毛乌素沙地沙柳沙障破损规律与植被恢复的研究  

Damage Law and Vegetation Restoration of Salix psammophila Sand Barrier in Mu Us

作　　者：王瑞东 党晓宏 高永 杨霞 张超 李婉娇 Wang Ruidong;Dang Xiaohong;Gao Yong;Yang Xia;Zhang Chao;Li Wanjiao(College of Desert Control Science and Engineering, Inner Mongolia Agricultural University, Hohhot Inner Mongolia 010018, China;Inner Mongolia Hangjin Desert Ecological Position Research Station, Ordos Inner Mongolia 017400, China)

机构地区：[1]内蒙古农业大学沙漠治理学院,内蒙古呼和浩特010018 [2]内蒙古杭锦荒漠生态系统国家定位观测研究站,内蒙古鄂尔多斯017400

出　　处：《西南林业大学学报（自然科学）》2019年第3期71-77,共7页Journal of Southwest Forestry University：Natural Sciences

基　　金：国家自然科学基金项目(41861044)资助;内蒙古农业大学高层次人才引进科研启动项目(NDYB2016-08)资助

摘　　要：以毛乌素沙地东南缘巴图塔境内的流动沙丘上铺设的沙柳沙障为研究对象,采用野外调查和统计分析相结合的方法,分析了沙柳沙障的破损情况以及沙柳沙障对植被恢复的作用。结果表明:沙柳沙障铺设5 a后破损程度严重,平均破损度达到52.89%,沙丘背风坡的沙柳沙障破损程度较迎风坡严重,同一障格不同障边的破损程度表现为迎风边>顺风边;2 m×2 m规格的沙障植被恢复效果优于1 m×1 m规格的沙障,表明在流动沙丘上铺设沙柳沙障能够有效地促进植被恢复,植物多样性与沙障设置年限基本呈正相关关系;风力掏蚀是导致迎风坡沙柳沙障破损的主要影响因子,坡度和压埋是导致背风坡沙柳沙障破损的主要影响因子。The study was conducted to research the Salix psammophila barrier set on the mobile dunes in batumu, Southeast of the Mu Us Sandy Land. A large amount of filed investigation and statistical method were adopted to reveal the damage of the S. psammophila barrier in different specifications, slops and boundaries and vegetation restorations. Relationships between vegetation growth and barrier damage were analyzed. Restles show that average damage degree of the sand and sand barrier is 52.89% after 5 years of sand barrier laying, and the vegetation restoration ability of 1 m×1 m sand barrier is worse than that of 2 m×2 m sand barrier. The damage degree of sand barrier laid in different landforms of the dune is from strong to weak as follows: the sorting of dune at the top of the central > leeward slope > Leeward slope > windward slope bottom > windward slope in the upper. The damage degree of different sides of the same barrier in S. psammophila sand-barrier is as follows: windward below > windward above > left before the wind > right before the wind. The damage degree of the sand barrier right side is negative correlated with the vegetation coverage. The greater the extent of the damage, the smaller the vegetation coverage and it affects the natural restoration capacity of vegetation. Gravity (slope) and sand burying are the main factors causing the damage of S. psammophila barriers, and the S. psammophia barriers plays an important facilitating role in the recovery of vegetation in the flowing sand dunes.

关 键 词：破损规律 流动沙丘 植被恢复 

分 类 号：S727.22[农业科学—林木遗传育种]