Judul: Pengaruh Zat Pengatur Tumbuh (BAP dan IAA) terhadap Pertumbuhan dan Perkembangan Cabai Keriting (Capsicum annuum L.) secara In Vitro
Abstrak: Curly red pepper (Capsicum annuum L.) is one of the crops that are important and widely cultivated in Indonesia. The purpose of this experiment was to determine the effect of the use of plant growth regulators BAP and IAA in various doses on the growth and development of curly red peppers in vitro. This research was conducted on March 2011 until October 2011 in Tissue Culture Laboratory Departement of Agronomy and Horticulture, Faculty of Agriculture, Bogor Agriculture University. This research using Randomized Complete Design (RAL) with one factor, was plant growth regulators. The results showed that administration of combinations of growth regulators significantly influenced root induction, high growth, number of leaves, callus and shoot multiplication. P3 was very good treatment in inducing roots. P9 treatment effect was very evident in the high growth and induction of shoots. P4 was the best treatment in an increasing number of leaves. while for callus and multiplication, the best treatment was a very real P16.
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Judul: Optimalisasi penggunaan bahan organik dan pupuk untuk stimulasi pertumbuhan dan produksi cabai merah Capsicum annuum L.
Abstrak: Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan berbagai taraf dosis bahan organik dan pupuk daun untuk stimulasi pertumbuhan dan produksi cabai merah (Capsicum annuum L.). Penelitian ini dilaksanakan di lahan Kebun Percobaan Leuwikopo IPB Darmaga, Kabupaten Bogor. Lokasi terletak pada ketinggian 250 m dari permukaan laut. Percobaan dimulai pada bulan Februari sampai dengan bulan Juni 2004. Percobaan ini menggunakan rancangan perlakuan faktorial disusun dalam Rancangan lingkungan Acak Kelompok. Faktor yang pertama adalah bahan organik terdiri dari 4 taraf (B0 = 0%, B₁= 25%, B2 = 50%, dan B3 = 75% volume media), dan faktor yang kedua adalah pupuk daun yang terdiri dari 4 taraf (Do = tanpa pupuk daun, D₁ = pemberian pupuk daun 1 g/l air, D₂ = pemberian pupuk daun 2 g/l air, dan D3 pemberian pupuk daun 3 g/l air). Kandungan bahan organik dalam media (4 liter) berdasarkan persentase volume. Dalam penelitian ini terdiri dari 16 kombinasi perlakuan diulang tiga kali dan setiap satu satuan percobaan terdiri dari lima tanaman sehingga seluruhnya terdiri dari 240 tanaman. Penggunaan bahan organik (pupuk kandang, kompos dan kasting) berpengaruh nyata terhadap tinggi tanaman pada umur 4 MST, dan berpengaruh sangat nyata pada umur 6 sampai dengan 10 MST. Penggunaan bahan organik juga memberikan pengaruh yang sangat nyata terhadap jumlah daun dan jumlah percabangan tanaman cabai pada umur 4 MST sampai dengan 10 MST. Penggunaan bahan organik dengan taraf 75% volume media memberikan hasil yang terbaik dibandingkan dengan ketiga perlakuan lainnya. ...
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Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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