北京西山侧柏林冠层不同高度处叶片水分利用效率
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摘要
以北京西山广泛分布的侧柏林为研究对象,综合考虑冠层不同高度处气象因子、大气CO_2浓度以及大气CO_2中碳同位素组成的差异,对其冠层不同高度处叶片的瞬时水分利用效率和短期水分利用效率分别进行了测定,以期为区域森林生态系统固碳与耗水研究提供理论依据,为区域森林生态系统经营与维护提供技术支撑.结果表明:侧柏林冠层不同高度处叶片的瞬时水分利用效率随冠层高度的变化规律表现为上层>中层>下层,多种气象因子协同影响气孔运动,使瞬时水分利用效率受气孔限制;侧柏林冠层不同高度处的环境因子、大气CO_2浓度以及大气CO_2的δ~(13)C均存在一定差异,导致了林冠各层叶片的短期水分利用效率的变化.林冠上层叶片通过提高水分利用效率适应环境.
In this study,we focused on Platycladus orientalis,a widely distributed tree species in Beijing western mountains area,and precisely determined its foliar water use efficiency( including instantaneous water use efficiency derived from gas exchange and short-term water use efficiency obtained on carbon isotope model) by carefully considering the discrepancies of meteorological factors and atmosphere CO_2 concentration and δ~(13)C among different canopy heights,hoping to provide theoretical basis for carbon sequestration and water loss in regional forest ecosystem,and offer technical support for regional forest management and maintenance. The results showed that the foliar instantaneous water use efficiency tended to increase with the increasing canopy height,following the order of the upper canopy > the middle canopy > the lower canopy. A variety of meteorological factors synergistically influenced stomatal movement,and stomatal conductance would in turn have an effect on foliar instantaneous water use efficiency. Foliar short-term water use efficiency also increased with increasing canopy height,following the order of the upper canopy > the middle canopy > the lower canopy. The differences of foliar short-term water use efficiency among different heights could be explained by discrepancies of environmental drivers and atmosphere CO_2 concentration and δ~(13)C.Platycladus orientalis leaves in upper canopy adapted to ambient condition by improving water use efficiency.
In this study,we focused on Platycladus orientalis,a widely distributed tree species in Beijing western mountains area,and precisely determined its foliar water use efficiency( including instantaneous water use efficiency derived from gas exchange and short-term water use efficiency obtained on carbon isotope model) by carefully considering the discrepancies of meteorological factors and atmosphere CO_2 concentration and δ~(13)C among different canopy heights,hoping to provide theoretical basis for carbon sequestration and water loss in regional forest ecosystem,and offer technical support for regional forest management and maintenance. The results showed that the foliar instantaneous water use efficiency tended to increase with the increasing canopy height,following the order of the upper canopy > the middle canopy > the lower canopy. A variety of meteorological factors synergistically influenced stomatal movement,and stomatal conductance would in turn have an effect on foliar instantaneous water use efficiency. Foliar short-term water use efficiency also increased with increasing canopy height,following the order of the upper canopy > the middle canopy > the lower canopy. The differences of foliar short-term water use efficiency among different heights could be explained by discrepancies of environmental drivers and atmosphere CO_2 concentration and δ~(13)C.Platycladus orientalis leaves in upper canopy adapted to ambient condition by improving water use efficiency.
