%0 Journal Article
%T Influence of Enhanced UV-B Radiation on Respiration Rate and N2O Emission from Soil-Winter Wheat System<br>地表UV-B辐射增强对土壤-冬小麦系统呼吸速率和N2O排放的影响
%A HU Zheng-hu
%A JIANG Jing-yan
%A NIU Chuan-po
%A SUN Wen-juan
%A HUANG Yao
%A <br>胡正华
%A 蒋静艳
%A 牛传坡
%A 孙文娟
%A 黄耀
%J 环境科学
%D 2007
%I 
%X To investigate the impact of enhanced UV-B radiation on respiration rate and N2O emission from soil-winter wheat system, outdoor pot experiments with simulating 20% supplemental of UV-B were conducted, and static dark chamber\|gas chromatograph method were used. Results indicated that the enhanced UV-B radiation did not change the seasonal pattern of respiration rate and N2O emission. Enhanced UV-B radiation declined the rate of soil-winter wheat system's respiration but had no significant impact on N2O emission in turning-green stage. While enhanced UV-B radiation declined both respiration rate and the N2O emission in elongation-pregnant stage. From heading to maturity, the respiration rate and N2O emission from soil-winter wheat system were not found to be significantly difference under UV-B radiation compared with ambient conditions. A further analysis suggested that enhanced UV-B radiation declined significantly cumulative amount of N2O from soil-winter wheat system from wheat turning green to full heading stage, while no significant impact occurred from full heading to maturity.
%K UV-B radiation
%K soil-winter wheat ecosystem
%K respiration rate
%K N2O emission<br>UV-B辐射
%K 土壤-冬小麦系统
%K 呼吸速率
%K N2O排放
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=9404B6830A72B53A5DE3C1ED8F08439F&yid=A732AF04DDA03BB3&vid=D3E34374A0D77D7F&iid=38B194292C032A66&sid=78BF76CF5B7CB0F2&eid=B1989ED92BA7E896&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=25