Judul: Pengaruh Ketebalan Mulsa Jerami dan Frekuensi Irigasi terhadap Pertumbuhan dan Produksi Tanaman Kacang Hijau (Vigna radiata L.)
Abstrak: Water availability is a limiting factor of the plant growth. Mulching may help to improve water use efficiency. The objective of the research was to determine the thickness of straw mulch and irrigation frequency that giving optimum growth and yield of green beans. The experiment was arranged in a randomized completed block design with factorial pattern, consisting of two factors with three replications. The first factor was straw mulch thickness, consisted of five levels: M1 (without mulch), M2 (mulch thickness 3 cm), M3 (mulch thickness 6 cm), M4 (mulch thickness 9 cm) and M5 (mulch thickness 12 cm). The second factor was irrigation frequency, consisted of four levels: I1 (2 days interval), I2 (4 days interval), I3 (6 days interval), and I4 (8 days interval). The results show that the thickness of straw mulches and frequency of irrigation showed the different effect on plant height, branches and pods, seed wet weight and dry weight, evapotranspiration value, and water use efficiency of green beans. Straw mulching with thickness 9 cm and frequency irrigation 6 days interval gave the best yield than the other treatments.
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Judul: Pengaruh Pemberian Mulsa Jerami Jagung dan Kepadatan Tanah terhadap Pertumbuhan dan Produksi Jagung (Zea mays)
Abstrak: Intensive land cultivation can damage soil structure and further enable soil to be compact, and reduce water availability in the soil. Mulch application to cover the soil surface will reduce evaporation rate and increase availability of water in the soil. The research was aimed to study the effect of corn straw mulching and soil density application on physical characteristics of the soil, to determining soil bulk density and dose of mulch which is most suitable for corn growth and production of corn. The experiment was designed using a completely randomized factorial design. The first factor is the density of soil which is consist of soil bulk density 0.8, 1.0, dan 1.2 g/cm3 (K1, K2, dan K3). The second factor was corn straw mulch application which was divided into three doses i.e. 0%, 30%, 60%, and 90% (M0, M1, M2, and M3). Data were analyzed using analysis of variance (ANOVA) and further testing using Tukey Test at the level of 5%. The results of the research show the interaction of soil compaction with mulch were significantly affect on plant height at age 11-14 weeks after growing, the number of leaves at the age of 10, 11, 12, and 14 weeks after growing, dry weight of corncob both with and without husk, and dry weight of seed.The increasing of soil compaction were significantly affect on field capacity, soil resistance before planting, both total and reproductive phase evapotranspiration in single growing season, weight of roots, plant biomass, plant growth and production, also soil physics characteristic after harvest. Mulch application significantly affect on evapotranspiration of vegetative phase, plant height at 8-14 weeks after growing, stem diameter at 10 weeks after growing, and production except dry weight of seed. Soil bulk density and mulch cover suitable for the growth and production of corn is 0.8 g/cm3 and 90%.
Keyword: soil compaction, mulch, field capacity, corn growth and production

Judul: Deteksi Dan Karakterisasi Parsial Coronavirus Dari Kelelawar Asal Provinsi Gorontalo Dan Sulawesi Utara
Abstrak: Kelelawar dikenal sebagai reservoar alami untuk virus-virus yang baru muncul, seperti Lyssaviruses, Coronavirus, Ebola virus, virus Nipah, dan banyak lainnya. Karena kelimpahan populasi, distribusi yang luas dan mobilitasnya, kelelawar memiliki risiko lebih besar sebagai sumber penularan zoonosis dibandingkan dengan hewan lain. Peran kelelawar sebagai reservoar bagi banyak pathogen semakin mendapat perhatian, setelah ditemukannya kasus epidemik Severe Acute Respiratory Coronavirus (SARS-CoV) pada tahun 2003 dan Middle East Respiratory Syndrome Coronavirus (MERS-CoV) 2012, sehingga masyarakat ilmiah mulai memberikan perhatian khusus terhadap coronavirus pada kelelawar. Virus yang mirip dengan virus penyebab SARS juga ditemukan pada kelelawar dengan tingkat prevalensi lebih tinggi. Penelitian ini dilakukan sebagai bagian dari proyek besar PREDICT Indonesia, khususnya untuk memeriksa coronavirus pada kelelawar dari Provinsi Gorontalo dan Sulawesi Utara, Indonesia. Dari 151 sampel feses atau sampel usap rektum kelelawar besar pemakan buah (Pteropus alecto) yang dianalisis di laboratorium menggunakan teknik nested Polymerase Chain Reaction (PCR) untuk mengamplifikasi target dari gen RNA-dependent RNA polymerase (RdRp) dengan ukuran produk 434 pasang basa, ditemukan 65 sampel diduga positif (presumptive positive). Enam belas dari 65 sampel presumptive positive, diperiksa lebih lanjut dengan teknik sekuensing untuk dikonfirmasi sebagai Coronavirus. Pohon filogenetik terhadap 16 sampel yang dikonfirmasi positif coronavirus kemudian dianalisis dengan MEGA-6.0 dan hasilnya menunjukkan bahwa sekuen gen RdRp secara parsial memiliki tingkat kemiripan yang tinggi dengan coronavirus pada kelelawar yang dilaporkan sebelumnya di Indonesia dan Thailand.
Keyword: Coronavirus, Indonesia, Konsensus PCR, Pteropus alecto