Judul: Application of Growth Regulator Naphthalene Acetic Acid (NAA) on Growth and Production of Aglaonema Shoot Cuttings
Abstrak: Aglaonema merupakan tanaman hias famili Araceae. Perbanyakan pada aglaonema umumnya dilakukan menggunakan setek. Kendala perkembangbiakan menggunakan setek adalah pembentukan tunas dan pertumbuhan akar yang lambat. Upaya untuk mempercepat tumbuhnya akar dengan menambahkan ZPT jenis auksin. Penelitian ini bertujuan mendapatkan konsentrasi optimum dari zat pengatur tumbuh NAA terhadap pertumbuhan dan produksi aglaonema melalui metode perbanyakan setek pucuk. Penelitian dilakukan di Mekar Hurip Nursery, Desa Sukamantri, Kecamatan Tamansari, Kabupaten Bogor, Jawa Barat pada bulan Desember 2023 hingga Maret 2024. Rancangan percobaan penelitian yang digunakan RKLT faktorial dengan dua faktor. Faktor pertama ZPT NAA dan BAP dengan empat taraf (kontrol, 75 dan 150 ppm, 150 dan 150 ppm, 200 dan 150 ppm), sedangkan faktor kedua adalah kultivar aglaonema dengan empat taraf (Siam Aurora, Snow White, Sultan Brunei, dan Big Roy). Terdapat 16 kombinasi dengan lima ulangan dan setiap percobaan terdiri dari tiga tanaman. Data hasil pengamatan dianalisis menggunakan Microsoft Excel dan SAS menggunakan uji ragam F, apabila terdapat pengaruh nyata dilanjutkan uji lanjut menggunakan DMRT taraf a = 5%. Konsentrasi ZPT NAA yang menghasilkan pertumbuhan optimum yaitu 218 ppm pada kultivar Big Roy, 155 ppm pada kultivar Snow White, 102,25 ppm pada kultivar Sultan Brunei, dan 95,84 ppm kultivar pada Siam Aurora., Aglaonema is an ornamental plant of the Araceae family. The propagation of aglaonema typically involves using cuttings. The constraints of propagation using cuttings are the formation of shoots and slow root growth. Accelerate root growth by adding plant regulator type auxin. This study aims to obtain the optimum concentration of NAA growth regulator on the growth and production of aglaonema through the shoot cuttings propagation method. The research was conducted at the Mekar Hurip Nursery, Sukamantri Village, Tamansari District, Bogor Regency, West Java, from December 2023 to March 2024. The research experimental design used RKLT factorial with two factors. The first factor was NAA and BAP with four levels (control, 75 and 150 ppm, 150 and 150 ppm, 200 and 150 ppm), while the second factor was aglaonema cultivars with four levels (Siam Aurora, Snow White, Sultan Brunei, and Big Roy). There were 16 combinations with five replications; each experiment consisted of three plants. Observation data were analyzed using Microsoft Excel and SAS using the F test of variance to determine if there was a significant effect, followed by further tests using DMRT at the a = 5% level. The concentration of ZPT NAA that produces optimum growth is 218 ppm on the Big Roy cultivar, 155 ppm on the Snow White cultivar, 102.25 ppm on the Sultan Brunei cultivar, and 95.84 ppm on the Siam Aurora cultivar.
Keyword: Araceae, auxin, budding, ornamental plants, root

Judul: Growth of Aglaonema Siam Aurora Stem Cuttings at Various IBA Auxin Concentrations and Combinations of Planting Media
Abstrak: Aglaonema Siam Aurora termasuk jenis Aglaonema berdaya tarik tinggi karena motif daunnya unik seperti bibir diberi lipstik. Budidaya Aglaonema perlu dioptimalkan dengan melakukan perbanyakan. Penelitian bertujuan mempelajari konsentrasi optimum indole butyric acid (IBA) dan kombinasi media tanam terhadap pertumbuhan stek pucuk Aglaonema Siam Aurora. Penelitian dilakukan di Mekar Hurip Nursery, Kabupaten Bogor bulan Februari-Juli 2023. Penelitian menggunakan rancangan faktorial RKLT. Faktor pertama adalah konsentrasi IBA empat taraf yaitu 0 ppm (B0), 250 ppm (B1), 300 ppm (B2), 350 ppm (B3). Faktor kedua adalah kombinasi media tanam tiga taraf yaitu kompos daun bambu : sekam bakar : fermentasi sekam mentah 3:1:1 (M1), pasir malang : sekam bakar : fermentasi sekam mentah 3:1:1 (M2), cocopeat : sekam bakar : fermentasi sekam mentah 3:1:1 (M3). Percobaan terdiri dari 12 kombinasi perlakuan, tiga ulangan. Satuan percobaan terdiri dari lima tanaman sehingga total terdapat 180 satuan amatan. Data dianalisis menggunakan uji-F, perlakuan berbeda nyata diuji lanjut DMRT taraf α 5%. Pemberian IBA meningkatkan pertumbuhan panjang, lebar, luas daun, panjang tanaman, dan jumlah akar. Penggunaan media tanam dengan komposisi kompos daun bambu : sekam bakar : fermentasi sekam mentah 3:1:1 meningkatkan panjang, luas, dan jumlah daun serta jumlah dan panjang akar. Komposisi cocopeat : sekam bakar : fermentasi sekam mentah 3:1:1 meningkatkan jumlah akar, panjang, lebar, luas dan jumlah daun Aglaonema Siam Aurora., Aglaonema Siam Aurora is a type of Aglaonema with high attractiveness because of its unique leaf motif, like lips covered in lipstick. Aglaonema cultivation needs to be optimized by propagation. The aim of this research was to study the optimum concentration of indole butyric acid (IBA) and the combination of planting media on the growth of Aglaonema Siam Aurora shoot cuttings. The research was conducted at Mekar Hurip Nursery, Bogor Regency in February to July 2023. The study used a factorial RKLT design. The first factor was the concentration of indole butyric acid (IBA) at four levels: 0 ppm (B0), 250 ppm (B1), 300 ppm (B2), 350 ppm (B3). The second factor was a combination of planting media at three levels, namely: bamboo leaf compost : roasted husks : raw husks 3:1:1 (M1), poor sand : roasted husks : raw husks 3:1:1 (M2), cocopeat : roasted husks : raw husks 3:1:1 (M3). The experiment consisted of 12 treatment combinations with three replications. The experimental unit consisted of five plants so that there were a total of 180 units of observation. Data were analyzed using the F-test and significantly different treatments were further tested with DMRT at 5% level. Giving IBA can increase the growth of length, width, leaf area, plant length, and number of roots. The use of planting media with the composition of bamboo leaf compost: roasted husks: fermented raw husks 3:1:1 increased the length, area and number of leaves as well as the number and length of roots. The composition of cocopeat : roasted husks : fermented raw husks 3:1:1 increased the number of roots, length, width, area and number of leaves of Aglaonema Siam Aurora.
Keyword: araceae, cocopeat, kompos daun bambu, tanaman hias daun, vegetatif

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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