开放式空气CO2浓度增高试验中的NO和NO2地气交换观测研究

应用生态学报 ›› 2002, Vol. ›› Issue (10): 1264-1268.

开放式空气CO₂浓度增高试验中的NO和NO₂地气交换观测研究

宋涛^1,2, 郑循华¹, 王跃思¹, 徐仲均¹, 韩圣慧¹, 朱建国³

1. 中国科学院大气物理研究所, 北京, 100029;南京气象学院, 南京, 210044;
2. 中国科学院大气物理研究所, 北京, 100029;
3. 中国科学院南京土壤研究所, 南京, 210008

收稿日期:2002-06-12 修回日期:2002-08-18
通讯作者: 郑循华
基金资助:
国家自然科学基金(40175030,49975027);中国科学院知识创新重要方向项目(KZCX2408).

SONG Tao^1,2, ZHENG Xunhua¹, WANG Yuesi¹, Xu Zhongjun¹, HAN Shenghui¹, ZHU Jianguo³

1. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029;
2. Nanjing Institute of Meteorology, Nanjing 210044;
3. Nanjing Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008

Received:2002-06-12 Revised:2002-08-18

摘要/Abstract

摘要： 介绍了农田FACE(free-air CO₂ enrichment)试验中的NO和NO₂地气交换观测方法,即静态暗箱采样—NO和NO₂化学发光分析法,并对观测结果进行了分析讨论.此观测方法简单、易于操作,并可获得可靠的NO和NO₂净交换通量观测结果.在稻麦轮作农田的旱地阶段,无论FACE还是对照处理,NO主要表现为地面净排放,NO₂主要表现为地面净吸收.逐日的NO净排放不依赖于土壤温度,但却与土壤含水量呈线性负相关(R²=0.82,P<0.001).NO₂净吸收具有明显的季节变化特征,逐日的净吸收通量随土壤温度和土壤含水量的变化可分别用抛物线方程拟合(温度:R²=0.74,P<0.001;含水量:R²=0.69,P<0.001).大气CO₂浓度升高200±40μmol·mol^-1使NO净排放减弱19%(t检验P=0.096),NO₂净吸收减弱10%(t检验P=0.26),这主要是植物生长受到促进的缘故.

关键词: NO, NO₂, 地气交换, CO₂浓度增高, 静态暗箱法, 排毒代谢机制, 食物利用, 银中杨, 重金属胁迫, 舞毒蛾

Abstract: Amethod for measuring NOand NO₂ exchanges between cultivated lands and the atmosphere in a FACE (free-air CO₂ enrichment) study is described. With this method, gas is sampled with a technique of static-opaque-chamber and the fluxes of NOand NO₂ exchanges are determined by analyzing the NOand NO₂ concentrations with a chemiluminescent NOx analyzer. Application of this method in the FACEstudy of a rice-wheat ecosystem has indicated that reliable data on the exchange fluxes could be obtained. Over the non-waterlogged period of a rice-wheat rotation, net emission of NOfrom the fields was observed, while net uptake of NO₂ occurred. The daily net emission of NOdid not correlated with the soil temperature, but negatively depended upon soil moisture (R²=0.82,P<0.001). Asignificant seasonal variation in the net uptake of NO₂ was observed, which was regulated by wheat growth status. The daily uptake of NO₂ depended upon both soil temperature and soil moisture. The dependence for each could be described with a parabola function (for soil temperature:R²=0.74,P<0.001;for soil moisture:R²=0.69,P<0.001). An elevation of atmospheric CO₂ by 200±40μmol·mol^-1 mitigated the net emission of NOby 19% (t-test P=0.096) and might be possible to reduce the net uptake of NO₂ by 10% (t-test P=0.26), which was likely due to the stimulated wheat growth.

Key words: Populus alba×P. berolinensis, excretion mechanism., Lymantria dispar, food utilization, heavy metal stress

中图分类号:

X511

宋涛, 郑循华, 王跃思, 徐仲均, 韩圣慧, 朱建国. 开放式空气CO₂浓度增高试验中的NO和NO₂地气交换观测研究[J]. 应用生态学报, 2002, (10): 1264-1268.

SONG Tao, ZHENG Xunhua, WANG Yuesi, Xu Zhongjun, HAN Shenghui, ZHU Jianguo. [J]. Chinese Journal of Applied Ecology, 2002, (10): 1264-1268.

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开放式空气CO₂浓度增高试验中的NO和NO₂地气交换观测研究

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