新疆农业科学2025，Vol.62Issue(2)：463-473,11.DOI:10.6048/j.issn.1001-4330.2025.02.024
基于Landsat影像的伊犁河流域草地地上生物量演变分析
Above ground biomass evolution analysis of grassland in Ili River Basin based on landsat imagery
摘要
Abstract
[Objective]The evolution analysis of its grassland aboveground biomass(AGB)is of great significance for scientific understanding and rational utilization of grassland.[Methods]The spatio-temporal characteristics and stability of grassland AGB in the basin and 10 counties and cities in the basin were ana-lyzed,and the historical evolution regular of grassland was revealed by trend analysis and F-significance test.[Results]Among the established regression models,the quadratic function inversion model had the highest accuracy with a validation accuracy of 71.22％,which could be used for aboveground biomass inversion.From 1990 to 2022,the AGB of grassland in Ili River basin showed a trend of fluctuating increase,from 270.60 g/m2 in 1990 to 500.22 g/m2 in 2022,with an increase rate of 8.96 g/(m2·a),Xinyuan County had the fastest growth rate of 14.57 g/(m2·a),Khorgos City had the slowest increase rate of 4.33 g/(m2·a).In terms of spatial variation,the distribution pattern demonstrated a relatively high level in Xinyuan County and Nileke County in the east,Gongliu County,Zhaosu County in the south,Yining County in the north,while a relatively low level in Huocheng County,Qapqal Xibe Autonomous County,and Gongliu County in the west.In terms of the change trend,grassland AGB mainly focusee on improvement,accounting for 59.67％of the total grassland area.[Conclusion]In general,in the past 33 years,the grassland AGB in Ili River basin has shown a state of'mostly improved,locally stable and slightly degraded'.The'warming and humidification'of climate,the improvement and implementation of grassland protection policies have provided favorable condi-tions for the better grassland AGB.关键词
伊犁河流域/草地地上生物量/时空演变Key words
Ili River basin/aboveground biomass of grassland/spatio-temporal evolution分类
农业科技引用本文复制引用
李超,刘文昊,王生菊,范天文,吐尔逊江·艾力木别克,贺军,李建伟,文俊,张琳,靳瑰丽,李莹..基于Landsat影像的伊犁河流域草地地上生物量演变分析[J].新疆农业科学,2025,62(2):463-473,11.基金项目
第三次新疆综合科学考察项目(2022xjkk0401) （2022xjkk0401）
伊犁哈萨克自治州草原生态综合监测项目 Third Comprehensive Scientific Investigation Project in Xinjiang(2022xjkk0401) （2022xjkk0401）
Comprehensive Monitoring of Grassland Ecology in Ili Kazakh Autonomous Prefecture （）
