期刊论文

Characteristics of Soil Water Transport and Holding Capacity in Paddy and Inner Field-Bund Transition Zones

中文

水土保持学报

1009-2242

2017

31

2

122-128

10.13870/j.cnki.stbcxb.2017.02.022

41601215:国家自然科学基金 2015CFA141:湖北省自然科学基金重点项目 CCNU16A05015:中央高校基本科研业务费专项 CCNU15A05002:中央高校基本科研业务费专项

本校为第一机构

为揭示田埂对稻田水分渗漏的影响,以江汉平原典型稻田—田埂过渡区为研究对象,采用室内土壤理化性质分析、水力学参数测定和田间染色示踪等方法量化了过渡区各位点(田内、田埂和灌溉沟)土壤剖面导水与持水性能差异,并揭示了该区域的水流特征。结果表明:(1)不同位点的土壤饱和导水率(K_s)均随土层深度的增加而减小,上层(-20—35cm)高于中、下层(35—65cm),剖面导水性能表现为田埂>灌溉沟>田内,田埂平均Ks分别是灌溉沟和田内的1.6倍和16.0倍;(2)同一吸力值下不同位点土壤含水量差异较大,田内含水量最高,灌溉沟其次,田埂最低,在持水性能上表现为田内>灌溉沟>田埂;(3)田埂土壤受动物活动和根系生长影...

The objectives of this study were to quantify the characteristics of water transport and conservation in different locations (the inner field,paddy bund,and irrigation canal) in the paddy inner field-bund transition zones,and to identify the dominant pathways for water flow in these zones.Two typical transition zones in a more than 100-year paddy fields were investigated by soil sample analysis and dye tracing field experiment in the Jianghan Plain,Hubei Province.Saturated hydraulic conductivity (Ks) decreased with increasing soil depth for each site,and was characterized by higher standard de...