中国农业科学院农业信息研究所 中国农学会
Agricultural Information Institute of CAAS China Association of Agricultural Science Societies
En
Ch
中国农业科学院农业信息研究所 中国农学会 主办

AI检索

订阅

返回顶部
当前位置: 首页 > 文章 > 流动沙丘先锋植物沙米的生态防护作用 水土保持学报 2008,22 (1) 140-145+150
Position: Home > Articles > Ecological Protective Function of A Pioneer Species(Agriophyllum squarrosum) on Shifting Sand Dunes Journal of Soil and Water Conservation 2008,22 (1) 140-145+150

流动沙丘先锋植物沙米的生态防护作用

作  者：
马全林;王继和;张景光;詹科杰;张德魁;陈芳
单  位：
甘肃省荒漠化防治重点实验室甘肃省治沙研究所;中国科学院寒区旱区环境与工程研究所沙坡头沙漠研究试验国家站
关键词：
沙米;先锋植物;生态防护作用;防风固沙作用;输沙率
摘  要：
使用野外风速廓线仪与阶梯式集沙仪,对流动沙丘先锋植物沙米及其群落的生态防护作用进行了野外实地观测研究。研究结果表明,沙米植株成塔状,基部分枝,株高变异性、可塑性大,与其他形态指标呈显著正相关,通过测定株高可掌握其基本形态特征。立枯沙米单株可降低风速90%以上,并能阻挡风沙流形成沙舌,沙舌积沙量、高度、长度与沙米体积、高度和冠幅呈显著相关。沙米群落粗糙度达到6.325 cm,是裸露流沙区的2635倍。在裸露流沙区200 cm高度风速为6.2 m/s时,裸露流沙区输沙量达到86.34 g/cm.h,而沙米群落中无风沙流发生;风速为9.5 m/s时,裸露流沙区输沙量也达到沙米群落的574倍。研究认为,在短期(2~3年)和局部空间范围(流动沙丘坡脚与两翼以及裸沙斑块),立枯沙米及其群落具有较明显的防风固沙作用;发达的生殖生长、侧枝系统和侧根系统,枯死后可保留2~3个生长季,是沙米发挥防风固沙作用的关键所在。
译  名：
Ecological Protective Function of A Pioneer Species(Agriophyllum squarrosum) on Shifting Sand Dunes
作  者：
MA Quan-lin1,2,WANG Ji-he1,ZHANG Jing-guang2,ZHAN Ke-jie1,ZHANG De-kui1,CHEN Fang1 (1.Gansu Key Laboratory of Desertification Combating,Gansu Desert Control Research Institute,Wuwei 733000;2.Shapotou Desert Research and Experiment Station,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000)
关键词：
Agriophyllum squarrosum;pioneer species;ecological protective function;sand break and fixation function;sand flux intensity
摘  要：
By use of the portable anemoscope and vertical array sand traps,the ecological protective function of Agriophyllum squarrosum on the shifting sanddunes were researched in the field.Results showed that A.squarrosum is tower-shaped,ramified near the ground with more branches.Its basic morphologic features can be figured out by height measurement through the empirical equation.Its withered plants can reduce wind velocity more than 90% at most.Sands carried by wind current gradually pileupe and form the sandy tongue of which the volume,height and length have significant positive relation with the volume,height and canopy of A.squarrosum.The roughness of its typical community can reach to 6.325 cm which is 2 635 times as big as the bare shifting sand dune.When wind velocity of 200 cm height on the bare shifting sand dune was 6.2 m/s,sand flux intensity of the bare shifting sand dune reached to 86.34 g/cm·h,but no wind current occurred in its typical community.When wind velocity was 9.5 m/s,sand flux intensity of the bare shifting sand dune reached to 574 times as much as its typical community.So,in short period(2~3 a) and at certain zones,the witherred plants of A.squarrosum and its communites have obvious sand break and fixation functions.It has strong reproductive growth,lateral root system and branch system with the bigger angles(in degrees from the vertical),and its withered plants can keep 2~3 a,which is vital to implement sand break and fixation functions effectively.

相似文章

导出引用
计量
文章访问数: 7
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊

友情链接Friendly link
农业信息研究所Agricultural information institute 农业智能知识服务平台Agricultural intelligent knowledge service platform 农业学术服务平台Agricultural Knowledge Service System 中国知网CNKI 维普网VIP 万方WANFANG DATA
联系我们Contact us

电话Tell：010-82109652-808

邮箱E-mail：agrijournal@caas.cn

服务Service
关于我们About us 意见建议Opinions and suggest
版权说明Copyright
单位：中国农业科学院农业信息研究所 中国农学会 © 2017中国农业科学院农业信息研究所 ICP备案号：京ICP备09089781号-46