引文
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[18]Egea G,Verhoef A,Vidale PL.Towards an improved and more flexible representation of water stress in coupled photosynthesis-stomatal conductance models.Agricultural and Forest Meteorology,2011,151:1370-1384
[19]Yu GR,Zhuang J,Yu ZL.An attempt to establish a synthetic model of photosynthesis-transpiration based on stomatal behavior for maize and soybean plants grown in field.Journal of Plant Physiology,2001,158:861-874
[20]Zhang M-L(张慕黎),Wang J-X(王进鑫),Li J-W(李继文),et al.Characteristics of photosynthesis and water use efficiency of Robinia pseudoacacia and Platycladus orientalis seedlings under sufficient soil moisture.Journal of Northwest Forestry University(西北林学院学报),2009,24(3):27-32(in Chinese)
[21]Yin W-L(尹伟伦),Wan X-Q(万雪琴),Xia X-L(夏新莉).Relations between stable carbon isotope discrimination and water use efficiency as well as growth for poplar.Scientia Silvae Sinicae(林业科学),2007,43(8):15-22(in Chinese)
[22]Niinemets U,Sonninen E,Tobias M.Canopy gradients in leaf intercellular CO2mole fractions revisited:Interactions between leaf irradiance and water stress need consideration.Plant,Cell&Environment,2004,27:569-583
[23]Cao S-K(曹生奎),Feng Q(冯起),Si J-H(司建华),et al.Changes of stable carbon isotope and water use efficiency of Euphrates poplar leaves under different site conditions.Journal of Glaciology and Geocryology(冰川冻土),2012,34(1):155-160(in Chinese)
[24]Fang X-J(方晓娟),Li J-Y(李吉跃),Nie L-S(聂立水),et al.Stable carbon isotope characteristics and water use efficiency of hybrid clones of white poplar.Ecology and Environmental Sciences(生态环境学报),2009,18(6):2267-2271(in Chinese)
[25]Liu H-Y(刘海燕),Li J-Y(李吉跃),Zhao Y(赵燕),et al.Characteristics of stable carbon isotope and water use efficiency of Salix.Arid Zone Research(干旱区研究),2008,25(4):514-518(in Chinese)
[26]Zhan X-Y(展小云),Yu G-R(于贵瑞),Sheng W-P(盛文萍),et al.Foliar water use efficiency and nitrogen use efficiency of dominant plant species in main forest along the North-South Transect of East China.Chinese Journal of Applied Ecology(应用生态学报),2012,23(3):587-594(in Chinese)
[27]Yu Q-W(王庆伟),Qi L(齐麟),Tian J(田杰),et al.Effects of altitudinal gradient on water use efficiency of Betula ermanii on the northern slope of Changbai Mountains,Northeast China.Chinese Journal of Applied Ecology(应用生态学报),2011,22(9):2227-2232(in Chinese)
[28]Cao S-K(曹生奎),Feng Q(冯起),Si J-H(司建华),et al.Summary on the plant water use efficiency at leaf level.Acta Ecologica Sinica(生态学报),2009,29(7):3882-3892(in Chinese)
[2]Li J-M(李机密),Huang R-Z(黄儒珠),Wang J(王健),et al.Water use efficiency of terrestrial plants.Chinese Journal of Ecology(生态学杂志),2009,28(8):1655-1663(in Chinese)
[3]Li S-F(孙双峰),Huang J-H(黄建辉),Lin G-H(林光辉),et al.Application of stable isotope technique in the study of plant water use.Acta Ecologica Sinica(生态学报),2005,25(9):2362-2371(in Chinese)
[4]Wu J-E(吴骏恩),Liu W-J(刘文杰),Zhu C-J(朱春景).Application of stable isotope techniques in the study of plant water sources and use efficiency.Journal of Southwest Forestry University(西南林业大学学报),2014,34(5):103-110(in Chinese)
[5]Zhang W-Q(张卫强),He K-N(贺康宁),Tian J-H(田晶会),et al.Characteristics of photosynthesis and water use efficiency of Platycladus orientalis under different soil moisture.Research of Soil and Water Conservation(水土保持研究),2006,13(6):44-47(in Chinese)
[6]Hu J,Moore DJP,Riverosiregui DA,et al.Modeling whole-tree carbon assimilation rate using observed transpiration rates and needle sugar carbon isotope ratios.New Phytologist,2010,185:1000-1015
[7]He Y-B(何雅冰).Research about Water Use Efficiency of the Typical Tree in Beijing under Different CO2Concentration.Master Thesis.Beijing:Beijing Forestry University,2016(in Chinese)
[8]Yang Z-G(杨芝歌).Study on Water Coupled Carbon of Typical Forest Vegetation Canopy in Beijing Mountainous Area.Master Thesis.Beijing:Beijing Forestry University,2013(in Chinese)
[9]Wang Q-W(王庆伟),Yu D-P(于大炮),Dai L-M(代力民),et al.Research progress in water use efficiency of plants under global climate change.Chinese Journal of Applied Ecology(应用生态学报),2010,21(12):3255-3265(in Chinese)
[10]Luo Y-Y(罗亚勇),Zhao X-Y(赵学勇),Huang Y-X(黄迎新),et al.Research progress in plants water use efficiency and its measuring method.Journal of Desert Research(中国沙漠),2009,29(4):648-655(in Chinese)
