利用弱光延长光照时间对温室烟苗光合作用与生长的影响  

Effects of prolonged weak light duration on photosynthesis and growth of greenhouse tobacco seedlings

作　　者：吴云平 朱信[2] 王瑞[3] 张光辉[3] 李满良[2] 

机构地区：[1]安徽中烟工业公司,安徽省合肥市230088 [2]湖北省烟草公司恩施州公司宣恩姻叶分公司,湖北省宣恩县445500 [3]湖北省烟草公司恩施州公司,湖北省恩施市445000

出　　处：《中国烟草学报》2011年第5期59-63,共5页Acta Tabacaria Sinica

基　　金：安徽中烟工业公司科技重大专项“烟叶区域风格差异分析及上部烟研究”(20092009)

摘　　要：以烤烟K326为材料,从第6片叶出现至成苗,每天于日落后采用光强约为70μmol.m-2.s-1的人工光源照射烟苗4 h,研究利用弱光延长光照时间对温室烟苗光合作用与生长的影响。结果表明:烟苗经过弱光延长光照时间处理后,光饱和点(LSP)和最大净光合速率(Pn max)没有明显变化,而光补偿点(LCP)明显下降,在弱光下的Pn和表观量子效率(AQY)明显升高;叶绿素a、b含量明显升高,叶绿素a/b值明显下降。利用弱光延长光照时间可以提高烟苗的日光合总量,增加烟苗光合生产能力,并促进烟苗的全面生长,提高烟苗的素质。Effects of prolonged weak light duration on photosynthesis and growth of greenhouse tobacco seedlings were studied to provide useful references for the improvement of tobacco seedling management. Tobacco seedlings of flue-cured tobacco K326 were irradiated by artificial light source with intensity of 70 6 leaf stage to seedling establishment. Results showed no change thetie rate （ P ） after prolonging light duration by using weak μmol · m·2. s - 1 for 4 hours daily after sunset starting from for light saturation point （LSP） and maximum net photosynlight. However, light compensation point （LCP） decreased, Pn under weak light and apparent quantum yield （AQY） increased. Content of chlorophyll a and chlorophyll b increased while the value of chlorophyll a/b decreased. Prolonging light duration by using weak light can enhance daily photosynthesis and photosynthetic production capacity, promote seedlings growth and hence improve quality .

关 键 词：烤烟 光照时间 光合作用 

分 类 号：S572[农业科学—烟草工业]