干旱区生态环境知识资源中心(Arid): 干湿交替对红河干旱河谷区土壤优先流形成特征的影响

Arid

	干湿交替对红河干旱河谷区土壤优先流形成特征的影响
其他题名	Influence of alternated drying and wetting on the characteristics of soil preferential flow formation in Honghe Arid Valley
	万艳萍; 赵洋毅; 段旭; 王克勤; 朱梦雪; 卢华兴; 涂晓云; 杜云祥
来源期刊	应用生态学报
ISSN	1001-9332
出版年	2021
卷号	32 期号:7 页码:1001-9332
中文摘要	为明确干旱河谷气候区干湿交替作用对土壤优先流形成的影响,本研究以红河干旱河谷区的荒草地为对象,通过模拟干湿交替的方法,基于染色示踪和水分穿透曲线试验并利用图像处理技术,对比分析模拟前后土壤优先流特征的差异性规律。结果表明:模拟干湿交替条件下基质流发生区在0~ 10 cm土层,染色深度高达35 cm,其优先路径的水平宽度仅为3~10 cm,且染色面积曲线波动小。模拟干湿交替条件导致土壤稳定出流速率、大孔隙数量和大孔隙率明显增加,在0~20 cm土层,实施干湿交替后的土壤稳定出流速率较非干湿交替条件高约0.27 cm3·s~(-1),染色区的大孔隙数量增加约1.4倍,大孔隙率则高13.4%。大孔隙数量与稳定出流速率呈极显著正相关,模拟干湿交替后大孔隙数量从大到小依次为: 0.6 ~ 0.8 mm> 0.8~1.0 mm>1.0~1.5 mm>1.5 ~ 2.0 mm>2.0 ~ 3.7 mm,非干湿交替条件下为: 0.8 ~ 1.0 mm> 0.6~0.8 mm>1.0~1.5 mm>2.0~3.7 mm>1.5~2.0 mm。各孔径范围的大孔隙数量与染色面积比呈极显著相关关系,经过模拟干湿交替处理后,其相关性增大,且影响优先流发生的主导因素由孔径1.5~2.0 mm的大孔隙数量变为孔径0.8 ~ 1.0 mm的大孔隙数量。干湿交替作用会通过影响大孔隙特征进而导致土壤更易发生优先流且程度增强。
英文摘要	To clarify the effects of alternation of drying and wetting on the formation of soil preferential flow in arid valley,taking the wasteland in the arid valley of Honghe River as the research object,we analyzed the soil preferential flow characteristics before and after the simulation of drying and wetting alternation based on dyeing tracer method,water breakthrough curve,and image processing technology. The results showed that,under the simulated alternation of drying and wetting, the matrix flow occurred in the 0-10 cm soil layer,the dyeing depth reached 35 cm,the horizontal width of the preferred path was only 3-10 cm,and the dyeing area curve fluctuated little. Simulated alternation of drying and wetting led to significant increases in the steady effluent,macropores number,and macroporosity. In the 0-20 cm soil layer,the steady effluent after alternation of drying and wetting was about 0.27 cm3·s~(-1) higher than that non-alternation of drying and wetting,macropores number in dyeing area was about 1.4 times higher,and the macroporosity was 13.4% higher. The macropores number was positively correlated with stable flow rate. After simulated alternation of drying and wetting,the number of macropores from large to small was 0.6-0.8 mm>0.8-1.0 mm> 1.0-1.5 mm>1.5-2.0 mm>2.0-3.7 mm,while under non-alternation of drying and wetting,it was 0.8-1.0 mm>0.6-0.8 mm>1.0-1.5 mm>2.0-3.7 mm>1.5-2.0 mm. The macropores number in each pore size range was significantly correlated with the dyeing area ratio. After simulated alternation of drying and wetting,the correlation increased,and the dominant factor affecting the occurrence of preferential flow changed from the macropores number in the pore size range of 1.5-2.0 mm to that of 0.8-1.0 mm. Therefore,the alternation of drying and wetting would affect the characteristics of macropores,which caused the soil to be more prone to preferential flow and with higher magnitude.
中文关键词	干湿交替 ; 优先流 ; 水分穿透曲线 ; 大孔隙 ; 染色示踪法
英文关键词	alternate drying and wetting condition preferential flow water breakthrough curve macropore dyeing tracer method
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:7011235
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/365372
作者单位	万艳萍, 西南林业大学生态与环境学院, 昆明, 云南 650224, 中国.; 朱梦雪, 西南林业大学生态与环境学院, 昆明, 云南 650224, 中国.; 卢华兴, 西南林业大学生态与环境学院, 昆明, 云南 650224, 中国.; 涂晓云, 西南林业大学生态与环境学院, 昆明, 云南 650224, 中国.; 赵洋毅, 西南林业大学生态与环境学院;;国家林业和草原局云南玉溪森林生态系统国家定位观测研究站, ;;国家林业和草原局云南玉溪森林生态系统国家定位观测研究站, 昆明;;昆明, ;; 650224;;650224.; 段旭, 西南林业大学生态与环境学院;;国家林业和草原局云南玉溪森林生态系统国家定位观测研究站, ;;国家林业和草原局云南玉溪森林生态系统国家定位观测研究站, 昆明;;昆明, ;; 650224;;650224.; 王克勤, 西南林业大学生态与环境学院;;国家林业和草原局云南玉溪森林生态系统国家定位观测研究站, ;;国家林业和草原局云南玉溪森林生态系统国家定位观测研究站, 昆明;;昆明, ;; 650224;;650224.; 杜云祥, 新平彝族傣族自治县水利局, 玉溪, 云南 653400, 中国.
推荐引用方式 GB/T 7714	万艳萍,赵洋毅,段旭,等. 干湿交替对红河干旱河谷区土壤优先流形成特征的影响[J],2021,32(7):1001-9332.
APA	万艳萍.,赵洋毅.,段旭.,王克勤.,朱梦雪.,...&杜云祥.(2021).干湿交替对红河干旱河谷区土壤优先流形成特征的影响.应用生态学报,32(7),1001-9332.
MLA	万艳萍,et al."干湿交替对红河干旱河谷区土壤优先流形成特征的影响".应用生态学报 32.7(2021):1001-9332.