Judul: Keragaan Pertumbuhan Padi Genotipe F1 Dan Galur Tetua Pada Kondisi Tercekam Suhu Tinggi
Abstrak: Percobaan dilaksanakan di rumah kaca Kebun Percobaan University Farm IPB, Cikabayan, Dramaga, Bogor. Tujuan Penelitian untuk mendapatkan informasi tentang keragaan karakter pertumbuhan genotipe F1 padi dan seluruh tetuanya pada kondisi cekaman suhu tinggi. Rancangan yang digunakan adalah rancangan acak lengkap dengan 3 ulangan. Bahan tanam yang digunakan adalah varietas padi sebagai tetua yaitu Mekongga, Situ Patenggang, IPB 6R, Marinah, IR64, dan IPB 4S serta 9 genotipe F1 yang dihasilkan melalui persilangan antara tetua yaitu Marinah x Mekongga, IR64 x Mekongga, IPB 4S x Mekongga, IPB 6R x Situ Patenggang, Marinah x Situ Patenggang, IR64 x Situ Patenggang, IPB 4S x Situ Patenggang, Marinah x IPB 6R, IR64 x IPB 6R. Peubah yang diamati adalah tinggi tanaman 45 hari setelah semai (HSS), tinggi tanaman 110 HSS, kehijauan daun 45 HSS, kehijauan daun 110 HSS, jumlah anakan total, jumlah anakan produktif, umur heading, umur berbunga, umur panen, panjang malai, jumlah gabah hampa, jumlah gabah bernas, jumlah gabah total, persen gabah hampa, bobot gabah bernas, dan bobot 1000 butir. Hasil genotipe menunjukkan dampak yang signifikan terhadap tinggi tanaman 110 HSS, kehjauan daun 110 HSS, jumlah anakan total, jumlah anakan produktif, umur panen, panjang malai, jumlah gabah hampa, jumlah gabah bernas, jumlah gabah total, persen gabah hampa, bobot gabah bernas, dan bobot 1000 butir. Hasil penelitian menunjukkan bahwa ada perbedaan rerata tinggi tanaman 110 HSS, kehjauan daun 110 HSS, jumlah anakan total, jumlah anakan produktif, umur panen, panjang malai, jumlah gabah hampa, jumlah gabah bernas, jumlah gabah total, persen gabah hampa, bobot gabah bernas, dan bobot 1000 butir antara genotipe yang diamati . IPB 6R, Marinah, dan IPB 4S merupakan penggabung terbaik untuk karakter yang diamati pada kondisi suhu tinggi.
Keyword: F1, padi, kondisi, suhu tinggi

Judul: Respon Pertumbuhan Beberapa Genotipe F1 Padi (Oryza sativa L.) terhadap Cekaman Suhu Tinggi
Abstrak: The experiment was conducted on Maret to June 2014 at the Experimental Farm Bogor Agricultural University, Cikabayan, Dramaga, Bogor. The purpose of research was to observation the effect of high temperature on the crossing-genotypes, got the tolerant crossing-genotypes, and created the genotype that has the best heterosis and heritability value. In this research, there are 4 the crossing-genotypes that tolerant in high temperature, namely: IPB 4S x Situ Patenggang Marinah x IPB 6R, IPB 4S x IPB 6R, and IPB 4S x IR64. The result of research showed that the number of total tillers, productive tillers, the number of filled out stalks, the mass of filled out/plant, the mass of empty stalks/plant, the total mass of stalks, and the mass of thousand grain was very significantly different for all of genotypes. The number of tillers total 45 DAP (days after planting), the age of flowering, the age of harvesting, the number of empty stalks, and the percentage of filled out stalks was significantly different for all of genotypes. The height of plant 45 DAP and harvesting, the greening of leaf 45 DAP and harvesting, the capacity period, the height of panicle, and the number of stalks total was not significantly different.
Keyword: Bogor Agricultural University (IPB), heritability, the productive tiller, plant height

Judul: The Solution of Nonlinear Volterra Integral Equation using Linearization Method.
Abstrak: Many natural phenomena can be explained by mathematical models. One of those models is in the form of Volterra integral equation, which is usually nonlinear. Analitically, a nonlinear form is difficult to solve. Therefore, this research is aimed to discuss solution of Volterra integral equation using linearization method. Linearization is done to nonlinear integrand with Taylor series expansion. According to this linearization, a numerical solution of Volterra integral equation is obtained using MATLAB 7.0.1 software. Validity of this method is tested by comparing the approximate with the exact solution. The result of this research shows that the numerical solution agree with the exact solution quite well.
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