在荷兰进行了四个田间试验,使用小风洞去直接测定牧草地表面施用不同类型粪肥的挥发性氨。在施用后6天内,损失的氨态氮常常超过施用铵态氮的40％。施用禽粪浆氨态氮损失的百分率为最高(达83％),风干的禽粪便损失的百分率最小(达21％)。施用猪粪浆所损失的氨态氮(36—78％)通常要比牛粪浆(41％)的大。大多数情况下,在施用后48小时之内,总氨态氮损失达80％或更多些。 Four field trials were conducted in the Netherlands using small wind tunnels to directly measure the volatile ammonia applied to different types of manure on pasture surfaces. The ammonia nitrogen lost is often more than 40% of ammonium nitrogen applied within 6 days after application. Ammonia nitrogen losses were highest for poultry manure (up to 83%) and for air-dried poultry manure (21%). Ammonia nitrogen (36-78%) lost from application of pig slurry is usually larger than cow slurry (41%). In most cases, total ammonia losses are up to 80% or more within 48 hours of administration.