[11]Bogelein R,Hassdenteufel M,Thomas FM,et al.Comparison of leaf gas exchange and stable isotope signature of water-soluble compounds along canopy gradients of co-occurring Douglas-fir and European beech.Plant,Cell&Environment,2012,35:1245-1257
[12]Yu X-X(余新晓),Yang Z-G(杨芝歌),Bai Y-J(白艳婧),et al.Water use efficiency of typical tree species in Beijing mountain area based on!13C.Journal of Basic Science and Engineering(应用基础与工程科学学报),2013,21(4):593-599(in Chinese)
[13]Wang J-L(王建林),Yu G-R(于贵瑞),Fang Q-X(房全孝),et al.Responses of water use efficiency of nine plant species to light and CO2and its modeling.Acta Ecologica Sinica(生态学报),2008,28(2):525-533(in Chinese)
[14]Chen P(陈平),Zhang J-S(张劲松),Meng P(孟平),et al.Feasibility analysis on the determination of WUE by stable carbon isotope:Cassia obtusifolia L.as an example.Acta Ecologica Sinica(生态学报),2014,34(19):5453-5459(in Chinese)
[15]Sun SJ,Meng P,Zhang JS,et al.Partitioning oak woodland evapotranspiration in the rocky mountainous area of North China was disturbed by foreign vapor,as estimated based on non-steady-state18O isotopic composition.Agricultural and Forest Meteorology,2014,184:36-47
[16]Zhang W-Q(张卫强),He K-N(贺康宁),Wang Z-N(王正宁),et al.Effects of light radiation intensity on photosynthetic characteristics and water use efficiency to seedlings of Platycladus orientalis and Pinus tabulaeformis.Science of Soil and Water Conservation(中国水土保持科学),2006,4(2):108-113(in Chinese)
[17]Yang X-B(杨新兵).Study on the Rules of Water Consumption of Dominant Tree Species and the Community of Artificial Forest in Mountain Area of Northern China.Ph D Thesis.Beijing:Beijing Forestry University,2007(in Chinese)
[18]Egea G,Verhoef A,Vidale PL.Towards an improved and more flexible representation of water stress in coupled photosynthesis-stomatal conductance models.Agricultural and Forest Meteorology,2011,151:1370-1384
[19]Yu GR,Zhuang J,Yu ZL.An attempt to establish a synthetic model of photosynthesis-transpiration based on stomatal behavior for maize and soybean plants grown in field.Journal of Plant Physiology,2001,158:861-874
[20]Zhang M-L(张慕黎),Wang J-X(王进鑫),Li J-W(李继文),et al.Characteristics of photosynthesis and water use efficiency of Robinia pseudoacacia and Platycladus orientalis seedlings under sufficient soil moisture.Journal of Northwest Forestry University(西北林学院学报),2009,24(3):27-32(in Chinese)
[21]Yin W-L(尹伟伦),Wan X-Q(万雪琴),Xia X-L(夏新莉).Relations between stable carbon isotope discrimination and water use efficiency as well as growth for poplar.Scientia Silvae Sinicae(林业科学),2007,43(8):15-22(in Chinese)
[22]Niinemets U,Sonninen E,Tobias M.Canopy gradients in leaf intercellular CO2mole fractions revisited:Interactions between leaf irradiance and water stress need consideration.Plant,Cell&Environment,2004,27:569-583
[23]Cao S-K(曹生奎),Feng Q(冯起),Si J-H(司建华),et al.Changes of stable carbon isotope and water use efficiency of Euphrates poplar leaves under different site conditions.Journal of Glaciology and Geocryology(冰川冻土),2012,34(1):155-160(in Chinese)
[24]Fang X-J(方晓娟),Li J-Y(李吉跃),Nie L-S(聂立水),et al.Stable carbon isotope characteristics and water use efficiency of hybrid clones of white poplar.Ecology and Environmental Sciences(生态环境学报),2009,18(6):2267-2271(in Chinese)
[25]Liu H-Y(刘海燕),Li J-Y(李吉跃),Zhao Y(赵燕),et al.Characteristics of stable carbon isotope and water use efficiency of Salix.Arid Zone Research(干旱区研究),2008,25(4):514-518(in Chinese)
[26]Zhan X-Y(展小云),Yu G-R(于贵瑞),Sheng W-P(盛文萍),et al.Foliar water use efficiency and nitrogen use efficiency of dominant plant species in main forest along the North-South Transect of East China.Chinese Journal of Applied Ecology(应用生态学报),2012,23(3):587-594(in Chinese)
[27]Yu Q-W(王庆伟),Qi L(齐麟),Tian J(田杰),et al.Effects of altitudinal gradient on water use efficiency of Betula ermanii on the northern slope of Changbai Mountains,Northeast China.Chinese Journal of Applied Ecology(应用生态学报),2011,22(9):2227-2232(in Chinese)
[28]Cao S-K(曹生奎),Feng Q(冯起),Si J-H(司建华),et al.Summary on the plant water use efficiency at leaf level.Acta Ecologica Sinica(生态学报),2009,29(7):3882-3892(in Chinese)
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