, dan nekromassa dilakukan dengan metode non destruktif sedangkan pengukuran biomassa tumbuhan bawah dan serasah menggunakan metode destruktif. Hasil penelitian menunjukan bahwa potensi biomassa di atas permukaan lahan di hutan alam dan hutan tanaman sebesar 103.13 ton/ha dan 56.11 ton/ha. Simpanan karbon di atas permukaan lahan di hutan alam dan hutan tanaman sebesar 47.44 ton/ha dan 24.66 ton/ha. Hasil pendugaan potensi simpanan karbon berbanding lurus dengan potensi biomassa.
Keyword: biomassa, hutan alam, hutan tanaman, karbon

Judul: Pendugaan Potensi Simpanan Karbon di Atas Permukaan Lahan Pasca Tambang PT. Antam UBPE pongkor, Jawa Barat
Abstrak: Post mining land reclamation is one of the effort to increase carbon stock. Reclamation activities will recover the post-mining degraded lands. The objectives of this study were create an allometric of some tree species, estimate and compare the carbon stock on the land of PT. Antam UBPE Pongkor, West Java in 2001, 2002, and 2003 planting years. Biomass measurement of tree, pole, and sapling was done with non destructive method, while understorey, litter, and necromass was done with destructive method. The allometric which used in this study has the highest R2 value, so that all of allometric can be used for estimate tree’s volume. The result of this study show the highest potential carbon found in 2001 planting years, the potential carbon of this planting year is 107.14 ton/ha, and then 2003 planting years is 101.44 ton/ha, and 2002 planting years is 94.18 ton/hnd a. Carbon potential differences caused by composition, structure, stand density, and canopy coverage
Keyword: Bogor Agricultural University (IPB), PT. Antam UBPE Pongkor, carbon, biomass

Judul: The Leukocyte Profile of Pregnant Friesian Holstein Cows vaccinated with Escherichia coli K99 polivalen vaccine.
Abstrak: The objective of this experiment was to study the leukocyte profile of pregnant cows vaccinated with E.coli K99 polivalen vaccine. Three pregnant Friesian Holsteins cows were used in this experiment. Before the administration of vaccine, the cows were given a series of immunomodulator injection for three days. The vaccinations were administered three times at 8, 6, and 4 weeks before calving. Blood were drawn through jugular vein, first before the administration of vaccines, then weekly until calving. Based on the observation, it can be concluded that the administration of E.coli K99 polivalen vaccine in pregnant cows not affected the leukocyte profile. Keywords : Escherichia coli vaccine, leukocyte profile, differential leukocyte
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