冻结对不同土壤湿度风沙土风蚀影响研究  

Effect of Freezing on Wind Erosion of Aeolian Soil under Different Soil Moisture

作　　者：阿比亚斯 李锦荣[1] 赵纳祺 陈晓娜 Abiyasi;LI Jin-rong;ZHAO Na-qi;Chen Xiao-na(Institute of Water Resources for Pastoral Area of the Ministry of Water Resources of China,Hohhot 010020,China;Forestry Experimental Center of Desert,Chinese Academy of Forestry,Dengkou 015200,China)

机构地区：[1]水利部牧区水利科学研究所,内蒙古呼和浩特010020 [2]中国林业科学研究院沙漠林业试验中心,内蒙古磴口015200

出　　处：《内蒙古林业科技》2022年第2期7-12,共6页Journal of Inner Mongolia Forestry Science and Technology

基　　金：内蒙古自然基金(2019MS04001)。

摘　　要：为探究乌兰布和沙漠黄河段区域沙丘土壤冻结后风蚀变化规律,制作不同土壤含水量(2%、4%、6%)沙盘,并以干燥风沙土(含水量0.02%)为对照,在冻结状态和非冻结状态下对沙盘的风蚀量和水分损失量进行对比研究。结果表明:(1)无论是冻结状态还是非冻结状态下,平均风速相同时,风蚀量和水分损失量均随土壤含水量的增加呈下降趋势,其风蚀量与水分损失量大小排序为:CK>2%>4%>6%。土壤水分能够有效抑制风蚀,且含水量越高,抑制程度越明显。(2)土壤冻结显著增加了土壤抗蚀性,冻结较非冻结土壤风蚀量可降低2.6%~25.6%,当土壤含水量为6%时,这种差异性不显著。(3)相同土壤含水量下,冻结与非冻结状态土壤水分损失率无显著差异。冬季沙丘表面形成的土壤冻结层可以减少沙丘冻土层的侵蚀。In order to explore the effect of freezing on wind erosion of the Yellow River in Ulan Buh Desert section,the amount of wind erosion and water loss in frozen and non-frozen states in sand trays with different soil moisture contents(2%,4%,6%)was investigated,taking dry aeolian sand(moisture content at 0.02%)as the control.The results showed:(1)In frozen or unfrozen state,wind erosion and water loss decreased with the increase of soil moisture,with an order of CK>2%>4%>6%.Soil moisture could effectively inhibit wind erosion,and the ability to inhibit wind erosion increased with the increase of water content.(2)Frozen soil significantly increased soil erosion resistance,and the amount of wind erosion in frozen soil could be reduced by 2.6%-25.6%compared to non-frozen soil.There was no significant difference in soil erosion resistance when soil water content was 6%.(3)Under the same water content,there was no significant difference in water loss rate between frozen and unfrozen state.The soil freezing layer formed on the dune surface in winter could reduce the erosion of sand dune permafrost layer.

关 键 词：土壤含水量 风蚀量 冻结期 乌兰布和沙漠 

分 类 号：S157.1[农业科学—土壤学]