利用条件采样法在常熟稻田测定N_2O大气垂直通量初步观测结果  

PRELIMINARY RESULTS OF N_2O FLUX MEASUREMENT IN LOW ATMOSPHERE AT RICE PADDY IN CHANGSHU USING CONDITIONAL SAMPLING

作　　者：丁国安[1] 刘晶淼[1] 颜鹏[1] 王木林[1] 王淑凤[1] 程红兵[1] 孟昭阳[1] 程彦杰[1] 逯昌贵[1] 于海青[1] 温德永[1] 徐敬[1] 

机构地区：[1]中国气象科学研究院,北京100081

出　　处：《应用气象学报》2004年第4期456-467,共12页Journal of Applied Meteorological Science

基　　金：国家自然基金会重大项目 498992 73资助

摘　　要：1999年在常熟农业生态站试验稻田于水稻主要生长季 ,利用进口的条件采样装置对水稻低层大气N2 O的垂直通量进行了观测 ,并在 2 0 0 0年做了补充观测。结果如下 :各生长季测定的N2 O垂直通量值最多出现在 0～ 2 .0mg·m- 2 ·h- 1 之间 ;N2 O垂直通量平均日变化最大值出现在下午 ;插秧期和收割后N2 O垂直通量是各个生长季中最小的 ;观测到N2 O负通量现象的出现 ;在稻田用条件采样技术观测到的低层大气N2 O垂直通量大于国内用箱式法观测报道的土壤N2In the period from 1999 to 2000, the N 2O vertical flux in the low atmosphere during the main growing seasons of rice was measured using conditional sampling method over a rice paddy at Changshu Agriculture Ecological Station. The measurements indicate that N 2O vertical flux was mainly between 0～2.0 mg·m -2 ·h -1 , and the maximum daily averaged N 2O vertical flux was observed in the afternoon. The N 2O vertical flux in the transplant rice seedling period and reaping period was minimum among all the growing seasons. In these measurements, the minus N 2O vertical flux was also observed in some cases. The N 2O vertical flux by conditional sampling technique was bigger than that measured by Chamber method reported in some domestic journal papers. The reason of this difference between the two methods needs further study.

关 键 词：N2O 低层大气 垂直通量 条件采样法 稻田 

分 类 号：P412[天文地球—大气科学及气象学]