Judul: Pola Sebaran Jenis Keruing (Dipterocarpus spp.) di Areal Konsesi Hutan PT. Salaki Summa Sejahtera, Pulau Siberut, Sumatera Barat
Abstrak: Keruing (Dipterocarpus elongatus, Dipterocarpus retusus, and Dipterocarpus hasseltii) are categorized as commercial timber which has endangered status according to the IUCN. Keruing has been utilized by PT. Salaki Summa Sejahtera. Sustainability of Keruing can be indicate by the distribution pattern and it factors. The purpose of this study is to identify Keruing’s (Dipterocarpus spp.) distribution pattern, community similarity between primary forest and various former condition of logged over areas, the association and disassociation between Keruing and the other dominant species. Data was collected from tree stands that represent the condition of primary forest and various logged over areas (1 year, 4 year and 20 year). Lines plot with 20 m x 500 m, identifying tree species and measuring tree which has diameter for more than 10 cm was made for each condition of tree stands. Distribution pattern of D. elongatus and D. hasseltii is same. Distribution pattern of D. retusus can not be analyzed because it’s found only one tree. Species of D. hasseltii associate with H. merrillianus, H. woodii and H. grandiflorum. Species of D. elongates associate with H. woodii and S. ovalis.
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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: 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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