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不同生育期水分胁迫对夏玉米叶片光合生理特性的影响
引用本文:田琳,谢晓金,包云轩,胡继超,於俐,王金鑫. 不同生育期水分胁迫对夏玉米叶片光合生理特性的影响[J]. 中国农业气象, 2013, 0(6): 655-660
作者姓名:田琳  谢晓金  包云轩  胡继超  於俐  王金鑫
作者单位:[1]南京信息工程大学江苏省农业气象重点实验室,南京210044 [2]国家气候中心,北京100081
基金项目:全球变化研究国家重大科学计划项目(2012CB955904); 国家自然科学基金项目(41205087); 大学生创新训练计划(201210300018)
摘    要:以苏玉20和郑单958为材料,采用盆栽控水试验,设置干旱、水涝和对照3个处理,研究不同水分胁迫条件对两个夏玉米品种关键生育期(拔节期和抽雄期)光合生理特性的影响。结果表明:(1)干旱和水涝均会降低夏玉米的叶片绿色度值(SPAD)、净光合速率(NPn)、蒸腾速率(Tr)和气孔导度(Gs),增加叶片胞间CO2浓度(Ci)。(2)两个夏玉米品种抽雄期对水分的敏感程度高于拔节期,且对水涝的敏感程度大于干旱。(3)两个夏玉米品种对水分逆境胁迫的抗性相比,苏玉20与郑单958的抗旱性相同,而苏玉20的抗涝性小于郑单958。研究结果可为探明不同种植区夏玉米水分抗逆性研究提供理论依据。

关 键 词:夏玉米  干旱  水涝  光合生理特性  拔节期  抽雄期

Effects of Moisture Stress on Photosynthetic Characteristics of Summer Maize Leaf during Growth Stages
TIAN Lin,XIE Xiao-jin,BAO Yun-xuan,HU Ji-chaoI,YU Li,WANG Jin-xin. Effects of Moisture Stress on Photosynthetic Characteristics of Summer Maize Leaf during Growth Stages[J]. Chinese Journal of Agrometeorology, 2013, 0(6): 655-660
Authors:TIAN Lin  XIE Xiao-jin  BAO Yun-xuan  HU Ji-chaoI  YU Li  WANG Jin-xin
Affiliation:1. Jiangsu Key Iaboratory of Agricultural Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044, China; 2. National Climate Center, Beijing 100081 )
Abstract:The morphology structure and photosynthetic characteristics of summer maize (Suyu20 and Zhengdan958) were studied during different growth stages under different water stresses (drought stress, flooding stress and control environment) in potting experiment. The results showed that soil and plant analyzer development (SPAD) value, net photosynthetic rate (NPn), transpiration rate (Tr) and conductance to H20 (Gs) decreased, and the intercellular CO2 concentration (Ci) increased under water stresses. The sensitive degrees of two summer maize cuhivars to water stresses at tasseling stage were higher than those at jointing stage, and they were further higher to flooding stress than those to drought stress. The drought resistance of Suyu20 was similar to Zhengdan958 at different growth stages, but the flooding resistance of Suyu20 was lower than Zhengdan958. The results provided a theoretical basis for maize water stress research in different regions.
Keywords:Summer maize  Drought  Flood  Photosynthetic characteristics  Jointing stage  Tasseling stage
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