Pedosphere 1(3): 193--206, 1991
ISSN 1002-0160/CN 32-1315/P
©1991 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Hydraulic Resistance and Capacitance in the Soil-Plant System |
| SHAO MING-AN, L.P. SIMMONDS, CHEN ZHI-XIONG |
| Northwestern Institute of Soil and Water Conservation, Academia Sinica and Ministry of Water Resources, Yangling, Shaanxi Province 712100 |
| ABSTRACT |
| 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. |
| Key Words: |
| Citation: Shao, M. A., Simmonds, L.P. and Chen, Z. X. 1991. Hydraulic Resistance and Capacitance in the Soil-Plant System. Pedosphere. 1(3): 193-206. |
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