安庆市区香樟叶片氮磷化学计量特征及其与土壤和叶片性状的关系
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摘要
在安庆市区选择7个生境,于夏季和冬季采集香樟叶片和土壤样品,分析叶片N、P养分化学计量特征在季节和生境间的变异特征及其与土壤和叶片性状的关系。结果表明:夏季和冬季香樟叶片N含量均值为10.91和11.10 mg/g,叶片P含量均值为1.04和1.07 mg/g,叶片N∶P均值为10.62和10.47,呈明显的N限制。各参数变异系数在0.158～0.275之间,属中等偏弱变异。叶片养分计量特征在不同生境间及各生境的不同季节间均有一定差异,但无明显规律。夏季叶片N、P之间呈等速分配关系,而冬季呈N分配速率高于P的异速关系。夏季叶片P分配速率高于冬季,符合生长速率理论。叶片化学计量特征与土壤因子关系较弱,而与叶片自身属性(如叶片大小、含水量)关系密切。
Seven habitats in Anqing City were selected, leaf samples of Cinnamomum camphora and the corresponding soil samples were collected in either summer or winter, and then the variation characteristics of leaf N-P stoichiometry on seasons and habitats and their correlations, and the relationships with soils and leaf functional traits were analyzed. The result showed that, the average contents of leaf N were 10.91 and 11.10 mg/g, the mean values of leaf P were 1.04 and 1.07 mg/g, and the mean values of leaf N∶P were 10.62 and 10.47, reflecting obvious N limitation. The variation coefficients ranged from 0.158 and 0.275, showing moderate and weak variation. The leaf stoichiometric characteristics varied in habitats and seasons in different habitats, but non-significant tendency was found. Leaf N and P represented isometric relationship in summer, while they presented allometric relationship that the allocation rate of leaf N is higher than leaf P. The allocation rate of leaf P in summer was higher than that in winter, according with the Growth Rate Hypothesis. Leaf stoichiometric characteristics of C. camphora were related with soil factors weakly, but correlated with leaf traits(e.g., leaf size and water content) closely.
Seven habitats in Anqing City were selected, leaf samples of Cinnamomum camphora and the corresponding soil samples were collected in either summer or winter, and then the variation characteristics of leaf N-P stoichiometry on seasons and habitats and their correlations, and the relationships with soils and leaf functional traits were analyzed. The result showed that, the average contents of leaf N were 10.91 and 11.10 mg/g, the mean values of leaf P were 1.04 and 1.07 mg/g, and the mean values of leaf N∶P were 10.62 and 10.47, reflecting obvious N limitation. The variation coefficients ranged from 0.158 and 0.275, showing moderate and weak variation. The leaf stoichiometric characteristics varied in habitats and seasons in different habitats, but non-significant tendency was found. Leaf N and P represented isometric relationship in summer, while they presented allometric relationship that the allocation rate of leaf N is higher than leaf P. The allocation rate of leaf P in summer was higher than that in winter, according with the Growth Rate Hypothesis. Leaf stoichiometric characteristics of C. camphora were related with soil factors weakly, but correlated with leaf traits(e.g., leaf size and water content) closely.
引文
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[21]李磊,李向义,林丽莎,等.两种生境条件下6种牧草叶绿素含量及荧光参数的比较[J].植物生态学报,2011,35(6):672-680.
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[25]张钊沁,辜翔,李岩,等.长沙市10种园林绿化树种鲜叶碳、氮、磷生态化学计量特征[J].广西林业科学,2015,44(3):264-270.
[26]HAN W,FANG J,GUO D,et al.Leaf nitrogen and phosphorus stoichiometry across 753 terrestrial plant species in China[J].New Phytologist,2005,168:377-385.
[27]俞月凤,彭晚霞,宋同清,等.喀斯特峰丛洼地不同森林类型植物和土壤C、N、P化学计量特征[J].应用生态学报,2014,25(4):947-954.
[28]CLEVELAND C C,LIPTZIN D.C∶N∶P stoichiometry in soil:is there a “Redfield ratio” for the microbial biomass[J].Biogeochemistry,2007,85:235-252.
[29]韩玲,赵成章,徐婷,等.张掖湿地芨芨草叶大小和叶脉密度的权衡关系[J].植物生态学报,2016,40(8):788-797.
[30]REICH P B,OLEKSYN J,WRIGHT I J,et al.Evidence of a general 2/3-power law of scaling leaf nitrogen to phosphorus among major plant groups and biomes[J].Proceedings of the Royal Society B:Biological Sciences,2010,277(1683):877-883.
[2]LEROUX S J,WAL E V,WIERSMA Y F,et al.Stoichiometric distribution models:ecological stoichiometry at the landscape extent[J].Ecology Letters,2017,20:1495-1506.
[3]SARDANS J,RIVAS-UBACH A,PE?UELAS J.The C:N:P stoichiometry of organisms and ecosystems in a changing world:a review and perspectives[J].Perspectives in Plant Ecology,Evolution and Systematics,2012,14(1):33-47.
