文章摘要
王紫薇, 邵明安, 黄来明, 裴艳武, 李荣磊.青海省东部不同土地利用方式下土壤饱和导水率分布及其影响因素[J].水土保持学报,2021,35(3):150~155
青海省东部不同土地利用方式下土壤饱和导水率分布及其影响因素
Distribution and Influencing Factors of Soil Saturated Hydraulic Conductivity Under Different Land Use Patterns in Eastern Qinghai Province
投稿时间:2020-11-05  
DOI:10.13870/j.cnki.stbcxb.2021.03.021
中文关键词: 高寒地区  土地利用方式  饱和导水率  影响因素  土壤传递函数
英文关键词: alpine region  land use pattern  saturated hydraulic conductivity  influencing factors  pedo-transfer function equation
基金项目:第二次青藏高原综合科学考察研究项目(2019QZKK0306);中国科学院青年创新促进会会员项目(2019052);中国科学院地理科学与资源研究所秉维优秀青年人才项目(2017RC203);中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室开放基金项目(A314021402-2010)
作者单位E-mail
王紫薇1, 邵明安1,2,3,4, 黄来明2,3,4, 裴艳武1, 李荣磊1 1. 西北农林科技大学资源环境学院, 陕西 杨凌 712100

2. 中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室
, 北京 100101

3. 中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室
, 陕西 杨凌 712100

4. 中国科学院大学资源与环境学院
, 北京 100049 
mashao@ms.iswc.ac.cn;huanglm@igsnrr.ac.cn 
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中文摘要:
      研究高寒地区土壤饱和导水率分布特征及其影响因素可为评估脆弱生态系统水源涵养能力和构建区域水文模型提供参数。通过测定青海省东部南北样线24个样点(0—30 cm)土壤基本理化性质和饱和导水率(Ks),分析了不同土地利用方式下Ks分布特征及其影响因素。结果表明:Ks均值表现为林地(1.89 cm/h)>草地(1.62 cm/h)>农地(1.41 10 cm/h),其中农地Ks(0.10~3.92 cm/h)随着土层深度增加逐渐减小,而林地(0.28~7.69 cm/h)和草地Ks(0.10~5.34 cm/h)随土层深度增加表现为先增加后减小。不同利用方式下Ks均与pH、容重、孔隙度、黏粒含量、有机质含量及饱和含水量显著相关(P<0.05)。利用多元回归分析获得了农地以总孔隙度、非毛管孔隙度和饱和含水量为输入因子的Ks传递函数,林地以毛管孔隙度和非毛管孔隙度为输入因子的Ks传递函数和草地以容重、非毛管孔隙度和饱和含水量为输入因子的Ks传递函数。研究结果可为其他高寒地区不同土地利用方式下Ks的模拟和预测提供参考。
英文摘要:
      The investigation of soil saturated hydraulic conductivity and its influencing factors in the alpine region is critical for evaluating water conservation capacity of the fragile ecosystem and constructing regional hydrological modeling. The distribution and influencing factors of soil saturated hydraulic conductivity (Ks) under different land use patterns were studied by measuring soil physicochemical properties and Ks in the 0-30 cm soil layers along a north-south transect in the Eastern part of Qinghai Province. The results showed that the average value of Ks followed the decreasing order of forestland (1.89 cm/h) > grassland (1.62 cm/h) > farmland (1.41 cm/h). The Ks of farmland (0.10~3.92 cm/h) decreased gradually with the increasing of soil depth, while Ksof forestland (0.28~7.69 cm/h) and grass (0.10~5.34 cm/h) land increased first and then decreased with the increasing of soil depth. Ks was significantly correlated with soil physical and chemical properties such as pH, bulk density, porosity, clay content, organic matter content and saturated water content (P<0.05). The multiple regression analysis showed that the Ks pedo-transfer function equations of farmland was obtained using total porosity, non-capillary porosity and saturated water content as input parameters, the Ks pedo-transfer function equation of forestland was obtained by using capillary porosity and non-capillary porosity as input parameters, and the Ks pedo-transfer function equation of grassland was obtained by using bulk density, non-capillary porosity and saturated water content as input parameters. The results could provide reference for the simulation and prediction of Ks under different land use patterns in other alpine regions.
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