To determine the changes in soil denitrification and N2 O emission from crop rhizosphere under ozone( O3) stress and the declined solar irradiance,ozone treatments in OTCs( open top chambers) and solar irradiance manipulate in shading nets were used. The effect of increased atmospheric surface O3 level and declined solar irradiance with their combination contents on soil denitrification in rhizosphere of winter wheat( Triticum aestivum) was thus investigated,during the growing / development( G / D) periods ...
【基金】
国家自然科学基金资助项目(40775072);
南京信息工程大学校基金项目(20080312)
【更新日期】
2014-12-22
【分类号】
S154.1
【正文快照】
近地层臭氧是非常重要的污染气体,是控制低层大气化学反应与循环的重要因子,占总氧化剂的90%以上[1]。地球对流层大气平均O3浓度已经从工业革命前的38 n L/L上升到目前的50 n L/L,这个浓度已经超过了敏感作物O3伤害阀值AOT40的25%[2],在过去的30a中,北半球O3浓度以每年0.5%—2%