干旱区生态环境知识资源中心(Arid): 季节性干旱区紫色土坡耕地土壤水分对降雨的响应

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	季节性干旱区紫色土坡耕地土壤水分对降雨的响应
其他题名	Response of Soil Moisture to Rainfall in Sloping Farmland with Purple Soil in the Seasonal Arid Area
	徐露; 张丹; 向宇国; 陈凡; 陈玉蓝; 黄田钫
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2020
卷号	34 期号:6
中文摘要	以金沙江下游季节性干旱区紫色土坡耕地为研究对象,使用PR2/6土壤剖面水分测定仪和翻斗式雨量计对雨季0100 cm土层的土壤含水量和降雨量进行连续观测,分析雨季紫色土土壤水分对降雨的响应。结果表明:每月平均土壤含水量之间存在显著差异,020 cm土壤含水率表现为9月>8月7月>6月,在整个雨季呈累加上升趋势。降雨量大小是影响土壤水分补给深度的决定因素。小雨(6.4mm)只对10 cm土层土壤水分产生影响,平均提高12.35%;中雨(23mm)对30 cm以上土层土壤水分产生影响,10,20,30 cm分别提高21.16%,17.77%,8.22%;大雨(49mm)和暴雨(112mm)均可影响60 cm以上土层土壤水分,49mm提高7.18% ~31.12%,112mm提高34.12% ~49.18%。040 cm土壤含水量增加量与降雨量和降雨历时在0.01水平上显著相关;020 cm土层土壤含水量增加量与前期干旱天数在0.05水平上显著负相关;3040 cm土层土壤含水量增加量与3天前期累积降雨量呈显著相关。紫色土超过70%的土壤水分存储在60,100 cm土层中,分别占土壤总储水量的15.82%和58.39%。不同土层土壤储水量对降雨的响应规律不同,雨季初期6月030 cm表层土壤储水量变化最大,此时60100 cm深层土壤储水量较为稳定,而79月深层土壤储水量变化幅度大于表层土壤。
英文摘要	Taking the purple soil sloping farmland in the seasonal arid area of the lower Jinsha river as the research object,the PR2/6 soil profile moisture analyzer and tipping rain gauge were used to continuously observe the soil moisture content of 0100 cm soil layers and rainfall during the rainy season,and the purple soil moisture dynamics and its response to rainfall were analyzed.The results showed that there was a significant difference in the monthly average soil moisture content.The soil moisture content of 020 cm was as follows:September>AugustJuly>June,showing an increasing trend throughout the rainy season.The amount of rainfall was the major factor affecting the depth of water supply in soil.Light rain(6.4mm)only affected soil moisture content above 10 cm,which increased 12.35%;moderate rain(23mm)affected soil moisture content above 30 cm,and 10,20,and 30 cm increased by 21.16%,17.77% and 8.22% respectively;heavy rain(49 mm and 112mm)affected soil moisture above 60 cm,49 mm increased by 7.18% ~31.12%,112 mm increased by 34.12% ~49.18%.The increased amount of soil moisture in 040 cm was significantly correlated with the amount of rainfall and rainfall duration at the level of 0.01;meanwhile,the increased amount of soil moisture in 020 cm soil layers was significantly negatively correlated with the drought interval at the level of 0.05;the increased amount of soil moisture in 3040 cm was significantly correlated with the accumulated rainfall in the previous 3 days.More than 70% of the soil water of purple soil was stored in 60 cm and 100 cm soil layers,accounting for 15.82% and 58.39% of the total soil water storage,respectively.The respond of soil water storage in different soil layers to rainfall was different.The soil water storage of 030 cm changed the most in June,the soil water storage of 60100 cm was relatively stable,while the soil water storage of 60100 cm changed more than that of 030 cm from July to September.
中文关键词	降雨 ; 土壤含水量 ; 紫色土 ; 季节性干旱区
英文关键词	rainfall soil moisture content purple soil seasonal arid area
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6870117
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353866
作者单位	徐露, 中国科学院、水利部成都山地灾害与环境研究所;;中国科学院大学, ;;, 成都;;, ;;北京 610041;;100049. 向宇国, 中国科学院、水利部成都山地灾害与环境研究所;;中国科学院大学, ;;, 成都;;, ;;北京 610041;;100049. 张丹, 中国科学院、水利部成都山地灾害与环境研究所, 成都, 四川 610041, 中国. 陈凡, 四川省烟草公司凉山州公司, 西昌, 四川 615000, 中国. 陈玉蓝, 四川省烟草公司凉山州公司, 西昌, 四川 615000, 中国. 黄田钫, 中国科学院成都生物研究所, 成都, 四川 610041, 中国.
推荐引用方式 GB/T 7714	徐露,张丹,向宇国,等. 季节性干旱区紫色土坡耕地土壤水分对降雨的响应[J],2020,34(6).
APA	徐露,张丹,向宇国,陈凡,陈玉蓝,&黄田钫.(2020).季节性干旱区紫色土坡耕地土壤水分对降雨的响应.水土保持学报,34(6).
MLA	徐露,et al."季节性干旱区紫色土坡耕地土壤水分对降雨的响应".水土保持学报 34.6(2020).