Non-CO2 greenhouse gas emissions associated with winter management and farm effluent application in grazed grassland systems in New Zealand

摘要

@@Introduction In New Zealand,.stand-off pads.(purpose built,drained loafing space to hold livestock for periods when it is not suitable to have them on pasture) are increasingly used in restricted cattle grazing systems.These stand-off pads are considered to avoid damage to pasture,to minimise soil compaction and to reduce emissions of greenhouse gas nitrous oxide ( N2O) and nitrate leaching during wet periods of the year.However,emissions of N2O and methane (CH4) also occur from stand-off pads and from land applied farm effluent collected from stand-off pads.Reducing the emissions from these sources is crucial to the development of successful restricted grazing strategies to reducing their environmental impact.Here we summarise the results of N2O and CH4 emissions measured from a stand-off pad and also N2O emissions from effluent applied to two pastoral soils under contrasting soil moisture conditions.