多重情景下半干旱地区人工杨树林光合生理特征
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摘要
深刻剖析多重情景下主要防风固沙树种的光合生理特征,对半干旱地区生态系统的健康维持与恢复重建具有重要的指导意义。以半干旱典型区科尔沁沙地人工杨树为研究对象,采用Li-6400红外气体分析仪活体测量生长季不同月份、嫩叶与成熟叶、上午与下午以及不同CO2浓度和光强下杨树叶片的光响应和CO2响应曲线,进一步对比分析这些情景下净光合速率(Pn)、蒸腾速率(Tr)和水分利用率(WUE)的差异性。结果表明:在相同光强和CO2浓度下,生长旺盛期杨树叶片的Pn高于生长初期和生长末期;嫩叶与成熟叶的Pn、Tr、WUE差异明显,嫩叶的蒸腾作用相对较强,成熟叶的光合作用相对较强。研究结果对开展半干旱地区人工杨树光合生理相关研究具有一定的参考价值。
Fully analyzing the photosynthetic physiological characteristics of the main sand-fixing species in multiple scenarios has important scientific meanings for the maintenance and reconstruction of the ecosystem.The artificial Populus of Horqin Sandy Land was selected as the test materials to measure the light response and CO2 response curves by using Li-6400 infrared gas analyzer.The testing scenarios included comparison across different months,tender and mature leaves,morning and afternoon,as well as different CO2 concentrations and light intensity environments.Further,the net photosynthetic rate(Pn),transpiration rate(Tr)and water use efficiency(WUE)were analyzed.The results indicated that:Under the same light intensity and CO2 concentration,the Pnat vigorous growth period was larger than that at the initial and late growth periods.The Pn,Trand WUE were significantly different by comparing tender and mature leaves,the transpiration of tender leaves was relatively stronger,while photosynthesis of mature leaves was relatively stronger.These findings provided main reference value for the study of the physiology of artificial Populusin semiarid areas.
Fully analyzing the photosynthetic physiological characteristics of the main sand-fixing species in multiple scenarios has important scientific meanings for the maintenance and reconstruction of the ecosystem.The artificial Populus of Horqin Sandy Land was selected as the test materials to measure the light response and CO2 response curves by using Li-6400 infrared gas analyzer.The testing scenarios included comparison across different months,tender and mature leaves,morning and afternoon,as well as different CO2 concentrations and light intensity environments.Further,the net photosynthetic rate(Pn),transpiration rate(Tr)and water use efficiency(WUE)were analyzed.The results indicated that:Under the same light intensity and CO2 concentration,the Pnat vigorous growth period was larger than that at the initial and late growth periods.The Pn,Trand WUE were significantly different by comparing tender and mature leaves,the transpiration of tender leaves was relatively stronger,while photosynthesis of mature leaves was relatively stronger.These findings provided main reference value for the study of the physiology of artificial Populusin semiarid areas.
引文
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[16]张江涛,晏增,杨淑红,等.干旱胁迫对杨树品种2025及其2个芽变品种叶片光合生理特征的影响[J].中南林业科技大学学报,2017,37(3):17-23,78.
[17]尤鑫,龚吉蕊.新疆两个品系杂交杨叶绿素荧光生态适应性特征[J].四川大学学报(自然科学版),2015,52(1):149-156.
[18]莫康乐,陈立欣,周洁,等.永定河沿河沙地杨树人工林蒸腾耗水特征及其环境响应[J].生态学报,2014,34(20):5812-5822.
[19] Jiang G M,He W M.Species and habitat variability of photosynthesis,transpiration and water use efficiency of different plant species in Maowusu Sand Area[J].Acta Botanica Sinica,1999,41(10):1114-1124.
[20] Xia J B,Zhang S Y,Zhang G C,et al.Critical responses of photosynthetic efficiency in Campsis radicans(L.)Seem to soil water and light intensities[J].African Journal of Biotechnology,2011,10(77):17748-17754.
[2]叶子飘,于强.光合作用光响应模型的比较[J].植物生态学报,2008,32(6):1356-1361.
[3]韩刚,赵忠.不同土壤水分下4种沙生灌木的光合光响应特性[J].生态学报,2010,30(15):4019-4026.
[4]徐俊增,彭世彰,魏征,等.不同供氮水平及水分调控条件下水稻光合作用光响应特征[J].农业工程学报,2012,28(2):72-76.
[5]王景燕,龚伟,包秀兰,等.水肥耦合对汉源花椒幼苗叶片光合作用的影响[J].生态学报,2016,36(5):1321-1330.
[6]秦景,贺康宁,朱艳艳.库布齐沙漠几种常见灌木光合生理特征与土壤含水量的关系[J].北京林业大学学报,2009,31(1):37-43.
[7]李媛,查天山,贾昕,等.半干旱区典型沙生植物油蒿(Artemisia ordosica)的光合特性[J].生态学杂志,2015,34(1):86-93.
[8]王海珍,韩路,徐雅丽,等.胡杨异形叶光合作用对光强与CO2浓度的响应[J].植物生态学报,2014,38(10):1099-1109.
[9]刘泽彬,程瑞梅,肖文发,等.不同淹水时间下中华蚊母树光响应特征及其模型比较[J].应用生态学报,2015,26(4):1083-1090.
[10]云文丽,侯琼,王海梅,等.不同土壤水分对向日葵光合光响应的影响[J].应用气象学报,2014,25(4):476-482.
[11]张峰,周广胜.玉米农田冠层光合参数的多光谱遥感反演[J].植物生态学报,2014,38(7):710-719.
[12]张津林,张志强,查同刚,等.沙地杨树人工林生理生态特性[J].生态学报,2006,26(5):1523-1532.
[13]张弥,吴家兵,关德新,等.长白山阔叶红松林主要树种光合作用的光响应曲线[J].应用生态学报,2006,17(9):1575-1578.
[14] Aspinwall M J,King J S,Mc Keand S E,et al.Leaf level gas exchange uniformity and photosynthetic capacity among loblolly pine(Pinus taeda L.)genotypes of contrasting inherent genetic variation[J].Tree Physiology,2011,31(1):78-91.
[15]董志新,韩清芳,贾志宽,等.不同苜蓿品种(Medicago sativa L.)光合速率对光和CO2浓度的响应特征[J].生态学报,2007,27(6):2272-2278.
[16]张江涛,晏增,杨淑红,等.干旱胁迫对杨树品种2025及其2个芽变品种叶片光合生理特征的影响[J].中南林业科技大学学报,2017,37(3):17-23,78.
[17]尤鑫,龚吉蕊.新疆两个品系杂交杨叶绿素荧光生态适应性特征[J].四川大学学报(自然科学版),2015,52(1):149-156.
[18]莫康乐,陈立欣,周洁,等.永定河沿河沙地杨树人工林蒸腾耗水特征及其环境响应[J].生态学报,2014,34(20):5812-5822.
[19] Jiang G M,He W M.Species and habitat variability of photosynthesis,transpiration and water use efficiency of different plant species in Maowusu Sand Area[J].Acta Botanica Sinica,1999,41(10):1114-1124.
[20] Xia J B,Zhang S Y,Zhang G C,et al.Critical responses of photosynthetic efficiency in Campsis radicans(L.)Seem to soil water and light intensities[J].African Journal of Biotechnology,2011,10(77):17748-17754.
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