The objective of this research is to reveal the influence of the type of gadung to the produced ethanol content, the yeast concentration which is suitable to get the maximum ethanol and to know the interaction between the type of gadung and the yeast concentration on the ethanol content produced. The research using Randomized Complete Design with factorial pattern consisted of 2 factors: the gadung bulb type (U), as the first factor consisting of white gadung tuber (U1) and yellow bulb tuber (U2) second factor yeast concentration consisting of 2 , 5% (R1), 3% (R2), 3.5% (R3). Fermentation duration is done for 3 days. Each treatment is repeated 3 times. The results showed that the proximate analysis on two types of gadung is highest in white gadung. The average width of the highest gadung leaves on white gadung . Test brix on the highest gadung tubers on white gadung. On observation of the highest yield of ethanol occurs on the type of white gadung and 2.5% yeast concentration. The best type of mass observation occurred in yellow gadung tuber type and 2.5% yeast concentration. Observation of initial pH of ethanol was highest in white gadung and yeast concentration 2.5%. Observation of pH after distillation is highest on white gadung and at yeast concentration 2.5%. The highest concentration of ethanol content on yellow gadung and at yeast consentation 2.5%. The observation of the highest ash content on yellow gadung and at yeast concentration 3.5%.
The purpose of this research is observe the effect of rice husk addition on various growing media on its growth and yield of white oyster mushroom (Pleurotus ostreatus). This research used Complete Random Design (CRD) Factorial consisting of 2 factors with 3 replications. The first factor is the various media planting (M). Media of sawdust sengon (M1); Rice straw; M2 and dried banana leaf (M3). The second factor is the supply of rice husks consisting of. Without the provision of rice husk (P0); Provision of 10% rice husk (P1); Provision of rice husk 20% (P2). The best planting medium was found in the treatment of sawdust wood media sengon (M1). Besides, the addition of rice husk concentration has significant effect on all observation parameters. The best result was found in 20% rice husk. The interaction between treatment of planting media and rice husk giving significant effect on first harvest, the body diameter of fruit of first harvest and body diameter of fruit of second harvest
This study aims to determine the technique of increasing the production of corn (Zea mays, l) varieties of lamuru,bisma, sukma raga with marginal critical land with the use of cow manureby North Aceh District. This research was carried out from June to November 2021, at the West Reuleut Gampong Garden, Muara Batu District, North Aceh Regency. This study used a 3 x 2 randomized block design and replicated 3 times. The first factor is varieties with 3 levels, name-ly: Bisma, Lamuru, and Sukmaraga varieties. The second factor is cow manure with 2 levels, namely 15 tons/ha and 20 tons/ha. Parameters observed were plant height, stem diameter, number of leaves, time of flower emergence, cob length, cob weight, length without cob, weightwithout cob, and weight of 1000 seeds. The results showed that the treatment of severalvarieties showed a very significant effect on almost all of the observed variables. The use of bisma varieties showed the best growth. The use of cow manure 15 tons/ha also gives the bestgrowth on almost all variables.
Hama pascapanen <em>Sitophilus oryzae</em> (Coleoptera: Curculionidae) dan <em>Rhyzopertha dominica</em> (Coleoptera: Bostrichidae) merupakan hama utama yang menyebabkan kerusakan secara kuantitas dan kualitas sorgum selama penyimpanan. Interaksi antar individu <em>S. oryzae</em> dan <em>R. dominica </em>dapat terjadi pada spesies yang sama maupun spesies yang berbeda di penyimpanan sorgum. Tujuan penelitian mempelajari interaksi antara <em>S. oryzae</em> dan <em>R. dominica </em>terhadap<em> </em>pertumbuhan populalsi keduanya dan dan kerusakan sorgum. Penelitian menggunakan Rancangan Acak Lengkap dengan perlakuan intraspesifik dan interspesifik <em>S. oryzae</em> dan <em>R. dominica</em>. Jenis perlakuan terdiri dari tiga taraf yaitu 30 pasang imago <em>S. oryzae</em>, 30 pasang imago <em>R. dominica</em>, dan 15 pasang imago <em>S. oryzae</em> + 15 pasang imago <em>R. dominica</em>. Imag-imago tersebut diinfestasikan ke dalam stoples plastik yang berisikan 150 g sorgum dan disimpan selama 60 hari. Parameter pengamatan meliputi jumlah imago, persentase berat bubuk dan susut berat sorgum. Hasil penelitian menunjukkan bahwa interaksi antara <em>S. oryzae </em>dan <em>R. dominica </em>mempengaruhi pertumbuhhan populasi keduanya dan kerusakan sorgum. Kompetisi interspesifik antara spesies <em>S. oryzae</em> dan <em>R. dominica</em> secara nyata dapat mengurangi populasi kedua tersebut. Kompetisi intraspesifik <em>S. oryzae </em>mampu menyebabkan persentase susut berat dan persentase berat bubuk yang lebih besar dibandingkan kompetisi intraspesifik <em>R. dominica </em>dan kompetisi interspesifik keduanya. Informasi tentang interaksi antar spesies <em>S. oryzae</em><em> </em>dan <em>R. dominica</em> sebagai acuan kegiatan pemantauan untuk mengevaluasi tindakan pengendalian yang dilakukan terhadap hama tersebut di penyimpanan sorgum.
Jamur tiram putih (Pleurotus ostreatus) dan jamur tiram abu-abu (P. pulmonarius) termasuk dalam famili Pleurotacea yang belum dapat mencapai hasil yang optimal. Selain itu sporophora jamur ini mudah rusak (perishable) sehingga menyukarkan proses pemanenan dan selama pengangkutan. Penelitian ini bertujuan untuk meningkatkan kualitas benih jamur tiram melalui teknik fusi antara kultur spora tunggal isolat jamur tiram putih dan jamur tiram abu-abu. Koleksi isolasi spora tunggal yang berasal dari sporophora dewasa dari jamur tiram putih dan jamur tiram kelabu yang ditumbuhkan pada media agar dalam memperoleh kultur monokarion. Untuk memastikan isolasi kultur monokarion pada hifanya tidak terdapat koneksi penjepit (clamp connection). Masing-masing kultur monokaryon yang berasal dari kedua tetua diuji kompatibilitasnya dengan cara meletakkan miselia plug dengan bantuan cob borer berdiameter 0.7 cm yang diletakkan secara berjajar pada bagian tengah cawan petri yang berisi media PDA (potato dextrose agar). Keberhasilan peleburan dua jenis kultur monokaryon yang kompatibel ditunjukkan dengan adanya clamp connection pada zona pertemuan dua misela (junction zone) yang tampak terintegrasi secara merata, sedangkan penyatuan monokaryon kultur yang incompatibel ditandai dengan ketiadaan clamp connection dan tidak akan menghasilkan tubuh buah jamur jika dibudidayakan. Dikaryon baru hasil persilangan disubkulturkan dan dibudidayakan untuk mendapatkan sporophora jamur baru. Miselia jamur hasil persilangan memiliki kecepatan tumbuh memenuhi media baglog lebih tinggi dari miselia kedua tetuanya. Kecepatan tumbuh dan ketebalan miselia merupakan karakteristik yang akan dipilih sebagai tanda dalam seleksi benih unggul jamur tiram.
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