干旱区生态环境知识资源中心(Arid): 土地利用对河西走廊荒漠绿洲区土壤入渗的影响

Arid

	土地利用对河西走廊荒漠绿洲区土壤入渗的影响
其他题名	Effect of land use on soil infiltration in the desert-oasis of Hexi Corridor
	孙程鹏; 赵文智
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2021
卷号	41 期号:6 页码:148-156
中文摘要	绿洲是由农田、林地、沙荒地、湖泊和湿地等多种景观组成的镶嵌体,农田、林地、沙荒地是该镶嵌体的主要组成部分。探究不同土地利用土壤入渗特征对深入了解绿洲内部水循环和水转化具有重要意义。本文研究了农田、防护林地和沙荒地3种土地利用方式0-40 cm土层土壤物理性质及入渗特征,探讨不同土地利用对土壤入渗特征的影响及其驱动机制。结果表明:(1)不同土地利用土壤质地差异显著,较沙荒地,防护林地和农田0-40 cm土层土壤黏粉粒含量分别增加了100.25%和285.23%,土地利用对干密度和总孔隙度影响较小,仅防护林地表层(0-10 cm)干密度减小(1.370.12 g·cm~(-3))、总孔隙度增大(48.22%4.56%);(2)不同土地利用方式土壤入渗性能存在显著差异,与沙荒地相比,农田和防护林地土壤初始入渗率分别减小了75.49%和37.05%,饱和导水率分别减小了80.04%和42.02%;(3)不同土地利用方式显著影响土壤水流模式,防护林地和农田土壤水流入渗非均匀性显著高于沙荒地,其优先流比分别是沙荒地土壤的3.84倍和5.46倍;(4)土壤初始入渗率和饱和导水率与黏粉粒含量显著负相关,优先流比和长度指数与黏粉粒含量和总孔隙度显著正相关,土壤入渗性能和水流模式均受土壤质地的影响,表明土壤质地是土地利用对土壤入渗影响的关键因子。
英文摘要	Oases are a complex mosaic of various landscapes such as cropland,woodland,desert land,lake and wetland.As the major component of oases,it is necessary to examine soil infiltration under these land use types as well as related factors among cropland,woodland and desert land,this is of great significance for understanding the water cycle and transformation in oases.To explore the effects of land use types on soil infiltration characteristics and related mechanisms in the desert-oasis of Hexi Corridor,dyeing Beerkan infiltration experiments and soil samples of 0-40 cm soil layers were conducted.The results showed that:(1)there was a significant difference between the three land use types,compared with desert land,silt and clay contents of 0-40 cm soil layers in protection forest and cropland sites increased by 100.25% and 285.23%,respectively;But land use types had little effect on dry density and total porosity,only dry density of surface layer(0-10 cm)in protection forest decreased(1.370.12 g·cm~(-3))and the total porosity increased(48.22%4.56%).(2)Soil infiltration capacities also varied,compared to desert land sites,the initial infiltration rate in protection forest and cropland sites decreased by 75.49% and 37.05%,respectively,on the other hand,the saturated hydraulic conductivity decreased by 80.04% and 42.02%,respectively.(3)Land use types significantly affected soil water flow patterns,the heterogeneity of soil infiltration in protection forest and cropland sites was significantly stronger than that in desert land sites,the macropore flow fraction in protection forest and cropland sites was 3.84 times and 5.46 times higher than that in desert land sites.(4)A significant negative correlation was found between the initial infiltration rate and saturated hydraulic conductivity and soil silt and clay contents,while the macropore flow fraction and length index and soil silt and clay contents and total porosity demonstrated a significantly positively correlation,indicating soil infiltration capacities and water flow patterns were affected by soil texture and soil texture was the critical regulator in soil infiltration response to land use types.
中文关键词	绿洲 ; 土地利用 ; 土壤入渗性能 ; 土壤水流模式
英文关键词	oases land use soil infiltration capacities soil water flow patterns
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:7117528
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/378116
作者单位	孙程鹏, 中国科学院西北生态环境资源研究院;;中国科学院大学, 中国科学院临泽农田生态系统国家野外科学观测研究站/临泽内陆河流域研究站;;, 兰州;;, 甘肃;;北京 730000;;100049, 中国.; 赵文智, 中国科学院西北生态环境资源研究院, 中国科学院临泽农田生态系统国家野外科学观测研究站/临泽内陆河流域研究站, 兰州, 甘肃 730000, 中国.
推荐引用方式 GB/T 7714	孙程鹏,赵文智. 土地利用对河西走廊荒漠绿洲区土壤入渗的影响[J],2021,41(6):148-156.
APA	孙程鹏,&赵文智.(2021).土地利用对河西走廊荒漠绿洲区土壤入渗的影响.中国沙漠,41(6),148-156.
MLA	孙程鹏,et al."土地利用对河西走廊荒漠绿洲区土壤入渗的影响".中国沙漠 41.6(2021):148-156.