基于RWEQ的荒漠草原梯度放牧土壤风蚀研究

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中图分类号：S1821.4十3 文献标识码：A 文章编号：1007-0435（2025）11-3799-11

引用格式：，等.基于RWEQ的荒漠草原梯度放牧土壤风蚀研究[J].草地学报，2025，33（11）：3799—3809 WANG Xiao-yan，LYU Shi-jie，WANG Rong，etal.A Study ofSoil Wind Erosion under Gradient Grazing in Desert Steppe Based on RWEQ[J].Acta Agrestia Sinica，2025，33（11） ：3799-3809

A Study of Soil Wind Erosion under Gradient Grazing in Desert Steppe Based on RWEQ

WANG Xiao-yan，LYU Shi-jie，WANG Rong，WANG Xin-yu，LI Zhi-guo* （College ofGrassandScience，InnerMongoliaAgriculturalUniversity，Hohhot，InnerMongolia Oloooo，China）

Abstract：Wind erosion is one of the major ecological and environmental problems in the aridand semi-arid steppe areas of northerm China，which not only affects the stability of steppe ecosystems，but also exacerbates the problems of land degradation and desertification，and is a key factor affcting agricultural production and ecological security in the region.In this study，diferent grazing gradients were selected to investigate the relationship between grazing intensity and wind-sand flux and wind-erosion influencing factors，and to optimize the predictive ability of wind-erosion model. This experiment was carried out in a desert steppe grazing trial site through 4 treatments of control（CK），light grazing（LG），moderate grazing（MG）and heavy grazing（HG）， by the randomized block design with three replications. Based on the observations of wind and sand fluxes and wind erosion influence factor indicators of different grazing gradients in 2021-2022 ，some empirical parameters in the RWEQ model were calibrated and the calculation method of critical sand initiation wind speed was optimized.The results showed thatthe optimized RWEQ had agood fit between the predicted and measured windsand fluxes under different grazing intensities in 2O22 with d=0.67 ，and R2 of 0.9365， P<0.01 ，and the correlation between the predicted and measured wind-sand fluxes was good. The predicted results of the optimized RWEQ in the experimental area of diferent grazing intensities in desert steppe have a greater reference value for formulating reasonable grazing intensities，planning grazing time，guiding vegetation restoration，and assessing the impacts of grazing on ecosystem health.

Key words：Desert steppe;soil wind erosion;grazing intensity;RWEQ model

风蚀是侵蚀作用中的一种，其占据着重要的地位，尤其是在干旱、半干旱地区，它是地表侵蚀的主导力量[1-2]。（剩余17881字）