Judul: Kerusakan tegakan tinggal dan keterbukaan areal akibat penebangan dan penyaradan : Magang sebagai supervisor pengawas petak tebangan di HPH PT Diamond Raya Timber, Propinsi Riau
Abstrak: Pelaksanaan pengelolaan hutan lestari (PHL) atau Sustainable Forest Management (SFM) harus diterapkan oleh pemegang konsesi Hak Pengusahaan Hutan (HPH) dengan tujuan menjaga kelestarian hutan dan mengurangi dampak terhadap lingkungan di sekitar hutan. Sesuai dengan prinsip dan kriteria dari Forest Stewardship Council (FSC) mengenai dampak lingkungan, pengawasan dan penilaian terhadap kegiatan pemanenan mutlak diterapkan yang salah satunya adalah kerusakan tegakan tinggal dan keterbukaan areal akibat penebangan dan penyaradan. Tujuan umum magang adalah melatih kemampuan berpikir mahasiswa dalam bertindak positif dan kritis terhadap permasalahan yang dijumpai di lapangan dan belajar mengerjakan pekerjaan pengawasan kegiatan penebangan dan penyaradan kayu. Sedangkan tujuan khusus adalah mengetahui kerusakan tegakan tinggal dan keterbukaan areal akibat kegiatan penebangan dan penyaradan. Areal Unit Manajemen Hutan (UMH) PT. Diamond Raya Timber (DRT) berbatasan pada sebelah Utara dan Timur dengan Selat Malaka, Selatan dengan PT. Riau Tanah Putih dan Barat dengan Sungai Rokan. Secara geografis areal UMH PT. DRT terletak pada 100°50' - 101°13' BT dan 01°45'- 02°18' LS dan secara administratif pemerintahan terletak di Kabupaten Rokan Hilir, Propinsi Riau, di bawah wilayah pengelolaan Dinas Kehutanan dan Perkebunan Kabupaten Rokan Hilir dan Dinas Kehutanan Propinsi Riau. Luas Total areal PT. DRT adalah sebesar 90.956 ha dengan topografi terdiri atas dataran rendah pantai dengan ketinggian 28 meter dari permukaan laut (mdpl) yang pada umumnya merupakan daerah lahan basah dengan kelerengan di bawah 8%. Tanah yang dominan adalah tanah gambut ombrogen, dimana penggenangan air berasal dari air hujan yang miskin hara. Terdapat sedikit tanah gley, aluvial dan podzolik di bagian Utara dan Timur yang merupakan habitat hutan mangrove. Formasi geologi areal hutan terdiri atas sedimen aluvial tersier dan kwarter. Curah hujan rata-rata adalah 2.358 mm/th dengan kisaran 51 mm pada bulan Maret sampai 302 mm di bulan November. Suhu berkisar antara 25°-27° C dengan kelembaban nisbi berkisar antara 79-90%. ...
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Judul: Kerusakan Tegakan Tinggal Akibat Pemanenan Kayu di PT. Diamond Raya Timber, Provinsi Riau
Abstrak: In the activities of the utilization of the peat swamp forests, not separated in the harvesting of the forest activities. As for the impact of harvesting activities which could result in damage to the forest was living that threaten the sustainability of the forest. Although timber harvesting is carried out carefully, damage the difficult lives residual stands are avoided. Residual stand damage to the forest lived is happening on the part of the forest which is actually not included in plans for harvested at the time of harvesting is done. This research aims to quantify residual stand damage caused by wood harvesting in peat swamp forest. The method of the research is to measure the stand damage after felling and skidding operation at 6 sample plot which 1 hectare in each plot. The percentage and the level of tree damage were calculated through comparing the number of tree damage after logging with the number of tree before logging. The result of the study showed that the type of damage was crown damage, bark injury, buttress root damage, broken stem and fell. Residual stand damage caused by harvesting in Diamond Raya Timber forest company include medium damage, it was 41,14%. The percentage of stand damage caused by felling was 20,61% and the percentage of stand damage caused by skidding was 20,53%.
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Judul: Alternatif Media Kultur dan Model Infeksi Leucocytozoon caulleryi Menggunakan Telur Embrio Tertunas.
Abstrak: This research was designed to understand utilization of embryonated egg as cultivation media and infection model of parasite Leucocytozoon caulleryi. An examination included percentage of parasitemia and leukocyte differential of chicken embryo. This research used 24 embryonated egg which were inoculated with gametocytes of L. caulleryi via chorioallantoic membrane (CAM) and allantoic cavity (AC) route. Inoculation were done at 13 days old and blood smear of embryo were done at 16, 17,18, and 19 days old. The result showed significant different of inoculation route and each embryonated egg’s age. Inoculation route via CAM showed higher parasitemia than AC. The highest of parasitemia were showed at 19 days old of embryonated egg (6 days post-inoculation) both CAM and AC. Percentage of leukocyte differential showed significant different of both inoculation route and embryo’s egg on 16, 17, 18, and 19 days old. Both CAM and AC route showed same percentage of lymphocyte as the highest percentage followed by heterophil, monocyte, basophil, and eosinophil. Thus, embryonated egg could be used as alternative cultivation media with chorioallantoic membrane as better inoculation route and infection model which was showed by imune response from leukocyte differential.
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