Judul: Pertumbuhan dan Produksi Padi Varietas Jatiluhur dan IR64 pada Sistem Budidaya Gogo dan Sawah
Abstrak: The aim of this research was to determine the growth and production of two different rice varieties namely IR64 as lowland variety and Jatiluhur as upland variety that has been grown in the lowland and upland rice culture systems. This research was conducted from February to June 2012 in the green house of Sawah Baru Experimental Station, Bogor Agricultural University. This experiment used a splitplot design with three replications. Rice culture systems, namely lowland and upland systems were placed as main plot; whereas rice varieties, namely IR64 and Jatiluhur were placed as sub plot. Results showed that the treatment of cultivation system significantly affect the growth and production of rice. Treatment of varieties significantly affect the growth, but did not significantly affect on production. Interaction of culture systems and varieties generally affect the growth, but did not affect production of rice.
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Judul: Keragaan Agronomi Varietas Padi di Kabupaten Bogor dan Kabupaten Subang Menggunakan Sistem Tanam Jajar Legowo 4:1
Abstrak: Peningkatan produksi padi dapat dilakukan dengan penggunaan varietas unggul didukung oleh sistem budidaya yang tepat dan lingkungan yang sesuai. Lokasi atau lingkungan tumbuh yang berbeda memiliki perbedaan kondisi agroekosistem sehingga dapat menyebabkan pertumbuhan dan produksi yang berbeda pada varietas yang dibudidayakan. Penelitian ini bertujuan mengetahui pengaruh lokasi terhadap keragaan agronomi dan produktivitas beberapa varietas padi yang ditanam menggunakan sistem tanam jajar legowo 4:1. Varietas yang digunakan yaitu Inpari 32, Inpari 33, Inpari 43, IPB 3S, IPB 9G, dan Batang Piaman. Rancangan yang digunakan adalah Rancangan Kelompok Lengkap Teracak (RKLT) dengan satu faktor varietas, kemudian dilakukan analisis gabungan antar lokasi percobaan. Lokasi tanam berpengaruh terhadap jumlah anakan, jumlah malai per rumpun, jumlah gabah total per malai, jumlah gabah bernas total per malai, dan bobot gabah kering giling (GKG). Varietas unggul baru (VUB) yang meliputi Inpari 32, Inpari 33, dan Inpari 43 memiliki ciri-ciri jumlah anakan banyak dengan jumlah gabah per malai kategori sedikit dan sedang, sedangkan padi tipe baru (PTB) memiliki ciri-ciri jumlah anakan sedikit dengan jumlah gabah per malai kategori sedang. Jumlah anakan, jumlah malai per rumpun, dan jumlah gabah per malai akan berpengaruh pada produksi padi., The effort for Increasing rice production could be achieved by planting high yielding varieties supported by implementing an appropriate cultivation system and suitable growing environments. Differetnt location or growing environment have different agroecosystem conditions could be differences growth and production of cultivated varieties. This study aimed to determine the effect of different location on agronomic performance and productivity of several rice varieties grown using “jajar legowo 4:1” system. The varieties used were Inpari 32, Inpari 33, Inpari 43, IPB 3S, IPB 9G, and Batang Piaman. It was arranged in Randomized Complete Block Design (RCBD) of one factor, namely variety, then a combined analysis was carried out between the experimental locations. Planting location affected the total stem, total panicle per clump, total grain per panicle, total pithy grain per panicle, and dry milled grain weight (GKG). The new superior varieties (VUB) which include Inpari 32, Inpari 33, and Inpari 43 have the characteristics of a large number of tillers with the number of grain per panicle in the category of few and medium, while the new type of rice (PTB) has the characteristics of a small number of tillers with the number of grain per panicle medium category. The number of tillers, number of panicles per clump, and number of grain per panicle will affect rice production.
Keyword: Agroecosystem, high yielding varieties, productivity

Judul: Membran Komposit Kitosan-Zeolit untuk Aplikasi Direct Methanol Fuel Cell
Abstrak: Direct methanol fuel cell (DMFC) is a fuel cell that utilize methanol as the fuel source. The electrolyte membrane used in the DMFC system in this research was chitosan-zeolite composite membrane. The composite membrane was synthesized with chitosan-zeolite composition variation of 1:1, 1:2, 1:3, and 2:1. The membranes were analyzed by Fourier transform infrared spectrophotometer (FTIR) and scanning electron microscope, and for the specific gravity. Membrane performances were tested with methanol uptake, methanol permeability, conductivity, and potential difference in the DMFC system. The FTIR spectrum showed no formation of new functional groups inducating that the composite membrane was a result of physical mixing. Morphological analysis showed that the membrane was nonporous. Chitosan-zeolite 1:3 composite membrane had the highest specific gravity and methanol uptake, 1.4226 g/mL and 41.44%, respectively. The highest proton conductivity was showed by the 1:2 chitosanzeolite composite membrane, namely 7.2946× 10-7 S/cm. Based on this research results, chitosan-zeolite composite membrane can be applied in DMFC system.
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