首页 | 本学科首页   官方微博 | 高级检索  
   检索      

兴安落叶松(Larix gmelinii Rupr.)叶片养分的空间分布格局
引用本文:任书杰,于贵瑞,陶波,官丽莉,方华军,姜春明.兴安落叶松(Larix gmelinii Rupr.)叶片养分的空间分布格局[J].生态学报,2009,29(4):1899-1906.
作者姓名:任书杰  于贵瑞  陶波  官丽莉  方华军  姜春明
作者单位:中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室,CERN综合研究中心,北京,100101
基金项目:国家自然科学基金重大项目,中国科学院知识创新工程重要方向性项目,国家自然科学基金重大国际(地区)合作与交流资助项目,国家自然科学基金 
摘    要:对中国东北温带森林生态系统主要树种兴安落叶松(Larix gmelinii Rupr.)24个采样点72个叶片样品有机碳(C)、全氮(N)、全磷(P)和全钾(K)的化学组成、地理分布格局及其与气候因子的关系进行了研究.结果表明,叶片C、N、P和K含量的几何平均数分别为543.970、16.902、2.373mg/g和14.625mg/g,且叶片的C含量>N含量>K含量>P含量;叶片的C/N、C/P和N/P分别为32.183、229.226和7.123.随纬度的增加、年均温度和年均降雨量的降低,兴安落叶松叶片C、N含量和N/P显著降低,叶片C/N和K含量显著升高,叶片P含量和C/P的变化没有达到显著水平.叶片N含量随纬度与年均温度的变化与全球及其它大尺度的研究结果相反,而N/P与其一致,这与在该区域的其它物种的研究结果基本一致.这可能是由于在本研究区域北部寒温带越往高纬度地区年均温度和年均降雨量越低、生长季越短,因此成土作用弱导致植物可以吸收利用的养分越少,但是由于植物显著降低的N含量和变化不明显的P含量导致了叶片N/P随纬度的增加和年均温度和年均降雨量的降低而降低,这与全球尺度的研究结果一致.兴安落叶松叶片养分分布格局与全球尺度和中国区域研究结果的差异说明了加强区域叶片养分特征研究的重要性.叶片养分与气候因子的显著线性相关说明气候因子是影响叶片养分特征的一个主要因子.

关 键 词:生态化学计量学  兴安落叶松  年均温度  年均降雨量  纬度  分布格局  叶片养分
收稿时间:2007/12/20 0:00:00
修稿时间:2008/4/23 0:00:00

Spatial patterns for variations in leaf nutrient contents of Dahurian Larch (Larix gmelinii Rupr.)
REN Shu-Jie,YU Gui-Rui,TAO Bo,GUAN Li-Li,FANG Hua-Jun,JIANG Chun-Ming.Spatial patterns for variations in leaf nutrient contents of Dahurian Larch (Larix gmelinii Rupr.)[J].Acta Ecologica Sinica,2009,29(4):1899-1906.
Authors:REN Shu-Jie  YU Gui-Rui  TAO Bo  GUAN Li-Li  FANG Hua-Jun  JIANG Chun-Ming
Abstract:Spatial patterns for leaf nutrient contents of Dahurian larch (Larix gmelinii Rupr.) based on the analysis of 72 samples in 24 sites in temperate forest ecosystems in Northeast China were studied. The studied region belongs to the cold temperate zone. The results show that the geometric means of leaf organic carbon (C), nitrogen (N), potassium (K) and phosphorus (P) contents were 543.970 mg/g, 16.902 mg/g, 14.625 mg/g and 2.373 mg/g, respectively. The geometric means of C/N, C/P and N/P were 32.183, 229.226 and 7.123, respectively. With the increase of latitude and decrease in mean annual temperature (MAT) and annual precipitation (AP), leaf C and N contents and N/P ratios of Dahurian larch decreased significantly, and leaf C/N ratios and K content increased significantly, but leaf P contents had no significant change. The changes in the leaf N content with latitude, MAT and AP are different from those reported in literature, but the changes in the leaf N/P ratio are similar to those in literature, which are similar to the changes of other species in our studied region. With the increase in latitude, MAT and AP decreased, and the growing season shortened, pedogenesis was weakened and available soil nutrients for plant decreased, but N/P ratios decreased significantly because of the significant decrease in N content. This finding is similar to the results obtained in other global observations. The differences in the spatial patterns of foliar nutrient contents between Dahurian larch and global and other Chinese flora indicate the importance of an advanced understanding of leaf traits in terms of nutrient contents in a regional scale. The significant relationships between leaf nutrient contents and climatic factors suggest that climatic factors are the major forces affecting variation in the leaf nutrient traits of Dahurian larch.
Keywords:ecological stoichiometry  Larix gmelinii Rupr    mean annual temperature  annual precipitation  latitude  spatial pattern  leaf nutrient
本文献已被 维普 万方数据 等数据库收录!
点击此处可从《生态学报》浏览原始摘要信息
点击此处可从《生态学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号