期刊论文

Difference of Soil Water Characteristic Curves of Subtropical Soils with NaCl Solutions Treatments and Models Optimization

Wang, Hui(wanghuisb@126.com)

中文

农业机械学报

1000-1298

2018

49

4

290-296,329

10.6041/j.issn.1000-1298.2018.04.033

国家自然科学基金项目（41471185） 湖南省教育厅科学研究重点项目（15A084） 湖南省重点研发计划项目（2016JC2032） 湖南省研究生科研创新项目（CX2017B363）

本校为第一且通讯机构

携带大量盐分的低质水长期灌溉导致土壤存在极大的物理化学特性退化风险,为了探究盐分对土壤水分特征曲线影响的差异性,采用压力膜法对亚热带地区粘性潮土、沙性潮土、红壤、紫色土、水稻土等5种土壤进行室内测定,对比分析了各土壤在0、5、10、15 g/L等4个钠盐浓度水平下土壤水分特征曲线的差异,并利用RETC软件结合数理统计方法确定了各土壤不同钠盐浓度水平下相应的最优拟合模型。结果表明:钠盐处理均可提高各土壤的持水能力,且粘粒含量较高的土壤影响显著;钠盐处理减少了粘性潮土、沙性潮土和红壤的有效含水率,分别最大减少了40.8%、30.5%、31.5%,却提高了紫色土、水稻土有效含水率,分别最大提...

Long-term irrigation of low quality water carrying large amounts of salt causes a significant degradation risk of soil physicochemical properties. The determination of difference in the influence of salinity on soil water characteristic curve of five subtropical soils, such as clay fluvo aquic soil, sandy fluvo aquic soil, red soil, purple soil and paddy soil, were investigated and these soils treatments with four different NaCl solutions (0 g/L, 5 g/L, 10 g/L and 15 g/L) were prepared to obtain the soil water characteristic curves of drying pr...