Impact of Vibration-tillage of Subsoils on Their Water Retention Curves
TENG Yun
ZHANG Zhongxue
SI Zhenjiang
HUANG Yan
WANG Bai
Abstract：This paper investigated the impact of vibration-tillage of subsoil on water retention curves offive different soils in Heilongjiang Province:Black soil,Chernozem soil,Paddy soil,Soda-saline soil,and sandy soil.Soil moisture under different matric potential controlled by tension table and pressure membrane apparatus was measured during both drying and wetting processes.The measured water retention curves were then fitted to the van Genuchten formula.The differences between the water retention curves,best-fitting parameters,equivalent pore size,soil moisture availability and specific water capacity of the five soils were assessed.The results showed a significant change in water retention curves of the same soil before and after the vibration-tillage.At the same matric potential,the soil water content after vibration-tillage was higher than that before the tillage.Vibrating the subsoil appeared to have significantly improved the availability of soil water,especially for the soda-saline and the black soils.Vibration-tillage of subsoil changed soil structure and increased soil porosity,thereby enhancing the ability of soil to retain and supply water.
Keywords：soil water retention curvevibrating subsoiling tillagewater holding capacitysoil moisture availabilityspecific water capacity
Publication Date：2017-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：7( 52-58 )