荒漠绿洲区大田甜叶菊光合特性研究  

Study on photosynthetic characteristics of Steviain desert oasis field

作　　者：董海涛[1,2] 孙宏义[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所,中国生态系统研究网络临泽内陆河流域研究站,甘肃兰州730000 [2]中国科学院大学,北京100049

出　　处：《甘肃农业大学学报》2015年第6期42-46,共5页Journal of Gansu Agricultural University

基　　金：科技部农业科技成果转化项目(2013GB2C000683)

摘　　要：在甘肃省河西走廊中部黑河中游绿洲边缘区,于8月中旬,对大田甜叶菊光合特性进行了分析研究.结果表明:大田甜叶菊光合速率日变化呈"双峰型",存在中午光合下调现象,日均值为(9.97±0.34)μmol/(m^2·s);蒸腾速率日变化呈"单峰型",日平均值为(5.99±0.54)mmol/(m^2·s);气孔导度变化趋势与蒸腾速率相似,日变化平均值为(0.15±0.01)mol/(m^2·s);甜叶菊水分利用效率平均值为1.76μmol CO_2/mmol H_2O.同时分析了光合指标与植株生物量,环境因子的相关性,发现光合速率与干叶产量,茎干生物量具有显著正相关性.This paper analyzed Stevia photosynthetic characteristics of field in mid-August at Hexi corridor in Gansu Heihe oasis midstream. Results showed that diurnal photosynthetic rate variation of Stevia was ‘bimodal＇, the daily average was （9. 97 ± 0. 34） μmol/（m2 . s）, existing noon photosynthetic down phenomenon. Transpiration rate change was ‘single peak’, the daily average of （5. 99±0. 54） mmol/（m2 . s）, stoma conductance and transpiration rate similar trends, diurnal variation with an average of 0. 15±0. 01 mol/（m2 .s）. Stevia water use efficiency with an average of 1.76 μmol CO2/mmol H2O. Simultaneous analysis of the relationship of photosynthetic parameters and plant biomass, environmental factors, pointed out the photosynthetic rate and dry leaf yield, stem biomass has a significant positive correlation.

关 键 词：甜叶菊 光合作用 环境因子 相关性 

分 类 号：S567[农业科学—中草药栽培]