Judul: Model persamaan alometrik massa karbon akar dan root to shoot ratio biomassa dan massa karbon pohon Mangium (Acacia mangium Wild): studi kasus di BKPH Parung Panjang, KPH Bogor, Perum Perhutani unit III, Jawa Barat dan Banten
Abstrak: Climate change is one of the current important environmental problems due to global warming which is caused by the increase of green house gasses concentration in the atmosphere. Through the process of photosynthesis, vegetation absorbs carbon and releases the carbon through the process of respiration. In this process, vegetation uses CO2 for the process of photosynthesis and produces O2 and energy. Some energy is stored in form of biomass. Acacia mangium is a tree species that belong to fast growing species and it is estimated to have high capability to absorb carbon. Therefore the planting of A. mangium is an important mitigation effort to reduce CO2 concentration in the atmosphere. This study had objective to obtain the model of allometric equations for the mass of tree roots of A. mangium, root to shoot ratio of biomass and carbon mass of A. mangium trees. Selection of sample trees on each dimater class was carried out by purposive sampling method. Estimation of carbon mass was applied for each part of tree consisting of roots, stems, twigs, branches, and leaves. Laboratory works were conducted for the tree samples to identify carbon content of every part of the trees. The model of allometric equation for A. mangium roots carbon mass to the diameter of trees was CA = 0,0048977D2,56 and the model of allometric equation for A. mangium roots biomass to the diameter of trees was WA = 0,00134896D2,46. The models of allometric equations for carbon mass of A. mangium tree roots to above ground biomass of tree carbon were as follows: root carbon mass to the carbon mass of stem was CA = 0,176197MB1,05, root carbon mass to the carbon mass of branches was CA = 11,74897MC0,418, root carbon mass to the carbon mass of twigs was CA = 1,706082MR1,08, root carbon mass to the carbon mass of leaves was CA = 1,261827MD1,33. Meanwhile, the model of estimation of root carbon mass to the mass of above ground trees was CA = 0,103038MT1,07 Root to shoot ratios of A. mangium tree biomass to the above ground biomass of trees were the followings; (a) root to shoot ratio of tree root biomass to the biomass of tree stem was 0,2934. (b) root to shoot ratio of tree root biomass to the biomass of all tree parts was 0.2080.Root to shoot ratios of carbon mass of A. mangium were as follows: (a) root to shoot ratio of carbon mass of tree root to the carbon mass of tree stem was 0.2437. (b) root to shoot ratio of carbon mass of tree root to the carbon mass of all above ground tree parts was 0.1952.
Keyword: 

Judul: Persamaan Alometrik Biomassa dan Massa Karbon Akar Pohon Hutan Alam Tropika di Areal IUPHHK-HA PT. Suka Jaya Makmur, Kabupaten Ketapang, Provinsi Kalimantan Barat.
Abstrak: Main factor which is considered of global warming is increasing concertration of greenhouse gases (GHG) emissions in the atmosphere. Plants have the ability to absorb CO2 from the atmosphere into useful energy through the process of photosynthesis. This process produces the O2 and energy, and some of the energy stored in the form of biomass. Natural tropical forest is one of the forest type that can absorb CO2 well, so its potential to savings carbon. The goal of this research is to get the allometric equation and tree roots of biomass and carbon mass of natural tropical forest in IUPHHK-HA PT Suka Jaya Makmur areas. Selection of sample trees on each class has been done by a purposive sampling and carbon content analysis of sample materials are conducted in the laboratory of wood chemistry in the totally of forestry, IPB. The best equation of allometric was selected based on the highest R2(adj) and the smallest standard deviation (s). Allometric equation model of tree roots biomass allometric relationship with root diameter, trees highest, and biomass of roots of the tree above the ground are as follows : BA = 0,0162 D2,55, BA = 0,0398 D3,39 T-1,24, BA = 0,1510 BB1,14, BA = 0,9397 BC1,10, BA = 2,5351 BD1,11, BA = 0,0691 BT1,14. Allometric equation model of tree roots carbon mass with diameter, tree height and with carbon mass of tree above ground are as follows : CA = 0,0089 D2,58, CA = 0,0229 D3,47 T-1,31, C = 0,1545 CB1,08, CA = 0,9440 CC1,12, CA = 2,5704 CD1,14, CA = 0,0741 CT1,14. T-student test results of tree roots carbon mass equations of tree roots carbon mass with the mass carbon of parts of the tree above the ground, and equations of tree roots carbon mass with diameter and height of the tree, shows that the results are not different.
Keyword: 

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.
Keyword: