| 赖晶晶,兰婷,王启,谭春林,李梦潇.硝化抑制剂对紫色土硝化作用及N2O排放的影响[J].农业环境科学学报,2019,38(6):1420-1428. |
| 硝化抑制剂对紫色土硝化作用及N2O排放的影响 |
| Effects of nitrification inhibitors on purple soil nitrification and N2O emissions |
| 投稿时间：2018-09-21 |
| DOI：10.11654/jaes.2018-1203 |
| 中文关键词: 硝化作用 硝化抑制剂 紫色土 硝化速率 N2O产生速率 |
| 英文关键词: nitrification nitrification inhibitors purple soil nitrification rate N2O production rate |
| 基金项目:国家重点研发计划项目（2017YFD0200100）；国家自然科学基金项目（41501243） |
|
| 摘要点击次数: 2565 |
| 全文下载次数: 2102 |
| 中文摘要: |
| 为探讨硝化抑制剂对紫色土硝化作用及N2O排放的抑制效果，通过室内培养试验，研究在25℃，60%最大田间持水量条件下，4种硝化抑制剂[双氰胺（DCD）、3，4-甲基吡唑磷酸盐（DMPP）、2-氯-6-三氯甲基吡啶（Nitrapyrin）、对羟基苯丙酸甲酯（MHPP）]对四川地区石灰性紫色土无机氮含量、硝化速率及N2O产生速率变化特征的影响，并以酸性紫色土作对比。结果表明，与对照处理相比，4种硝化抑制剂均能抑制两种土壤中NH4+向NO3-的转化，同时降低N2O的排放，但是抑制效果存在差异。其中，对石灰性紫色土硝化速率的抑制效果为MHPP（93%~193%） > Nitrapyrin（91%~191%） > DMPP（9%~58%） > DCD（6%~14%），对酸性紫色土硝化速率的抑制效果为MHPP（76%~116%） > Nitrapyrin（62%~109%） > DCD（59%~75%） > DMPP（26%~43%）。硝化抑制剂对石灰性紫色土和酸性紫色土N2O产生总量的抑制效果分别为46%~76%和32%~54%。总体而言，相较DCD和DMPP，Nitrapyrin和MHPP两种硝化抑制剂对供试土壤硝化速率和N2O产生速率均表现出较强的抑制效果。 |
| 英文摘要: |
| Calcareous purple soils in the Sichuan Province are characterized by weak nitrogen retention, because of their strong nitrification. In order to investigate the effects of nitrification inhibitors on purple soil nitrification and N2O emissions, we explored the variability of soil inorganic nitrogen content, nitrification rate, and N2O production rate. This was done after the addition of nitrification inhibitors[dicyandiamide (DCD), 3, 4-dimethylpyrazole phosphate (DMPP), 2-chloro-6-(trichloro-methyl) pyridine (Nitrapyrin), methyl 3-(4-hydroxyphenyl) propionate (MHPP)] and nitrogen fertilizers to the calcareous and acid purple soils. The calcareous purple soil was compared with an acid purple soil obtained after incubation at 25℃ and with 60% water holding capacity (WHC). Our results showed that four nitrification inhibitors successfully impeded the conversion of NH4+ to NO3- and reduced the emissions of N2O for both soils; The inhibitory efficiencies of nitrification inhibitors on the calcareous purple soil nitrification rates were:MHPP (93%~193%) > Nitrapyrin (91%~191%) > DMPP (9%~58%) > DCD (6%~14%), while the efficiencies on the acidic purple soil nitrification rates were:MHPP (76%~116%) > Nitrapyrin (62%~109%) > DCD (59%~75%) > DMPP (26%~43%). The inhibitory effects of nitrification inhibitors on the total N2O production in the calcareous and acidic purple soils were 46%~76% and 32%~54%, respectively. In summary, Nitrapyrin and MHPP showed strong inhibitory effects, compared with DCD and DMPP, on nitrification and N2O generation rates of the tested soils. Our results provide a theoretical basis for the field application of nitrification inhibitors to purple soils, encouraging the use of moderate amounts of nitrogen fertilizers, and reducing the environmental risk linked to the use of nitrogen fertilizers. |
| HTML
查看全文
查看/发表评论 下载PDF阅读器 |
|
|
|
