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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Use of Nitrogen Isotope To Determine Fertilizer- and Soil-Derived Ammonia Volatilization in a Rice/Wheat Rotation System
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Use of Nitrogen Isotope To Determine Fertilizer- and Soil-Derived Ammonia Volatilization in a Rice/Wheat Rotation System

机译：利用氮同位素测定水稻/小麦轮作系统中肥料和土壤衍生的氨挥发

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The nitrogen (N) isotope method reveals that application of fertilizer N can increase crop uptake or denitrification and leaching losses of native soil N via the "added N interaction". However, there is currently little evidence of the impact of added N on soil N losses through NH3 volatilization using N-15 methodologies. In the present study, a three-year rice/wheat rotated experiment with 30% N-15-labeled urea applied in the first rice season and unlabeled urea added in the following five crop seasons was performed to investigate volatilization of NH3 from fertilizer and soil N. We found 9.28% of NH3 loss from N-15 urea and 2.88-7.70% declines in N-15-NH3 abundance occurred during the first rice season, whereas 0.11% of NH3 loss from N-15 urea and 0.02-0.21% enrichments in N-15-NH3 abundance happened in the subsequent seasons. The contributions of fertilizer- and soil-derived N to NH3 volatilization from a rice/wheat rotation were 75.8-88.4 and 11.6-24.2%, respectively. These distinct variations in N-15-NH3 and substantial soil-derived NH3 suggest that added N clearly interacts with the soil source contributing to NH3 volatilization.
机译：氮（N）同位素方法表明，施用氮肥可通过“增加的氮相互作用”增加农作物的吸收或反硝化作用以及原生土壤氮的淋失。但是，目前几乎没有证据表明使用N-15方法通过NH3挥发增加的N对土壤N损失的影响。在本研究中，进行了一项为期三年的水稻/小麦轮作试验，其中在第一个水稻季节施用了30％N-15标记的尿素，并在随后的五个作物季节中添加了未标记的尿素，以研究肥料和土壤中NH3的挥发N.我们发现在第一个水稻季节，N-15尿素损失了NH3的9.28％，N-15-NH3丰度减少了2.88-7.70％，而N-15尿素的损失了0.11％的NH3和0.02-0.21％ N-15-NH3丰度的富集发生在随后的季节。稻/小麦轮作中，肥料和土壤来源的氮对NH3挥发的贡献分别为75.8-88.4％和11.6-24.2％。 N-15-NH3和大量土壤衍生的NH3的这些明显差异表明，添加的N显然与土壤源相互作用，导致NH3挥发。

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