干旱区生态环境知识资源中心(Arid): 放牧对典型草原区土壤水分及其对降雨响应规律的影响

Arid

	放牧对典型草原区土壤水分及其对降雨响应规律的影响
其他题名	Effects of Grazing on Soil Moisture and Its Response to Rainfall in Arid and Semi-arid Typical Grassland
	徐冉 1; 张圣微 2; 朱仲元 2; 庞文台 3
来源期刊	中国草地学报
ISSN	1673-5021
出版年	2019
卷号	41 期号:3 页码:59-66
中文摘要	为研究放牧对典型草原区土壤水分及其对降雨响应规律的影响,通过在内蒙古西乌珠穆沁旗设置试验,对禁牧区和放牧区5cm、10cm、15cm、30cm层土壤体积含水率和降雨量进行监测和分析。分析表明:放牧会导致草原地上生物量减少,植被抑制土壤蒸发的作用减弱,降雨转化率降低;放牧会破坏0~15cm层植被根系,根系吸水能力减弱,上层土壤水分向下运移,从而放牧区0~15cm层含水量小于禁牧区,30cm层却大于禁牧区;禁牧区与放牧区5cm、10cm和15cm层土壤水分对降雨的响应相似,单次或累积降雨量大于10mm时,土壤含水量即有显著增加,但会因干旱间隔(两次降雨事件之间无降雨日数)时间的不同而变化,禁牧区含水量更加敏感,增加幅度较大;禁牧区30cm层土壤水分对降雨的响应有滞后现象,单次降雨量大于30mm或累积降雨量大于20mm且干旱间隔时间≤3d时,才有显著增加,放牧区30cm层只在干旱间隔较短(≤2d)的连续大降雨后有明显波动;禁牧区0~30cm层土壤水分的增加都与降雨量、降雨强度极显著相关,放牧区0~15cm层与降雨量极显著相关,0~10cm层与降雨强度极显著相关。
英文摘要	The change of grassland hydrology under the influence of human is the key to grassland ecology and rational utilization of water resources.In order to study the effects of grazing on soil moisture and its response to rainfall in arid and semi-arid typical grassland,the soil moisture content and rainfall in 5cm,10cm,15cm,30cm soil layers of grazing-prohibition and grazing areas were monitored and analyzed by setting up weather stations in West Ujimqin Banner of Inner Mongolia.The results showed that grazing would reduce the above-ground biomass of grassland,weaken the inhibition of vegetation on soil evaporation,shorten the rate of rainfall conversion;Grazing would destroy the root system of vegetation in the 0~15cm layer,weaken the ability of root system to absorb water,and transport the upper soil moisture downward,thus the water content in the 0~15cm layer in the grazing area was less than that in the forbidden grazing area,while that in the 30cm layer was greater than that in the forbidden grazing area;The response of soil moisture in the 5cm,10cm and 15cm layers of the forbidden grazing area and the grazing area to rainfall was similar.When the single or cumulative rainfall was more than 10mm,the soil water content increased significantly,but it was due to the dry interval time (the number of days without rainfall between two rainfall events).The water content in the forbidden grazing area was more sensitive to rainfall and the increase range was greater.The 30cm layer of soil moisture in the grazing area has a hysteresis response to rainfall.When the single rainfall was greater than 30mm or the cumulative rainfall was greater than 20mm,and the drought interval was less than or equal to three days,there was a significant increase.The soil moisture in the 30cm layer of the grazing area increases only fluctuated significantly after the continuous heavy rainfall with short drought interval (≤ 2d).The increase of soil moisture in the 0~30cm layer of the forbidden grazing area was significantly correlated with the rainfall and rainfall intensity.The soil moisture in the 0~15cm layer of the grazing area was significantly correlated with the rainfall,and the 0~10cm layers were significantly correlated with the rainfall intensity.
中文关键词	典型草原 ; 体积含水率 ; 降雨强度 ; 干旱间隔
英文关键词	Typical grassland Soil moisture content Rainfall intensity Drought interval
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:6511153
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/2XILL650/239723
作者单位	1.内蒙古自治区水资源保护与利用重点实验室, 内蒙古自治区水资源保护与利用重点实验室, 呼和浩特, 内蒙古 010018, 中国; 2.内蒙古自治区水资源保护与利用重点实验室;;内蒙古农业大学水利与土木建筑工程学院, 内蒙古自治区水资源保护与利用重点实验室;;, 呼和浩特;;呼和浩特, 内蒙古;;内蒙古 010018;;010018, 中国; 3.内蒙古自治区水利水电勘测设计院, 呼和浩特, 内蒙古 010020, 中国
推荐引用方式 GB/T 7714	徐冉,张圣微,朱仲元,等. 放牧对典型草原区土壤水分及其对降雨响应规律的影响[J]. 内蒙古农业大学,2019,41(3):59-66.
APA	徐冉,张圣微,朱仲元,&庞文台.(2019).放牧对典型草原区土壤水分及其对降雨响应规律的影响.中国草地学报,41(3),59-66.
MLA	徐冉,et al."放牧对典型草原区土壤水分及其对降雨响应规律的影响".中国草地学报 41.3(2019):59-66.