水土保持学报2018，Vol.32Issue(2)：104-109,119,7.DOI:10.13870/j.cnki.stbcxb.2018.02.016
风蚀作用下农田土壤细颗粒的粒度损失特征及其对土壤性质影响
Loss Characteristics of Fine Particles by Wind in Farmland and Its Effect on Soil Properties
摘要
Abstract
The wind erosion of farmland in the agro-pastoral acetone of northern China is very serious,which causes degradation of soil resources.Taking Bashang district as a typical area of agro-pastoral acetone,by field sampling and comparing the differences in soil properties between farmland and nearby natural grassland,the loss characteristics of fine particles in farmland soils led by wind erosion as well as its impact on soil physical and chemical properties were studied in the paper.The results showed that,compared with natural grasslands with weak wind erosion,the contents of clay and silt in farmlands decreased by 30％ and 14％,respectively.The grain sizes of lost soil concentrated in 0～40 μm,of which the loss of fine particles with sizes of 1.8～24.0 μm was the largest.The loss of fine particles in farmland soils resulted in the increase of sand and gravel in farmland soils by 7％ and 75％,respectively,also the averaged particle size of soil increased 16％.Those indicate that the farmland soils have serious tendency of coarsening and desertification under the long-time effect of wind erosion.With the loss of fertile fine particles,the soils of farmland became barren.The results showed that the contents of carbon (C) and total nitrogen (N) in farmland soils decreased significantly,with a declining range of about 29％ and 24％,respectively.The ratio of C to N (C/N) also declined obviously and the content of soil fertility reduced.However,the loss of fine particles had no significant influence on the proportion of erodible particles in soil.The change of soil erodibility by wind was not obvious in farmland soils.关键词
农田风蚀/细颗粒损失/土壤理化性质/风蚀可蚀性/河北坝上Key words
wind erosion of farmland/the loss of fine particles/soil property/soil erodibility by wind/Bashang district of Hebei Province分类
农业科技引用本文复制引用
苑依笑,王仁德,常春平,郭中领,李庆..风蚀作用下农田土壤细颗粒的粒度损失特征及其对土壤性质影响[J].水土保持学报,2018,32(2):104-109,119,7.基金项目
国家自然科学基金项目(40110251,41330746,41630747) （40110251,41330746,41630747）
河北省自然科学基金项目(D2013302034,D2014205063) （D2013302034,D2014205063）
河北省科学院科技计划项目(17103) （17103）
