森林工程2025，Vol.41Issue(4)：676-690,15.DOI:10.7525/j.issn.1006-8023.2025.04.003
快速升温和升温间歇期兴安落叶松径向生长与归一化植被指数的关系
Relationship Between Radial Growth and NDVI of Larix gmelinii During Rapid Warming and Intermittent Warming
摘要
Abstract
The forest canopy fixes carbon dioxide in the atmosphere through photosynthesis,and the tree trunk uses the organic matter generated by the canopy for cambium splitting and thickening.Whether the assimilation of tree canopy and the radial growth of tree trunk changed synchronously in the process of climate change is controversial,and whether the synchronous or differential changes are related to the response characteristics of these two processes to climate factors is also a hot topic of attention.In particular,the same tree species in different climatic background is still to be studied.Larix gmelinii as the main coniferous forest species in cold temperate zone of China,is sensitive to climate change.Therefore,this paper selected Greater Hinggan Mountains from south to north in the Arshan(AES),Kudur(KDE)and Daebaeksan(DBS)as the research objects.Normalized difference vegetation index(NDVI)and ring width index(RWI)were used to represent the growth of tree canopy and trunk,respectively.Segmentation function and correlation analysis were used.The relationship between tree canopy and trunk growth and the differences in driving factors under different climate backgrounds were investigated.The main results were as follows:the rapid warming period significantly promoted the growth of tree canopy,mainly reflected in the early growing season(EGS)and the late growing season(LGS).However,organic matter produced by photosynthesis may be more used for canopy respiration,thus inhibiting the radial growth of trees,resulting in an insignificant relationship between tree trunk and canopy growth during this pe-riod.With the slowing down of the temperature rise rate,the growth of tree canopy was mainly reflected in the middle of the growing season(MGS)and the end of the growing season(LGS),and the relationship between tree trunk and canopy growth showed significant correlation(P<0.05).The global temperature rise rate leads to the difference in response of forest trunk and canopy growth to climate factors,which may be the root cause of the inconsistent relationship between tree trunk and canopy growth.The acceleration of global temperature rise increases the difference between trunk and canopy growth in response to climate,and on the contrary,greatly reduces the difference between the two.关键词
兴安落叶松/径向生长/NDVI/气候变暖/大兴安岭/快速升温期/升温间歇期Key words
Larix gmelinii/radial growth/NDVI/climate warming/Greater Hinggan Mountains/rapid warming pe-riod/intermittent warming period分类
农业科技引用本文复制引用
张羽,刘滨辉,苏远航..快速升温和升温间歇期兴安落叶松径向生长与归一化植被指数的关系[J].森林工程,2025,41(4):676-690,15.基金项目
国家自然科学基金项目(41877416). （41877416）
