| 不同水肥条件下白羊草光合生理生态特征研究Ⅱ.光响应曲线 |
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| 引用本文： | 徐伟洲,徐炳成,段东平,牛富荣.不同水肥条件下白羊草光合生理生态特征研究Ⅱ.光响应曲线[J].草地学报,2010,18(6):773-779. |
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| 作者姓名： | 徐伟洲 徐炳成 段东平 牛富荣 |
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| 作者单位： | 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实验室,陕西,杨凌,712100;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实验室,陕西,杨凌,712100;中国科学院水利部水土保持研究所,陕西,杨凌,712100 |
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| 基金项目： | 中国科学院重要方向项目(KZCX2-YW-QN412); 西北农林科技大学基本科研业务费专项(QN2009079B01); 教育部留学回国人员科研启动基金资助 |
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| 摘 要： | 为揭示黄土丘陵区乡土草种白羊草(Bothriochloaischaemum(L.) Keng.)在不同水肥供应条件下的光合生理特征,本研究采用盆栽控制实验,比较研究了白羊草在2种水分水平(HW-80%FC和LW-40FC%)和3种养分(CK,P和NP)处理下的光合光响应曲线特征。结果表明:非直角双曲线模型能很好的拟合白羊草光响应曲线。充分供水条件下(HW),土壤NP营养提高了白羊草最大净光合速率(P′max),降低了暗呼吸消耗(Rd)并且保持较低的光合补偿点(LCP)和较高的光饱和点(LSP),表明NP营养有利于提高白羊草对光照的广幅适应能力和光合潜力。水分胁迫条件下(LW),P处理显著提高了白羊草P′max,其表观量子效率(a)和LCP也相对较高,表明施磷将有利于提高干旱条件下白羊草的光合能力。
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| 关 键 词： | 白羊草 光响应曲线 氮磷 水分胁迫 |
Study on the Photosynthetic Characteristics of Bothriochloa ischaemum under Different Water and Nutrient Conditions Ⅱ. Light-Response Curve |
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| XU Wei-zhou,XU Bing-cheng,DUAN Dong-ping,NIU Fu-rong.Study on the Photosynthetic Characteristics of Bothriochloa ischaemum under Different Water and Nutrient Conditions Ⅱ. Light-Response Curve[J].Acta Agrestia Sinica,2010,18(6):773-779. |
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| Authors: | XU Wei-zhou XU Bing-cheng DUAN Dong-ping NIU Fu-rong |
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| Institution: | XU Wei-zhou1,XU Bing-cheng1,2,DUAN Dong-ping1,NIU Fu-rong1(1.State Key Laboratory of Soil Erosion , Dryl, Farming on the Loess Plateau,Northwest A&F University,Yangling,Shaanxi Province 712100,China,2.Institute of Soil , Water Conservation,Chinese Academy of Sciences , Ministry of Water Resources,China) |
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| Abstract: | In order to study the photo-physiological characteristics of old world bluestem(Bothriochloa ischaemum L.Keng.) from loess hilly-gully region under different water and nutrient supplies,the photosynthesis-light response curves(Pn-PAR)were determined under potted conditions with two water treatments(HW-80%FC and LW-40%FC)and three nutrient treatments(CK,P and NP).Results indicte that the photosynthesis-light response curves of old world bluestem was more appropriate to a non-rectangular hyperbolic model.NP t... |
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| Keywords: | Bothriochloa ischaemum Photosynthesis-light response curve Nitrogen and phosphorus Water stress |
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