冀西山区不同玉米品种苗期光合特性研究  

Study on Photosynthetic Characteristics of the Seedling Stage of Different Maize Hybrids in West Mountainous Regions of Hebei Province

作　　者：冯伟[1] 杨军芳[1] 周晓芬[1] 焦永刚[2] 杜晓东[3] 

机构地区：[1]河北省农林科学院农业资源环境研究所,河北石家庄050051 [2]河北省农林科学院经济作物研究所,河北石家庄050051 [3]河北省农林科学院农业信息与经济研究所,河北石家庄050051

出　　处：《华北农学报》2012年第B12期122-126,共5页Acta Agriculturae Boreali-Sinica

基　　金：河北省科技厅项目(11231005D-1)

摘　　要：在冀西山区旱作玉米区选取6个品种研究玉米苗期的光合特性,分别测定了叶绿素含量、净光合速率(Pn)、光强-光合响应曲线(Pn-PAR)、蒸腾速率(Tr)、气孔导度(Gs)、胞间CO2浓度(Ci)和作物水分利用率(WUE)等指标,结果表明,不同品种苗期叶片叶绿素含量分为2组,叶绿素含量较高的品种为邢抗2号、承玉5号、泰玉2号、鲁单981,含量较低的品种为浚单20、郑单958。其中,组内品种叶绿素含量差异不显著,组间品种叶绿素含量差异达显著水平。在(2 526±23)μmol的自然光范围内,承玉5号的Pn分别比浚单20和郑单958高8.5%和8.4%,但不同品种间Pn差异不显著。不同品种的Pn、Tr、Gs和WUE随光量子通量密度(PPFD)的增加呈交错递增趋势,彼此间呈正相关关系。不同品种的Ci随PPFD的增加呈交错下降趋势。当PPFD为2 317μmol/(m.2s)时,各品种的Pn、Tr、Gs、Ci和WUE的排列顺序不完全一致。Photosynthetic test of the seedling stage of maize selected six different maize varieties studied in west mountainous regions of Hebei Province.The paper explored their relationships by measuring the chlorophyll content,net photosynthetic rate（Pn）,response curve of light intensity and photosynthesis（Pn-PAR）,transpiration rate（Tr）,stomatal conductance（Gs）,intercellular CO2 concentration（Ci） and crop water use efficiency（WUE）.The results showed that the chlorophyll contents of seeding leaf of the different varieties were divided into two groups.One group that the chlorophyll contents of the varieties were higher was Xingkang 2,Chengyu 5,Taiyu 2 and Ludan 981,the other was Jundan 20 and Zhengdan 958.The chlorophyll contents in group were not significant,and the chlorophyll contents between groups were a significant level.When natural light range was（2 526±23）μmol/（m2 · s）,Pn of Chengyu 5 is 8.5% and 8.4% higher than that of Jundan 20 and Zhengdan 958 respectively,but Pn differences did not significant between different species.With photosynthetic photon flux density（PPFD） increased,Pn,Tr,Gs and WUE of different maize varieties were the alternate increasing trend,and they were a positive relationship between each other.Ci of different maize varieties were the alternate downward trend with PPFD increased.When PPFD was 2 317 μmol/（m2 · s）,Pn,Tr,Gs,Ci and WUE of different maize varieties does not completely consistent.

关 键 词：山区 旱地玉米 苗期 光和特性 

分 类 号：S513.01[农业科学—作物学]