摘要
采用模拟淋溶试验,研究了表面活性剂十二烷基苯磺酸钠(SDBS)对紫色土氮素的垂向迁移的影响.SDBS减少紫色土铵态氮的淋溶损失,且SDBS浓度越高,铵态氮损失越少.SDBS促进紫色土硝态氮的淋失,累积淋失量依次为SDBS100>SDBS40>SDBS0>SDBS5.低浓度SDBS抑制紫色土总凯氏氮(TKN)损失,但高浓度SDBS则显示促进作用,SDBS40、SDBS100的TKN累积淋失量分别较SDBS0增加了16.8%、22.36%.SDBS淋溶影响紫色土氮素的垂向分布,紫色土氮素有明显向下迁移的趋势,且SDBS浓度越高,迁移性越强.
The simulated leaching experiment was conducted to determine the effects of surfactant of sodium dodecyl benzene sulphonate （SDBS） on vertical transporting of nitrogen in purple soil.SDBS could reduce NH 4＋-N loss from soil,and the higher concentration of SDBS,the less loss.SDBS could increase NO 3--N loss from soil,and the order of accumulation loss is SDBS100SDBS40SDBS0SDBS5.Lower concentration SDBS decrease TKN loss,but higher concentration SDBS had a reverse effect,and compared with SDBS0,the accumulation loss TKN of SDBS40,SDBS100 increased by 16.8%,22.36%,respectively.SDBS could affect vertical transporting of nitrogen in purple soil,that is,the significant down-transporting of nitrogen was observed after leaching with SDBS,and the higher concentration of SDBS,the more obviously transporting trend.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2010年第7期1614-1618,共5页
Environmental Science
基金
重庆市教育委员会高校骨干教师项目(2003)
西南大学生态学重点学科"211工程"基金项目
关键词
表面活性剂
铵态氮
硝态氮
紫色土
迁移
surfactant
ammonium nitrogen
nitrate nitrogen
purple soil
transport
