Influence of nitrification inhibitors on nitrification and nitrous oxide (N2O) emission from a clay loam soil fertilized with urea
Influence of nitrification inhibitors on nitrification and nitrous oxide (N2O) emission from a clay loam soil fertilized with urea
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DOI：
10.1016/j.soilbio.2009.12.014
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发表时间：
2010-04-01
影响因子：
9.7
通讯作者：
Edis, Robert
中科院分区：
文献类型：
--
作者：
Chen, Deli;Suter, Helen C.;Edis, Robert
通过室内培养试验，比较了硝化抑制剂3，4-二甲基吡唑磷酸盐（DMPP）和2-氯-6-（三氯甲基）-吡啶（N-serve）对澳大利亚南部Vertosol土壤硝化作用和氧化亚氮（N2 O）排放的影响。对照土壤中的硝化速率受到温度和湿度的强烈影响，在5至25 ℃之间，每增加10 ℃，硝化速率增加3.6倍。DMPP在5-15 ℃和40-60%的孔隙水填充率下有效抑制硝化作用42天。DMPP在25 ℃时，当土壤为40%WFPS时，也明显减缓了硝化作用，但在60%水填充的孔隙空间中效果较差。在所有试验条件下，N-serve有效地抑制硝化作用42天。尿素处理（无抑制剂）的N2 O排放量显着增加，随着温度和湿度的增加。总N2 O排放量与总硝化作用的比例不是恒定的，从5 ℃和40%WFPS时的0.03%左右变化到25 ℃和60%WFPS时的0.12%。DMPP和N-serve减少累积N2 O排放量超过42天超过65%，在所有施加的条件下。(c)2010爱思唯尔有限公司版权所有。
Laboratory incubation experiments were conducted to compare the effects of the nitrification inhibitors 3,4-dimethylpyrazole phosphate (DMPP) and 2-Chloro-6-(trichloromethyl)-pyridine (N-serve) on nitrification and nitrous oxide (N2O) emission from a Vertosol from southern Australia, under controlled moisture and temperature. Nitrification rates in the control soil were strongly influenced by the temperature and moisture, increasing by a factor of 3.6 for each 10 degrees C increase between 5 and 25 degrees C. DMPP inhibited nitrification effectively for 42 days at 5-15 degrees C and 40-60% water filled pore space (WFPS). DMPP also slowed nitrification appreciably at 25 degrees C when the soil was at 40% WFPS, but was less effective at 60% water filled pore space. N-serve inhibited nitrification effectively for 42 days under all test conditions. Emissions of N2O from the urea treatment (no inhibitors) significantly increased with increasing temperature and moisture. The ratio of total N2O emission to total nitrification was not constant and varied from around 0.03% at 5 degrees C and 40% WFPS to 0.12% at 25 degrees C and 60% WFPS. DMPP and N-serve reduced cumulative N2O emission over 42 days by more than 65% under all the imposed conditions. (c) 2010 Elsevier Ltd. All rights reserved.