| 施氮量对麻疯树幼苗生长及叶片光合特性的影响 |
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| 引用本文： | 尹丽,胡庭兴,刘永安,谢财永,冯毅,颜震,李银华,王永杰. 施氮量对麻疯树幼苗生长及叶片光合特性的影响[J]. 生态学报, 2011, 31(17): 4977-4984 |
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| 作者姓名： | 尹丽 胡庭兴 刘永安 谢财永 冯毅 颜震 李银华 王永杰 |
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| 作者单位： | 1. 四川农业大学林学院,四川省林业生态工程重点实验室,雅安625014
2. 四川省凉山州林业科学研究所,西昌,615021 |
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| 基金项目： | 中日技术合作四川省示范林营造项目(JICA); 四川农业大学2008年国家级大学生创新性实验计划项目(2008-17); 四川农业大学优秀硕士学位论文培育基金资助 |
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| 摘 要： | 采用盆栽土培的方法,研究了不同施氮量(对照N0 0 kg N/hm2、低氮NL 96 kg N/hm2、中氮NM 288 kg N/hm2、高氮NH 480 kg N/hm2)对麻疯树幼苗生长、叶片气体交换及叶绿素荧光参数的影响。结果表明,麻疯树幼苗叶片氮含量、可溶性蛋白含量、株高、地径、叶片数量、叶面积、根长、各组分生物量、叶片净光合速率(Pn)、气孔导度(Gs)、蒸腾速率(Tr)和水分利用效率(WUE)均随施氮量的增加先升高后降低,NM处理下麻疯树幼苗长势最好,各气体交换参数值最高;施氮对麻疯树地上部分的促进作用远大于地下部分,施氮后根冠比显著降低;此外,麻疯树叶绿素含量、PSⅡ最大光化学量子产量(Fv/Fm)、PSⅡ有效量子产量(F'v/F'm)、PSⅡ实际光化学效率(ΦPSⅡ)、电子传递速率(ETR)和光化学淬灭系数(qP)均随施氮量的增加而升高,非光化学淬灭系数(NPQ)随施氮量增加而降低。适量施氮可通过增强叶绿体光化学活性、气孔导度和羧化能力而提高麻疯树幼苗的光合能力,促进生长;过高施氮对麻疯树幼苗光合与生长的促进效应降低。试验条件下,当年生麻疯树幼苗的最适施氮量为288 kg N/hm2。
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| 关 键 词： | 施氮 麻疯树 生长 气体交换参数 叶绿素荧光参数 |
| 收稿时间： | 2010-07-27 |
| 修稿时间： | 2010-11-29 |
Effect of nitrogen application rate on growth and leaf photosynthetic characteristics of Jatropha curcas L. seedlings |
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| YIN Li,HU Tingxing,LIU Yongan,XIE Caiyong,FENG Yi,YAN Zhen,LI Yinhua and WANG Yongjie. Effect of nitrogen application rate on growth and leaf photosynthetic characteristics of Jatropha curcas L. seedlings[J]. Acta Ecologica Sinica, 2011, 31(17): 4977-4984 |
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| Authors: | YIN Li HU Tingxing LIU Yongan XIE Caiyong FENG Yi YAN Zhen LI Yinhua WANG Yongjie |
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| Affiliation: | College of Forestry, Sichuan Agricultural University, Sichuan Provincial Key Laboratory of Forestry Ecological Engineering, Ya'an 625014, China;College of Forestry, Sichuan Agricultural University, Sichuan Provincial Key Laboratory of Forestry Ecological Engineering, Ya'an 625014, China;Forestry Research Institute of Liangshan Prefecture, Xichang 615021, China;College of Forestry, Sichuan Agricultural University, Sichuan Provincial Key Laboratory of Forestry Ecological Engineering, Ya'an 625014, China;College of Forestry, Sichuan Agricultural University, Sichuan Provincial Key Laboratory of Forestry Ecological Engineering, Ya'an 625014, China;College of Forestry, Sichuan Agricultural University, Sichuan Provincial Key Laboratory of Forestry Ecological Engineering, Ya'an 625014, China;College of Forestry, Sichuan Agricultural University, Sichuan Provincial Key Laboratory of Forestry Ecological Engineering, Ya'an 625014, China;College of Forestry, Sichuan Agricultural University, Sichuan Provincial Key Laboratory of Forestry Ecological Engineering, Ya'an 625014, China |
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| Abstract: | Nitrogen(N) is an important component of chlorophyll,protein,nucleic acid,and some hormones in plant,it also controls the growth and development of plant in many ecosystems.N availability has been recognized as a key constraint to plant growth.The N demand of plant and corresponding N application availability is becoming the research focus of plant nutritionists and physiologists.Jatropha curcas L.is an potential woody oil species which wildly distributed in south China.However,the effects of nitrogen suppl... |
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| Keywords: | nitrogen Jatropha curcas growth gas exchange parameter chlorophyll fluorescence parameter |
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