Judul: Cultivation of White Oyster Mushrooms Using Empty Palm Oil Bunches and Sengon Sawdust and Adding Activators
Abstrak: MUHAMMAD REINALDO ASRAF MAHENDRA. Budi Daya Jamur Tiram Putih menggunakan Tandan Kosong Kelapa Sawit dan Serbuk Gergaji Sengon serta Tambahan Aktivator. Dibimbing oleh ELIS NINA HERLIYANA dan SUMINAR SETIATI ACHMADI. Limbah kayu dan tandan kosong kelapa sawit (TKKS) belum dimanfaatkan sepenuhnya oleh masyarakat. Limbah kayu serta TKKS yang terbuang dari kegiatan eksploitasi sangat banyak, tetapi produktivitas dari hasil hutan semakin menurun setiap tahunnya. Budi daya jamur dapat menjadi salah satu solusi untuk mengurangi kuantitas limbah kayu maupun TKKS. Penelitian ini bertujuan memperoleh komposisi terbaik antara TKKS dan serbuk gergaji kayu sengon untuk menumbuhkan jamur tiram putih (Pleurotus ostreatus), mengevaluasi pengaruh tambahan aktivator pada pertumbuhan jamur, dan efisiensi biologi dari jamur. Hasil penelitian menunjukkan bahwa perlakuan 100% TKKS dan tambahan aktivator 0% memberikan hasil terbaik dalam produktivitas jamur. Tambahan aktivator berpengaruh nyata pada pertumbuhan miselium, dan jenis media berpengaruh sangat nyata pada fase generatif jamur., MUHAMMAD REINALDO ASRAF MAHENDRA. Cultivation of White Oyster Mushrooms Using Empty Palm Oil Bunches and Sengon Sawdust and Adding Activators. Supervised by ELIS NINA HERLIYANA and SUMINAR SETIATI ACHMADI. Wood waste and oil palm empty fruit bunches (OPEFB) have yet to be fully utilized by the community. Wood waste and OPEFB wasted from exploitation activities are enormous, but the productivity of forest products is decreasing every year. Mushroom cultivation can be one of the solutions to reduce the quantity of wood waste and OPEFB. This study aims to obtain the best composition between OPEFB and sengon sawdust to grow white oyster mushrooms (Pleurotus ostreatus), to evaluate the effect of additional activators on mushroom growth, and the biological efficiency of mushrooms. The results showed that the treatment of 100% OPEFB and 0% additional activator gave the best results in mushroom productivity. Furthermore, the additional activator had a significant effect on mycelium growth, and the type of media significantly affected the mushroom's generative phase.
Keyword: Aktivator, TKKS, Pleurotus ostreatus, Jamur, Activator, Mushrooms, OPEFB, Wood Waste

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: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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