文献类型：期刊文献

英文题名：Light use efficiency of a warm-temperate mixed plantation in north China

作者：Tong, Xiaojuan[1] Zhang, Jinsong[2] Meng, Ping[2] Li, Jun[3] Zheng, Ning[2]

第一作者：Tong, Xiaojuan

通信作者：Tong, XJ[1]

机构：[1]Beijing Forestry Univ, Coll Forestry, Beijing 100083, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry, Key Lab Tree Breeding & Cultivat State Forestry A, Beijing 100091, Peoples R China;[3]Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China

年份：2017

卷号：61

期号：9

起止页码：1607-1615

外文期刊名：INTERNATIONAL JOURNAL OF BIOMETEOROLOGY

收录：;Scopus(收录号：2-s2.0-85016641775);WOS:【SCI-EXPANDED(收录号:WOS:000410745700010)】；

基金：This study was sponsored by the National Natural Science Foundation of China (31570617, 31100322) and the Fundamental Research Funds for the Central Universities (No. YX2011-19).

语种：英文

外文关键词：Gross primary productivity; Light use efficiency; Clearness index; Mixed plantation

摘要：Light use efficiency (LUE) is one of the important parameters on calculating terrestrial gross primary productivity (GPP) and net primary productivity (NPP). Based on 5-year (2006-2010) carbon flux and climatic variable data of a mixed plantation in north China, the seasonal and interannual variation of LUE was investigated and the biophysical controls were examined. Our results show that LUE had a distinct seasonal course, and peaked in the vigorous growing season with a value of 0.92-1.27 g C MJ(-1). During the period of 2006-2010, annual mean LUE ranged between 0.54 and 0.62 g C MJ(-1), and it was linearly correlated with annual GPP. In the growing season, LUE was significantly linked with the water availability variables (including monthly mean vapor pressure deficit (VPD), precipitation, evaporative fraction (EF), and the ratio of precipitation to evapotranspiration (P/ET)) and canopy conductance (g (c)). However, EF was a better estimator of LUE compared with other biophysical variables. LUE decreased with an increase of the clearness index (CI), indicating that LUE was higher under cloudy sky conditions than that under sunny sky conditions in the mixed plantation.