NBPT/DMPP对白浆土中尿素态氮转化调控效果研究  

Effects of NBPT and DMPP on Regulating and Controlling Urea N Transformation in Albic Soil

作　　者：聂彦霞[1,2] 李东坡[1] 李莉[1,2] 武志杰[1] 薛妍[1,2] 李会彬[1,2] 

机构地区：[1]中国科学院沈阳应用生态研究所,沈阳110016 [2]中国科学院研究生院,北京100049

出　　处：《土壤》2012年第6期947-952,共6页Soils

基　　金："十二五"国家科技支撑计划项目(2011BAD11B04);"十一五"国家科技支撑计划项目(2009BADB3B07);中国科学院知识创新工程重要方向项目(KSCX2-YW-N-078)资助

摘　　要：采用室内恒温、恒湿培养方法,研究不同剂量NBPT、DMPP及其组合对尿素态氮在三江平原白浆土中的转化作用效果。研究表明,NBPT在白浆土上的作用时间不到14天。NBPT可以有效减少尿素的水解,2.5%NBPT效果好于0.5%NBPT。DMPP有效抑制白浆土中NH4+-N向NO3--N的转化,其有效调控时间长达45天以上,1%DMPP与5%DMPP作用效果相差不大。NBPT和DMPP组合处理作用效果优于仅添加NBPT或者DMPP处理。0.5%NBPT+1%DMPP组合处理可以有效地抑制尿素水解和保持土壤中大量的氮以NH4+-N的形式存在。With the incubation experiment under constant temperature and humidity, the paper studied the effects of different concentrations of urease inhibitor （NBPT）, nitrification inhibitor （DMPP）, and their combinations on urea nitrogen transformation in albic soil in Sanjiang Plain. The results showed that the effective time of NBPT was less than 14 days. NBPT reduced urea hydrolysis and transformation effectively, 2.5%NBPT was better than 0.5%NBPT. DMPP inhibited the transformation of ammonium nitrogen to nitrate nitrogen effectively. It also kept high level of soil NH^＋-N more than 45 days in albic soil, the differences between 1%DMPP and 5%DMPP were not obvious. The combination of NBPT and DMPP was better than the treatment of only NBPT or DMPP. The treatment of 0.5%NBPT ＋ 1%DMPP was more effective in controlling urea hydrolysis, retaining high level of soil NH4^＋-N.

关 键 词：NBPT DMPP 尿素态氮 铵态氮 硝态氮 

分 类 号：S143.16[农业科学—肥料学]