高寒沙地不同年限拧条林下植被与土壤性质变化特征  

CHANGES IN VEGETATION AND SOIL PROPERTIES UNDER DIFFERENT AGE GROUPS OF CARAGANA KORSHINSKII FORESTS IN HIGH-ALTITUDE SANDY AREAS

作　　者：张润琳 妥万花 李国刚[1,2] 刘泽华 ZHANG Run-lin(College of Life Sciences,Qinghai Normal University,Xining Qinghai 810008,China)

机构地区：[1]青海师范大学生命科学学院,青海西宁810008 [2]青海省青藏高原生物多样性形成机制与综合利用重点实验室,青海西宁810008

出　　处：《青海草业》2024年第4期15-21,75,共8页Qinghai Prataculture

摘　　要：为了解种植拧条对沙地次生植被和土壤理化性质的影响,本研究以青海省治沙试验站不同时期的拧条林为研究对象,探究其林下植被和土壤理化性质的特征。结果表明:随林龄增加,林下植物多样性呈“升高-降低-升高”的趋势,林下草本优势种由一年生苋科植物演替为多年生菊科和豆科植物。种植拧条能够显著降低沙地表层土壤pH值和含水量,种植30 a以上的拧条林显著提高土壤有机质含量和碱解氮含量(P<0.05)。To understand the effects of planting Caragana korshinskii on secondary plants and soil physicochemical properties in sandy areas,this study focuses on the characteristics of understory vegetation and soil physicochemical properties in different periods of Caragana korshinski forests at the Shazhuyu Sand Control Experimental Station in Gonghe County.The results showed that with the increase of forest age,the diversity of understory plants shows a trend of"increase decrease increase",and the dominant species of understory herbaceous plants have evolved from annual amaranth plants to perennial Asteraceae and leguminous plants.Planting Caragana korshinskii can significantly reduce the pH and moisture content of the surface soil in sandy areas,while planting Caragana korshinski forests for more than 30 years significantly increases soil organic matter content and alkaline nitrogen content(P<0.05).

关 键 词：高寒沙地 拧条 植被 土壤 

分 类 号：S718.5[农业科学—林学] S714.8