毛乌素沙地不同植被生境下藓类结皮对土壤物理性质的影响  

Effects of moss crusts on soil physical properties for different vegetation habitats in Mu Us sandy land

作　　者：党晓宏 李小乐 蒙仲举 李进 高岩 张泽峰 DANG Xiaohong;LI Xiaole;MENG Zhongju;LI Jin;GAO Yan;ZHANG Zefeng(College of Desert Management,Inner Mongolia Agricultural University,Hohhot 010018;Hangjin Desert Ecological Positioning Observation and Research Station in Inner Mongolia,Ordos 017400;Natural Reserve Workstation of Hangjinqi Forestry and Grassland Administration,Ordos 017400,China)

机构地区：[1]内蒙古农业大学沙漠治理学院,呼和浩特010018 [2]内蒙古杭锦荒漠生态系统国家定位观测研究站,鄂尔多斯017400 [3]杭锦旗林业和草原局自然保护区工作站,鄂尔多斯017400

出　　处：《干旱区资源与环境》2021年第9期158-163,共6页Journal of Arid Land Resources and Environment

基　　金：内蒙古自治区科技重大专项资金项目(zdzx2018058-02);中央引导地方科技发展专项资金计划项目“内蒙古荒漠化防治创新研究中心”资助。

摘　　要：为了探究毛乌素沙地不同植被类型下地表藓类结皮对土壤物理性质影响,文中以3种典型林分(小叶杨、沙柳、沙蒿)内藓类结皮下0~30cm土壤为研究对象,以无藓类结皮样地为对照(CK),对不同林分藓类结皮下土壤粒径组成、土壤含水量和土壤容重的进行测定。结果表明:1)与CK相比,3种典型林分藓类结皮下的土壤粒径组成出现明显细化现象,细砂含量增加了79.14%~180.70%,粉砂含量增加了102.9%~369.57%,其中沙柳林内藓类结皮下土壤粒径细化最为明显。2)3种林分下藓类结皮对5~20cm土壤含水率具有明显的蓄积作用,且以沙柳林蓄水作用最为显著。3)藓类结皮能显著降低表层0~30cm土壤容重3.54%~3.84%,其中沙柳林改善效果最佳。综上所述,藓类结皮对土壤物理性质的影响与植被类型有密切联系,其中沙柳作用效果最好且作用效果主要集中在表层土壤。The aim of the study is to explore the influence of moss crusts on soil physical properties under different vegetation types in Mu Us Desert,Inner Mongolia,China.Soils of 0~30 cm under the moss crusts of three typical stands(Populus microphylla,Salix cheilophila and Artemisia sphaerocephala)were studied,and the moss-free soil was used as the control(CK).The soil particle size composition,soil water content and soil bulk density under moss crusts in different stands were determined.The results demonstrate that:1)The soil texture under three types of vegetation was refined,for this reason,the fine sand increased by 79.14%~180.70%,and the silt increased by 102.9%~369.57%.The mechanical composition of soils in Salix cheilophila ferest was the most obvious.2)Compared with CK,moss crusts had a significant effect on soil particle size,and had the most significant effect on Salix cheilophila forest.3)The accumulation of soil moisture content of 5~20 cm increased due to the coverage of moss crust in three types of vegetation.Among them,the soil moisture accumulation in Salix cheilophila forest was the most significant.4)The soil bulk density from 0~30 cm was reduced,due to moss crust,it was lower by 3.54%~3.84%than CK,and it had the most significantly improvement effect on Salix cheilophila forest.Therefore,the effects of moss crusts on soil physical properties were closely related to vegetation types.Among them,Salix cheilophila forest is affected mostly,and the effects are mainly concentrated on the surface of the soil.

关 键 词：藓类结皮 粒径组成 土壤物理特性 林分类型 毛乌素沙地 

分 类 号：S152[农业科学—土壤学]