Judul: The study of root to shoot ratio biomass and carbon mass of rubber tree at community rubber forest of bungku village, jambi province
Abstrak: Penelitian ini bertujuan mencari nisbah biomassa akar pohon terhadap biomassa pohon karet dan nisbah massa karbon akar pohon terhadap massa karbon pohon karet di Hutan Karet Rakyat (HKR) Desa Bungku, Provinsi Jambi. Penyusunan Root to Shoot Ratio (R/S Ratio) menggunakan metode destruktif terhadap 30 pohon karet contoh yang dipilih dengan metode purposive sampling dan 6 pohon karet untuk uji validasi keandalan. Penelitian menghasilkan R/S Ratio biomassa pohon karet, yaitu: R/S biomassa akar terhadap biomassa batang utama berkisar 0.1757 sampai 0.3335 atau rata-rata 0.2562. R/S biomassa akar terhadap biomassa pohon di atas tanah berkisar 0.1361 sampai 0.2341 atau rata-rata 0.1927. R/S biomassa akar terhadap biomassa batang bebas cabang berkisar 0.2128 sampai 0.4078 atau rata-rata 0.2988. R/S Ratio massa karbon pohon karet, yaitu: R/S massa karbon akar terhadap massa karbon batang utama berkisar 0.1141 sampai 0.2035 atau rata-rata 0.1634. R/S massa karbon akar terhadap massa karbon pohon di atas tanah berkisar 0.0946 sampai 0.1728 atau rata-rata 0.1325. R/S massa karbon akar terhadap massa karbon batang bebas cabang berkisar 0.1434 sampai 0.2462 atau rata-rata 0.1906., The research aimed to obtain the ratio of root biomass to rubber tree biomass and ratio of root carbon mass to the rubber tree carbon mass at community rubber forest of Bungku Village, Jambi Province. The development of the root to shoot ratio (R/S Ratio) used a destructive method, using 30 samples of rubber trees which were selected by purposive sampling method. Moreover, 6 rubber trees were used for reliability validation test. The study results of R/S ratio of rubber trees biomass were: R/S root biomass to tree main stem biomass ranged between 0.1757 and 0.3335 or average 0.2562. R/S root biomass to tree biomass above the ground ranged between 0.1361 and 0.2341 or average 0.1927. R/S root biomass to clear bole stem biomass ranged between 0.2128 and 0.4078 or average 0.2988. R/S ratio of rubber trees carbon mass was as follows: R/S root carbon mass to tree main stem carbon mass ranged between 0.1141 and 0.2035 or average 0.1634. R/S roots carbon mass to tree above the ground carbon mass ranged between 0.0946 and 0.1728 or average 0.1325. R/S root carbon mass to clear bole stem carbon mass ranged between 0.1434 and 0.2462 or average 0.1906.
Keyword: Biomassa, Massa Karbon, Root to Shoot Ratio

Judul: Nisbah Akar – Pucuk Biomassa dan Massa Karbon Pohon Di Areal IUPHHK-HA PT. Suka Jaya Makmur, Ketapang, Provinsi Kalimantan Barat
Abstrak: Root to shoot ratio (R/S Ratio) of dominant tree biomass in tropical rain forests (especially IUPHHK-HA PT. Suka Jaya Makmur West Kalimantan) is as follows: (a) R/S root biomass with the main stem biomass ranged between 0.1743 to 0.4828 with an average value of 0.3006. (b) R/S root biomass to above-ground tree biomass (trunks, branches, twigs, and leaves) ranged from 0.1376 to 0.3983 with an average value of 0.2475. Root to shoot ratio (R/S ratio) of carbon mass of the dominant trees are as follows: (a) R/S carbon mass of roots with carbon mass of the main stem ranged from 0.1724 to 0.4593 with an average value of 0.3. (b) R/S carbon mass of tree roots with carbon mass of above the ground ranged from 0.1361 to 0.3951 with an average value of 0.2496. The average value of biomass expansion factors (BEF) of above ground and total of tree is 1.2392 and 1,5398. The average tree carbon mass expansion factor of above ground and total tree is 1.2304 and 1,5305 (Based on data from the dominant trees in IUPHHK-HA PT. Suka Jaya Makmur West Kalimantan).
Keyword: BEF., Root to Shoot Ratio, Carbon Mass, Biomass

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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