黑河试验区春小麦田间的环境因子对蒸腾和光合作用的影响  

THE INFLUENCE OF ENVIRONMENTAL FACTORS ON PHOTOSYNTHESIS AND TRANSPIRATION IN SPRING WHEAT FIELD OF HEIHE AREA

作　　者：贾立[1] 王介民[1] 刘巍[1] 

机构地区：[1]中国科学院兰州高原大气物理研究所

出　　处：《高原气象》1994年第3期359-368,共10页Plateau Meteorology

摘　　要：本文利用１９９２年黑河ＢＩＯＰ（生物气象加强观测）期间光合作用综合分析仪在田间测定的资料，分析了干旱区春小麦单叶片气孔导度、光合速率和蒸腾强度的日变化及环境因子的影响。分析结果表明；光合作用和蒸腾强度与太阳辐射、环境温度、水汽压差及土壤湿度等主要环境因子的影响密切相关。同时，我们根据Ｊａｒｖｉｓ的理论发展了光合有效辐射、环境温度和水汽压差对气孔导度影响的半经验模型，根据此气孔运动综合模型建立了春小麦单叶片蒸腾强度的计算模型，分析了诸环境因子对蒸腾强度的影响程度。The data measured by a LI-6200 portable photosynthetic system during the Biometeorological Intensive Observation Period (BIOP) of HEIFE in 1992 are used to study the influence of environmental factors on stomatal conduotance,photosynthetic rate and transpiration intensity of spring wheat in the arid Heihe River Basin The results show that photosynthetic rate and transpiration intensity are closely related to main environmental factors such as solar radiation,ambient temperature ,vapour pressure deficit and soil moisture Meanwhile,a semi-empirical model,which describes the influence of photosynthetically active radiation,ambient temperature and vapour pressure deficit on stomatal conduatance,is developed in the light of Jarvis theory Furthermore,a funation evaluating single lear transpiration intensity of spring wheat is deduced from the stomatal model Then values calculated by this function and the modified Penman-Monteith equation with values measured are compared

关 键 词：蒸腾 环境因子 春小麦 黑河地区 

分 类 号：S512.101[农业科学—作物学]