干扰程度对巴音温都尔沙漠天然梭梭林表层土壤粒径特征影响的研究  

Study on Influence of Disturbance Degree on The Surface Particle Size Characteristics of Natural Forest of Haloxylon ammodendron in Bayinwenduer Desert

作　　者：郭向东 王树森 罗于洋 温苏雅勒图 张宏武[3] 马迎梅 王健 GUO Xiang-dong;WANG Shu-sen;LUO Yu-yang;Wensuyaletu;ZHANG Hong-wu;MA Ying-mei;WANG Jian(College of the Desert Control Science and Engineering,Inner Mongolia Agricultural University/The Key Laboratory of Desert Ecosystem Conservation and Restoration,State Forest Administration,Hohhot 010011,China;Forestry Bureau of Urad Rear Banner,Bayannur,Inner Mongolia,Urad Rear Banner 015500,China;Institute of Forestry Science of Bayannur,Inner Mongolia,Bayannur 015000,China)

机构地区：[1]内蒙古农业大学沙漠治理学院/国家林业局荒漠生态系统保护与修复重点实验室,内蒙古呼和浩特010011 [2]内蒙古乌拉特后旗林业局,内蒙古乌拉特后旗015500 [3]内蒙古巴彦淖尔市林业科学研究所,内蒙古巴彦淖尔015000

出　　处：《内蒙古林业科技》2019年第4期35-38,42,共5页Journal of Inner Mongolia Forestry Science and Technology

基　　金：乌拉特国家级自然保护区自研项目“乌拉特国家级自然保护区主要沙生灌木群落生态服务功能研究”(WLTBR2018001)资助

摘　　要：土壤粒度特征是反映土壤质地的重要属性之一。为了弄清不同干扰程度对巴音温都尔沙漠梭梭林表层土壤粒径特征的影响,本文对不同干扰程度的巴音温都尔沙漠梭梭林下表层土壤进行采样实测,分析了巴音温都尔沙漠梭梭树下表层土壤粒度特征。结果表明:不同干扰程度下梭梭林下土壤中极细砂含量百分比最高,且自然状态样地极细砂含量为56.86%,轻度干扰样地为44.15%,中度干扰样地为34.25%;中砂含量百分比随干扰程度的增加而增加,自然状态样地为7.94%,轻度干扰样地为18.75%,中度干扰样地为31.00%。中等干扰样地平均粒径为2.19 mm,轻度干扰程度为2.53 mm,自然状态下为2.94 mm。自然、轻度干扰、中度干扰状态下分选系数平均值分别为-0.78、-1.00、-0.79。偏度为轻度<中度<自然,均属负偏;峰度平均值分别为1.10、1.79、1.18,分别属中等、很窄和窄峰态。植被保护使梭梭林能够有效降低风速,增加土壤表层较细颗粒物含量。Soil granularity is one of the important attributes reflecting soil texture. In order to find out the influence of different disturbance degree on the surface soil particle size characteristics of Haloxylon ammodendron forest in Bayinwenduer Desert, the surface soil under Haloxylon ammodendron forest was sampled and measured, and the surface soil particle size characteristics were analyzed. The results showed: The percentage of ultra-fine sand in the soil under Haloxylon ammodendron forest was the highest under different disturbance degrees, and it was natural(56.86%) > mild(44.15%) > moderate(34.25%). The percentage of medium sand increased with the increase of disturbance degree, natural(7.94%) < mild(18.75%) < moderate(31.00%). The average particle size was moderately disturbance degree(2.19 mm) < mild interference degree(2.53 mm) < natural state(2.94 mm). Average sorting coefficients under natural, mild and moderate interference conditions were-0.78,-1.00 and-0.79 respectively. The order o f skewness was slight < moderate < natural, belonging to negative bias. The average peaks were 1.10, 1.79 and 1.18, respectively, belonging to medium, very narrow and narrow peaks. Vegetation protection can effectively reduce wind speed and increase fine particles in surface soil of Haloxylon ammodendron forest.

关 键 词：巴音温都尔沙漠 梭梭 粒度 不同干扰程度 

分 类 号：S718.5[农业科学—林学]