logging in or signing up LECTURE24 Sharck Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINTLite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 99 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: January 07, 2008 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... By: rajashekarareddy (29 month(s) ago) very good Saving..... Post Reply Close Saving..... Edit Comment Close Premium member Presentation Transcript Gas-gas dari aktivii pertanian: Gas-gas dari aktivii pertanian International Panel on Climate Change (IPCC) telah menyarankan supaya kepekatan gas-gas diturunkan sebanyak 5.6% pada tahun 2010 untuk menstabilkan ditahap sekarang. Pengurusan pertanian membekal ~ 30% jumlah methana yang dikeluarkan ke udara – terutama sekali dari sawah padi Tetapi keperluan beras perlu dipertingkatkan untuk menampung keperluan makanan terutama sekali di AsiaSlide2: Untuk meningkat pengeluaran beras, tanah perlu diuruskan dengan baik - dengan baja organik dan tak organik Baja organik dalam keadaan terendam (redox) CH4 (Eh ~ -150-160 Ev) Variety, pembajaan, pengurusan air mempengaruhi pengeluran methana ke udaraMethane Sources (Tg/yr): Methane Sources (Tg/yr)Slide4: Effect of Global Warming Scenario by the year 2070 About 3.3 million people may displace through flooding. 800,000 hectares of irrigated rice fields will be inundated 300,000 hectares of coastal fishponds would be lost 25% mangrove forest will be affected Lead to a lost of US$ 113 billion of socio-economic activities. (Gupta, J. 1997)Slide5: Methane (CH4) * 1% increase yr-1 * Current concentration 1730 mg/kg * 30% sources derive from paddy fields * Chemically active in the atmosphere * Influence atmospheric concentration : hydroxyl radicals, ozone, & carbon monoxide. (Cicerone and Oremland, 1988)Slide6: Comparison of annual CH4 emissions (Tg yr-1) from China, India, Indonesia, Philippines, and Thailand predicted in recent years.Slide7: CH4 gas collection Using an automatic gas sampling device Compressed air Gas intake Electric fan Plexiglass chamberSlide11: The CH4 emission pattern of four different rice cultivars during WS of 2001/02Slide12: 0 DAT 85 70 15 0 DAT 85 20 30 70 35 0 DAT 85 70 0 DAT 85 70 Treat 1. 5 cm Treat 2. 0 – 1 cm Treat 3. Intermittent irrigation Treat 4. Pulse irrigationSlide13: Water height pattern of treatment 1 (5 cm) Water height pattern of treatment 2 (0-1 cm)Slide14: Water height pattern of intermittent irrigation Water height pattern of pulse irriga-tionSlide15: CH4 emission and redox pattern at 5 cm continuous floodingSlide16: CH4 emission and redox pattern of 0-1 cm continuous flooding Redox potential (mV)Slide17: Redox potential (mV) drain prior to harvest CH4 emission and redox pattern of intermittent irrigationSlide18: CH4 emission and redox pattern of pulse irrigationSlide19: CH4 emission (kg ha-1) and yield of different water management practices during DS 2002 Numbers in the same column and followed by a common letter are not significantly different at P = 0.05 by DNMRT. You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
LECTURE24 Sharck Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINTLite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 99 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: January 07, 2008 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... By: rajashekarareddy (29 month(s) ago) very good Saving..... Post Reply Close Saving..... Edit Comment Close Premium member Presentation Transcript Gas-gas dari aktivii pertanian: Gas-gas dari aktivii pertanian International Panel on Climate Change (IPCC) telah menyarankan supaya kepekatan gas-gas diturunkan sebanyak 5.6% pada tahun 2010 untuk menstabilkan ditahap sekarang. Pengurusan pertanian membekal ~ 30% jumlah methana yang dikeluarkan ke udara – terutama sekali dari sawah padi Tetapi keperluan beras perlu dipertingkatkan untuk menampung keperluan makanan terutama sekali di AsiaSlide2: Untuk meningkat pengeluaran beras, tanah perlu diuruskan dengan baik - dengan baja organik dan tak organik Baja organik dalam keadaan terendam (redox) CH4 (Eh ~ -150-160 Ev) Variety, pembajaan, pengurusan air mempengaruhi pengeluran methana ke udaraMethane Sources (Tg/yr): Methane Sources (Tg/yr)Slide4: Effect of Global Warming Scenario by the year 2070 About 3.3 million people may displace through flooding. 800,000 hectares of irrigated rice fields will be inundated 300,000 hectares of coastal fishponds would be lost 25% mangrove forest will be affected Lead to a lost of US$ 113 billion of socio-economic activities. (Gupta, J. 1997)Slide5: Methane (CH4) * 1% increase yr-1 * Current concentration 1730 mg/kg * 30% sources derive from paddy fields * Chemically active in the atmosphere * Influence atmospheric concentration : hydroxyl radicals, ozone, & carbon monoxide. (Cicerone and Oremland, 1988)Slide6: Comparison of annual CH4 emissions (Tg yr-1) from China, India, Indonesia, Philippines, and Thailand predicted in recent years.Slide7: CH4 gas collection Using an automatic gas sampling device Compressed air Gas intake Electric fan Plexiglass chamberSlide11: The CH4 emission pattern of four different rice cultivars during WS of 2001/02Slide12: 0 DAT 85 70 15 0 DAT 85 20 30 70 35 0 DAT 85 70 0 DAT 85 70 Treat 1. 5 cm Treat 2. 0 – 1 cm Treat 3. Intermittent irrigation Treat 4. Pulse irrigationSlide13: Water height pattern of treatment 1 (5 cm) Water height pattern of treatment 2 (0-1 cm)Slide14: Water height pattern of intermittent irrigation Water height pattern of pulse irriga-tionSlide15: CH4 emission and redox pattern at 5 cm continuous floodingSlide16: CH4 emission and redox pattern of 0-1 cm continuous flooding Redox potential (mV)Slide17: Redox potential (mV) drain prior to harvest CH4 emission and redox pattern of intermittent irrigationSlide18: CH4 emission and redox pattern of pulse irrigationSlide19: CH4 emission (kg ha-1) and yield of different water management practices during DS 2002 Numbers in the same column and followed by a common letter are not significantly different at P = 0.05 by DNMRT.