Judul: Pengaruh Pemberian Kompos terhadap Pertumbuhan Bibit Ylang Ylang (Cananga odorata forma genuina).
Abstrak: Tingginya nilai ekonomi minyak ylang ylang mendorong beberapa pengusaha untuk mengembangkan tanaman ylang ylang di Indonesia, terutama dalam hal peningkatan produktivitasnya. Penelitian ini bertujuan untuk mengetahui pengaruh pemberian dua jenis kompos komersial serta menentukan ukuran dosis optimal terhadap pertumbuhan bibit ylang ylang. Penelitian dilaksanakan melalui beberapa tahapan yaitu pengadaan bibit, penyapihan, pemeliharaan, pengamatan dan pengambilan data, rancangan percobaan, hipotesis dan analisis data. Penggunaan dua jenis kompos dengan empat dosis yang digunakan berpengaruh nyata terhadap parameter tinggi bibit ylang ylang. Hasil skoring dosis kompos menunjukkan bahwa penggunaan dosis sebanyak 25 g mampu meningkatkan pertumbuhan bibit ylang ylang lebih baik dibandingkan dosis lain.
Keyword: komersial, kompos, ylang ylang

Judul: Respons Pertumbuhan Tanaman Ylang-ylang (Cananga odorata forma genuina) terhadap Pemupukan dan Aplikasi Ekoenzim di Lapangan
Abstrak: Tanaman ylang-ylang merupakan salah satu komoditi yang menjanjikan secara ekonomi dengan memanfaatkan bagian bunga sebagai bahan baku pembuatan minyak wangi. Optimalisasi produksi bunga tanaman ylang-ylang dapat dilakukan dengan meningkatkan produksi tunas dan pertumbuhan tanaman melalui pemupukan. Tujuan penelitian ini adalah menganalisis respons pertumbuhan dan produksi tunas tanaman ylang-ylang terhadap pemberian pupuk NPK, pupuk kandang, dan ekoenzim di lapangan. Tanaman ylang-ylang yang digunakan berumur 1 tahun. Hasil penelitian ini menunjukkan bahwa perlakuan pemberian pupuk dan ekoenzim berpengaruh nyata terhadap jumlah daun dan tinggi tunas, namun tidak berpengaruh nyata terhadap pertumbuhan diameter, tinggi tanaman, dan jumlah tunas ylang-ylang. Pertumbuhan jumlah daun ylang-ylang terbesar terdapat pada perlakuan kombinasi pupuk NPK + pupuk kandang + ekoenzim dibandingkan dengan perlakuan lainnya. Tinggi tunas ylang-ylang terbesar terdapat pada perlakuan kombinasi pupuk NPK + pupuk kandang + ekoenzim dibandingkan dengan perlakuan lainnya. Kombinasi perlakuan NPK, pupuk kandang, dan ekoenzim dapat digunakan dalam meningkatkan pertumbuhan dan tinggi tunas tanaman ylang-ylang., Optimization of flower production of ylang-ylang plants can be done by increasing shoot production and plant growth through fertilization. The objective of this study was to analyze the response of shoot production and growth of ylang-ylang plants to the application of inorganic (NPK) and organic fertilizers (manure and eco-enzyme) in the field. The ylang-ylang plant used was 1 year old. The results showed fertilizers and eco-enzyme treatment significantly affected the number of leaves and shoot height, but did not significantly affect the growth of diameter, plant height, and the number of ylang-ylang shoots. The highest number of ylang-ylang leaves was found in the combination treatment of NPK fertilizer + manure + eco-enzyme compared to other treatments. The highest ylang-ylang shoot height was found in the combination treatment of NPK fertilizer + manure + eco-enzyme compared to other treatments. The combination of NPK treatment, manure, and eco-enzyme can be used to increase the growth and shoot height of ylang-ylang plants.
Keyword: diameter, manure, NPK fertilizer, shoot height, shoot production

Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4