干旱区生态环境知识资源中心(Arid): 风速及刈割对草原土壤水分与生产力的影响

Arid

	风速及刈割对草原土壤水分与生产力的影响
其他题名	Impacts of Wind Speed and Mowing on Soil Moisture and Productivity in Steppe
	金东艳; 高琼
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2015
卷号	32 期号:3 页码:461-466
中文摘要	由于全球气候变化与人类干扰的共同影响,全球范围内出现了不同程度的风速下降的现象。试验在内蒙古半干旱草原利用挡风板模拟风速降低,采用不同程度刈割模拟草原利用强度的变化,实地监测近地表土壤水分吞吐量以及群落再生能力的变化。结果表明:挡风板能够有效地降低风速; 风速下降在一定程度有助于抑制土壤水分的蒸发损失,提高刈割处理后植物的再生能力。风速降低对内蒙古半干旱草原生态系统综合表现为正效应。加入刈割处理后,风速降低在一定程度上缓解了刈割对草原生态系统的干旱胁迫,但风速降低未能改变刈割处理的影响。
英文摘要	As a result of combined impact of global climate change and anthropogenic disturbance,global wind speed has been found to decrease to different extent. The decrease of the wind speed increases the surface boundary layer thickness,reduces the heat and moisture exchange rate,changes the near-surface micro climate,and reduces the wind erosion,which affects plant growth and other ecosystem processes. The climate characteristic is strong wind,little rainfall,high evaporation and strong solar radiation in Inner Mongolia grassland. Because of the unreasonable land utilization way such as overgrazing and farming all throughout the year,Inner Mongolia grassland ecosystem has strong sensitivity of natural and human disturbance. In this study,we simulated reduced wind speed with wind deflector installed in semi-arid grassland,simulated grassland utilization intensity variation through different mowing intensity,and monitored variation of near surface soil moisture input and output and community regeneration. The result showed that the wind deflector could reduce wind speed effectively; the reduced wind speed could contribute to restrain the soil moisture evaporation loss,improve the regeneration capacity after the mowing conduction; so wind speed reduction manifested positive effect on semi-arid grassland ecosystem in Inner Mongolia. Combined with mowing conduction,wind speed reduction could relieve the drought stress of mowing on grassland ecosystem to certain extent,but wind speed reduction could not change the impact of mowing conduction.
中文关键词	风速 ; 刈割 ; 土壤水分 ; 草原生态系统 ; 内蒙古
英文关键词	wind speed mowing soil moisture grassland ecosystem Inner Mongolia
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:5433749
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232714
作者单位	北京师范大学, 地表过程与资源生态国家重点实验室, 北京 100875, 中国
推荐引用方式 GB/T 7714	金东艳,高琼. 风速及刈割对草原土壤水分与生产力的影响[J]. 北京师范大学,2015,32(3):461-466.
APA	金东艳,&高琼.(2015).风速及刈割对草原土壤水分与生产力的影响.干旱区研究,32(3),461-466.
MLA	金东艳,et al."风速及刈割对草原土壤水分与生产力的影响".干旱区研究 32.3(2015):461-466.