Soil Water Characteristics Between Undisturbed and Disturbed Soils in Greenhouse Soil

In order to study soil water characteristics in greenhouse soil,the soil water retention curve,hydrophysical property and specific water capacity were analyzed and water characteristics for both undisturbed and disturbed soils were compared in greenhouse in Shuangliu County of Sichuan Province.Results showed that the change of soil water retention curve in disturbed soil was the same as that of undisturbed soil generally.On the condition of the same soil water suction,soil water content of disturbed soil was higher than that of undisturbed soil in low suction stage,while the difference of soil water content was not significant between disturbed and undisturbed soils in high suction stage.There was the same tendency in profile change of capillary porosity,total porosity and wilting coefficient in both disturbed and undisturbed soils.The difference was not significant between field capacity and available water content for disturbed soil,while field capacity and available water content showed the decreasing tendency along with increasing soil layer for undisturbed soil. On the condition of the same soil water suction,the specific water capacity of disturbed soil was far above that of undisturbed soil in low suction stage,while the change of specific water capacity showed the same tendency between disturbed soil and undisturbed soil along with increasing soil water suction.