基于日光诱导叶绿素荧光技术的新疆植被生产力时空变化特征及其气候驱动因素分析  

Characterization of Spatial and Temporal Changes in Vegetation Productivity and its Climatic Drivers in Xinjiang Based on Daylight Induced Chlorophyll Fluorescence Technology

作　　者：陈琦 朱杰 汪怡婷 冯清华 CHEN Qi;ZHU Jie;WANG Yiting;FENG Qinghua(College of Resources and Environment,Yili Normal University,Yining 835000,China)

机构地区：[1]伊犁师范大学资源与环境学院,新疆伊宁835000

出　　处：《乡村科技》2025年第7期132-137,共6页Rural Science and Technology

基　　金：伊犁师范大学大学生创新创业训练计划项目基金(S202410764041)。

摘　　要：新疆作为我国重要的生态屏障和农业基地,其植被生产力对生态平衡和农业生产至关重要。然而,受植被生产力估算精度不足和气候要素复杂多变的影响,新疆植被生产力的现状分析及演变规律仍存在较大不确定性。基于日光诱导叶绿素荧光(SIF)遥感数据和气候数据,系统揭示了新疆植被生产力的时空演变特征。结果表明:①2001—2020年,新疆SIF数据多年平均值为0.018 mW/(m^(2)·nm·sr),呈不显著波动上升趋势;②环塔里木盆地和天山北支山脉地区SIF数据显著增加,植被生长状态得到改善,而伊犁河谷地区SIF数据略有下降,表明该区域植被出现退化迹象;③SIF数据变化与气候因子密切相关,太阳辐射主导区域占比达76.5%,温度和降水分别占13.2%和10.1%。研究结果揭示了新疆植被对气候变化的差异化响应,可为生态保护与可持续发展提供依据。As an important ecological barrier and agricultural base,the vegetation productivity of Xinjiang is crucial to ecological balance and agricultural production.However,due to the insufficient accuracy of vegetation productivity estimation and the complexity and variability of climatic factors,the current status and evolution patterns of vegetation productivity in Xinjiang are still subject to large uncertainties.This study systematically reveals the spatial and temporal evolution characteristics of vegetation productivity in Xinjiang based on daylight-induced chlorophyll fluorescence(SIF)remote sensing data and climate data.The results showed that:①the multi-year average value of SIF in Xinjiang was 0.018 mW/(m^(2)·nm·sr)from 2001 to 2020,with a non-significant fluctuating upward trend;②SIF increased significantly in the areas of the Circum-Tarim Basin and the northern branch of the Tianshan Mountains,with an improvement in the growth of vegetation,whereas SIF decreased slightly in the lli Valley area,indicating local vegetation degradation;③SIF changes were closely related to climate factors,with solar radiation contributing 76.5%,and temperature and precipitation accounting for 13.2%and 10.1%,respectively.The study reveals the differentiated response of vegetation to climate change in Xinjiang,and provides a scientific basis for ecological protection and sustainable development.

关 键 词：新疆 植被生产力 日光诱导叶绿素荧光 

分 类 号：Q948.112[生物学—植物学]