水分胁迫对金太阳杏幼树蒸腾、光合特性的影响  

The effect of soil water stress on photosynthetic and transpiration characters of apricot cultivar Sungold

作　　者：高峻[1] 吴斌[1] 孟平[2] 张劲松[2] 

机构地区：[1]北京林业大学水保学院,北京100083 [2]中国林业科学研究院林业研究所国家林业局林木培育重点试验室,北京100091

出　　处：《河北农业大学学报》2007年第3期36-40,共5页Journal of Hebei Agricultural University

基　　金："十五"国家科技攻关课题(2001BA510B04);国家林业局重点科研项目(2003-044-L44)

摘　　要：通过对盆栽金太阳杏幼树设置不同土壤水分胁迫处理,利用Li-COR6400便携式光合仪测定杏幼树叶片蒸腾、光合生理特性及其日变化过程,探讨了土壤水分胁迫对杏幼树光合、蒸腾生理特性的影响,以期为建立节水高效的杏树栽培模式提供依据。结果表明:土壤水分胁迫条件下,杏幼树叶片对光和CO2的响应均发生变化,光饱和点、光补偿点、表观光量子效率以及CO2补偿点、CO2饱和点和叶片的羧化效率均降低;土壤水分胁迫条件下,光合速率、蒸腾速率、气孔导度以及水分利用效率降低,且日变化曲线也发生变化,峰值出现的时刻和大小不同。In this research, The response of photosynthetic and transpiration characters of apricot cultivar Sungold to soil water stress were studied using the Li - COR6400 portable photosynthetic system. The results and conclusions will provide scientific guidance to the development of high efficient water - saving cultivation of apricot. Four soil water treatment levels were used by pot experiments： about 75% （control）, 55%, 40% and 30% of soil water holding capacity. The results are summarized： 1） The response of leaves of apricot cultivar Sungold to light and CO2 changes under soil water stress conditions. Light saturation point, light compensation point, apparent quantum yield, and CO2 saturation point, compensation point and carboxylation efficiency are decreased; 2） The photosynthetic rate, transpiration rate, stomatal conductance and water use efficiency （WUE） are also decreased under soil water stress conditions. Those diurnal variation curves change and the regularity of their curves and values are different

关 键 词：水分胁迫 光合特性 蒸腾特性 金太阳杏 

分 类 号：S662.2[农业科学—果树学]