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施氮量对麻疯树幼苗生长及叶片光合特性的影响
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.
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
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
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
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(ΦPS)、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

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:2010/7/27 0:00:00
修稿时间:2010/11/29 0:00:00

Effect of nitrogen application rate on growth and leaf photosynthetic characteristics of Jatropha curcas L. seedlings
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.
Authors:YIN Li  HU Tingxing  LIU Yongan  XIE Caiyong  FENG Yi  YAN Zhen  LI Yinhua and WANG Yongjie
Institution: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
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...
Keywords:nitrogen  Jatropha curcas  growth  gas exchange parameter  chlorophyll fluorescence parameter
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