| 水氮互作对春小麦叶片气体交换和叶绿素荧光参数的作用机制 |
| 投稿时间：2007-12-14 修订日期：2008-01-10 点此下载全文 |
| 引用本文：于显枫,郭天文,张仁陟,张绪成,马一凡,赵记军.水氮互作对春小麦叶片气体交换和叶绿素荧光参数的作用机制[J].西北农业学报,2008,17(3):117~123 |
| DOI:10.7606/j.issn.1004-1389.2008.03.026 |
| 摘要点击次数: 61 |
| 全文下载次数: 82 |
| 作者 | 单位 | E-mail | | 于显枫 | 甘肃农业大学资源与环境学院, 兰州, 730070 | | | 郭天文 | 甘肃省农业科学研究院旱地农业研究所, 兰州, 730070 | guotw2007@hotmail.com | | 张仁陟 | 甘肃农业大学资源与环境学院, 兰州, 730070 | | | 张绪成 | 甘肃省农业科学研究院旱地农业研究所, 兰州, 730070
中国科学院水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室, 陕西杨凌, 712100 | | | 马一凡 | 甘肃省农业科学研究院旱地农业研究所, 兰州, 730070 | | | 赵记军 | 甘肃农业大学资源与环境学院, 兰州, 730070 | |
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| 基金项目:甘肃省中青年基金和黄土高原土壤侵蚀与旱地农业国家重点实验室开放基金(10501-174)资助 |
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| 中文摘要:通过盆栽对春小麦宁春4号不同生育期功能叶光合参数和叶绿素荧光参数的测定,研究水氮互作对春小麦叶片光合作用以及瞬时水分利用效率的影响。结果表明,施氮可提高小麦功能叶光合速率(Pn)、瞬时水分利用效率(IWUE)、气孔导度(Gs)、表观光合电子传递速率(ETR)、PSⅡ总的光化学量子产量(Yield)、荧光光化学猝灭系数(qP),同时胞间CO2浓度(Ci)减小。干旱和丰水条件下,高氮处理的Pn、IWUE、Gs和ETR均大于其他氮素水平。在拔节期和灌浆期,干旱条件下高氮叶片Yield显著低于中氮和对照处理;在抽穗期和灌浆期,丰水和中等干旱的高氮叶片qP较对照以及丰水和严重干旱的中氮叶片高。小麦叶片Pn与Yield、qP、ETR表现为显著线性正相关,而且其相关性在中等氮素水平达到最高;Pn与Gs、IWUE之间的相关性因处理不同而异,证明施氮能够显著提高光合机构开放比例、捕捉光量子的能力和电子传递速率,从而改善光合机构效能;氮素对气体交换的影响受水分条件的显著作用,从而影响叶片水分利用效率,但由于干旱导致Pn和IWUE的降低可以通过增施氮肥得到部分补偿。 |
| 中文关键词:水氮互作 光合作用 叶绿素荧光参数 瞬时水分利用效率 春小麦 |
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| Effects of Water and Nitrogen Interacting on Gas Exchange and Chlorophyll Fluorescence Parameters of Spring Wheat |
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| Abstract:Effect of nitrogen and water application on photosynthesis and instantaneous water use efficiency of spring wheat leaf had been studied by measuring the photosynthetic and chlorophyll fluorescence parameters in different growth stages of spring wheat in this potted experiment.The results indicated that nitrogen application could enhance the foliar photosynthetic rate(Pn),instantaneous water use efficiency(IWUE),st2(Ci).Under drought and well water conditions, the Pn, IWUE, Gs and ETR of high-nitrogen leaf was higher than the other nitrogen level.During Jointing and Ripening periods, the total PS llphoto Yield of high-nitrogen leaf which under drought condition were lower than the midcR e-nitrogen leaf and controls; During H ending and Ripening periods, the dP of high nitrogen leaf that under middle middle-dry and well water conditiomvere higher than middle-nitrogen leaf in wet and driest treatments.Correlation analysis shwved that there were a significantly linear positive relationship between Pn and Yield、dP、ETR, and reach highest point on the middle nitrogen level; The relationship between Pn and Gs, IWUE were different in did ferent treatments, the results indicated that nitrogen application could improve the opening proportion of photosynthetic instruments, photos catching ability and electronic transport rate, and then amen ded the efficiency of photosynthetic instruments; The effects of nitrogen application on gas exchange were different under different moisture condition, and then affected the water use efficiency,but the reduction of Pn and IWUE caused by drought could be compensated by supplying nitrogen fertilizer. |
| keywords:Interaction of water and nitrogen Photosynthesis Chlorophyll fluorescence IWUE Spring wheat |
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