盐渍化地区土壤水分运动参数的测定及标定

针对盐渍化地区作物受土壤水分和盐分联合胁迫影响的复杂机理,以内蒙古河套灌区主要经济作物油料向日葵为研究对象,采用田间试验的方法对北方盐渍化地区作物根系吸水模型进行了研究。通过田间和实验室分别测定了土壤水分运动特征参数,并对田间实测土壤基质势进行了标定,建立了土壤基质势和饱和度之间的数学模型。此研究为盐渍化地区土壤水分运动的研究提供了依据,可作为盐渍化地区SPAC系统研究的参考。

The Measurement of the Soil-water Movement Parameters in Saline Soil

Aiming to the complex mechanics of water-salt stress,this paper mainly studied crop root uptake model in saline soil of north China.With limited,the paper only focus on the measurement of the soil-water movement parameters,and established oil sunflower crop root uptake model in saline soil.The soil-water movement parameters are measured in laboratory and field,at the sometime,the soil matrix potential measured in the field is scaled and established the mathematic model between the soil matrix potential and the saturation degree.The root uptake water rate is calculated based on the data of soil matrix potential and soil water content.This study offers the theoretical basis for researching the soil water movement,and it is the basis of researching the SPAC system in saline soil.