The thermodynamics parameters,partial molal free energy( Δ ),partial molal enhalpy( Δ )and partial entropy( Δ ),of moisture in SPAC of agriculture ecosystem were studied,the results showed that the moisture ladder degree between soil and plant could increase under phosphate fertilizer application level.It was beneficial to transport of soil moisture from soil to plant.The increased value of Δ s-Δ p is greater than the decended value of Δ s and Δ p.Thus,the “absorption water effect” fro...