Judul: Pemberian kombinasi jerami, pupuk daun silika, dan insektisida terhadap pertumbuhan dan produksi padi, serta sifat kimia Latosol Situ Gede, Dramaga, Bogor
Abstrak: Rice is the major carbohydrate source for Indonesian. Rice demand as staple food increase continuously, so it an effort to increase rice production is needed. The objectives of this research was to examine the application of straw, foliar silica fertilizer, insecticide, and their combinations on growth, yield, and nutrient uptake of rice plant, also soil chemical properties of Latosol Situ Gede, Dramaga, Bogor. This research used randomized block design (RBD) with nine treatment combinations and three replications, namely T0 (Control), T1 (NPK), T2 (NPK + Foliar Silica Fertilizer), T3 (NPK + Insecticide), T4 (NPK + Foliar Silica Fertilizer + ½ Insecticide), T5 (½ NPK + Straw), T6 (½ NPK + Straw + Foliar Silica Fertilizer), T7 (½ NPK + Straw + Insecticide), and T8 (½ NPK + Straw + Foliar Silica Fertilizer + ½ Insecticide). The results showed that the treatment of inorganic fertilizer and rice straw material combined with foliar silica fertilizer and or pesticide showed significantly higher effect compared with Control (unfertilized plot or no pesticide plot, T0), but among the treatments did not indicate significant difference. Generally, the effect of NPK treatments (T1-T4) on the number of filled rice grains per panicle, the weight of rice grains, N, P, K, Si uptake of rice plant, soil organic C, exchangeable potassium, and soil available Si were not significant difference with the treatments of 1/2NPK+rice straw (T5-T8). This showed that the application of rice straw could substitute 50% of inorganic fertilizer (NPK). Total- N, available-Si, and K uptake tended to be higher in the treatments of compared with the treatments of NPK.
Keyword: Bogor Agricultural University (IPB), yield., straw, foliar silica fertilizer, rice plant, insecticide

Judul: The Effect Application of Solid Silica and Liquid Silica Fertilizer on Growth and Productivity of IPB 3S Rice Variety
Abstrak: Silika merupakan hara fungsional yang terdapat banyak dilapisan bumi, tetapi umumnya dalam kondisi yang tidak tersedia bagi tanaman. Padi termasuk tanaman yang mengakumulasi silika dalam jumlah yang besar dibandingkan dengan dengan tanaman lain. Tujuan penelitian ini adalah mempelajari peran pupuk silika dan menentukan dosis yang tepat untuk meningkatkan pertumbuhan dan produktivitas padi varietas IPB 3S. Penelitian ini dilakukan di Kebun Percobaan Sawah Baru, IPB pada bulan April sampai September 2019. Percobaan menggunakan Rancangan Kelompok Lengkap Teracak (RKLT) dengan 7 Perlakuan meliputi kontrol, pupuk silika padat 500 kg ha-1, pupuk silika padat 1.000 kg ha-1, pupuk silika padat 1.500 kg ha-1, pupuk silika cair 1,5 L ha-1, pupuk silika cair 3 L ha-1, pupuk silika cair 4,5 L ha-1. Pertumbuhan dan hasil tanaman padi varietas IPB 3S terbaik pada pemberian pupuk silika padat 1.500 kg ha-1 atau pupuk silika cair 4,5 L ha-1. Hasil penelitian menunjukkan aplikasi pupuk silika meningkatkan panjang malai, jumlah anakan produktif, bobot 1.000 butir, jumlah gabah permalai, persentase gabah isi serta menurunkan sudut daun bendera., Silica is a functional nutrient that has many lines of the earth, but generally in condition that are not available for plants. Rice plants has accumulated silica in large quantities compared to other crops. This research to learn the role of silica fertilizer and determine the appropriate dose to increase the grwoth and yield of IPB 3S rice variety. The research conducted at Sawah Baru experimental field of IPB Dramaga, Bogor on April until September 2019. The research used randomized complete group design (RKLT), while the treatment on the research has 7 treatment (untreated, solid silica fertilizer 500 kg ha-1, solid silica fertilizer 1000 kg ha-1, solid silica fertilizer 1500 kg ha-1, liquid silica fertilizer 1.5 L ha-1, liquid silica fertilizer 3 L ha-1, liquid silica fertilizer 4.5 L ha-1). The result showed application of silica fertilizer increase panicle lenght, number of productive tillers, 1.000 grain weight, grain per panicle, precentage of grain content and decrease the second leaf angle.
Keyword: optimum yield, fertilizer respon, silica

Judul: Embriogenesis ikan buta (Astyanax fasciatus)
Abstrak: Ikan buta Astyanax fasciatus adalah spesies ikan unik dari famili Characidae yang menempati perairan dalam gua di Wilayah La Cueva Chica-San Luis Potasi-Mexico. Ikan ini memiliki mata yang tereduksi (Blind Cavefish) dan warna kulit merah muda, pucat serta mengkilap.
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