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: Komposisi Jenis, Struktur, dan Simpanan Karbon Agroforestri Berbasis Kayu Afrika (Maesopsis eminii Engl.) di Desa Sukamanah Kabupaten Bogor
Abstrak: Pemanasan global merupakan kondisi meningkatnya akumulasi gas karbondioksida (CO2) di atmosfer bumi yang disebabkan oleh deforestasi dan degradasi hutan serta pembakaran material berbahan fosil. Kegiatan penanaman berbasis agroforestri mampu dijadikan upaya pencegahan pemanasan global. Keberadaan tanaman berkayu dan tanaman pertanian berpotensi sebagai penyimpan karbon. Tujuan penelitian yaitu menganalisis komposisi jenis, struktur, dan simpanan karbon agroforestri berbasis kayu afrika (M. eminii) di Desa Sukamanah, Kabupaten Bogor. Metode yang digunakan adalah pengukuran biomassa tegakan secara non destruktif pada plot berukuran 40 m x 5 m dan pengukuran biomassa tumbuhan bawah dan serasah secara destruktif pada 10 sub plot 0.5 m x 0.5 m. Indeks nilai penting (INP) tertinggi pada tingkat pertumbuhan pancang, tiang, dan pohon adalah jenis pisang (Musa spp.). sebesar 98.79%, 258.63%, dan 246.84%. Indeks kekayaan (R), indeks keanekaragaman (H’), dan indeks kemerataan (E) menunjukkan tanaman pada tingkat tiang paling tinggi keberadaannya, sedangkan indeks dominansi (ID) menunjukkan bahwa tingkat penguasaan terdapat pada beberapa jenis tanaman. Stratifikasi tajuk pada 6 agroforestri yang diteliti adalah strata C dan D. Nilai biomassa tertinggi terdapat pada agroforestri VI (kayu afrika, alpukat, nangka, mangga, rambutan, kopi, melinjo, pisang, kapulaga, talas, temu kunci, cengkeh) sebesar 54.17 ton ha-1 atau simpanan karbon sebesar 25.46 ton ha-1. Nilai biomassa dan karbon terendah terdapat pada agroforestri V (kayu afrika, pisang, singkong, kacang tanah, bawang daun) sebesar 3.03 ton ha-1 dan 1.42 ton ha-1.
Keyword: agroforestri, komposisi jenis dan struktur, Maesopsis eminii, simpanan karbon

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