| 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. |
| 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 |
| 投稿时间：2017-04-03 |
| DOI：10.11654/jaes.2017-0488 |
| 中文关键词: 硝化抑制剂 茶园土壤 净硝化速率 硝化抑制率 |
| 英文关键词: nitrification inhibitors tea soil net nitrification rate nitrification inhibition rate |
| 基金项目:国家重点研发计划项目（2017YFD0800103，2017YFD0200106）；国家自然科学基金项目（41671231，41571294，41601016）；江苏省农业科技自主创新资金项目[CX（15）1004] |
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| 中文摘要: |
| 通过室内好氧培养试验，研究了双氰胺（DCD）和2-氯-6-三氯甲基吡啶（Nitrapyrin）2种常用硝化抑制剂对我国4种典型茶园土壤硝化过程的影响。试验设置5个处理：（1）尿素（CK）；（2）尿素+2% DCD（DCD占施氮量的2%，下同）；（3）尿素+10% DCD；（4）尿素+0.27% Nitrapyrin；（5）尿素+0.54% Nitrapyrin。结果表明：对于4种供试茶园土壤，DCD在培养过程中对硝化过程的抑制效果随培养时间的延长呈下降趋势，且高浓度DCD仅在培养第28 d时才表现出比低浓度DCD更强的抑制效果。培养第28 d后，在安溪和宜兴茶园土壤中DCD的抑制率仍可达12.15%~59.68%，而对于杭州和郎溪茶园土壤，无论DCD浓度高低，培养第28 d后抑制效果消失；对于所研究的4种茶园土壤，DCD处理在培养期间的抑制效果表现为宜兴土壤 > 安溪土壤 > 杭州土壤 > 郎溪土壤。与DCD相比，无论Nitrapyrin浓度高低，其在培养期间对4种茶园土壤的硝化抑制率接近甚至超过100%，表明Nitrapyrin能完全抑制茶园土壤硝化作用，且抑制有效期达28 d。因此，Nitrapyrin是一种针对茶园土壤比较高效的硝化抑制剂。 |
| 英文摘要: |
| 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 Nitrapyrin, 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. |
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