Hydraulic Resistance and Capacitance in the Soil-Plant System

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In this paper, the hydraulic resistances and capacitances were evaluated. based on the development of non-(?) model of water flow in the soil-plant system and the simulating experiment work.The results show that the mean hydraulic resistance in the soil-plant system is 6.79×109 MPa·S·m-3; the mean hydraulic capacitance in the system is 5.2×107m3·MPa-1. In the components of hydraulic capacitance in the system, the capacitance in soil (81.8×10-6m3·MPa ) is the biggest and its variability with suii water potential is extremely strong, the capacitance in plant (5.3×10-7m3·MPa-1) is much smaller than that in soil, and the capacitance in shoots (15.5×10-7m3·2MPa-1) is bigger than that in roots (8.4×10-7m3·2MPa-1). An interesting result is that the capacitance in plant is almost equivalent to that in the soil-plant system. In this paper, the hydraulic resistances and capacitances were evaluated. Based on the development of non- (?) Model of water flow in the soil-plant system and the simulating experiment work. The results show that the mean hydraulic resistance in the soil- plant system is 6.79 × 109 MPa · S · m-3; the mean hydraulic capacitance in the system is 5.2 × 107 m 3 · MPa-1. In the components of hydraulic capacitance in the system, the capacitance in soil (81.8 × 10 -6 m3 · MPa) is the biggest and its variability with suii water potential is extremely strong, the capacitance in plant (5.3 × 10-7m3 · MPa-1) is much smaller than that in soil, and the capacitance in shoots (15.5 × 10- 7m3 · 2MPa-1) is bigger than that in roots (8.4 × 10-7m3 · 2MPa-1). An interesting result is that the capacitance in plant is almost equivalent to that in the soil-plant system.
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