干旱区生态环境知识资源中心(Arid): 黄土高原恢复草地土壤水分对降水响应及模拟

Arid

	黄土高原恢复草地土壤水分对降水响应及模拟
其他题名	Modeling of the response of soil moisture to precipitation in the restored grasslands of the Loess Plateau
	邹慧; 高光耀; 朱斌; 刘丹一; 杨文斌
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2020
卷号	37 期号:4
中文摘要	降水是干旱半旱地区土壤水分的主要来源,对该区植被恢复具有重要意义。本文采用EC-5土壤水分传感器对20142015年0~120 cm土壤水分进行连续监测,研究了退耕后不同恢复年限草地土壤水分动态变化及其0~40 cm土壤10 min时间尺度土壤水分对降水的响应。结果表明:土壤水分从恢复5 a草地向恢复15 a草地逐渐降低,这种降低趋势在恢复30 a草地减弱。恢复5 a草地土壤水分增幅最小,响应次数最少。单次降雨事件中,土壤水分增长过程和衰减过程均符合Logistic模型。恢复5 a草地相对稳定期(平台期)历时最长;恢复15 a草地土壤水分在表层(0~5,5~10 cm)增速最快,而在下层(20~40 cm)增速减慢且响应时间滞后;恢复30 a草地在下层(20~40 cm)增速最快。建议对恢复草地应适当采取措施,促进降雨向深层土壤水分转化,并减少恢复初期平台期历时。
英文摘要	Temporal variation in soil moisture and its response to precipitation are critically important for the growth of vegetation and ecological restoration in arid and semi-arid areas.Hence,we analyzed soil moisture dynamics and their response to rainfall on a 10 min timescale with EC-5 real-time soil moisture monitoring sensors in naturally restored grasslands of different restoration ages(5,15,and 30 years;RG5,RG15,and RG30,respectively).The results showed that soil moisture was high in RG5,decreased in RG15,and finally stopped decreasing in RG30.RG5 was characterized by lower response frequency and smaller response amplitude over two years with similar amounts of rainfall.The process of variation in soil moisture during a single heavy rainfall event can be divided into three periods:the rising period,the steady period,and the decreasing period,which is consistent with the logistic growth and decline model.The duration of the steady period in RG5 was greatest in each layer of the upper soil(0-40 cm).The response of RG15 was the most significant in the surface soil layer(0-5,5-10 cm),but there was an obviously lagged response in the 20-40 cm layer.Meanwhile,the response of RG30 was the most significant in the 20-40 cm soil layer.Our results indicate that the utilization of limited rainfall could be improved by promoting the conversion of rainfall to soil moisture in deep soil layers and by reducing the duration of the steady period or plateau period in the earlier restoration stage.
中文关键词	恢复草地 ; Logistic模型 ; 降水响应 ; 土壤水分 ; 黄土高原
英文关键词	restored grassland Logistic model response to precipitation soil moisture Loess Plateau
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6834389
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353520
作者单位	邹慧, 中国林业科学研究院;;中国治沙暨沙业学会, ;;, ;;, 北京;;北京 100091;;100714, 中国. 高光耀, 中国科学院生态环境研究中心, 城市与区域生态国家重点实验室, 北京 100085, 中国. 朱斌, 中国治沙暨沙业学会, 北京 100714, 中国. 刘丹一, 中国治沙暨沙业学会, 北京 100714, 中国. 杨文斌, 中国林业科学研究院, 北京 100091, 中国.
推荐引用方式 GB/T 7714	邹慧,高光耀,朱斌,等. 黄土高原恢复草地土壤水分对降水响应及模拟[J],2020,37(4).
APA	邹慧,高光耀,朱斌,刘丹一,&杨文斌.(2020).黄土高原恢复草地土壤水分对降水响应及模拟.干旱区研究,37(4).
MLA	邹慧,et al."黄土高原恢复草地土壤水分对降水响应及模拟".干旱区研究 37.4(2020).