Judul: Efisiensi penggunaan air tanaman padi dengan irigasi kontinyu dan berselang di Kecamatan Mijen, Semarang
Abstrak: Climate anomalies and climate change are obstacles in achieving a sustainable rice production. The use of appropriate and locally accepted technology and affective water use are needed at farmers level. This study was conducted to analyze water use efficiency of several varieties of rice namely Inpari 1, Umbul, Situ Bagendit, and Galur Harapan at two different spacing system (Jajar legowo and Tegel) with continuous and intermittent irrigation system. Water use efficiency (WUE) of plants were calculated by dividing dry biomass production with water used (ETc) during grow period. Water use was using reference evapotranspiration (ET0) corrected by plant coefficient (Kc). ET0 was calculated using FAO Penman-Monteith method. The result showed that WUE of plants grown with intermittent irrigation was higher than plants grown with continuous irrigation, both by production and total (9.93% and 10% respectively). Water use efficiency can be done with increased potensial crop yields or to reduce water of irrigation without reducing yields.
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Judul: Efisiensi air irigasi tanaman padi (Oryza sativa.) dengan metode SRI (System of Rice Intensification)
Abstrak: Pertambahan jumlah penduduk yang terus meningkat menimbulkan Kekhawatiran terhadap terjadinya musibah rawan pangaa Oleb karena itu laju pertumbuhan yang pesat ini harus diimbangi dengan laju ketersediaan pangan yang memadai. Untuk memenuhi ketersediaan pangan yang memadai maka harus ada peningkatan hasil produksi pertanian terutama padi. Beras sebagai makanan pokok sebagian besar rakyat Indonesia jumlahnya harus mencukupi guna mengatasi terjadinya rawan pangan. Sementara di lain pihak peningkatan produktifitas tanaman padi sangat ditentukan oleh ketersediaan air yang semakm hari semakin berkurang. Ini menjadi dilema yang cukup sulit untuk diselesaikan. Sektor pertanian merupakan pengguna air terbesar, yaitu sekitar 80 % dari total air yang dimanfaatkan oleh manusia. Dengan demikian pemanfaatan air secara bijaksana menjadi pilihan yang harus diambil.
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Judul: Studi Histopatologi Organ Hati Hamster (Mesocricetus auratus) yang Diinfeksi Coxiella burnetii
Abstrak: Coxiella burnetii (C. burnetii) is a bacterial like organism that causes Query fever. The aim of this study was to describe the liver histopathology of hamsters after infected by C. burnetii intraperitoneally. Hamster were divided into two groups. All hamster liver were collected for histopathological examination using hematoxylin-eosin staining (HE) and immunohistochemical staining (IHC). HE staining results in hamsters group I which were injected with C. burnetii’s antigen showed 3 out of 4 has granuloma which are typical of C. burnetii infection. All hamsters group II which were injected with hamsters group I’s spleen extracts showed granuloma in microscopic observation. IHC staining revealed all hamsters liver has positive result. Beside granuloma lesion, all hamster’s liver show acute hepatitis symptoms. The microscopic lesion of acute hepatitis showed the inflammatory cell accumulated in liver perifer, degeneration of hepatocytes cells, activation of lymphoid follicles, as well as congestion in small and large blood vessels.
Keyword: C. burnetii, granuloma, hamster, HE, histopathology, IHC