中国水土保持科学2025，Vol.23Issue(1)：109-116,8.DOI:10.16843/j.sswc.2022083
干旱风沙区不同下垫面及土地利用类型的风力侵蚀特征
Comparison of wind erosion characteristics of different typical substrates and land use types in the arid and sandy areas:
摘要
Abstract
[Background]The study of wind erosion characteristics in the arid sandy areas of Ningxia,together with the identification of soil wind erosion in different substrate types(sand dunes,shrubland,barren grassland)and land use types(available land,shrubland,barren grassland),is of great significance to the local conservation,improvement and rational use of soil and water resources,which in turn can promote the construction of a good ecological environment.[Methods]The experiment was conducted at a field station in Yanchi,Ningxia,and the monitoring period was from February to December.Five sub-bedding types were selected:mobile dune,semi-fixed dune,fixed dune,shrubland and barren grassland,where mobile dune,semi-fixed dune and fixed dune were planted with different cover levels of Artemisia desertorum.The plant cover average,height of vegetation and crust cover of the different sub-bedding types were investigated,and then their wind erosion thicknesses were measured by in situ brazing and wind erosion modulus calculated;the sand transport rates of the above five sub-bedding types,including creep sediment transport rate and omnidirectional sediment transport rate,were also measured by the sand collector method.The land use types of cultivated land,shrubland and barren grassland were selected to determine their wind erosion sand production thickness at different orientations(north,northeast,east,southeast,south,southwest,west,and northwest)by the wind erosion circle method.[Results]1)The mean monthly wind erosion moduli for mobile dune,semi-fixed dune,fixed dune,shrubland and barren grassland were 6 521.82,5 888.18,6 735.09,6 101.45 and 4 076.91 t/km respectively,with fixed dune being the highest,followed by mobile dune and barren grassland being the lowest.2)The monthly average creep sediment transport rates of mobile dune,semi-fixed dune,fixed dune,shrubland and barren grassland were 0.65,0.71,0.64,0.55 and 0.68 g/(m2·min),and the monthly average omnidirectional sediment transport rates were 2.80,0.82,0.75,0.68 and 0.56 g/(m2·min).The creep sediment transport rates of all sub-bedding types were similar,while the omnidirectional sediment transport rate of mobile dune was significantly higher than those of the other four sub-bedding types.Overall,the rate of sand transport was highest in spring(March to May),when wind erosion was more likely to be evident.3)Cultivated land and barren grassland were dominated by the transport of sand and gravel,while shrubland mainly produced the accumulation of sand and gravel.[Conclusions]A larger area of A.desertorum can suppress wind erosion of sand dunes,and the planting of herbs is more conducive to reducing wind erosion than shrubs,so herbs such as A.desertorum can play a role in the prevention and control of wind erosion and improvement of soil and water resources in the arid and sandy areas of Ningxia.关键词
风蚀/沙蒿/灌木林地/草地/宁夏干旱风沙区Key words
wind erosion/Artemisia desertorum/shrub land/barren grassland/Ningxia arid sand area分类
农业科技引用本文复制引用
杨志,张国军,管凝,任正龑,魏小燕,徐志友,程金花..干旱风沙区不同下垫面及土地利用类型的风力侵蚀特征[J].中国水土保持科学,2025,23(1):109-116,8.基金项目
企事业单位委托科技项目"宁夏水土流失潜在危险性评价研究"(SBZZ-J-2020-09) （SBZZ-J-2020-09）
