盐胁迫对柽柳和白刺光合日变化的影响  

Effect of Salt Stress on Diurnal Variation of Photosynthesis of Nitraria tangutorum and Tamarix chinensis

作　　者：刘玉娟[1] 贺康宁[1] 王伟璐 王辉[1] 徐特[1] 刘颖[1] 

机构地区：[1]北京林业大学水土保持学院,北京100083

出　　处：《中国农学通报》2015年第28期6-12,共7页Chinese Agricultural Science Bulletin

基　　金：青海省科技计划项目(2014-NK-A4-4)

摘　　要：为了筛选耐盐植物以便在盐碱地推广种植,以2年生的白刺和柽柳为试验材料,设定Na Cl溶液浓度梯度为0(CK)、100(Y1)、200(Y2)、400(Y3)、600(Y4)mmol/L,研究盐胁迫下对白刺和柽柳的光合日变化的影响。结果表明:(1)柽柳与白刺在盐胁迫下的日平均光合速率(Pn)变化趋势与非盐胁迫情况下基本相同;(2)白剌的光合能力强于柽柳;(3)随着盐浓度的增加,白刺的日平均光合速率(Pn)和羧化效率(CE)的降低速率比柽柳快;柽柳在盐胁迫下的水分利用效率(WUE)比非盐胁迫下高,但白刺仅在Y1和Y2处理下较对照高,并且柽柳的水分利用率始终大于白刺;(4)柽柳从Y3处理开始出现盐胁迫造成的非气孔限制,白刺从Y1处理就开始出现盐胁迫造成的非气孔限制。综上所述,说明柽柳的耐盐能力强于白刺,更适合在研究区条件下推广种植。In order to select salt-tolerant plants for planting in saline soil, 2-year-old Nitraria tangutorum and Tamarix chinensis were used as experimental materials, Na Cl concentration gradient was set as 0（CK）, 100（Y1）, 200（Y2）, 400（Y3）, 600（Y4） mmol/L, and photosynthetic diurnal variation was studied under salt stress.The results showed that：（1） the variation trend of the average photosynthetic rate（Pn） of Nitraria tangutorum and Tamarix chinensis under salt stress condition and non-salt stress condition were basically the same;（2） thephotosynthetic ability of Nitraria tangutorum was stronger than that of Tamarix chinensis;（3） the decline rate ofaverage daily net photosynthetic rate（Pn） and carboxylation efficiency（CE） of Nitraria tangutorum was greaterthan that of Tamarix chinensis with the increase of salt concentration; the water use efficiency（WUE） of Tamarix chinensis under salt stress was higher than that under non- salt stress, but the WUE of Nitraria tangutorum was higher than CK only in treatment Y1 and Y2, and the WUE of Tamarix chinensis was alwaysgreater than that of Nitraria tangutorum;（4） Tamarix chinensis began to appear non-stomatal limitation causedby salt- stress from treatment Y3, and Nitraria tangutorum began from treatment Y1. In summary, the salttolerance of Tamarix chinensis is stronger than that of Nitraria tangutorum and it is more suitable for plantingin the study area.

关 键 词：柽柳 白刺 盐胁迫 光合日变化 

分 类 号：S718.43[农业科学—林学]