中国草地学报2025，Vol.47Issue(12)：1-10,10.DOI:10.16742/j.zgcdxb.20240481
放牧干扰下荒漠草原风沙通量对植被盖度变化的响应
Response of Aeolian Sediment Flux to Vegetation Coverage Change in Desert Steppe under Grazing Disturbance
摘要
Abstract
Overgrazing will destroy grassland,aggravate vegetation degradation,and induce soil wind erosion.In this study,wind erosion monitoring was conducted on Stipa breviflora desert steppe under dif-ferent grazing intensity(CK:control,LG:light grazing,MG:moderate grazing,HG:heavy grazing).Plant community coverage was also measured to explore the patterns of aeolian sediment flux at sand collec-tion height of 0-120 cm aboveground and its relationship with vegetation under different grazing intensities.The results showed that during the growing season of Stipa breviflora desert steppe:(1)Under different grazing intensities,the plant community coverage from May to October demonstrated the pattern of CK>LG>MG>HG.Under the same grazing intensity,it initially increased then decreased.(2)With the increase of grazing intensity,the total aeolian sediment flux rose gradually,with the value under LG,MG and HG reaching 1.40,1.82,and 1.95 times of that under CK,respectively.(3)There was a significant negative correlation between plant community coverage and total aeolian sediment flux across all grazing intensities(P<0.05).(4)The functional relationship among grazing intensity(G),plant community coverage(C),and total aeolian sediment flux(Q)was constructed:Q=(0.003 5G2-0.020 2G-0.032 7)C+(-0.251 2G2+1.478G+2.463 6).The goodness of fit(R2)of plant community coverage and total aeolian sediment flux in CK,LG and MG was greater than 0.9,indicating high goodness-of-fit,while R2 of HG was only 0.54,which offers a more integrated solution by striking a viable balance between aeolian sediment flux reduction and herder livelihood needs.Despite ideal windbreak and sand fixation performance of the CK and LG treatments,the MG treatment integrated the requirement of grassland ecosystem multifunctional role on aeolian sediment flux bloking and livelihood needs of herdsmen.This finding provides a scientific basis for exploring ecological protection and resource utilization in desert steppe,and has important practical value for establishing a sustainable and coordinated human-land grassland management framework.关键词
植被盖度/放牧/荒漠草原/风沙通量/数学模型Key words
Vegetation coverage/Grazing/Desert grasslands/Aeolian sediment flux/Mathematical model分类
农业科技引用本文复制引用
SUN Xueyan,LI Zhiguo,LYU Shijie,WANG Xinyu,DUAN Leiyu,CUI Le..放牧干扰下荒漠草原风沙通量对植被盖度变化的响应[J].中国草地学报,2025,47(12):1-10,10.基金项目
内蒙古自治区一流学科科研专项项目(YLXKZX-NND-029) （YLXKZX-NND-029）
国家科技部项目(G2022005006L) （G2022005006L）
创新平台载体(人才)计划项目(2022PT0003) （人才）
