论文部分内容阅读
采用土壤释放气体常压培养模拟装置,通过设置不同的氮肥施用量、土壤含水量、培养温度及土壤酸化等处理,明确N_2O释放特性及对环境因素的响应。结果表明,纯氮施入量由70 mg/kg增加至300 mg/kg,N_2O释放总量分别增加了32.9%(对照)和21.2%(酸化土壤);含水量由15%增加至25%;N_2O释放总量分别增加26.5%(对照)和16.1%(酸化土壤)。不同培养温度对比发现,N_2O释放总量变化趋势为25℃处理>35℃处理>15℃处理,25℃处理与15℃处理相比,N_2O释放总量增加了12.7%(对照)和20.0%(酸化土壤)。与对照处理相比,酸化处理N_2O释放总量平均增幅均高于5%。试验所设定的条件范围内,增施氮肥、提高含水量、土壤酸化导致N_2O释放强度增大,合适的培养温度有利于N_2O释放。
Atmospheric pressure simulator was set up to simulate the release characteristics of N 2 O and its response to environmental factors by setting different nitrogen application rates, soil water content, incubation temperature and soil acidification. The results showed that the application of pure nitrogen increased from 70 mg / kg to 300 mg / kg and the total amount of N 2 O increased by 32.9% (control) and 21.2% (acidified soil) respectively; the water content increased from 15% to 25% The total N_2O release increased by 26.5% (control) and 16.1% (acidified soil) respectively. Compared with 15 ℃ treatment, the total N_2O release increased by 12.7% (control) and 20.0% (control) at 25 ℃ and 25 ℃ compared with that at 15 ℃ Acidified soil). Compared with the control treatment, the average increase of the total amount of acidified N_2O release was higher than 5%. Under the conditions set in the experiment, nitrogen fertilizer was added to increase the water content, and soil acidification resulted in the increase of N 2 O release intensity. Appropriate incubation temperature was favorable for N 2 O release.