生态学报2017，Vol.37Issue(20)：6679-6690,12.DOI:10.5846/stxb201607291552
植被光合呼吸模型在长白山温带阔叶红松林的优化及验证
Optimization and validation of the vegetation photosynthesis and respiration model in a temperate broad-leaved Korean pine forest
摘要
Abstract
Optimizing key parameters of the Vegetation Photosynthesis and Respiration Model (VPRM) is crucial for accurately calculating net ecosystem CO2 exchange (NEE).The objectives of the present study were to use data measured in temperate broad-leaved Korean pine forest at Changbaishan (CBS) in 2005 to optimize four VPRM parameters,maximal light use efficiency (ε0),half-saturation value of photosynthetically active radiation (PAR0),and two respiration parameters (α,β),and to evaluate the simulation results using data measured in 2006.Using the optimized parameters,the VPRM was able to accurately simulate variation in net ecosystem CO2 exchange (NEE) during the growing season of 2006.For 30 min NEE simulation,the mean bias was-1.81 μmol m-2 s-1,and the correlation coefficient was 0.72.In regards to daily variation,the peak NEE value was underestimated by 9％,and the correlation coefficient was 0.97.However,the VPRM was unable to accurately simulate NEE during the non-growing season.During this period,the mean bias for 30 min NEE simulation was 0.39 μmol m-2 s-1,and the correlation coefficient was 0.10.In regards to daily variation during the non-growing season,the peak NEE value was underestimated by 82％,and the correlation coefficient was 0.50.Furthermore,we also found that the VPRM is better suited for simulating NEE on sunny days than on cloudy or rainy days.The present study facilitates application of the VPRM to studies of the NEE of temperate broad-leaved Korean pine forest and has important significance for improving simulation of regional terrestrial ecosystem NEE.关键词
植被光合呼吸模型/生态系统净CO2交换/参数优化/长白山温带阔叶红松林Key words
vegetation photosynthesis and respiration model (VPRM)/net ecosystem CO2 exchange (NEE)/parameter optimization/temperate broad-leaved Korean pine forest引用本文复制引用
张嘉荣,王咏薇,张弥,刁一伟,刘诚..植被光合呼吸模型在长白山温带阔叶红松林的优化及验证[J].生态学报,2017,37(20):6679-6690,12.基金项目
国家自然科学基金(31100359,31200377) （31100359,31200377）
教育部“长江学者和创新团队发展计划” （）
江苏高校优势学科建设工程(PAPD)项目 （PAPD）
