Effect of Different Water and Macro-Nutrient Levels on the Chlorophyll Fluorescence Kinetic Parameters of Lespedeza davurica(Laxm.) Schindl

doi:10.11733/j.issn.1007-0435.2011.04.009

›› 2011, Vol. 19 ›› Issue (4): 591-595,606.DOI: 10.11733/j.issn.1007-0435.2011.04.009

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Effect of Different Water and Macro-Nutrient Levels on the Chlorophyll Fluorescence Kinetic Parameters of Lespedeza davurica(Laxm.) Schindl

NIU Fu-rong¹, XU Bing-cheng^1,2, DUAN Dong-ping¹, XU Wei-zhou¹

1. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi Province 712100, China;
2. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shaanxi Province 712100, China

Received:2011-02-18 Revised:2011-05-11 Online:2011-08-15 Published:2011-08-15

水肥条件对达乌里胡枝子叶绿素荧光参数的影响

牛富荣¹, 徐炳成^1,2, 段东平¹, 徐伟洲¹

1. 西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点试验室, 陕西杨凌712100;
2. 中国科学院水利部水土保持研究所, 陕西杨凌712100

通讯作者: 徐炳成,E-mail:Bcxu@ms.iswc.ac.Cn
作者简介:牛富荣(1987- ),男,甘肃秦安人,硕士研究生,研究方向为生理生态学,E-mail:niufurong1987@163.com
基金资助:
中国科学院重要方向项目(KZCX2-YW-QN412);国家自然科学基金(41071339);西北农林科技大学基本科研业务费专项(QN2009079B01)资助

Abstract

Abstract: Effects of three water levels (High Water (HW-80%FC),Moderate Water (MW-60%FC),Low Water (LW-40%FC)) and four nutrient treatments (CK,N,P,NP) on chlorophyll fluorescence parameters of Lespedeza davurica (Laxm.) Schindl was studied in a potted experiment.Results showed that under each nutrient treatment,maximum photochemical efficiency (F_v/F_m) values decreased along with soil water content,indicating the photochemical reaction efficiency of L.davurica was decreased by water stress.Under HW and MW water levels,initial fluorescence (F₀) values were significantly higher (P<0.05) while F_v/F_m values were significantly lower (P<0.05) in the N treatment than other nutrient treatments,indicating the nitrogen application could not significantly increase the activity of both PSⅡ reaction center and photochemical reaction efficiency.Active photochemical efficiency (Φ_PSⅡ),apparent electron transport rate (ETR) and photochemical quenching (qP) values in the P treatment under HW and MW were significantly higher than other three nutrient treatments,suggesting that phosphorus application improve photochemical reaction efficiency and the opening degree of reaction center.Under LW,F_v/F_m values did not have significant differences among four nutrient treatments,indicating that fertilization could not significantly increase photochemical reaction efficiency under severe water stress.

Key words: Lespedeza davurica (Laxm.) Schindl, Chlorophyll fluorescence, Water treatment, Soil nutrient

摘要： 采用盆栽控制试验,比较研究了3种水分(高水(HW-80%FC)、中水(MW-60%FC)和低水(LW-40%FC))以及4种养分(CK,N,P,NP)处理对生长旺期达乌里胡枝子(Lespedeza davurica(Laxm.)Schindl)叶绿素荧光动力学参数的影响。结果表明:不同养分处理下,随着土壤含水量的降低,达乌里胡枝子叶片F_v/F_m值降低,表明水分胁迫降低了其PSⅡ反应中心的光化学效率。HW和MW水平下,N处理的叶片F₀显著高于其他养分处理(P<0.05),而F_v/F_m值则显著低于其他养分处理(P<0.05),表明氮肥对其叶片PSⅡ反应中心的活性和光能转化效率的提高作用较小;P处理的叶片Φ_PSⅡ,ETR和qP显著高于其他养分处理(P<0.05),说明施磷提高了叶片PSⅡ反应中心光化学反应效率、开放程度和电子传递速率。LW水平下,4种养分处理间F_v/F_m值无显著差异,表明在重度水分胁迫条件下,施肥对提高叶片光化学效率无明显效果。

关键词: 达乌里胡枝子, 叶绿素荧光, 水分处理, 土壤养分

CLC Number:

NIU Fu-rong, XU Bing-cheng, DUAN Dong-ping, XU Wei-zhou. Effect of Different Water and Macro-Nutrient Levels on the Chlorophyll Fluorescence Kinetic Parameters of Lespedeza davurica(Laxm.) Schindl[J]. , 2011, 19(4): 591-595,606.

牛富荣, 徐炳成, 段东平, 徐伟洲. 水肥条件对达乌里胡枝子叶绿素荧光参数的影响[J]. , 2011, 19(4): 591-595,606.

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Effect of Different Water and Macro-Nutrient Levels on the Chlorophyll Fluorescence Kinetic Parameters of Lespedeza davurica(Laxm.) Schindl

水肥条件对达乌里胡枝子叶绿素荧光参数的影响

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