【摘要】 以5个种源的软枣猕猴桃2年生幼苗为试材,采用LI-6400便携式光合测定系统测定其光合指标,分析不同种源软枣猕猴桃的光合日变化,揭示种源间光合特性的差异。结果表明:不同种源软枣猕猴桃幼苗净光合速率、气孔导度和水分利用效率日变化呈"双峰"曲线;蒸腾速率有"单峰型"和"双峰型"2种形式;胞间CO₂浓度呈‘W’型趋势;不同种源间存在一定的差异,各时间段的光合指标大小、峰值的大小及出现的时间有所不同。不同种源间的净光合速率、蒸腾速率、气孔导度、胞间CO₂浓度和水分利用效率存在极显著差异,通过隶属函数值综合评价,敦化和林口种源的光合能力强,属于较高光效种源。更多还原

【Abstract】 Five provenances of Actinidia arguta 2 years seedlings were used as test materials,the photosynthetic index was determined by using LI-6400 portable photosynthesis system.This paper study analyzed the diurnal variation of photosynthesis of different provenances,and revealed the difference of photosynthetic characteristics from different provenances.The results showed that net photosynthetic rate,stomatal conductance and water use efficiency diurnal variation in bimodal curve,transpiration rate in two types of unimodal,bimodal curve,intercellular CO₂ concentration in ’W’ type,and there were some differences among different provenances.The photosynthetic index,the peak value and the time of emergence were different.There were significant differences in net photosynthesis rate,transpiration rate,stomatal conductance,intercellular CO₂ concentration and water use efficiency of different provenances.By using the photosynthesis characteristics to do the Fuzzy mathematics evaluation,Dunhua and Linkou provenances had higher photosynthetic capacity,which belonged to the high light efficiency of provenance.更多还原