榆林沙地防护林退化原因分析  

Analysis on the Causes of Degradation of Protective Forest in Yulin Sandy Land

作　　者：高天健 GAO Tian-jian(Forestry College,Northwest University of Agriculture and Forestry Science and Technology,Yangling,Shaanxi 712100)

机构地区：[1]西北农林科技大学林学院,陕西杨凌712100

出　　处：《安徽农业科学》2023年第8期124-127,共4页Journal of Anhui Agricultural Sciences

基　　金：陕西省林业科学院创新团队项目“退化防护林更新技术研究”(SXLK2020-0307);陕西省林业科学院科技创新计划“揭榜挂帅”专项“白于山区困难立地生态修复技术研究与示范”(SXLK2021-0104);榆林市科技计划项目“毛乌素沙地二次沙化阻控关键技术研究”(YT-2022-9)。

摘　　要：通过查阅文献和野外调查相结合的方法,分析了榆林风沙区飞播灌木林的现状及其退化原因。结果表明:榆林沙区防护林的退化原因与立地条件、气候条件、经营管理有关。通过分析不同立地类型同种植物的生长势,同种立地类型不同植物的生长量以及防护林退化和演替方向,发现杨柴(Hedysarum mongolicum Turez)和蒙古虫实(Corispermum mongolicum)更适宜生长在迎风坡,沙蒿和狗娃花更适合生长在丘间地和坡底。丘间地灌木生长适宜性从高到低依次为沙打旺、沙蒿、柠条,缓坡依次为柠条、沙蒿、沙打旺,平沙地依次为沙打旺、柠条、沙蒿。Based on literature review and field investigation,this study analyzed the current situation and causes of degradation of aerial seeded shrubbery in Yulin sandy area.The results showed that the causes of degradation of protective forests were related to site conditions,climatic conditions,and management.Based on the study of the growth potential of the same plant in different site types,the growth amount of different plants in the same site type,and exotic species,it was found that Hedysarum mongolicum Turez and Corisperum mongolicum were more suitable for growing on the windward slope,Artemisia mongolicum,and Gowardeshoe were more suitable for growing on the inter hilly land and the bottom of the slope.The shrub growth suitability in the hilly land is in the order of Astragalus adsurgens,Artemisia mongolica,and Caragana microphylla from high to low,while in the gentle slope,it is in the order of Caragana microphylla,Artemisia mongolica,and Astragalus adsurgens,while in the flat sandy land,it is in the order of Astragalus adsurgens,Caragana microphylla,and Artemisia microphylla.

关 键 词：榆林沙区 防护林 退化 立地类型 

分 类 号：S727.2[农业科学—林木遗传育种]