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北方农牧交错带缓坡耕地土壤风蚀特征
引用本文:康玉梅,常春平,王仁德,李赞.北方农牧交错带缓坡耕地土壤风蚀特征[J].水土保持学报,2012,26(5):55-58.
作者姓名:康玉梅  常春平  王仁德  李赞
作者单位:1. 河北师范大学资源与环境科学学院/河北省环境演变与生态建设省级重点实验室,石家庄,050024
2. 河北省科学院地理科学研究所,石家庄,050011
3. 河北师范大学化学与材料科学学院,石家庄,050024
基金项目:国家自然科学基金青年项目(41101251);河北省自然科学基金项目(2008000183)
摘    要:研究采用野外观测手段对不同坡向和坡位的土壤风蚀特征进行测定和分析。结果表明:①缓坡耕地不同地形部位,风速随地形升高而增大,主要由于微地形作用,使南坡风速略高于北坡。②土壤风蚀量随风速变化呈现出指数函数变化趋势,风速增大则风蚀量也增大。③以坡顶为对称轴,北坡和南坡的风蚀量基本呈对称分布,北坡风蚀量占南坡风蚀量的88.6%;5个地形部位的风蚀量相比,最大值并非出现在坡顶部位。④坡中和坡底在0~6cm高度范围内,坡顶在0~8cm高度范围内,随高度和风速增加,风蚀量呈线性增大;在8~60cm高度范围内,风蚀量随高度增加呈现出负指数函数递减的规律,6cm<高度<20cm递减率较大,高度>20cm递减率较小。

关 键 词:北方农牧交错带  缓坡耕地  土壤风蚀

Soil Wind Erosion Characteristics of Hilly Farmland with Gentle Slope at Crisscross Area of Agriculture and Pasture in the North
KANG Yu-mei,CHANG Chun-ping,WANG Ren-de,LI Zan.Soil Wind Erosion Characteristics of Hilly Farmland with Gentle Slope at Crisscross Area of Agriculture and Pasture in the North[J].Journal of Soil and Water Conservation,2012,26(5):55-58.
Authors:KANG Yu-mei  CHANG Chun-ping  WANG Ren-de  LI Zan
Institution:1.College of Resource and Environment Sciences/Hebei Key Laboratory of Environmental Change and Ecological Construction,Hebei Normal University,Shijiazhuang 050024;2.Institute of Geographical Sciences,Hebei Academy of Sciences,Shijiazhuang 050011;3.College of Chemical and Materials Science,Hebei Normal University,Shijiazhuang 050024)
Abstract:The thesis studied on soil erosion characteristics in different slope aspects and position by the means of field observation.The results show that(1)Wind speed increased with the terrain rising in different terrain parts of hilly farmland with gentle slope.Mainly due to the role of micro-topography,the southern slope of the wind speed slightly higher than the northern slope.(2)Amounts of soil wind erosion and wind speed showed the variation of the exponential function.Amounts of soil wind erosion increased with wind speed rising.(3)Axis of symmetry to the top of the hill,the wind erosion of the north slope and the southern slope was a symmetrical distribution.The southern slope of wind erosion was slightly larger than the north slope.North slope erosion amount accounted for 88.6% of the southern slope.Wind erosion amounts compared to the five terrain position,maximum values did not appear in the top positions.(4)The wind erosion amount increased with height and wind speed in the height of 0~6 cm in the middle and bases of slope and 0~8 cm in the top of the slope.Wind erosion quantity with height increase showed the law of a negative exponential function in the height of 8~60 cm.When the height was bigger than 6 cm and smaller than 20 cm,lapse rates was greater.When the height was more than 20 cm,lapse rates was smaller.
Keywords:crisscross area of agriculture and pasture in the North  hilly farmland with gentle slope  soil wind erosion
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