[4]林永静,武梦娟,卢同平,等.中国生态化学计量学研究热点的可视化分析[J].生物学杂志,2018,35(2):62-65.
[5]SUN X,GAO Y,WANG D,et al.Stoichiometric variation of halophytes in response to changes in soil salinity[J].Plant Biology,2017,19:360-367.
[6]卢同平,史正涛,牛洁,等.我国陆生生态化学计量学应用研究进展与展望[J].土壤,2016,48(1):29-35.
[7]HE M Z,DIJKSTRA F A,ZHANG K,et al.Leaf nitrogen and phosphorus of temperate desert plants in response to climate and soil nutrient availability[J].Scientific Reports,2014,4:6932.
[8]任书杰,于贵瑞,陶波,等.中国东部南北样带654种植物叶片氮和磷的化学计量学特征研究[J].环境科学,2007,28(12):2665-2673.
[9]LYU X T,KONG D L,PAN Q M,et al.Nitrogen and water availability interact to affect leaf stoichiometry in a semi-arid grassland[J].Oecologia,2012,168:301-310.
[10]肖遥,陶冶,张元明.4种荒漠草本植物不同生长期生物量分配与叶片化学计量特征[J].植物生态学报,2014,38(9):929-940.
[11]杨欢,尹春英,郑东辉,等.川西亚高山针叶林云杉和冷杉生长季和非生长季叶片碳氮磷化学计量特征[J].应用与环境生物学报,2017,23(6):1089-1095.
[12]WU T G,WANG G G,WU Q T,et al.Patterns of leaf nitrogen and phosphorus stoichiometry among Quercus acutissima provenances across China[J].Ecological Complexity,2014,17:32-39.
[13]YUE K,FORNARA D A,YANG W,et al.Effects of three global change drivers on terrestrial C:N∶P stoichiometry:a global synthesis[J].Global Change Biology,2017,23:2450-2463.
[14]WU T G,YU M K,WANG G G,et al.Leaf nitrogen and phosphorus stoichiometry across forty-two woody species in Southeast China[J].Biochemical Systematics and Ecology,2012,44:255-263.
[15]SARDANS J,GRAU O,CHEN H Y H,et al.Changes in nutrient concentrations of leaves and roots in response to global change factors[J].Global Change Biology,2017,23:3849-3856.
[16]潘少安,彭国全,杨冬梅.从叶内生物量分配策略的角度理解叶大小的优化[J].植物生态学报,2015,39(10),971-979.
[17]田志会,王润,赵群,等.2000-2012年北京绿地生态系统服务价值时空变化规律的研究[J].中国农业大学学报,2017,22(6):76-83.
[18]陈云,王金亮,杨艳林,等.昆明高校园林植被光合及光谱特性研究[J].生态科学,2018,37(2):68-77.
[19]甘露,陈伏生,胡小飞,等.南昌市不同植物类群叶片氮磷浓度及其化学计量比[J].生态学杂志,2008,27(3):344-348.
[20]方文稳,张丽,叶生霞,等.安庆市降尘重金属的污染评价与健康风险评价[J].中国环境科学,2015,35(12):3795-3803.
[21]李磊,李向义,林丽莎,等.两种生境条件下6种牧草叶绿素含量及荧光参数的比较[J].植物生态学报,2011,35(6):672-680.
[22]鲍士旦.土壤农化分析(3版)[M].北京:中国农业出版社,2007,25-114.
[23]阎恩荣,王希华,郭明,等.浙江天童常绿阔叶林、常绿针叶林与落叶阔叶林的C:N∶P化学计量特征[J].植物生态学报,2010,34(1):48-57.
[24]王亚军,郁珊珊.城市绿化植物-凋落物-土壤系统碳氮磷化学计量特征研究[J].西北植物学报,2017,37(1):171-180.
[25]张钊沁,辜翔,李岩,等.长沙市10种园林绿化树种鲜叶碳、氮、磷生态化学计量特征[J].广西林业科学,2015,44(3):264-270.
[26]HAN W,FANG J,GUO D,et al.Leaf nitrogen and phosphorus stoichiometry across 753 terrestrial plant species in China[J].New Phytologist,2005,168:377-385.
[27]俞月凤,彭晚霞,宋同清,等.喀斯特峰丛洼地不同森林类型植物和土壤C、N、P化学计量特征[J].应用生态学报,2014,25(4):947-954.
[28]CLEVELAND C C,LIPTZIN D.C∶N∶P stoichiometry in soil:is there a “Redfield ratio” for the microbial biomass[J].Biogeochemistry,2007,85:235-252.
[29]韩玲,赵成章,徐婷,等.张掖湿地芨芨草叶大小和叶脉密度的权衡关系[J].植物生态学报,2016,40(8):788-797.
[30]REICH P B,OLEKSYN J,WRIGHT I J,et al.Evidence of a general 2/3-power law of scaling leaf nitrogen to phosphorus among major plant groups and biomes[J].Proceedings of the Royal Society B:Biological Sciences,2010,277(1683):877-883.
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