Judul: Pendugaan Kandungan Karbon Tegakan Kayu Afrika (Maesopsis eminii) Pada Berbagai Pola Tanaman
Abstrak: Mechanism of changes of CO2 in the atmosphere trigger the changes in global temperature (global warming or global cooling). This condition requires a forest management toward utilization of forest services. Forests are no longer functioning as a timber but rather serves as a carbon sink in the atmosphere. The role of forest management seen important in helping to absorb carbon, so that it should be needed have a research on the measurement of the alleged of carbon content on the fast-growing plants on the Afrika wood species in a variety of cropping patterns in Megamendung Forest. This research aims to study the Content of Carbon above Ground on Wooden Stand of Afrika ((M. eminii) on a Variety of Cropping Patterns and the factors which affecting the carbon content. Collection of data biomass on wooden stand of Afrika using a non-destructive method, while the undergrowth plants using a destructive methods. The data were analyzed using the Microsoft excel. The value of C in Afrika wood depending on the growth activity to produce the biomass weight. The largest C values found on land with monoculture cropping pattern. Afrika wood on monoculture cropping pattern showed the greatest individual value of C compared with Afrika wood on mixed cropping and agroforestry in the amount of 0,02357 ton/ind. The factors of high canopy density affects the activity of the Afrika wood growth in the formation of biomass and content of C. Plant spacing and cropping pattern as well as maintenance activities affect content of C in the Afrika wood biomass.
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Judul: Simpanan Karbon Lahan Agroforestri Berbasis Kayu Afrika (Maesopsis eminii Engl.) di Desa Sukamahi, Kecamatan Megamendung, Kabupaten Bogor.
Abstrak: Karbon dioksida merupakan gas rumah kaca (GRK) yang terpenting. Gas ini dihasilkan saat zat karbon bergabung dengan oksigen di udara. Peningkatan karbon dioksida (CO2) di udara harus diimbangi dengan jumlah vegetasi penyerapnya. Pohon mampu menyimpan karbon lebih besar dari padang rumput atau pertanian monokultur melalui proses fotosintesis. Pendugaan simpanan karbon bertujuan mengetahui potensi simpanan karbon yang tersimpan pada suatu lahan tertutama di lahan agroforestri sebagai upaya mitigasi efek rumah kaca dan pemanfaatan lahan yang optimal. Selain itu penelitian ini juga bertujuan mengetahui kondisi vegetasi melalui analisis vegetasi. Metode yang digunakan adalah non-dectructive sampling untuk biomassa pohon dengan menduga melalui persamaan allometrik pohon dan destructive sampling untuk biomassa tumbuhan bawah dan serasah. Hasil penelitian menunjukkan kayu afrika (M. eminii) menjadi jenis utama pada pola agroforestri yang diamati. Berdasarkan kelas diameter lokasi penelitian didominasi oleh pohon dengan diameter <10 cm. Statifikasi tajuk lokasi penelitian dibentuk oleh strata C dan D. Pola AF1(Kayu afrika, albizia, durian, jati, suren, mindi, laban, pisang, singkong, cabai, kacang tanah, kunyit) memiliki simpanan karbon tertinggi sebesar 21.30 ton/ha dan terendah AF4 (Kayu afrika, pisang, ternak kambing) 7.72 ton/ha. Perbedaan nilai simpanan karbon diduga karena perbedaan kerapatan pohon, diameter, tinggi, pola tanam, dan karakteristik tanah.
Keyword: agroforestri, biomassa, karbon, M. eminii

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