Judul: Cultivation of Two Edible Mushrooms on Wood and Branches of Sengon (Paraserianthes falcatraria), Moringa (Moringa oleifera), and Kicopong (Cecropia peltata) Branches., Cultivation of Two Edible Mushrooms on Wood and Branches of Sengon (Paraserianthes falcatraria), Moringa (Moringa oleifera), and Kicopong (Cecropia peltata) Branches.
Abstrak: Jamur tiram (Pleurotus ostreatus) dan jamur kuping (Auricularia auricula) termasuk jenis jamur pangan yang banyak dibudidayakan. Saat ini, dibandingkan jenis kayu sengon (Paraserianthes falcataria), kayu kelor (Moringa oleifera), dan kayu kicopong (Cecropia peltata) merupakan jenis kayu yang penggunaannya masih cukup rendah. Penelitian ini bertujuan menganalisis potensi kayu sengon, kelor, dan kicopong (batang dan ranting) untuk kultivasi jamur tiram dan jamur kuping. Penelitian menggunakan rancangan acak lengkap (RAL) dengan dua faktor yaitu jenis media dan jenis jamur. Jenis media adalah log dan ranting serta baglog sebagai pembanding. Hasil penelitian menunjukkan bahwa jamur yang dikultivasi pada media baglog memiliki hasil yang tertinggi dibanding log dan ranting. Jika dilihat dari media batang dan ranting, ketiga jenis kayu memiliki potensi yang baik sebagai media kultivasi jamur, dengan kicopong sebagai media terbaik. Hama dan penyakit yang cenderung mengganggu pertumbuhan kultivasi jamur adalah jenis Stemonitis sp. dan Corpinus sp., Oyster mushrooms (Pleurotus ostreatus) and ear mushrooms (Auricularia auricula) are among the most widely cultivated types of food mushrooms. At present, compared to sengon wood (Paraserianthes falcataria), kelor (Moringa oleifera), and kicopong (Cecropia peltata) wood are types of wood whose usage is still quite low. This study aims to analyze the potential of sengon, moringa, and kicopong (logs and twigs) wood for the cultivation of oyster mushrooms and ear mushrooms. The study used a completely randomized design (CRD) with two factors, namely the type of media and the type of fungus. Types of media are logs and branches and baglogs for comparison. The results showed that fungi cultivated on baglog media had the highest yield compared to fungi that were cultivated on logs and twigs. When viewed from the stem and twig media, the three types of wood have good potential as a medium for mushroom cultivation, with kicopong as the best medium. Pests and diseases that tend to interfere with the growth of fungal cultivation are Stemonitis sp. and Corpinus sp.
Keyword: Auricularia auricula, Cecropia peltata, Moringa oleifera, Paraserianthes falcataria, Pleurotus ostreatus

Judul: Pengaruh Serbuk Sengon, Daun Jati, dan Tandan Kosong Kelapa Sawit (TKKS) terhadap Kultivasi Jamur Tiram (Pleurotus spp.)
Abstrak: Jamur tiram (Pleurotus spp.) merupakan salah satu jenis jamur kayu yang banyak dikonsumsi masyarakat karena memiliki kandungan gizi yang tinggi. Limbah serbuk sengon, kelapa sawit dan serasah daun jati menjadi alternatif sebagai media tanam dalam kultivasi jamur tiram. Penelitian ini bertujuan mempelajari pertumbuhan dan produksi jamur tiram (Pleurotus spp.) pada media yang mengandung serbuk sengon, daun jati, dan Tandan Kosong Kelapa Sawit (TKKS). Metode yang digunakan adalah Rancangan Acak Lengkap Faktorial (RALF). Faktor pertama terdiri atas jamur tiram cokelat dan merah, faktor kedua terdiri atas 6 komposisi media. Hasil penelitian menunjukkan formula 2 (serbuk sengon 1860 g + daun jati 300 g) memberikan pengaruh terbaik pada fase vegetatif dengan rata-rata pertumbuhan miselium 0,75 cm/hari. Fase generatif paling baik dalam 2 kali panen diperoleh formula 4 (serbuk sengon dengan TKKS 1:2) yaitu 9 hari. Total bobot basah tertinggi diperoleh formula 4 yaitu 103,39 g dengan nilai efisiensi biologis 53,28%. Hama dan penyakit yang ditemukan adalah tungau, Collembola, dan Trichoderma sp. Kata kunci: budi daya, limbah, media, pertumbuhan, produktivitas ABSTRACT RIZAL LUL GODI. Effect of Sengon Powder, Teak Leaves, and Empty Bunches of Oil Palm (EBOP) on Cultivation Oyster Mushroom (Pleurotus spp.). Supervised by ELIS NINA HERLIYANA and LUFTHI RUSNIARSYAH. Oyster mushroom (Pleurotus spp.) is a type of wood mushroom that is widely consumed by the public because it has a high nutritional content. Waste of sengon powder, oil palm and teak leaf litter is an alternative as a growing medium in the cultivation of oyster mushrooms. This study aims to study the growth and production of oyster mushrooms (Pleurotus spp.) on media containing sengon powder, teak leaves, and Empty Bunches of Oil Palm (EBOP). The method used is the Factorial Complete Randomized Design (FCRD). The first factor consists of brown and red oyster mushrooms, the second factor consists of 6 media compositions. The results showed that formula 2 media (sengon powder 1860 g + teak leaves 300 g) had the best influence with an average growth of mycelium of 0,75 cm/day. The generative phase that requires the shortest harvest period in formula 4 media (sengon powder with EOPB 1:2) is 9 days. The highest total wet weight of the fungus was obtained in formula 4 media, which was 103,39 g with a biological efficiency value of 53,28%. Pests and diseases found are mites, Collembola, and Trichoderma sp. Keywords: cultivation, growth, media, productivity, waste
Keyword: ultivation, growth, media, productivity, waste

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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