UV-B辐射滤减处理对烤烟光合特性的影响  

Effects of Attenuated UV-B Radiation Supply on Photosynthetic Characters of Flue-cured Tobacco

作　　者：刘彦中[1] 纪鹏[2] 陈宗瑜[2] 

机构地区：[1]云南农业大学烟草学院,昆明650201 [2]云南农业大学农学与生物技术学院,昆明650201

出　　处：《中国烟草科学》2011年第3期41-45,共5页Chinese Tobacco Science

基　　金：国家烟草专卖局项目"烟叶品牌导向原料体系研究"(110200801034)子课题--"低纬高原生态环境对烤烟品牌原料影响的机理研究"

摘　　要：以烤烟品种K326为试验材料,通过覆盖不同厚度透明薄膜滤减UV-B辐射,研究了透过率分别为100%(CK)、75%(A)、50%(B)、35%(C)不同强度UV-B辐射处理下,K326成熟初期的光响应曲线参数与不同UV-B辐射强度的关系。结果表明,烤烟K326的净光合速率(Pn)、水分利用效率(WUE)及光能利用效率(LUE)与UV-B辐射透过率密切相关。当UV-B辐射透过率处于35%～75%时,Pn、WUE及LUE均维持在较高水平。认为在通海县海拔高度下,此透过率范围是K326处于成熟初期对UV-B辐射强度变化较为理想的响应区间,此时较适宜的PPFD维持在800～1 600μmol/(m2.s)之间。By the method of covering with different thickness plastic films to attenuate UV-B radiation,this study investigated the light-response parameters of tobacco cultivar K326 at its early maturity stage when the UV-B transmittance was 100%（CK）,75%（A）,50%（B）,35%（C）.The results showed that the net photosynthetic rates（Pn）,water use efficiency（WUE） and light use efficiency（LUE） were closely related to UV-B transmittance.When UV-B transmittance varied 35% and 75%,the Pn,WUE and LUE to maintain high states,and we regarded this range of transmittance related to the elevation of Tonghai County was a relative ideal responsive interval of K326.Meanwhile,relative proper PPFD were between 800 μmol/（m2.s） and 1 600 μmol/（m2.s）.

关 键 词：烤烟 UV-B辐射滤减 光合特性 光响应曲线 

分 类 号：S572[农业科学—烟草工业]