干旱区生态环境知识资源中心(Arid): 基于临界起沙风速的草地防风固沙功能研究

Arid

	基于临界起沙风速的草地防风固沙功能研究
其他题名	Research on Sand-fixing Function of Grassland Based on Threshold Wind Velocity
	贺晶; 吴新宏; 杨婷婷; 李鹏
来源期刊	中国草地学报
ISSN	1673-5021
出版年	2013
卷号	35 期号:5 页码:103-107
中文摘要	为了使北方防风固沙生态功能区维持生态健康安全,草地资源适度利用协调发展,选取浑善达克沙地正蓝旗为研究区,利用临界起沙风速法,在植物生长季沿草地一流沙地的过渡带设置了2个样带,每个样带沿不同的盖度梯度设置6个样点。测定每个样点0.5m、2m高度处的风速,并依此计算每个样点的粗糙度,在此基础上计算出各点2m高度处的起沙风速;根据气象资料,获取正蓝旗生长季内可能出现的最大风速,作为正蓝旗的对照风速,以此作为基值与实测的起沙风速进行比较,开展防风固沙功能的研究。结果表明,盖度为34%的草地是防风固沙功能达标区,盖度为24%的草地未到达防风固沙功能。同时,测得浑善达克沙地裸沙地2m高度处的起沙风速为5.47m/s。
英文摘要	To promote sand-fixing ecological function important region in north of China keeping ecology healthy, safe and steady, and make the appropriate utilization of grassland resources with balanced and sustainable development, we take Zhenglan Banner of Hunshandake sandy as a typical instance to carry out research on sand-fixing function of grassland. In our works, using threshold wind velocity method in the growing season. Measure the wind velocity of 50 cm height and 200 cm height of each sampling point, at the same time collect Particle- size and density of topsoil and record the height and coverage and biomass data of each sampling point. Using the wind velocity of 50 cm and 200 cm height to calculate the roughness of each sampling point, then used the particle-size and density of topsoil to calculate the threshold wind velocity of sand movement at which height is 2 m from the ground. According to meteorological data, using the lately 20 years maximum wind velocity in growth season of ZhengLan Banner as the background data, remove the fourth wind velocity then select the fifth highest 10 m/s as the reference wind velocity(it contains 80% potential wind velocity of the growing season). Results showed that the coverage is for 34% of the grassland have sand-fixation function and coverage for 24% of the grass is not arrived sand-fixation function, we measured the threshold wind velocity of sand movement at which height is 2m from the ground of HunShanDaKe is 5.47 m/s, this research can provide reference for desertification grassland’s reasonable use.
中文关键词	防风固沙 ; 粗糙度 ; 临界起沙风速
英文关键词	Sand-fixing Rough degree Threshold wind velocity
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4962562
来源机构	中国农业科学院草原研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230473
作者单位	中国农业科学院草原研究所, 呼和浩特, 内蒙古 010010, 中国
推荐引用方式 GB/T 7714	贺晶,吴新宏,杨婷婷,等. 基于临界起沙风速的草地防风固沙功能研究[J]. 中国农业科学院草原研究所,2013,35(5):103-107.
APA	贺晶,吴新宏,杨婷婷,&李鹏.(2013).基于临界起沙风速的草地防风固沙功能研究.中国草地学报,35(5),103-107.
MLA	贺晶,et al."基于临界起沙风速的草地防风固沙功能研究".中国草地学报 35.5(2013):103-107.