首页|高寒区玉米叶片光合参数日变化及其与环境因子关系

高寒区玉米叶片光合参数日变化及其与环境因子关系

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为探明高寒区玉米叶片光合相关参数日变化特性，以"隆平702"玉米品种为材料，在安图县松江镇南道村进行田间试验，利用Li-6400光合仪在抽雄吐丝期测定叶片净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)、胞间CO2浓度(Ci)以及当天的光合有效辐射(R4R)、空气温度(T)和空气相对湿度(RH)，分析叶片光合相关参数日变化及其与环境因子的关系。结果表明:高寒区玉米叶片Pn与Tr的日变化均为双峰曲线变化，Pn的峰值分别出现在10:00和14:00;T的峰值分别出现在10:00和13:00;Gs的最大值出现在10:00，随后呈下降趋势;Ci呈先下降后上升的趋势;06:00-10:00，Pn与PAR，T，RH分别呈极显著正相关、显著正相关、极显著负相关(r=0。927，r=0。574，r=-0。765);14:00-18:00，Pn与 PAR，T，RH的相关性分别为 r=0。921，r=0。553，r=-0。712;06:00-10:00 时，Gs与 PAR极显著正相关(r=0。772)，与RH呈显著负相关(r=-0。550);10:00-14:00，Gs与PAR呈显著正相关(r=0。545)，与RH呈正相关(r=0。482);06:00-10:00，Tr与PAR呈极显著正相关(r=0。953)，与RH均呈极显著负相关(r=-0。857);06:00-10:00，Ci与PAR呈极显著负相关(r=-0。655)。可见，空气温度和光合有效辐射偏低、空气相对湿度偏高是限制该高寒区域玉米光合物质生产的主要因子。
Relationship Between Diurnal Changes of Net Photosynthetic Rate and Environmental Factors in Leaves of Maize in Alpine Cold Re-gion
The characteristics of photosynthetic parameters of maize leaves in alpine region were in-vestigated.Field experiments were carried out in Nandao village,Songjiang town,Antu county,using Longping 702 maize varieties as materials,net photosynthetic rate(Pn),stomatal conductance(Gs),transpiration rate(Tr),intercellular CO2 concentration(Ci),photosynthetically active radiation(PAR),air temperature(T),and air relative humidity(RH)of maize leaves were determined using a Li-6400 photosynthetic apparatus during the extraction and male-spraying period.The relationship between photosynthetic parameters and environmental factors was analyzed.The results showed that:the changes of leaf Pn and Tr of maize in alpine region were double peak curve,the peak of Pn appeared at 10:00 and 14:00,respectively.Tr peaks were around 10:00 and 13:00,respectively.Gs maximum reached at 10:00,followed by a downward trend.Ci decreased first and then increased.At 6:00-10:00,Pn showed an extremely significantly positive correlation,a significantly positive correlation,and an extremely significantly negative correlation with PAR,T,and RH,respectively(r=0.927,r=0.574,r=-0.765);At 14:00-18:00,the correlation between Pn and PAR,T,and RH was r=0.921,r=0.553,r=-0.712,respectively;At 06:00-10:00,Gs showed an extremely significantly positive cor-relation with PAR(r=0.772)and a significantlt negative correlation with RH(r=-0.550);At 10:00-14:00,Gs showed a significantly positive correlation with PAR(r=0.545)and a positive correlation with RH(r=0.482);At 06:00-10:00,Tr showed an extremely significantly positive correlation with PAR(r=0.953),and an extremely significantly negative correlation with RH(r=-0.857).At 06:00-10:00,Ci showed an extremely significantly negative correlation with PAR(r=-0.655).The results showed that low air temperature and photosynthetically active radiation and high air relative humid-ity are the main factors limiting the production of photosynthetic materials in maize.

maizephotosynthetic parameterdiurnal changeenvironmental factoralpine cold region

历艳璐、王俊鹏、于欣志、魏宏磊、赵洪祥、边少锋、张治安

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吉林农业大学农学院,长春 130118

吉林省农业科学院,长春 130124

玉米 光合参数 日变化 环境因子 高寒区

国家重点研发计划

2018YFD0300205

2024

10.13327/j.jjlau.2020.5811

吉林农业大学学报
吉林农业大学

吉林农业大学学报

CSTPCD北大核心
影响因子：1.014
ISSN：1000-5684
年,卷(期)：2024.46(2)
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