%0 Journal Article
%T Temperature Sensitivity of Wheat Plant Respiration and Soil Respiration Influenced by Increased UV-B Radiation from Elongation to Flowering Periods<br>紫外（UV-B）辐射增强对拔节-孕穗期小麦植株呼吸和土壤呼吸的温度敏感性影响
%A CHEN Shu-tao
%A HU Zheng-hu
%A LI Han-mao
%A JI Yu-hong
%A YANG Yan-ping
%A <br>陈书涛
%A 胡正华
%A 李涵茂
%A 季宇虹
%A 杨燕萍
%J 环境科学
%D 2009
%I 
%X Field experiment was carried out in the spring of 2008 in order to investigate the effects of increased UV-B radiation on the temperature sensitivity of wheat plant respiration and soil respiration from elongation to flowering periods. Static chamber-gas chromatography method was used to measure ecosystem respiration and soil respiration under 20% UV-B radiation increase and control. Environmental factors such as temperature and moisture were also measured. Results indicated that supplemental UV-B radiation inhibited the ecosystem respiration and soil respiration from wheat elongation to flowering periods, and the inhibition effect was more obvious for soil respiration than for ecosystem respiration. Ecosystem respiration rates, on daily average, were 9%, 9%, 3%, 16% and 30% higher for control than for UV-B treatment for the five measurement days, while soil respiration rates were 99%, 93%, 106%, 38% and 10% higher for control than for UV-B treatment. The Q10s (temperature sensitivity coefficients) for plant respiration under control and UV-B treatments were 1.79 and 1.59, respectively, while the Q10s for soil respiration were 1.38 and 1.76, respectively. The Q10s for ecosystem respiration were 1.65 and 1.63 under CK and UV-B treatments, respectively. Supplemental UV-B radiation caused a lower Q10 for plant respiration and a higher Q10 for soil respiration, although no significant effect of supplemental UV-B radiation on the Q10 for ecosystem respiration was found.
%K UV-B
%K plant
%K soil
%K respiration
%K temperature sensitivity<br>UV-B
%K 植株
%K 土壤
%K 呼吸
%K 温度敏感性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=6A731F8C171BA3F20F8D0ED78E80493A&yid=DE12191FBD62783C&vid=340AC2BF8E7AB4FD&iid=94C357A881DFC066&sid=0522AC581E488FBF&eid=15F677B6C13C071A&journal_id=0250-3301&journal_name=环境科学&referenced_num=2&reference_num=27