ZHAO Yunpeng,BAI Yiru,WANG Youqi,et al.patial Variability of Soil Saturated Hydraulic Conductivity in the Yellow River Irrigated Area in Ningxia[J].Northern Horticulture,2017,41(08):166-171.[doi:10.11937/bfyy.201708039]
宁夏引黄灌区土壤饱和导水率空间分异特征
- Title:
- patial Variability of Soil Saturated Hydraulic Conductivity in the Yellow River Irrigated Area in Ningxia
- Keywords:
- soil saturated hydraulic conductivity; geostatistical statistics; Kriging interpolation; Yellow River Irrigated Area; Ningxia
- 文献标志码:
- A
- 摘要:
- 以宁夏引黄灌区农田土壤为例，采用10 m×10 m网格布点的方式，运用经典统计学和地统计学对土壤饱和导水率及相关因素的空间变异特征进行研究分析。结果表明：饱和导水率属于强烈变异；毛管孔隙度、饱和含水量和有机质属于中等变异性；容重和总孔隙度属于弱变异性。地统计结果表明，饱和导水率、饱和含水量和毛管孔隙度是随机性因素和结构性因素共同作用的结果；容重、总孔隙度和有机质主要受结构性因素影响。由其空间变异克里格插值图可知，饱和导水率有较明显的分布规律，但在局部区域呈现出高异质性；其余土壤性质均具有明显的分布规律。Pearson相关性分析可知，影响土壤饱和导水率的主要因素是总孔隙度和容重，依次为饱和含水量、毛管孔隙度和有机质含量。通过分析土壤饱和导水率及其相关因素的空间变异特征可为该地区土壤水分有效利用和农田管理等提供一定的参考依据。
- Abstract:
- The classical and geological statistics were combined to identify the spatial variability of soil saturated hydraulic conductivity and its influencing factors with 10 m×10 m grids in farmland in the Yellow River Irrigated Area in Ningxia Hui Autonomous Region，China.The results showed that the soil saturated hydraulic conductivity had strong variation，capillary porosity,saturation moisture content and soil organic matter showed moderate variations，soil bulk density and total porosity showed weak variation.The geological statistics indicated that saturated hydraulic conductivity，capillary porosity and saturation moisture content were affected by random factors and structural factors，while bulk density，total porosity and soil organic matter primarily affected by structural factors.According to the spatial distribution patterns，saturated hydraulic conductivity had an obvious distribution，while showing high spatial heterogeneity in the local area.The other soil properties had obvious distribution.The total porosity and bulk density was the key influencing factors in saturated hydraulic conductivity by Pearson correlation analysis，followed by saturation moisture content，capillary porosity and soil organic matter.Spatial variability of soil saturated hydraulic conductivity and its influencing factors could provide theoretical guidance for water use efficiency and farmland management.
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备注/Memo
第一作者简介：赵云鹏（1992-），男，山西武乡人，硕士研究生，研究方向为土壤水分运动。E-mail：zyp654951@163.com.责任作者：王幼奇（1980-），男，安徽泾县人，博士，副教授，现主要从事水土资源与环境等研究工作。E-mail：wyq0563@163.com.基金项目：国家自然科学基金资助项目（41461104）；宁夏自然科学基金资助项目（NZ14028）。