Judul: Penyusunan model penduga volume pohon jenis Keruing (Dipterocarpus sp.) di IUPHHK-HA PT. Salaki Summa Sejahtera, Pulau Siberut, Sumatera Barat
Abstrak: A careful, rational and directional forest planning should be conducted to achieve sustainable forest management. Periodic Census Inventory of Forest/Inventarisasi Hutan Menyeluruh Berkala (IHMB) is important to arrange ten years of Work Planning on Timber Utilization/Rencana Kerja Usaha Pemanfaatan Hasil Hutan Kayu (RKUPHHK). Providing aid of inventory is one of important things to support IHMB and reduce error in measurement. One of the methods to estimate trees’ volume is by using table of volume. The table of volume is useful to estimate volume of certain trees in a stand forest then to estimate their standing stock. The aims of this research are to arrange and obtain equality model of trees’ volume estimation from species of Dipterocarpus sp. In this research, the trees were selected purposively by diameter consideration, those which have normal growth and representative diameter. The total of samples was 55 trees; 45 trees were for model construction and 10 trees for validation purpose those trees were determined randomly. Data was analyzed using the least square method and the estimation of trees volume was based on measurement parameters of standing trees and felled trees. Based on regression analysis, the appropriate equality model to estimate volume of Dipterocarpus sp. with bark is V = 0,00014 D2,49 (R2 = 98,00%, s = 0,08). This model is proposed to estimate volume of Dipterocarpus sp. in order to support forest planning in PT. Salaki Summa Sejahtera, West Sumatera.
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Judul: Penyusunan Tabel Volume Lokal Jenis Keruing (Dipterocarpus spp.) di IUPHHK-HA PT. Sarmiento Parakantja Timber, Kalimantan Tengah
Abstrak: In order for the forest sustainability can be ensured, need to do a good forest management plan, careful and accurate information and reliable. The information needed is data about the potential of forest stands. Potential prediction of forest stands are related to the timber volume prediction. To collect such information, then the forest inventory of activities needs to be done. One of the tools to simplify and accelerate the activities of forest inventory is the volume table. Prediction tree stand volume by using the volume table will be more efficient and save costs and time. The purpose of this research is to develop a local volume table of keruing (Dipterocarpus spp.) in the area of IUPHHK-HA PT. Sarmiento Parakantja Timber, Central Kalimantan. The table volume made is table volume premises with diameter of trees as high as the chest (Dbh) as free variables. The preparation of a volume table is done using three models a regression equation with a diameter as free variables. A model of an equation probe volume was selected from third best model the regression equation is based on criteria test statistics in the preparation and validation model. The test criteria, namely the coefficient of determination (R2), standard deviation (s), diversity analysis, refraction, aggregate deviation (SA), average deviation (SR), the Root Mean Square Error (RMSE), and mean difference test chi-squared (χ2). Based on these criteria, the model equations estimators keruing (Dipterocarpus spp.) is a model equation Berkout V = 0, 0003631Dbh2, 26 with the value s = 0,059, R2 = 98,70%, Fhitung = 4875,51%, bias = 14,81%, SA = 0,03, SR = 11,04%, RMSE = 19,12,% and χ2 = 1,37.
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Judul: Trichomonas Gallinae Penyebab Trichomonosis Pada Unggas
Abstrak: Trichomonas gallinae adalah protozoa yang bergerak aktof dengan keempat flagella yang mempunyai layar dan pada salah satu sisinya terdapat membran seperti sirip ikan yang berombak. Spesies dari genus Trichomonas ini mempunyai arti penting pada unggas, karena dapat menyebabkan infeksi pada alat pencernaan bagian atas.
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