Judul: Perubahan Sifat Fisik Dan Kimia Tanah Akibat Kegiatan Penebangan Hutan dengan Teknik Reduced Impact Logging dan Teknik Conventional Logging.
Abstrak: Forest is a natural environment that could not be evaded from continuous interactions with humans who lived around. The interactions is one way of human to use forest potention. Human activity to use forest is very often result in forest and enviromental degradation. One solution that could keep forest sustainability is a sustainable forestry management which put forward the conservation aspects. In this forest management, soil as a vital resources for plants growth needs to have sufficient attention because soil is one of the most important habitat besides climate and topography factors. A research to evaluate the soil physical and chemical changes due to deforestation activity with RIL and CNV technique was carried out on CIFOR research plots. Upon the research, soil samples were taken from RIL, CNV, and Control plot. The soil samples were analyzed in Soil Physical Laboratory and Soil Chemical Laboratory in Soil Science and Resources Department, IPB. The data which is examined from physical and chemical analysis then statistically analyzed with Test of Between Subjects Effects, and continued by Duncan Test with p < 0,05 to view the relationship between RIL, CNV, and Control plot conditions. Results from physical analysis showed that bulk density on CNV plot is higher than that on RIL and Control plot. Meanwhile, the values of porosity, available water, and permeability on CNV are less than those on RIL and Control plot. Results from chemical analysis showed that C-Organic, Total-N, available P, K, and Cation Exchange Capacity (CEC) values on CNV plot are less than those on RIL and Control values. Statistics analysis showed that the values of bulk density, porosity, available water, C-Organic, Total-N, available P, K, and KTK on CNV, RIL, and Control plot are not significantly different. Meanwhile, the values of permeability on CNV plot is significantly different from RIL and Control plot. Examined soil physical changes are increasing of bulk density, decreasing of porosity, available water, and permeability. Examined soil chemical changes are decreasing of C-Organic content, decreasing of Total-N, decreasing of available P, decreasing of K, and decreasing of Cation Exchange Capacity (CEC). Physical and chemical changes on RIL plot are less than CNV plot, which means that RIL technique is better than CNV technique.
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Judul: Efektivitas pemanenan kayu dengan teknik reduced impact logging terhadap cadangan massa karbon di hutan alam tropika, Kalimantan Timur
Abstrak: The research was carried out in natural tropical forest managed by PT Inhutani II, East Kalimantan. The objectives of the research were to study carbon (C) stock in natural tropical forest after conventional logging (CL) and reduced impact logging (RIL) and to asses the effectivness of RIL based on forest carbon stock, financial and other environmental aspects. The effect of CL and RIL to the environment and carbon stock in the plots were studied using the data of three plots with each size 100 m x 100 m. The plots are placed based on purposive sampling at landing, main skiddtrail and branch skiddtrail, respectively. The results of the research showed that the potencial of commercial timber species in conventional logging and RIL were 353.51 stems/ha and 362.7 stems/ha. The number of residual stand damages caused by conventional logging and RIL were 134.67 stems/ha (38.10 %) and 85.33 stems/ha (23.52 %). The avarage of one fell tree at conventional and RIL plots caused residual stand damages 26.93 stems and 17.07 stems, respectively. The avarage of residual stand damage by one felled tree of RIL can reduce residual stand damage of 9.86 stems (36.61 %) compared with conventional logging. This indicated that conventional logging in the tropical natural forest caused heavier damage on residual stand compared with RIL. Forest C stocks were counted by allometric equation of tree. The results of the research showed that allometric equation of trees was C = 0.017597 D2.73, the forest C stock of 10 years after logging were 99.16 Mg ha-1 in conventional logging area, and 139.17 Mg ha-1 in RIL area, respectively. The average of the forest C stocks of logged over areas after RIL and CL in one cycle (30 years) were 118.20 Mg ha-1 year -1 and 75.64 Mg ha-1year-1. This research indicated, that the difference in C stocks of RIL compared with CL was 42.56 Mg ha-1 year -1. Based on financial analysis, RIL was feasible and profitable at rate interest 16 %.
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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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