植物营养与肥料学报Issue(6)：1411-1419,9.DOI:10.11674/zwyf.2013.0615
脲酶抑制剂与硝化抑制剂对稻田氨挥发的影响
Effects of urease and nitrification inhibitors on ammonia volatilization from paddy fields
摘要
Abstract
With the technique of stable isotope 15 N-traced urea, a field experiment was conducted to determine the effects of urease inhibitor(UI) and nitrification inhibitor(NI) on losses of ammonia(NH3) volatilization from paddy fields .The urease inhibitor NBPT [ N-( n-butyl ) thiophosphoric triamide ] and nitrification inhibitor DMPP [3, 4-Dimethyl-1H -pyrazole phosphate ] were added to urea ( U) with a rate of 10, 000 mg/kg urea.A randomized experimental design with five treatments and three replicates was used :1 ) CK ( no N fertilizer );2 ) Urea only;3) Urea +NBPT;4) Urea +DMPP;5) Urea +NBPT +DMPP.The fertilizer was broadcast in rice field before the transplanting of rice seedlings .The results show that the losses of NH 3 volatilization from the nitrogen fertilizers last for 21 days and the maximum volatilization turns up in the 4th day after fertilization. Compared to the urea treatment , the peak of volatilization and cumulative loss of NH 3 from addition of NBPT significantly decreased by 27.04%and 21.65%, and that from combined addition of NBPT and DMPP decreased by 12.95% and 13.58%, respectively . On the contrast , adding DMPP alone enhanced the peak of NH 3 volatilization by 23.61%, the NH3 losse did not increase significantly .NH3 volatilization rate is significantly correlated with the concentration of NH 4+-N and pH of floodwater ( P<0.01 ) , not significantly correlated with the temperatures of air, soil and floodwater.Therefore, the NH4+-N concentration and pH of floodwater are the dominating factors influncing NH 3 volatilization rate .Compared to the normal urea , the two treatments added with NBPT increase yield of rice significantly , and combination of NBPT and DMPP markedly improves the recovery of applied N in the above-ground parts .In summary , the effects of urea added with urease inhibitor or combination of urease and nitrification inhibitors are better than urea added with nitrification inhibitor alone , in view of reduction of NH3 volatilization , increase of rice yield and the recovery of applied N in the above-ground parts .关键词
脲酶抑制剂/硝化抑制剂/氨挥发/氮素回收率/稻田Key words
urease inhibitor/nitrification inhibitor/ammonia volatilization/N recovery/paddy field分类
农业科技引用本文复制引用
张文学,孙刚,何萍,梁国庆,王秀斌,刘光荣,周卫..脲酶抑制剂与硝化抑制剂对稻田氨挥发的影响[J].植物营养与肥料学报,2013,(6):1411-1419,9.基金项目
现代农业产业技术体系建设专项资金（CARS-01-31）；公益性行业（农业）科研专项（201003016）；国家重点基础研究发展计划课题（2013CB127405）；中国农业科学院基本科研业务费预算增量项目资助。 （）
