Judul: Correlation between Tree Architecture Models, Soil and Water Conservation at Gunung Halimun-Salak National Park
Abstrak: Soil erosion by water is a worldwide environmental problem which degrades soil productivity and water quality. This research was conducted to find out how tree architecture models influence stemflow, throughfall, infiltration, surface runoff and erosion. The sample of the research was two trees at sub-montane zone Castanopsis argentea BI.with Stone‟s model and Michelia montana Blume. with Petit‟s model. Soil conservation parameter measured for stemflow, throughfall, infiltration, surface runoff and erosion. Multiple linear regression and principal component analyses were used to get the correlation of each parameter. Correlation of the two models Stone and Petit is nearly pursuant to value of stemflow. Stemflow of Stone model (4.73 mm) is slightly smaller than Petit‟s model (6.20 mm). The two models showed also tighter correlation pursuant to value of throughfall, which indicates 657.82 and 640.91 mm for Stone‟s model and Petit‟s model respectively. Runoff estimated was 15.74 and 10.87 mm for the same models. The two models Stone and Petit reduced runoff by 31.33 % and 45.37 %, respectively, as compared to the control surface. Similarly, soil loss was quantified in 1.98, 0.82 and 0.76 ton ha-1year-1 for the Control, Stone model and Petit models, respectively. Above results show that Michelia Montana Blume. is better than Castanopsis argentea BI. to be developed in soil and water conservation.
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Judul: Korelasi arsitektur pohon model rauh dari jenis pinus merkusii junghuhn & de vriese dengan konservasi tanah dan air di area PHBM yang ditanami coffea arabica L. RPH Gambung KPH Bandung Selatan
Abstrak: Trees in CBFM (Community-Based Forest Management) ecosystems are suspected to modify rainfall interception, infiltration and as a consequence, erosion. Their effect urges to be assessed and modelled in various conditions of soil and density of vegetation. The most important parameters that affect the soil water balance and erosion were identified as being the total input of water (throughfall and stemflow) to the ground and the runoff ratio. This research was studied correlation of erosion on rainfall, throughfall, stemflow, and runoff. The aims of the research were to : (1) identify architecture model of pine tree, (2) observe throughfall, stemflow, runoff, and soil loss values, (3) study impact of architecture model of pine tree to water and soil conservation. Runoff and soil loss data were collected for thirty-four days of rainfall from three runoff plots situated on a 36% uniform slope areas. Three fields are studied on this research ; pine forest planted with Coffea arabica L., natural vegetation dominated by Altingia excelsa Noronha., and cultivated land. Erosion measurement was conducted at plots 12 long and 4 m wide. The result of the research indicates that P.merkusii and A.excelsa have same tree architecture, Rauh model. Result of loading plot analysis indicate that correlation between throughfall, stemflow and runoff with rainfall and erosion are positive. Forest planted P. merkusii and natural vegetation dominated by A. excelsa prevent or decrease the risk of soil erosion. The greatest amount of sedimentation was observed in cultivated land (55.99 ton/ha/yr). In conclusion, important to consider the type and model of tree architecture which will be planted so as to conserve soil and water and to keep the ground cover to decrease soil erosion.
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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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