7种北美橡树的光合生理特性分析
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摘要
为了解7种北美橡树的光合差异,选择3年生北美橡树幼林为研究对象,运用Li-6400P光合作用测定仪测定幼树叶片的光响应曲线和光合日变化。结果表明:7种北美橡树的光合特性存在较大差异。柳栎、娜塔栎、舒玛栎、沼生栎、南方红栎的净光合速率日变化呈单峰型,不存在明显"午休"现象,而猩红栎和无柄栎的叶片净光合速率呈双峰型,存在光合"午休"现象,不同北美橡树净光合速率日均值从大到小依次为柳栎、娜塔栎、沼生栎、舒玛栎、无柄栎、南方红栎、猩红栎。通过相关性系数分析,发现柳栎、娜塔栎的净光合速率(Pn)均与光合有效辐射(PAR)呈显著正相关。在模拟光辐射条件下,7种北美橡树的光补偿点在8~40μmol·m-2s-1范围内,光饱和点在310~710μmol·m-2s-1之间。柳栎、娜塔栎通过引种栽培产生了光照适应性,人工种植时应选择光照充足的地块,合理密植以促进幼树生长。
For understanding the photosynthetic of seven north American oak, the paper uses the Li-6400 P photosynthetic apparatus to determine the light response curves and diurnal variation of triennial oaks' sapling leaves.The result shows the photosynthetic properties of seven north American oaks were significantly different.The diurnal change of net photosynthetic rate of Quercus coccinea and Quercus imbricaria was a bimodal curve,and obvious"noon break"phenomenon was presented,but others were unimodal curves.The average daily average of the net photosynthetic rate from large to small of oaks are Quercus phellos, Quercus nuttallii, Quercus michauxii, Quercus shumardii, Quercus imbricaria, Quercus falcate and Quercus coccinea in North America.There is a positive correlation between photosynthetic rate(Pn) and photosynthetically active radiation(PAR) for Quercus phellos and Quercus nuttalliiduring the photosynthetic characteristics and impact factors analysis. Undering the radiation conditions, the light compensation point(LCP) of seven north American oaks is between 8 and 40 μmol·m-2 s-1, and the light saturation point(LSP) is between 310 and 710 μmol·m-2 s-1. The conclusion shows: Quercus phellos and Quercus nuttallii can grow through the illumination adaptability,famer should choose enough light land to plant tree species,reasonable density can promote the growth of young trees.
For understanding the photosynthetic of seven north American oak, the paper uses the Li-6400 P photosynthetic apparatus to determine the light response curves and diurnal variation of triennial oaks' sapling leaves.The result shows the photosynthetic properties of seven north American oaks were significantly different.The diurnal change of net photosynthetic rate of Quercus coccinea and Quercus imbricaria was a bimodal curve,and obvious"noon break"phenomenon was presented,but others were unimodal curves.The average daily average of the net photosynthetic rate from large to small of oaks are Quercus phellos, Quercus nuttallii, Quercus michauxii, Quercus shumardii, Quercus imbricaria, Quercus falcate and Quercus coccinea in North America.There is a positive correlation between photosynthetic rate(Pn) and photosynthetically active radiation(PAR) for Quercus phellos and Quercus nuttalliiduring the photosynthetic characteristics and impact factors analysis. Undering the radiation conditions, the light compensation point(LCP) of seven north American oaks is between 8 and 40 μmol·m-2 s-1, and the light saturation point(LSP) is between 310 and 710 μmol·m-2 s-1. The conclusion shows: Quercus phellos and Quercus nuttallii can grow through the illumination adaptability,famer should choose enough light land to plant tree species,reasonable density can promote the growth of young trees.
引文
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[19]高超,闫文德,田大伦,等.杜仲光合速率日变化及其与环境因子的关系[J].中南林业科技大学学报,2011,31(5):100-104.
[20]蒋燚,李志辉,朱积余,等.不同红锥种源幼林光合特性日变化测定与分析[J].中南林业科技大学学报,2013,33(6):43-47.
[2]权红,李连强,袁芳,等.7个颠茄品系的光合特性比较研究[J].中药材,2016,39(7):1457-1461.
[3]吴家兵,关德新,张弥,等.长白山地区蒙古栎光合特性[J].中国科学院研究生院学报,2006,23(4):549-554.
[4]丁瑞霞,聂俊峰,杨宝平.便携式光合作用测定仪测定作物指标问题探讨[J].现代农业科技,2015(24):147-150.
[5]吴泽龙,谭晓风,袁军,等.油茶不同叶龄叶片形态与光合参数的测定[J].经济林研究,2016,34(2):24-29.
[6]曹军胜,刘广全.刺槐光合特性的研究[J].西北农业学报,2005,14(3):118-122,136.
[7]朱万泽,王金锡,薛建辉.台湾桤木引种的光合生理特性研究[J].西北植物学报2004,24(11):2012-2019.
[8]薛雪,李娟娟,郑云峰,等.5个常绿园林树种夏季光合蒸腾特性[J].林业科学,2015,51(9):150-155.
[9]全先奎,王传宽.兴安落叶松对环境变化的物候驯化和光合能力适应[J].生态学报2015,35(13):4538-4546.
[10]阚祥绪,施利民,周恭伟.植物光合作用的测定及不同波长的光对光合作用的影响[J].生物学通报,2005,40(4):50-51.
[11]许大全.光合作用测定及研究中一些值得注意的问题[J].植物生理学通讯,2006,42(6):1163-1167.
[12]余刚,邢昊,张永君.东北红豆杉光合特性研究[J].吉林林业科技,2015,44(5):19-30.
[13]胡启鹏,孙玲玲,郭志华,等.常绿阔叶林中几种不同功能组树种叶形态、光合及光诱导对不同环境的响应[J].华南农业大学学报,2013,34(2):207-212.
[14]王泽瑞.几种红色系彩叶树种光合特性及呈色机理的研究[D].合肥:安徽农业大学,2001.
[15]高鹤,宗俊勤,陈静波,等.7种优良观赏草光合生理日变化及光响应特征研究[J].草业学报,2010,19(4):87-93.
[16]姜琳,杨暖,姜官恒,等.三种不同叶色栎树光合特性研究[J].山东林业科技,2016(2):12-16.
[17]李林锋.4种湿地植物光合作用特性的比较研究[J].西北植学报,2008,28(10):2094-2102.
[18]唐建宁,康建宏,许强,等.秦艽与小秦艽光合日变化的研究[J].西北植物学报,2006,26(4):836-841.
[19]高超,闫文德,田大伦,等.杜仲光合速率日变化及其与环境因子的关系[J].中南林业科技大学学报,2011,31(5):100-104.
[20]蒋燚,李志辉,朱积余,等.不同红锥种源幼林光合特性日变化测定与分析[J].中南林业科技大学学报,2013,33(6):43-47.