应用生态学报2009，Vol.20Issue(7)：1650-1656,7.
氧化亚氮对樟树幼苗生长及光合作用的影响
Effects of NO2 on Cinnamomum camphora seedlings growth and photosynthesis
摘要
Abstract
A 2-month fumigation experiment was conducted with opened top chambers to study the effects of different concentration (0.1, 0.5, and 4.0 μl·L-1) NO2 on the growth and photosynthesis of 1-year Cinnamomum camphora seedlings. Fumigation with 0.1 and 0.5 μl NO2·L-1 promoted the growth of the seedlings, while with 4.0 μl NO2·L-1 was in adverse. The diurnal variation of net photosynthetic rate (Pn) presented two-peaks, with an obvious depression in midday. 0.5 μl NO2·L-1 increased the Pn, the maximum of Pn reached 8.542 μmol CO2·m-2s-1; 4.0 μl NO2·L-1 decreased the Pn in most period of time; while the effect of 0.1 μl NO2·L-1 varied with time period. Fumigation with 0.5 and 4.0 μl NO2·L-1 increased the maximal and minimal values of stomatal conductance (Gs) and intercellular CO2 concentration (Ci), while 0.1 μl NO2·L-1 increased the maximal and minimal values of Ci but decreased the maximal and minimal values of Gs. At the middle and late stages of fumigation, the mean Pn of the seedlings treated with 0.5 μl NO2·L-1 was significantly higher than that treated with 0.1 and 4 μl NO2·L-1. At the early stage of fumigation, 0.5 and 4.0 μl NO2·L-1 significantly decreased the maximal PSⅡ efficiency (Fv/Fm); and at the late stage, 4.0 μl NO2·L-1 still decreased the Fv/Fm significantly.关键词
NO2/樟树/熏气/生长/光合作用Key words
NO2/ Cinnamomum camphora/ fumigation/ growth/ photosynthesis.分类
农业科技引用本文复制引用
陈卓梅,陈英旭,杜国坚..氧化亚氮对樟树幼苗生长及光合作用的影响[J].应用生态学报,2009,20(7):1650-1656,7.基金项目
浙江省科学技术厅重点计划项目(2005C22056)资助. （2005C22056）
