干旱区生态环境知识资源中心(Arid): 裸露耕地风沙运动特性试验研究

Arid

	裸露耕地风沙运动特性试验研究
其他题名	Characteristic of Wind-Sand Movement on Bare Tillage
	申向东; 邹春霞
来源期刊	农业环境科学学报
ISSN	1672-2043
出版年	2005
卷号	24 期号:5 页码:909-912
中文摘要	以内蒙古阴山北部的典型农牧交错带耕地为试验区,利用手持式风速仪测定风速,JY222型地温仪测定地温,SC-I型集沙仪测定风蚀量,通过观测不同风速下的风蚀情况,获得裸露耕地风沙运动规律的参数--沙粒的起风速度、沙粒沿高度变化、风速、风蚀量的基本资料,详尽地分析了裸露耕地风沙运动的影响因素及运动特征.结果表明,耕地风沙运动与沙漠风沙运动不同,得出了耕地风沙运动的基本特性和运动规律.
英文摘要	The north Yin Mountain of Inner Mongolia is one of the most serious wind erosion places. The experimental field lies in E, N and an altitude of 1 490.70 m, located in west north of Siziwang County in this region. It is a typical ecotone between agri-culture and animal husbandry with monsoon climate. The wind velocity, the soil temperature and the amount of soil erosion were measured by portable anemometer, JY222-geothermomeler and SC-I sediment collector, respectively. The parameters stating the law of wind-sand movement, such as the particle threshold velocity, particle size distribution in height, wind velocity and amount of wind erosion, were determined by measuring the soil loss in different wind speed, the factors and characteristics of wind-sand movement were analyzed on bare tillage. The field experiment showed the particle (0.25 mm) threshold velocity at a height of lm was 9.5 nvs~’. The distribution of wind erosion sand in height could be expressed as exponential form, based on the statistical analysis for the amount of windblown sand in different heights collected by three sediment collector in three fields in March 27, 2004. The sediment reduced with the increase of height as exponential function. 31.65% of the whole soil loss was carried away by the wind within a height of 0 to 5 cm, 41.2% within a height of 0 to 10 cm, showing the wind erosion of soil by a transport pro-cess occurred within 10 cm topsoil. The distribution law of wind speed variation and the probability density function for maximum wind speed was analyzed according to maximum entropy principle and the data collected from March 5 to April 15 in 2004. The difference in wind-sand movement between the bare tillage and the desert was compared. This fundamental characteristics and mechanics movement law of wind-sand laid foundations for dynamic wind-sand movement characteristic of bare tillage.
中文关键词	风蚀量 ; 风沙运动 ; 耕地
英文关键词	amount of wind erosion wind-sand movement tillage
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:2040307
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/206480
作者单位	内蒙古农业大学, 呼和浩特, 内蒙古 010018, 中国
推荐引用方式 GB/T 7714	申向东,邹春霞. 裸露耕地风沙运动特性试验研究[J]. 内蒙古农业大学,2005,24(5):909-912.
APA	申向东,&邹春霞.(2005).裸露耕地风沙运动特性试验研究.农业环境科学学报,24(5),909-912.
MLA	申向东,et al."裸露耕地风沙运动特性试验研究".农业环境科学学报 24.5(2005):909-912.