农业环境科学学报2017，Vol.36Issue(10)：2063-2070,8.DOI:10.11654/jaes.2017-0488
硝化抑制剂对典型茶园土壤尿素硝化过程的影响
Effects of nitrification inhibitors on nitrification rate of urea in four typical tea soils
摘要
Abstract
A laboratory incubation study over a 28-day period at 25 ℃ and 60％ water holding capacity in China was conducted to determine the effect of nitrification inhibitors on nitrification rates in four typical tea soils(pH 3.32～3.54).The experiment included five treatments applied on an equivalent N basis:(1) CK,soil+urea (100 mg N· kg-1);(2) 2％ DCD(Dicyandiamide),soil+urea+2％ DCD;(3) 10％ DCD,soil+urea+10％ DCD;(4) 0.27％ Nitrapyrin(2-chloro-6-(trichloromethyl) pyridine),soil+urea+0.27％ Nitrapyrin;(5) 0.54％ Nitrapyrin,soil+urea+0.54％ Nitrapyrin.Both nitrification inhibitors were applied at recommendation rates.The results showed that inhibitory effect of DCD decreased with incubation time in the four tea soils,and the high concentration of DCD showed a stronger inhibitory effect than the low concentration only on the 28th day.After 28 days of incubation,both rates of DCD reduced nitrification by 12.15％～59.68％ in Anxi and Yixing tea soils,while the inhibitory effect disappeared in Hangzhou and Langxi tea soils regardless of DCD concentration.In general,DCD inhibition effects over 28 d incubation ranked as Yixing soil＞Anxi soil＞Hangzhou soil＞Langxi soil.Compared with DCD,Nitrapyrin completely inhibited net nitrification in the four tea soils during the whole experiment period regardless of the concentration of Ni-trapyrin,indicating that Nitrapyrin could effectively inhibit the nitrification of tea soils during the 28 days of incubation.Overall,Nitrapyrin is a more efficient nitrification inhibitor for tea soils.关键词
硝化抑制剂/茶园土壤/净硝化速率/硝化抑制率Key words
nitrification inhibitors/tea soil/net nitrification rate/nitrification inhibition rate分类
资源环境引用本文复制引用
吴晓荣,张蓓蓓,余云飞,黄蓉,颜明娟,倪康,崔静雅,王慎强,程谊..硝化抑制剂对典型茶园土壤尿素硝化过程的影响[J].农业环境科学学报,2017,36(10):2063-2070,8.基金项目
国家重点研发计划项目(2017YFD0800103,2017YFD0200106) （2017YFD0800103,2017YFD0200106）
国家自然科学基金项目(41671231,41571294,41601016) （41671231,41571294,41601016）
江苏省农业科技自主创新资金项目[CX(15) 1004]National Key Research and Development Program of China(2017YFD0800103,2017YFD0200106) （15）
National Natural Science Foundation of China(41671231,41571294,41601016) （41671231,41571294,41601016）
Agricultural Science and Technology Independent Innovation Fund Project of Jiangsu Province [CX(15)1004] （15）
