Judul: Limbah Pemananen Kayu dan Massa Karbon Tersimpan pada Limbah Pemanenan Kayu di Perusahaan Pemanfaatan Kayu Kalimantan Timur
Abstrak: In order to achieve the sustainable forest management certification, a forest company PT Ratah Timber needs to identify the residue generated from logging, the exploitation factor, and the measurement of carbon mass stored on the logging residue. The measurement of logging residue were conducted on felling areas, landing site, and log yard. The logging residue was defined on stumps, main stems, upper stems, and branches with the minimum diameter of 5 cm. The mass of the carbon were obtained from laboratory analysis. The result showed that the logging residue on the felling area had the average number of 46.73 m³/ha (98.19%), 0.86 m³/ha (1.81%) at landing site, and 0 m³/ha (0%) at log yard, while the logging residue based on parts of the tree were 9.21 m³/ha stumps, 21.96 m³/ha main stems, 11.32 m³/ha upper stems, and 6.06 m³/ha branches. The exploitation factors in this research were calculated by taking into account the number of logging residue percentage, and using the felling index, skidding index, and hauling index approach, the result of the calculation showed that the exploitation factor were at the level of 0.69. These mass of carbon were stored inside the logging residue from the logging, with the approximate number of 33.49 ton C/10 ha.
Keyword: sustainable forest management, carbon mass, logging residue, exploitation factor

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: 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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