摘要 【目的】干旱半干旱地区的土地利用方式直接影响着土壤风蚀的强度,研究不同时期土地利用方式对土壤风蚀的影响,为新时期国土空间格局合理布局和祖国北疆生态屏障建设提供科学依据。【方法】以地处干旱半干旱区典型农牧交错区的内蒙古四子王旗为例,基于RWEQ模型定量模拟1990-2015年研究区不同时期土壤风蚀模数,分析研究区土壤风蚀变化特征,揭示土地利用变化对土壤风蚀的影响。【结果】1990-2015年四子王旗土壤风蚀情况整体呈现稳趋向好态势,其中1990-2000年,土壤风蚀模数呈上升趋势,年均增长1.34 t/hm2;2000-2015年,土壤风蚀模数呈下降趋势,年均下降2.59 t/hm2。【结论】不同的土地利用方式及土地利用结构,产生的土壤风蚀效应不同,有利用趋于生态环境稳定的土地利用结构是降低土壤风蚀强度的主要途径。 【Objective】The land use pattern in arid and semi-arid areas directly affected the intensity of soil wind erosion,and the effects of land use pattern on soil wind erosion in different periods were studied,so as to provide the scientific basis for the rational layout of land space pattern and the construction of ecological barrier in northern Xinjiang in the new period.【Method】Taking Siziwang of Inner Mongolia,a typical farming-pastoral interlacing area in arid and semi-arid regions,as an example,the wind erosion modulus of soil in different periods of the study area from 1990 to 2015 was quantitatively simulated based on RWEQ model,and the characteristics of soil wind erosion changes in the study area were analyzed to reveal the impact of land use changes on soil wind erosion.【Result】From 1990 to 2015,the soil wind erosion in Siziwang banner presented a stable trend on the whole,of which from 1990 to 2000,soil wind erosion modulus showed an increasing trend with an average annual growth of 1.34 t/hm2;From 2000 to 2015,soil wind erosion modulus showed a decreasing trend with an average annual decline of 2.59 t/hm2.【Conclusion】Different land use patterns and land use structures produce different soil wind erosion effects,and the land use structure that tends to be ecologically stable is the main way to reduce soil wind erosion intensity.
出处 《西南农业学报》 CSCD 北大核心 2021年第3期575-583,共9页 Southwest China Journal of Agricultural Sciences
基金 内蒙古师范大学研究生创新基金(CXJJS19142)。
关键词 土壤风蚀 风蚀模数 RWEQ模型 土地利用方式 四子王旗 Soil wind erosion Wind erosion modulus RWEQ model Land use mode Siziwang
