摘要
以‘NC89’烟草品种为材料，用白纱布遮荫研究了100％、80％、50％和20％全光照处理对烤烟生长发育、光合特性及化学成分的影响。结果表明：（1）随光照强度的减弱，植株茎杆变细，叶片的长宽比增加，叶片数减少，出叶速度变慢，干物质重逐渐减少，并以80％的全光照条件下的株高、叶面积最大。（2）净光合速率（Pn）、气孔导度（Gs）、蒸腾速率（Tr）、叶绿素a／b值均随光照减弱而逐渐下降，胞间CO2浓度（Ci）、叶绿素含量逐渐升高；叶绿素荧光参数Fm、ФPSⅡ、Fv／Fm、QP值逐渐增加。（3）烟碱、淀粉、还原糖、水溶性总糖、总酚含量随光照减弱而降低，而总氮和钾含量升高。综合分析各项测定指标发现，在大于或等于80％全光照（光照强度为770～1125／Lmol‘m^-2·s^-1）条件下，烤烟的生长指标变化不大，品质指标符合不同卷烟工业需要，适合优质烟叶的生产。
This paper examined the growth, photosynthetic capabilities and chemical composition of fluecured tobacco under full light （100%） and light intensity at the transmittances of 80% ,50% and 20%. The results showed that：（1）With the reducing light intensity,tobacco stems became slender,the ratio between leaf long and wide increased,the number of leaves and total dry matter decreased. The plant height and leaf area under 80% full light condition were significantly higher than those under the other light intensity. （2） Photosynthetic indicators of Pn,Gs, Tr, Chl a/b decreased under low light, but Ci and chlorophyll contents increased, as well as fluorescence parameter of Fro, ФPSⅡ, Fv/Fm, QP. （3） As the reducing light intensity, starch content,reducing sugar content,total sugar and total phenol content lowed and total N and K content increased.
出处
《西北植物学报》
CAS
CSCD
北大核心
2007年第9期1833-1837,共5页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家烟草专卖局资助项目(901007)
关键词
光照强度
烤烟
光合特性
荧光参数
化学成分
light intensity
flue-cured tobacco
photosynthetic capability
fluorescence parameter
chemical composition
