安徽农业科学2017，Vol.45Issue(27)：6-9,4.
冀北沙荒地黄柳光合与蒸腾速率日变化特征
Diurnal Variation Characteristics of Photosynthesis and Transpiration Rate of Salix gordejevii in Sandy Land of Northern Hebei
摘要
Abstract
[Objective] The aim was to reveal the diurnal variation characteristics of photosynthesis and transpiration rate of Salix gordejevii in different slopes, and the relationship between photosynthesis and water consumption for transpiration.[Method] We took the sand barrier by Salix gordejevii in sand slope of northern Hebei as the research object, measured diurnal variation of photosynthesis, transpiration and PAR, atmospheric temperature and leaf surface temperature of Salix gro dejevii in different slope by using Li-6400 portable photosynthesis system, the diurnal variation of water use efficiency was calculated by photosynthesis and transpiration rate.[Result] The diurnal variation photosynthetic rate were different in different slope positions.Diurnal variation of photosynthesis in downslope presented a bimodal curve, that in mesoslope presented downtrend curve , and that in upslope presented downward trend .The daily maximum of P n in the downslope was 0.340μmol/(m2· s) and the daily average was 0.220 μmol/(m2· s).The daily maximum of Pn in mesoslope was 0.290 μmol/(m2· s), and the daily average was 0.210 μmol/(m2· s).The daily maximum of Pn in upslope was 0.350 μmol/(m2 · s), and the daily average was 0.220 μmol/(m2 · s). [Conclusion] The results provide theoretical basis for improving wind and sand control function of Salix gordejevii in northern Hebei sandy land and the reasonable use of Salix gordejevii resources.关键词
冀北沙荒地/黄柳/净光合速率/蒸腾速率/日变化Key words
Northern Hebei sandy land/Salix gordejevii/Net photosynthetic rate/Transpiration rate/Diurnal change分类
农业科技引用本文复制引用
蔺鑫,刘歌畅,杨晔,李玉灵,李晓刚..冀北沙荒地黄柳光合与蒸腾速率日变化特征[J].安徽农业科学,2017,45(27):6-9,4.基金项目
国家林业行业公益专项"环京津生态脆弱区生态经济植被建设技术研究"(1214019). （1214019）
