CAJ | 학술논문

大扁杏、中国沙棘和黑果腺肋花楸是辽西地区的主要造林灌木树种。本文利用稳定同位素技术测定3种灌木叶片的稳定碳同位素比值（δ13C值），分析它们的长期水分利用效率（WUE）；并结合3种灌木的叶性状研究，分析水分利用效率与叶性状各因子之间的相关性，探讨3个造林灌木树种在水分胁迫条件下的生理响应特征。结果表明：3种灌木的水分利用效率差异显著（P<0.05），其中，中国沙棘水分利用效率最高，大扁杏次之，黑果腺肋花楸最低；叶性状各因子之间相关性显著；水分利用效率与单位重量叶氮浓度（Nmas ）、比叶面积（SLA）和全碳含量呈正相关，与单位面积叶氮浓度（Narea）和C/N呈负相关。水分利用效率和叶性状特征的研究结果表明3种灌木分别采取了不同的生理策略来适应水分胁迫环境。
대편행、중국사극화흑과선륵화추시료서지구적주요조림관목수충。본문이용은정동위소기술측정3충관목협편적은정탄동위소비치（δ13C치），분석타문적장기수분이용효솔（WUE）；병결합3충관목적협성상연구，분석수분이용효솔여협성상각인자지간적상관성，탐토3개조림관목수충재수분협박조건하적생리향응특정。결과표명：3충관목적수분이용효솔차이현저（P<0.05），기중，중국사극수분이용효솔최고，대편행차지，흑과선륵화추최저；협성상각인자지간상관성현저；수분이용효솔여단위중량협담농도（Nmas ）、비협면적（SLA）화전탄함량정정상관，여단위면적협담농도（Narea）화C/N정부상관。수분이용효솔화협성상특정적연구결과표명3충관목분별채취료불동적생리책략래괄응수분협박배경。
Prunus armeniaca, Hippophae rhamnoides ssp. sinensis and Aronia melanocarpa are main shrubs for afforestation in western Liaoning. Stable isotope technique was used to test the δ13C value for evaluateing the water use efficiency (WUE) of three shrubs, and the relationship between WUE and leaf traits were studied for discussing the physiological strategy of three shrubs in water stress condi-tion. The difference of leaf δ13C value among three shrubs was significant; H. rhamnoides ssp. sinensis has exclusively higher WUE than P. armeniaca and A. melanocarpa, and the WUE of P. armeniaca was higher than A. melanocarpa. There was significant correlation among leaf traits. The WUE was positively correlated with Nmass, SLA and total C content, and was negative correlation with Narea and C/N ratio. The WUE and leaf traits suggested that three shrubs adapted to water stress condition by different physiological strategies.