Judul: Karakterisasi Fisik dan Kelembaban Tanah pada Berbagai Umur Reklamasi Lahan Bekas Tambang
Abstrak: Mining activities cause uncovering of forest vegetation, decrease soil physical, chemical and biological characteristic so that causes land degradation. Land revegetation conducting to improve soil quality on mined land. The objective of research is reviewing influence of land revegetation against soil physical, chemical and dynamics of soil moisture content. Overall mined land has a klei texture, slightly acid soil reaction, high drainage pore and available water which moderate. The highest water content at the seventh day after rains in the forest that is equal to 29.81% on 30-50 cm soil depth. Soil moisture content was higher on lower layer because water content have not been absorbed by the roots or not been lost through evapotranspiration. Physical characteristic such as bulk density, porosity, permeability, infiltration, and soil chemical such as soil organic matter content and soil reaction have improved along with increased age of mined land reclamation.
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Judul: Analisis Sifat Fisik, Kimia, dan Biologi Tanah pada Lahan Reklamasi Bekas Tambang Batubara PT Berau Coal Site Binungan, Kabupaten Berau, Provinsi Kalimantan Timur
Abstrak: Soil degradation becomes the greatest problem of environmental damage due to coal mining, in particular by open pit method. Proper reclamation must be done to repair post mining land so that soil quality can be recovered approaching the original properties. To analyze the results of the reclamation process on physical, chemical, and biological soil properties changes and their development, it is necessary to study the changes of soil properties at different ages post coal mining land reclamation. This research was aimed to identify the changes of physical, chemical, and biological soil properties in relation to increased reclamation age (0, 3, 6, and 9 years old) and compared them to the nearby forest soil properties. This research was conducted in reclaimed post coal mining lands of PT Berau Coal Site Binungan, East Kalimantan Province (aged 0, 3, 6, and 9 years), and native forest. Soil analysis performed at the Laboratory of Chemical and Soil Fertility, Laboratory of Soil Physics, and Laboratory of Soil Biotechnology, Department of Soil Science and Land Resources, Faculty of Agriculture, Bogor Agricultural University. The results showed that increasing age causes changes in soil properties of reclaimed land approaching the soil properties of original land. This can be seen on the parameters such as bulk density, infiltration capacity, aluminum saturation, C-organic, total N, base saturation, Cation Exchange Capacity (CEC), total microbial and fungal, and soil respiration. It is apparent that chemical and biological soil properties on reclaimed land change relatively faster approaching the chemical and biological soil properties of the original land compared to that of physical soil properties.
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Judul: Infeksi Virus Parainfluenza Pada Anjing
Abstrak: Virus parainfluenza anjing termasuk famili Paramyxoviridae, berbentuk pleomorf dengan ukuran bervariasi (bergaris tengah antara 100-500 nm), berpembungkus peka ether, berisi genom RNA dan secara serologis mempunyai kesamaan dengan virus SV-5 kera; dikenak sebagai salah satu kausa penting dari sindrom "kennel cough". Infeksinya dapat mengenai anjing semua umur yang belum pernah terinfeksi atau mendapatkan vaksinasi mengakibatkan gejala klinis ringan yang terbatas pada traktus respirasi atu infeksi yang secara klinis tidak memperlihatkan gejala nyata. Gejala klinis yang nampak setelah masa inkubasi (1-5 hari) terlewati berupa batuk yang tidak berat selama beberapa hari, berbagai tingkat tonsilitis dan pharyngitis dan kadang-kadang ditemukan kenaikan temperatur rektal antara 1-2 derajat C dari temperatur normal rat-rata. Anjing terinfeksi mengandung virus pada traktus respirasi bagian atas dan bawah serta limfonoduli sampai hari ke 9 setelah infeksi. Penyebaran virus antar anjing terjadi secara aerogen.
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