干旱区地理2011，Vol.34Issue(1)：86-90,5.
溶质类型与矿化度对土壤水分扩散率的影响
Effect of solute type and mineralizations on soil moisture diffusivity
摘要
Abstract
The unsaturated soil moisture diffusivity is one of the important parametres of studying soil water and salt movement. At present,a few researches have been given more attention to the influence of soil water movement on salt transfer in water and salt complex system, but the study on the constraint relationship of salt transfer to water movement was deficient. Because soil moisture movement parameters were influenced by many factors and the process of soil formation, such as soil texture, soil structure, the content of organic matter, the process of swell and shrinkage, soil structure collapse and pore blocking, ion dissociation and exchange, soil atmosphere blocking and so on. it was also influenced by ions composition and concentration of soil solution, especially in salinized soil and irrigation soil with salt water, the influence of water quality on soil water movement parameters was more important.The object of study was orchard calcareous soils in Qin 'an County of Gansu Province, the influence of three kinds sodic salinity (NaC1,Na2SO4 ,Na2CO3 ) of the different mineralizations (1 g/L,3 g/L,5 g/L,lO g/L) on soil moisture diffusivity were studied by the method of horizontal soil column infiltration: The results showed that the velocity of salt and water movement was not in-phase in water-salt system, salt type was involved in the mostly influence factors in the same time. NaCI accelerated the velocity of soil water movement, but it suppressed that of soil water diffusivity; and both Na2SO4 and Na2CO3 suppressed the velocity of soil water movement and soil water diffusivity.The influence of salt solution on soil basement membrance properties was greater than the properties of transport liquid,the influence of NaC1 and Na2SO4 on soil basement membrance properties and transporting liquid propertieswere more obvious than Na2CO3.关键词
溶质类型/矿化度/土壤基膜特性/石灰性土壤/土壤水分扩散率Key words
solute type/ soil basement membrane properties/ calcareous soils/ moisture diffusivity分类
农业科技引用本文复制引用
郭全恩,王益权,马忠明,车宗贤,南丽丽,徐世文,刘延东..溶质类型与矿化度对土壤水分扩散率的影响[J].干旱区地理,2011,34(1):86-90,5.基金项目
甘肃省自然科学研究基金项目(0803KJZA040)和甘肃省国际合作项目(090WCGA902)资助 （0803KJZA040）
