Judul: Hantaran hidrolik jenuh dan kaitannya dengan beberapa sifat fisika tanah pada tegalan dan hutan bambu
Abstrak: Hydroulic Conductivity is very important in maintaining the quality of soil and environment. Damage of hydroulic conductivity may increases run off and decreases water storage so results in flood, erosion, landslide, and drought. Hydroulic conductivity own related with soil physical characteristics and influence of land use. This study aims to know of hydroulic conductivity and interellated with soil physical characteristics in dry fields and bamboo forests. Influence of land use and location revealed with randomized block design method. This study revealed that bamboo forests own better soil physical characteristics compared to dry fields. Bamboo forests own hydroulic conductivity about 3.00 cm/hour, aggregat stability indeks about 230.15 %, porosity about 51.68 %, drainage pore spaces about 16.80 %, water content about 29.75 % and organic matter about 5.15 % greater than dry fields that own about 0.90 cm/hour, agregat stability indeks about 166.17 %, porosity about 44.08%, drainage pore spaces about 11.89 %, water content about 6.94 % and organic matter about 3.69 %. Bamboo forests and dry fields own bulk density about 1.39 g/cm3 and 1.57 g/cm3. Based on this study, hydroulic conductivity and soil phsyical characteristics in bamboo forests is better than dry fields.
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Judul: The Relationship between Soil Hydraulic Conductivity and Soil Physical Properties as a Consequence of Soil Conservation Tillage and Its Relationship to Surface Runoff and Erosion
Abstrak: Aliran permukaan dan erosi merupakan penyebab penurunan kualitas sifat fisik tanah di daerah tropika basah seperti di Indonesia. Untuk mengurangi besarnya aliran permukaan dapat dilakukan dengan peningkatan kemampuan peresapan tanah (hantaran hidrolik). Berbagai teknik konservasi tanah dan air dapat meningkatkan hantaran hidrolik tanah melalui perbaikan sifat-sifat fisik tanah, yang selanjutnya diharpkan dapat mengurangi aliran permukaan dan erosi. Oleh karena itu perlu dilakukan penelitian tentang pengaruh teknik konservasi tanah dan air terhadap hantaran hidrolik tanah. Serangkaian penelitian dilakukan di lapangan untuk mengamati hantaran hidrolik dan sifat-sifat fisik yang mempengaruhinya serta pengaruhnya terhadap aliran permukaan dan erosi. Penelitian dilakukan di Kebun Pendidikan Cikabayan, IPB Dramaga, dengan perlakuan Kontrol (P1), Slot Till (P2), Slot Till + teras gulud + saluran (P3), Slot Till + teras gulud + saluran + mulsa organik (P4), dan Slot Till + teras gulud + saluran + mulsa organik + LRB (P5) yang disusun dalam rancangan acak lengkap (RAL). ). Hasil penelitian menunjukkan bahwa hantaran hidrolik pada perlakuan Slot Till + teras gulud + saluran + mulsa organik (P4) paling besar (3.05 cm/jam), diikuti oleh hantaran hidrolik pada perlakuan Slot Till + teras gulud + saluran + mulsa organik + LRB (P5; 2.68 cm/jam), P3 (2.32 cm/jam), P2 (1.71 cm/jam), dan P1 (0.85 cm/jam). Hantaran hidrolik tanah dipengaruhi oleh bobot isi, stabilitas agregat, dan ruang pori drainase. Peningkatan hantaran hidrolik tanah akibat teknik konservasi tanah dan air di atas dapat menurunkan aliran permukaan dan erosi., Surface runoff and erosion are causes of a decrease in the quality of soil physical properties in wet tropical areas such as Indonesia. To reduce the amount of surface runoff, it can be done by increasing the soil's hydraulic conductivity. Various soil and water conservation techniques can increase the hydraulic conductivity of the soil by improving the physical properties of the soil, which in turn is expected to reduce surface runoff and erosion. Therefore, it is necessary to conduct research on the effect of soil and water conservation techniques on soil hydraulic conductivity. A series of studies were carried out to observe hydraulic conductivity and the physical properties that influence it as well as their effect on surface runoff and erosion. The research was conducted at the Cikabayan Field Stasion, IPB Dramaga, with Control (P1), Slot Till (P2), Slot Till + bund terrace + channel (P3), Slot Till + bund terrace + channel + organic mulch (P4), and Slot treatments. Slot Till + bund terrace + channel + organic mulch + LRB (P5) arranged in a completely randomized design (RAL). The results showed that the hydraulic conductivity in the Slot Till + bund terrace + channel + organic mulch (P4) treatment was the greatest (3.05 cm/hour), followed by the hydraulic conductivity in the Slot Till + bund terrace + channel + organic mulch + LRB (P5; 2.68 cm/hour), P3 (2.32 cm/hour), P2 (1.71 cm/hour), and P1 (0.85 cm/hour). Soil hydraulic conductivity is influenced soil bulk density, soil aggregate stability, and drainage pore space. The increased of soil hydraulic conductivity due to soil and water conservation techniques can reduce surface runoff and erosion
Keyword: Erosion, Runoff, Soil and Water Conservation, Soil hydraulic conductivity, Soil physical properties

Judul: Pengklonan gen VP28 Penyandi Viral Protein-28 dari virus white spot syndrome sebagai langkah awal produksi vaksin rekombinan udang penaeid
Abstrak: Usaha produksi udang dalam negeri saat ini sedang mengalami kendala akibat serangan penyakit white spot syndrome virus (WSSV) pada jenis udang windu (Penaeus monodon). WSSV yang termasuk virus DNA berukuran besar dapat menginfeksi udang dan berbagai jenis crustaceae lainnya. Virus ini merupakan patogen yang sangat ganas dan paling serius menyerang udang. Serangannya begitu cepat, sangat sulit dihentikan dan dapat mematikan 100% udang peliharaan dalam waktu 3-10 hari setelah munculnya gejala klinis. Serangan virus ini juga telah menghancurkan industri udang di berbagai negara. Infeksi WSSV ditandai dengan adanya bintik putih atau bercak putih pada eksoskeleton dan epidermis terutama pada bagian karapas udang. Hingga saat ini belum ada cara tradisionalyang efektif mencegah dan menanggulangi penyakit ini.
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