盐胁迫对锦带花生长及光合特性的影响  

Effect of Salt Stress on the Growth and Photosynthetic Characteristics of Weigela florida

作　　者：任志彬[1] 聂庆娟[1] 王志刚[1] 黄大庄[1] 项亚飞 冯学全 

机构地区：[1]河北农业大学林学院,河北保定071001 [2]河北雾灵山国家自然保护区管理局,河北承德067300

出　　处：《北方园艺》2011年第7期93-97,共5页Northern Horticulture

摘　　要：以锦带花为试材,采用盆栽法,研究不同土壤含盐量对锦带花生长及光合特性的影响。结果表明:随着盐含量的增加,锦带花的相对新梢生长量在盐含量为0.1%时有所增加,当盐含量≥0.2时才显著降低。盐害指数也随着盐含量的增加而逐渐增加,在盐含量≤0.2%时增加不显著,当盐含量≥0.3%时才显著增加。随着盐含量的增加,锦带花的净光合速率、气孔导度、蒸腾速率在盐含量为0.1%时有所增加,当盐含量≥0.2%时才逐渐降低,胞间CO2浓度变化趋势与其相反,在盐含量为0.1%时降低,随着盐含量的增加又逐渐增加。在盐含量≤0.3%,锦带花的水分利用效率变化不明显,这说明锦带花可以通过降低蒸腾速率维持自身的水分利用效率,当盐含量为0.4%时,锦带花的水分利用效率显著降低。在光响应过程中,随着光强的增加,各盐含量的净光合速率都逐渐增加,盐含量越大,其增加的幅度越小。此外盐胁迫增加了锦带花的光补偿点,降低锦带花的光饱和点。Effect of salt stress on the growth and photosynthetic characteristics of Weigela florida were studied.The results showed that the relative growth of new tress was enhanced at the salt concentration 0.1%,but decreased when decreased while salt concentration≥0.2%.The salt injure index increased gradually with the increasing of salt concentrations.It increased unobviously while salt concentration ≤0.2% but increased significantly while salt concentration ≥0.3%.The content of chlorophyll,Pn,Gs and Tr was enhanced at the salt concentration 0.1%.But decreased while salt concentration ≥ 0.2%.On the contrary,the Ci decreased at the salt concentration 0.1% but increased gradually while salt concentration ≥0.3%.The water efficiency was maintained by decreasing Tr while salt concentration ≤0.3% but decreased significantly while salt concentration 0.4%.With the increasing of PAR,the Pn increased gradually at each salt concentration.The Pn at the lower salt concentration increased more quickly than the Pn at the high salt concentration.Besides the light-compensation point increased with the increasing of salt concentrations,but the light-saturation point decreased.

关 键 词：盐胁迫 锦带花 光合特性 

分 类 号：S6[农业科学—园艺学]