| 不同氮素水平下玉米水分利用率与光合特性的关系 |
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| 引用本文： | 张兆沛,王文静,崔琳霞,王志伟,张建伟,牛立元. 不同氮素水平下玉米水分利用率与光合特性的关系[J]. 贵州农业科学, 2009, 37(3) |
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| 作者姓名： | 张兆沛 王文静 崔琳霞 王志伟 张建伟 牛立元 |
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| 作者单位： | 河南科技学院,河南,新乡453003;商丘师范学院,河南,商丘476000;山西运城农业职业技术学院,山西,运城,044000 |
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| 摘 要： | 在拔节、吐丝、灌浆不同生育阶段,通过用LI-6400便携式光合仪对不同N水平下玉米叶片的光合参数和环境因子进行测定,研究了水分利用率(WUE)分别与光合速率(Pn)、蒸腾速率(Tr)、气孔导度(Gs)、胞间CO2浓度(Ci)的关系.结果表明,在不同时期,NH处理下的WUE均比NL处理下的高.NH、NL处理下,WUE随Pn、Gs的升高而增加,当Pn、Gs分别超过23、22 μmolCO2/(m2·s)和0.20、0.18 mol/(m2·s)时,WUE下降;而当Tr小于3.00 mmolH2O/(m2·s)时,2个N水平下的WUE均随Tr的升高而增加,当Tr超过此范围,2个N处理下的WUE均下降.
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| 关 键 词： | 玉米 氮素 水分利用率 光合特性 |
The Relation between Water Use Efficiency and Photosynthesis Characteristic under Different N Level |
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| ZHANG Zhao-pei,WANG Wen-jing,CUI Lin-xia,WANG Zhi-wei,ZHANG Jian-wei,NIU Li-yuan. The Relation between Water Use Efficiency and Photosynthesis Characteristic under Different N Level[J]. Guizhou Agricultural Sciences, 2009, 37(3) |
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| Authors: | ZHANG Zhao-pei WANG Wen-jing CUI Lin-xia WANG Zhi-wei ZHANG Jian-wei NIU Li-yuan |
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| Affiliation: | 1.Henan Institute of Science and Technology;Xinxiang;Henan 453003;2.Shangqiu Normal University;Shangqiu;Henan 476000;3.Yuncheng Agricultural Vocational School;Yuncheng;Shanxi 044000;China |
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| Abstract: | The photosynthesis parameter and environment factors of maize leaves were determined by LI-6400 portal photosyntometer at jointing,silk and filling stage under different N level to study the relation between water use efficiency and photosynthesis rate,transpiration rate,stomatal conductance,stomatal conductance,intercellular CO2intensity.The results showed that the water use efficiency under high N level was higher than that under low N level at different growth stage,the water use efficiency increased wit... |
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| Keywords: | maize N nutrient water use efficiency photosynthesis characteristic |
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