Judul: Respon tanaman kedelai dan padi gogo terhadap limbah budi daya jamur tiram
Abstrak: The amount of mushroom cultivation waste increased in consequence of the increase of quality and capacity of business working on mushroom production. The accumulation of cultivation waste will cause environmental problem, if it is not handled properly. This research was aimed to evaluate the effect of oyster mushroom cultivation waste on nutrient uptake, plant growth, and yield of soybean and upland rice. The experiment was conducted using two factors of treatment. The first factor was waste of oyster mushroom cultivation that consist of 4 levels : 0 g/kg, 150 g/kg, 300 g/kg, and 450 g/kg of soil. The second factor was anorganik fertilizers consisting 3 level : 0%, 50%, and 100% of recommended doses. The upland rice variety Situbagendit was planted in pots and grown in the green house, while soybean number 44 was planted in pots and grown on the field condition. The treatmens of waste increase significantly the nutrients uptake, growth and yield of soybean and upland rice. The treatment of 300 g waste/kg soil in combination with 100% dose of anorganik fertilizers showed the best result in nutrient uptake. Anorganik fertilizers increase nutrient uptake in soybean, but contrarily in upland rice. The dose 300 g waste/kg of soil showed the best result in plant height, stem diameter, and number of node. While the dose of 450 g/kg showed the best result in number of leave, number of branch, and shoot dry weight of soybean. The mushroom cultivation waste also increase significantly the number of leave and rice seedlings. Combined with the mushroom cultivation waste, anorganik fertilizers had no significant affect on growth and yield of soybean and upland rice. The mushroom cultivation waste affect significantly the soybean yield that was indicated by the increase of pod number (up to 192%), number of seed (362%), seed weight (462%), and weight of 100 seeds (49%).
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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: Cycle Hamilton pada Graf Lengkap, Graf Regular, dan Graf 2-Connected 4-Regular Berorder Kurang dari Sepuluh
Abstrak: Suatu graf disebut graf Hamilton apabila graf tersebut memuat cycle Hamilton, yaitu cycle yang melewati setiap vertex tepat satu kali. Menentukan keberadaan cycle Hamilton pada suatu graf dapat menggunakan syarat cukup yang berupa teorema-teorema yang telah diperkenalkan sejak tahun 1950-an. Beberapa syarat cukup yang dibahas dalam karya ilmiah ini adalah syarat cukup yang berhubungan dengan graf lengkap dan graf regular. Suatu graf lengkap berorder 𝑛������ ≥ 3 dan graf r-regular berorder 𝑛������ ≤ 2𝑟������ + 1 merupakan graf Hamilton, Karena kedua graf tersebut memuat cycle Hamilton. Selanjutnya, syarat cukup tersebut digunakan untuk menentukan keberadaan cycle Hamilton pada graf 2-connected 4- regular berorder kurang dari 10.
Keyword: graf Hamilton, graf regular, graf lengkap, graf 2-connected 4-regular