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当前位置: 首页 > 文章 > 不同氮素水平对营养生长期南荻植株光合特性的影响 作物研究 2012,26 (3) 255-259
Position: Home > Articles > Effects of Different Nitrogen Rates on Photosynthetic Characteristics in Vegetative Period of Triarrhena LutarioripariaL.Liu Crop Research 2012,26 (3) 255-259

不同氮素水平对营养生长期南荻植株光合特性的影响

作  者：
邹振华;党宁;王惠群;张闯;李合松
单  位：
湖南农业大学生物科学技术学院/植物激素与生长发育湖南省重点实验室
关键词：
南荻;光响应曲线;氮素;光合参数;生物量
摘  要：
为揭示南荻(Triarrhena lutarioriparia L.Liu)在不同氮素水平下的光合生理特性,本研究采用盆栽试验,比较了四倍体南荻在5种不同施氮水平处理下光合作用参数之间的差异。结果表明,在0～4 g/株氮素水平范围内,随着施氮量的增加,各处理净光合速率(Pn)、叶绿素含量随之增加。净光合速率较高的处理其植株的气孔导度(Gs)、蒸腾速率(Tr)也较高,而胞间二氧化碳浓度(Ci)较低。在施氮水平为4 g/株时,南荻叶片净光合速率和叶绿素含量达最大值,分别为24.47μmol/m2.s和3.64 mg/g。叶绿素含量与净光合速率呈显著正相关(r=0.892*)。不同施氮水平南荻植株光响应曲线不同,施氮可提高南荻暗呼吸速率(Rd)和光补偿点(LCP);在施氮为2 g/株和4 g/株处理时有较高的表观量子效率(AQY);在2～4 g/株氮素水平范围内,植株最大净光合速率较大。
译  名：
Effects of Different Nitrogen Rates on Photosynthetic Characteristics in Vegetative Period of Triarrhena LutarioripariaL.Liu
作  者：
ZOU Zhen-hua,DANG Ning,WANG Hui-qun,ZHANG Chuang,LI He-Song*(College of Bioscience and Biotechnology/Hunan Provincial Key Laboratory of Phytohormones and Growth Development,Hunan Agricultural University,Changsha,Hunan 410128,China)
关键词：
Triarrhena Lutarioriparia L.Liu;Light response curve;Nitrogen;Photosynthetic parameters;Biomass
摘  要：
In order to study the photosynthetic characteristics of Triarrhena Lutarioriparia L.Liu under different nitrogen rates,the difference in photosynthetic parameters was compared by pot experiment with 5 nitrogen rate treatments.Results indicated that Pn(net photosynthetic rate) and the chlorophyll content were increased in nitrogen rate range of 0~4 g/plant.Higher Gs(stomatal conductance) and Tr(transpiration rate) appeared simultaneously with higher Pn,while Ci(intercellular CO2 concentration) showed contrary.Pn and the chlorophyll content were the highest(24.47 μmol/m2·s and 3.6445 mg/g) at level of 4 g/plant nitrogen application.Significant positive correlation existed between chlorophyll content and net photosynthetic rate(r=0.892*).The light-response curves were different under different nitrogen application rates.Rd(apparent dark respiration rate) and LCP(light compensation point) were increased after the nitrogen application.AQY(apparent quantum yield) was higher at the level of 2 g/plant and 4 g/plant nitrogen application.Pn increased in the range of 2~4 g/plant nitrogen application.

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