Judul: Kajian hasil-hasil penelitian tentang tingkat pertumbuhan berbagai jenis pohon pada lahan pasca tambang
Abstrak: Mining would give direct negative impact on environmental condition, there are opened soil surface that will increase surface run-off; change on forest ecosystem and forest ecology stability. Objective on post mining area rehabilitation is to construct post mining area fit in the land purpose. Collection results of researches in growth of many trees species is important to know the development of technique and detect the success rate with its factors. The objective of this research to evaluate result on researches collected. This research was carried out by collect and analyze the result of growth on many tree species in post mining area on Laboratorium Bioteknologi Hutan dan Lingkungan ; dan Pusat Penelitian Sumberdaya Hayati dan Bioteknologi (PPSHB) library, University library and Department of Forest Resources Conservation and Ecotourism library at Bogor Agricultural University. Many research resulted there were several tree species which used in rehabilitation post mining area were akasia, lamtoro, gamal, sengon, jarak pagar, pulai, gaharu, nyatoh, kapur naga, mindi, melochia, cemara gunung, nyamplung, ubak, rengkat, leban, and waru . Over tailing in post tin mining area akasia, lamtoro, gamal and sengon well grown with Mycofer and compost treatment beside that jarak pagar seedlings well grown in mixed ameliorant and anorganic fertilizer tratment. Over batu bara tailing, sludge acquition increasing growth of mangium and acacia. Topsoil acquition increasing seedlings growth of pulai species. FMA inoculation and soil amandement treatments increasing grown of agarwood species. Soil amandement treatment given positive effect on seedlings of nyatoh and kapur naga species. Over post gold mining area, combination of active compost and FMA helped mindi species to grown up. Over post nickel mining area, melochia species well grown in fertilizer treatments, beside that grass controlling system helped cemara gunung grown well. Over post tin mining area nyamplung, ubak, rengkat, laban and waru grown up with water splash treatment.
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Judul: Studi Status Fungi Mikoriza Arbuskula Di Areal Rehabilitasi Pasca Penambangan Nikel (Studi Kasus PT INCO Tbk. Sorowako, Sulawesi Selatan).
Abstrak: PT INCO Tbk. is one of the biggest nickel mining company in the Asia- Pasific region and has been operated commercially in Indonesia since 1978. It is located at Sorowako, South Sulawesi Indonesia with the area up to 218.000 hectares. The mining operation process is surface mining. It eliminated the existing vegetation, and it will lead to soil erosion, loss of biodiversity, damage of wildlife habitats and degradation of watershed area, considering with these negative impacts a revegetation programme is fully needed (Setiadi 1995). Revegetation that has been done obstacled by the marginal land conditions where soil structure has been damaged and it has became a lateritic soil. It absorbs elements of phosphate (P), which is essential for plant life. It will be poor of Pavailable that can be absorbed by plants. Therefore input for more effective technology and environmentally friendly is needed, among others by applying a bio-technology Arbuscular Mycorrhizal Fungi biofertilizer (AMF). It has some functions, one of them is increasing nutrients absorption, especially P. Therefore, research on the existence of mycorrhizal status needs to be done as an introduction for research and application of mycorrhizal in the rehabilitation field of post- nickel mining. The result of this research is FMA has been associated with all of observed plants. Some potentially plants to be developed are Sengon buto (Enterolobium cyclocarpum), Sengon albizia (Paraserianthes falcataria), Dengen (Dillenia cerrata), Teak (Tectona grandis), Johar (Senna siamea), Kayu angin (Casuarina equisetifolia), Kayu tanduk (Alstonia spectabilis), and Eucalyptus (Eucalytus Urograndis). Several genera that were found are Glomus sp; Acaulospora sp; and Gigaspora sp.
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Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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