Judul: Komposisi Jenis dan Struktur Tegakan di Hutan Penelitian Haurbentes Jasinga, Kabupaten Bogor
Abstrak: The Haurbentes Special Purpose Forest Area which functioned as a reaserch forest has various types of stands. This study was purposed to obtain informations on the species composition and stand structure in Harbuentes Research Forest. Unit samples taken by using purposing sampling method on 20 ha Haurbentes forest area. Observed variables in this study are number of vegetation individuals for seedlings and saplings, also diameter and number of individuals vegetation level from trees which diameter greater than 10 cm in 10 m x 50 m pots with seedlings, saplings and tree measuring on each type. Estimation of forest stands potential calculated with Dipterocarpaceae volume estimation and Berkhout linier transformation equation. Based on the observation, biodiversity index forest (H') in Haurbentes Research Forest for all levels of growth were categorized as moderate classification since it had biodiversity index forest values between 1,5 to 3,5. The species richness for seedling and trees growth rate were categorized as low classification and the sapling growth rate were categorized as high classification. The highest number of plants was founded in sapling growth rate and the lowest number of plants was founded in seedling and trees growth rate, with the value of 20 species of seedling, 51 species of saplings and 15 species of trees. Species of Shorea mecistopteryx was the dominant species at every stages of growth because these species are found in large numbers and spread almost evenly throughout the area. The stand structure of Haurbentes Forest was characterized as the larger the size of the diameter of the rod the more reduced the number of individuals of the species (the inverted "J" letter curve graphic). Based on 2012 tree treatise at the Haurbentes research forest in the area of 20 ha were found 2987 trees. Total of Dipterocarpaceae wood volume potential obtained in Haurbentes research forest is 592,77 m3 or 29,64 m3/ha.
Keyword: stand structure, species composition

Judul: Struktur dan Potensi Tegakan Hutan Tanaman Meranti (Shorea spp.) di KHDTK Haurbentes Kabupaten Bogor
Abstrak: Structure and potency of forest stand meranti (Shorea spp.) in Forest Area with a Specific Purpose (FASP) Haurbentes is very interesting to be studied. FASP Haurbentes is a plantation forest area that built in 1940-1986. Variety compositions and vegetation covers of FASP Haurbentes are similar to the natural forest condition. Important Value Index (IVI) are used to measure the forest stand structure. IVI can be used to determine the compositions of vegetation type in various stage of growth level on the observation plots. Furthermore, forest stand potency needs to be estimated through volume estimation testing models that is already made. Research method use a line plots method. In the observation plots, forest stands structure in FASP Haurbentes forms an inverted J curve. Varieties that have the highest IVI in seedlings, saplings, poles and trees stage respectively are Shorea pinanga (47.1%), Shorea pinanga (80.1%), Shorea mecisopteryx (90.9%), and Shorea selenica (87.3%). Meranti Stands potency in FASP Haurbentes is in the amount of 434.66- 551.94 m3/ha. Meranti volume estimation model in FASP Haurbentes is V = 0.000234423 Dbh2.37.
Keyword: Bogor Agricultural University (IPB), volume equation, structure, potential, meranti

Judul: Pengaruh vaksin aktif dan inaktif terhadap kekebalan dalam pencegahan penyakit newcastle pada ayam
Abstrak: Penyakit Newcastle adalah penyakit yang bersifat infeksius dan kontagius yang menyerang unggas terutama ayam dan kalkun; menimbulkan kematian, penurunan produksi dan kwalitas telur sehingga menimbulkan kerugian ekonomi yang besar; disebabkan oleh paramyxovirus yang termasuk ke dalam golongan virus yang berinti asam ribonukleat. Virus penyebab penyakit ini terdiri atas beberapa galur yaitu velogenik, mesogenik dan lentogenik. Vaksinasi adalah salah satu cara untuk mencegah timbulnya penyakit dan kerugian yang ditimbulkannya. Vaksin terdiri atas vaksin aktif dan inaktif atau vaksin dalam emulsi minyak. Vaksinasi pada umur dini adalah cara yang paling baik dilakukan. Umur ayam yang tepat mulai dilaksanakan vaksinasi adalah pada umur 4 hari, karena pada saat ini titerantibodi asal induk sudah mulai turun dan kondisi ayam sudah mulai kuat untuk dilakukan vaksinasi jika melakukannya pada ayam umur sehari. ...
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