摘要
基于植被覆盖数据、土地利用数据及气象数据,应用修正通用土壤侵蚀方程(RUSLE)模型估算贵州省的土壤侵蚀状况,分析贵州省植被覆盖及土壤侵蚀演变特征,探讨景观格局指数与土壤保持量的空间相关性特征。研究结果表明:2005—2020年贵州省植被覆盖总体处于增长性变化趋势;从2005—2020年,贵州省年平均土壤侵蚀模数总体减少0.91 t/(a·hm^(2)),主要朝减弱方向转化,且土壤保持量呈先减少后增加的趋势;研究区总体植被覆盖景观破碎化程度和异质性增加,斑块优势和抗干扰性不断增强,但景观的多样性随之降低,斑块趋于不均匀分布。不同景观格局指数与土壤保持强度的相关性及响应程度存在地理和时空上的差异,差异可能与喀斯特地区独特的地理环境和城市扩张速度存在关联性。研究结果可为喀斯特地区植被景观设计和土壤保持策略的制定提供参考。
This study utilized vegetation cover data,land use data,and meteorological information to employ the RUSLE model for assessing soil erosion status in Guizhou Province.Additionally,it analyzed the characteristics of vegetation cover evolution and trends in soil conservation within the region while investigating the spatial correlation between landscape pattern indices and soil conservation metrics.The findings indicate that from^(2)005 to 2020,vegetation cover in Guizhou Province exhibited an upward trend.During this period,the average annual soil erosion modulus decreased by 0.91 t/(a·hm^(2)),primarily reflecting a weakening trend;However,soil conservation initially declined before experiencing an increase.In the study area,both fragmentation and heterogeneity of overall vegetation cover landscapes intensified;Patch dominance and resilience against disturbances improved,yet landscape diversity diminished as patches became increasingly unevenly distributed.The correlation and responsiveness of various landscape pattern indices with respect to soil conservation intensity exhibit geographical variability across time and space-potentially linked to the unique geographical conditions and rapid urban expansion characteristic of karst regions.The results of this study can serve as valuable references for designing effective vegetation landscapes and formulating robust soil conservation strategies in karst areas.
作者
张皓茹
杨坪坪
高雄
李水
杨昌鑫
ZHANG Haoru;YANG Pingping;GAO Xiong;LI Shui;YANG Changxin(School of Karst Science,Guizhou Normal University,Guiyang,Guizhou 550001,China;State Engineering Technology Institute for Karst Desertification Control,Guiyang,Guizhou 550001,China;Guizhou Karst Mountain Land Ecology and Land Use Observation and Research Station,MNR,Ansun,Guizhou 561301,China)
出处
《贵州师范大学学报(自然科学版)》
北大核心
2025年第1期46-59,共14页
Journal of Guizhou Normal University:Natural Sciences
基金
国家自然科学基金(32101593)
贵州省科技计划项目(黔科合基础-[2021]一般220号)
贵州师范大学学术新苗基金项目(黔师新苗[2022]09号)。
关键词
RUSLE
植被景观格局
土壤保持
贵州省
喀斯特
RUSLE
vegetation landscape pattern
soil conservation
Guizhou Province
karst
