Impact of dicyandiamide application on nitrous oxide emissions from urine patches in northern Victoria, Australia

摘要: Animal production systems in Australia are a significant contributor to nitrous oxide (N2O) emissions from soil, with the Australian Greenhouse Gas Inventory attributing ~25% of N2O agricultural soils animal production. Recent studies New Zealand using dicyandiamide (DCD) association application urine pastoral soil have reported reductions emission up 78% and reduced nitrate leaching 45%. As such, DCD grazed pastures offers potential reduce resulting directly This study was conducted on border-check irrigated perennial pasture used for dairy northern Victoria. Automated enclosure chambers were linked fourier transformed infrared spectrometer determine emissions. The three treatments control, cow (1000 kg N/ha) included (10 kg/ha). applied mid-spring (15 September 2005) again mid-summer (25 January 2006) new area measured 120 70 days, respectively. Soil temperature water content monitored continuously. inorganic-N (0–100 mm) every 7 14 days days. Application patch by 47% when 27% mid-summer. impact single patches lasted ~50 25 These lower than those likely be related conditions, principally temperature. surface has Victoria; however, effects short-lived given temperatures high clay typical many soils. More research is required examine reduction options that cost effective systems.